Articles de revues : « Photoconductivity - ZnO based Nanocomposites »

1

Han, Lei, Wen Li, Chao Meng, Yan Chen et Shan Fan. « Charge transport mechanism of polyaniline/ZnO nanocomposites based on inorganic/organic heterojunctions ». MATEC Web of Conferences 179 (2018) : 02005. http://dx.doi.org/10.1051/matecconf/201817902005.

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The key to improve the photocurrent is how to promote the generation rate and reduce the recombination rate of the photo-hole pair. In this paper, a p-n heterjunction structure in Polyaniline (PANI)/ZnO nanocomposites was formed via mechanical mixing process. Compared with ZnO, PANI doped ZnO nanocomposites exhibit obviously enhanced response. It might be attributed to the p-n heterojunctions formed between p-type and n-type enhanced response, enhancing the charge separation and in turn promoting the photoconductivity of the film. The 5at-%PANI doped ZnO nanocomposites demonstrates the highest response.

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Petrov, Victor V., Victor V. Sysoev, Irina O. Ignatieva, Irina A. Gulyaeva, Maria G. Volkova, Alexandra P. Ivanishcheva, Soslan A. Khubezhov, Yuri N. Varzarev et Ekaterina M. Bayan. « Nanocomposite Co3O4-ZnO Thin Films for Photoconductivity Sensors ». Sensors 23, n^o 12 (15 juin 2023) : 5617. http://dx.doi.org/10.3390/s23125617.

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Thin nanocomposite films based on zinc oxide (ZnO) added with cobalt oxide (Co3O4) were synthesized by solid-phase pyrolysis. According to XRD, the films consist of a ZnO wurtzite phase and a cubic structure of Co3O4 spinel. The crystallite sizes in the films increased from 18 nm to 24 nm with growing annealing temperature and Co3O4 concentration. Optical and X-ray photoelectron spectroscopy data revealed that enhancing the Co3O4 concentration leads to a change in the optical absorption spectrum and the appearance of allowed transitions in the material. Electrophysical measurements showed that Co3O4-ZnO films have a resistivity up to 3 × 104 Ohm∙cm and a semiconductor conductivity close to intrinsic. With advancing the Co3O4 concentration, the mobility of the charge carriers was found to increase by almost four times. The photosensors based on the 10Co-90Zn film exhibited a maximum normalized photoresponse when exposed to radiation with wavelengths of 400 nm and 660 nm. It was found that the same film has a minimum response time of ca. 26.2 ms upon exposure to radiation of 660 nm wavelength. The photosensors based on the 3Co-97Zn film have a minimum response time of ca. 58.3 ms versus the radiation of 400 nm wavelength. Thus, the Co3O4 content was found to be an effective impurity to tune the photosensitivity of radiation sensors based on Co3O4-ZnO films in the wavelength range of 400–660 nm.

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Bian, Lin, Shi Sheng Lv, Jian Xun Qiu, Xin Tao Zhang, Ming Jun Gao, Xiao Chun He, Xing Fa Ma et Guang Li. « Organic Functionalization and Properties of ZnO Nanosheets with Polymer Containing N-Vinyl Carbazole ». Materials Science Forum 898 (juin 2017) : 2118–27. http://dx.doi.org/10.4028/www.scientific.net/msf.898.2118.

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To make full use of the visible light more effectively, many studies are focuses on ZnO baesd nanocomposites. To modify the surface of ZnO with functional polymer is a very simple and effective approach. PVK (N-vinyl carbazole polymer) is one of typical organic functional materials, which is generally used as charge transfer materials for the applications of several organic electronic devices. Surface modification of ZnO nanosheets with polymer containing –COOH and N-vinyl carbazole group was performed with self-assembly process for improving the adsorption to visible light and properties of charge transfer in nanoscale. A series of characterizations were carried out by SEM (scanning electron microscopy), Fourier-Transform Infrared (FTIR) spectra, UV-Vis (Ultra-violet visible spectroscopy), et al. The adsorption of the nanocomposite was extended to the region of visible light. The photoconductivity response to weak visible light was studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate with casting method. The photocurrent of ZnO nanosheets modified with the polymer containing N-vinyl carbazole to weak visible light was changed greatly. The organic-inorganic nanocomposite showed good activities to visible light, with which it can be easily produced photo-induced charges, avoiding the recombination of charges produced by visible light. Photocatalytic efficiency was examined by selecting typical organic pollutants and some good results were obtained, showing much prospect in the fields of photocatalysts, nanoreactors, self-cleaning films, coatings, and organic pollutants treatment of environmental.

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Guo, Bin, Bo Zhang, Qin Cong, Lu Wei Ma, Xiao Chun He, Ming Jun Gao, Lin Bian, Xing Fa Ma et Guang Li. « Surface Modification of Low-Dimensional Heterostructured Functional Materials with Dendrimers and their Properties of Organic-Inorganic Nanocomposites ». Materials Science Forum 847 (mars 2016) : 299–307. http://dx.doi.org/10.4028/www.scientific.net/msf.847.299.

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Low-dimensional heterostructured functional materials have been widely applied in new energy materials, catalysts, et al. However, to enhance photo-response in visible light and the biocompatibility improvement are still the great challenges faced. And the dendrimers act good roles in transferring the drug and gene, and has good biocompatibility. Self-assembly on the surface of low-dimensional heterostructured functional materials with dendrimers holding-COOH groups was carried out in this paper. The characterizations of the materials were examined by SEM (scanning electron microscopy), XRD (X-ray diffraction), the Fourier-Transform Infrared (FTIR) spectra, ultraviolet-visible spectroscopy (UV-Vis) and so on. The photoconductivity response to visible light and 808 nm laser with low-power were studied based on interdigital electrodes of Au on flexible PET (polyethylene terephthalate) film substrate. The results indicated that ZnO/CuS modified with dendrimers showed good photo-response to visible light and 808 nm laser, the photo-response properties enhanced greatly by adding some small amount of grapheme oxide. Photocatalytic efficiency was examined by selecting typical organic pollutants, some good results were obtained. The external stimuli driven nanorobots for removal the organic pollutants or toxins in the living body have been developed.

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Chizhov, Artem, Marina Rumyantseva, Nikolay Khmelevsky et Andrey Grunin. « Sensitization of ZnO Photoconductivity in the Visible Range by Colloidal Cesium Lead Halide Nanocrystals ». Nanomaterials 12, n^o 23 (5 décembre 2022) : 4316. http://dx.doi.org/10.3390/nano12234316.

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In this work, colloidal perovskite nanocrystals (PNCs) are used to sensitize the photoconductivity of nanocrystalline ZnO films in the visible range. Nanocrystalline ZnO with a crystallite size of 12–16 nm was synthesized by precipitation of a zinc basic carbonate from an aqueous solution, followed by annealing at 300 °C. Perovskite oleic acid- and oleylamine-capped CsPbBr3, CsPb(Cl/Br)3 and CsPb(Br/I)3 PNCs with a size of 6–13 nm were synthesized by a hot injection method at 170 °C in 1-octadecene. Photoconductive nanocomposites were prepared by applying a hexane sol of PNCs to a thick (100 μm) polycrystalline conductive ZnO layer. The spectral dependence of the photoconductivity, the dependence of the photoconductivity on irradiation, and the relaxation of the photoconductivity of the obtained nanocomposites have been studied. Sensitization of ZnO by CsPbBr3 and CsPb(Cl/Br)3 PNCs leads to enhanced photoconductivity in the visible range, the maximum of which is observed at 460 and 500 nm, respectively; close to the absorption maximum of PNCs. Nanocomposites ZnO/CsPb(Br/I)3 turned out to be practically not photosensitive when irradiated with light in the visible range. The data obtained are discussed in terms of the position of the energy levels of ZnO and PNCs and the probable PNCs photodegradation. The structure, morphology, composition, and optical properties of the synthesized nanocrystals have also been studied by XRD, TEM, and XPS. The results can be applied to the creation of artificial neuromorphic systems in the visible optical range.

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Wu, Jun, Huayao Li, Yuan Liu et Changsheng Xie. « Photoconductivity and trap-related decay in porous TiO2/ZnO nanocomposites ». Journal of Applied Physics 110, n^o 12 (15 décembre 2011) : 123513. http://dx.doi.org/10.1063/1.3662954.

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Uddin, Islam. « An Overview of Photoconductivity in Zn-based Nanomaterials ». Advanced Nano Research 3, n^o 1 (16 octobre 2020) : 46–50. http://dx.doi.org/10.21467/anr.3.1.46-50.

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Photoconductivity is a phenomenon in which the electrical conductivity of a material increases upon exposure to light. Zn-based nanomaterials, including ZnO and ZnS nanoparticles, nanowires, and nanorods, have gained considerable attention in recent years due to their unique photoconductive properties. Photoconductivity is a fundamental property of materials that refers to the increase in electrical conductivity upon absorption of light. This paper provides an overview of photoconductivity in Zn-based nanomaterials, including the mechanisms of photoconductivity, and the factors affecting it, such as size, morphology, and doping, and highlights the prospects of zinc-based nanomaterials in optoelectronics.

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Tzeng, Shi-Kai, Min-Hsiung Hon et Ing-Chi Leu. « Persistent Photoconductivity of Solution-Grown ZnO–Based UV Detectors ». Journal of The Electrochemical Society 158, n^o 11 (2011) : H1188. http://dx.doi.org/10.1149/2.086111jes.

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Wang, Chao-Jun, Xun Yang, Jin-Hao Zang, Yan-Cheng Chen, Chao-Nan Lin, Zhong-Xia Liu et Chong-Xin Shan. « Ultraviolet irradiation dosimeter based on persistent photoconductivity effect of ZnO ». Chinese Physics B 29, n^o 5 (mai 2020) : 058504. http://dx.doi.org/10.1088/1674-1056/ab8891.

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Chitra, M., G. Mangamma, K. Uthayarani, N. Neelakandeswari et E. K. Girija. « Band gap engineering in ZnO based nanocomposites ». Physica E : Low-dimensional Systems and Nanostructures 119 (mai 2020) : 113969. http://dx.doi.org/10.1016/j.physe.2020.113969.

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Noothongkaew, Suttinart, Orathai Thumthan et Ki-Seok An. « UV-Photodetectors based on CuO/ZnO nanocomposites ». Materials Letters 233 (décembre 2018) : 318–23. http://dx.doi.org/10.1016/j.matlet.2018.09.024.

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Merijs Meri, R., I. Bochkov, A. Grigalovca, J. Zicans, J. Grabis, R. Kotsilkova et I. Borovanska. « Nanocomposites Based on ZnO Modified Polymer Blends ». Macromolecular Symposia 321-322, n^o 1 (décembre 2012) : 130–34. http://dx.doi.org/10.1002/masy.201251122.

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D. HUSSEIN, Amel. « FABRICATION SENSORS BASED ON NANOCOMPOSITES ZnO/PVDF ». MINAR International Journal of Applied Sciences and Technology 04, n^o 03 (1 septembre 2022) : 123–28. http://dx.doi.org/10.47832/2717-8234.12.13.

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This paper focused on generated output voltage by converting the mechanical energy to electrical response piezoelectric output voltage by tapping the finger of the hand on flexible nanogenerators fabrication of nanocomposites fibers (zinc oxide/polyvinylidene fluoride) ZnO/PVDF. Since, zinc oxide nanostructured materials have unique properties as their nanostructures, semiconducting, and piezoelectric which synthesize practically simply by a hydrothermal process at low temperatures. The structure and morphology of reactant materials, and, the fabricated nanofibers of the nanocomposites are characterized by XRD and SEM. The output is measured by an oscilloscope. The maximum output piezoelectric voltage for 18%ZnO–16%PVDF was 1.600 V. Therefore, the generators can be used as sensors in medical applications and other fields.

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Anandhi, P., V. Jawahar Senthil Kumar et S. Harikrishnan. « Improved electrochemical behavior of metal oxides-based nanocomposites for supercapacitor ». Functional Materials Letters 12, n^o 05 (17 septembre 2019) : 1950064. http://dx.doi.org/10.1142/s1793604719500644.

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This paper investigates the synthesis and enhanced electrochemical behaviors of ZnO and NiO/ZnO nanocomposites for electrode material of supercapacitors. ZnO and NiO/ZnO nanocomposites were produced via sol–gel technique. Transmission electron microscopy (TEM) and field emission scanning electron microscopy (FESEM) were used to determine the size and structure of as-synthesized nanomaterials, respectively. The capacitive behavior and charge–discharge characteristics of the electrode using ZnO and NiO/ZnO nanocomposites (as active material) were individually probed with the help of cyclic voltammetry (CV) and galvanostatic charge-discharge tests, respectively. The specific capacitance of nanocomposites-based electrode calculated from galvanostatic charge-discharge tests was 469[Formula: see text]F [Formula: see text] at the scan rate of 1[Formula: see text]mA [Formula: see text] in 1M Na2SO4 electrolyte. The power density and energy density at the current density of 1[Formula: see text]mA [Formula: see text] were determined as 1458.33[Formula: see text]W [Formula: see text] and 91.14[Formula: see text]Wh[Formula: see text][Formula: see text], respectively. Hence, NiO/ZnO nanocomposites could be reckoned to be a promising electrode material for supercapacitor while comparing to ZnO-based electrode material.

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Scolfaro, D., Y. J. Onofre, M. D. Teodoro et M. P. F. de Godoy. « Atmosphere-Dependent Photoconductivity of ZnO in the Urbach Tail ». International Journal of Photoenergy 2018 (21 octobre 2018) : 1–8. http://dx.doi.org/10.1155/2018/8607247.

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Photoconductivity is a fundamental and highly applicable phenomenon for semiconductor oxide-based devices, and the presence of defects plays a significant role in this mechanism. Here, we present an investigation based on different atmospheres and light excitation (above and below bandgap) dependences of zinc oxide thin film grown by spray-pyrolysis. As-grown ZnO presents a representative Urbach tail associated to the presence of localized levels in the bandgap. Photoconductivity response and decay times are investigated for air and inert atmospheres as well as under vacuum conditions with significant features due to light excitation conditions. The observed characteristics are explained based on oxygen photodesorption when excitation is above bandgap while this process is suppressed when excitation is below bandgap.

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Hui, Aiping, Fangfang Yang, Rui Yan, Yuru Kang et Aiqin Wang. « Palygorskite-Based Organic–Inorganic Hybrid Nanocomposite for Enhanced Antibacterial Activities ». Nanomaterials 11, n^o 12 (28 novembre 2021) : 3230. http://dx.doi.org/10.3390/nano11123230.

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A synergistic antibacterial strategy is effective in enhancing the antibacterial efficacy of a single antibacterial material. Plant essential oils (PEOs) are safe antibacterial agents. However, some of their characteristics such as intense aroma, volatility, and poor thermal stability limit their antibacterial activity and applications. In this paper, five kinds of PEOs were incorporated onto ZnO/palygorskite (ZnO/PAL) nanoparticles by a simple adsorption process to form organic–inorganic nanocomposites (PEOs/ZnO/PAL) with excellent antibacterial properties. TEM and SEM analyses demonstrated that ZnO nanoparticles uniformly anchored onto the surface of rod-like PAL, and that the structure of ZnO/PAL maintained after the incorporation of ZnO nanoparticles and PEOs. It was found that carvacrol/ZnO/palygorskite (CAR/ZnO/PAL) exhibited higher antibacterial activities than other PEOs/ZnO/PAL nanocomposites, with minimum inhibitory concentration (MIC) values of 0.5 mg/mL and 1.5 mg/mL against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), respectively. Moreover, the antibacterial efficiency of CAR/ZnO/PAL nanocomposites was superior to that of ZnO/PAL and pure CAR, demonstrating the synergistic effect that occurs in the combined system. PAL serving as a carrier for the combination of organic PEOs and ZnO nanoparticles is an effective strategy for enhanced, clay-based, organic–inorganic hybrid antibacterial nanocomposites.

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Sharma, Prashant, Na-Yoon Jang, Jae-Won Lee, Bum Chul Park, Young Keun Kim et Nam-Hyuk Cho. « Application of ZnO-Based Nanocomposites for Vaccines and Cancer Immunotherapy ». Pharmaceutics 11, n^o 10 (26 septembre 2019) : 493. http://dx.doi.org/10.3390/pharmaceutics11100493.

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Engineering and application of nanomaterials have recently helped advance various biomedical fields. Zinc oxide (ZnO)-based nanocomposites have become one of the most promising candidates for biomedical applications due to their biocompatibility, unique physicochemical properties, and cost-effective mass production. In addition, recent advances in nano-engineering technologies enable the generation of ZnO nanocomposites with unique three-dimensional structures and surface characteristics that are optimally designed for in vivo applications. Here, we review recent advances in the application of diverse ZnO nanocomposites, with an especial focus on their development as vaccine adjuvant and cancer immunotherapeutics, as well as their intrinsic properties interacting with the immune system and potential toxic effect in vivo. Finally, we summarize promising proof-of-concept applications as prophylactic and therapeutic vaccines against infections and cancers. Understanding the nano-bio interfaces between ZnO-based nanocomposites and the immune system, together with bio-effective design of the nanomaterial using nano-architectonic technology, may open new avenues in expanding the biomedical application of ZnO nanocomposites as a novel vaccine platform.

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Rahman, Mohammed M., Hadi M. Marwani, Faisal K. Algethami et Abdullah M. Asiri. « Xanthine sensor development based on ZnO–CNT, ZnO–CB, ZnO–GO and ZnO nanoparticles : an electrochemical approach ». New Journal of Chemistry 41, n^o 14 (2017) : 6262–71. http://dx.doi.org/10.1039/c7nj00278e.

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The wet-chemical method was used to prepare the various ZnO–CNT, ZnO–CB, ZnO–GO nanocomposites, and ZnO nanoparticles in higher pH medium, which were finally utilized with 5% nafion to produce a thin film of NCs/Nafion/GCE sensor that has a faster response towards selected xanthine with higher sensitivity, lower detection limit, and large linear dynamic range by electrochemical approach.

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Bayan, S., et D. Mohanta. « ZnO nanorod-based UV photodetection and the role of persistent photoconductivity ». Philosophical Magazine 92, n^o 32 (11 novembre 2012) : 3909–19. http://dx.doi.org/10.1080/14786435.2012.698761.

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Mridha, S., et D. Basak. « ZnO/polyaniline based inorganic/organic hybrid structure : Electrical and photoconductivity properties ». Applied Physics Letters 92, n^o 14 (7 avril 2008) : 142111. http://dx.doi.org/10.1063/1.2898399.

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Ibrahem, Mohammed A., Emanuele Verrelli, Fei Cheng, Ali M. Adawi, Jean-Sebastien G. Bouillard et Mary O'Neill. « Persistent near-infrared photoconductivity of ZnO nanoparticles based on plasmonic hot charge carriers ». Journal of Applied Physics 131, n^o 10 (14 mars 2022) : 103103. http://dx.doi.org/10.1063/5.0079006.

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We report on the coupling of ZnO nanoparticles with plasmonic gold nanoislands in a solution-processed photodetector, which results in a clear enhancement in the optical absorption and the electrical responsivity of ZnO nanoparticles, to cover the visible and the near-IR (NIR) spectral range, well beyond its intrinsic optical absorption. This enhancement, which arises from the coupling between ZnO nanoparticles and the plasmonically mediated hot electron generation in the Au plasmonic nanoislands, results in a significant plasmonically driven photoresponse in the NIR of 2.5 × 10−5 A/W. The recorded photocurrent exhibits a persistent behavior, which is attributed to surface defect states in the ZnO nanoparticles. This study provides a route to the solution-processed, low-cost device fabrication schemes with important implications on low processing temperature optoelectronics technology to enhance the performance of photovoltaic devices over a wide solar spectrum. Additionally, this unusual behavior paves the way toward harnessing plasmonic resonances to probe and examine the surface defects of metal oxide semiconductors.

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Mu, Haichuan, Yanming Gu et Haifen Xie. « Photocatalysis of Nickel-Based Graphene/Au/ZnO Nanocomposites ». IEEE Sensors Journal 19, n^o 14 (15 juillet 2019) : 5376–88. http://dx.doi.org/10.1109/jsen.2019.2907712.

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Liao, Zhijia, Yao Yu, Zhenyu Yuan et Fanli Meng. « Ppb-Level Butanone Sensor Based on ZnO-TiO2-rGO Nanocomposites ». Chemosensors 9, n^o 10 (6 octobre 2021) : 284. http://dx.doi.org/10.3390/chemosensors9100284.

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In this paper, ZnO-TiO2-rGO nanocomposites were successfully synthesized by the hydrothermal method. The morphology and structure of the synthesized nanomaterials were characterized by SEM, XRD, HRTEM, and XPS. Butanone is a typical ketone product. The vapors are extremely harmful once exposed, triggering skin irritation in mild cases and affecting our breathing in severe cases. In this paper, the gas-sensing properties of TiO2, ZnO, ZnO-TiO2, and ZnO-TiO2-rGO nanomaterials to butanone vapor were studied. The optimum operating temperature of the ZnO-TiO2-rGO sensor is 145 °C, which is substantially lower than the other three sensors. The selectivity for butanone vapor is greatly improved, and the response is 5.6 times higher than that of other organic gases. The lower detection limit to butanone can reach 63 ppb. Therefore, the ZnO-TiO2-rGO sensor demonstrates excellent gas-sensing performance to butanone. Meanwhile, the gas-sensing mechanism of the ZnO-TiO2-rGO sensor to butanone vapor was also analyzed.

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Kaur, Daljeet, Amardeep Bharti, Tripti Sharma et Charu Madhu. « Dielectric Properties of ZnO-Based Nanocomposites and Their Potential Applications ». International Journal of Optics 2021 (22 juillet 2021) : 1–20. http://dx.doi.org/10.1155/2021/9950202.

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Energy storage devices constitute one of the research areas in recent years. Capacitors are commonly used for the storage of electrical energy. The current research is focusing on not only the improvement in energy density but also the materials which are environment friendly. Polymer composites are known to be technically essential materials owing to their wide range of applications. Enormous research has been devoted to zinc oxide- (ZnO-) based polymer nanocomposites, due to their extraordinary dielectric properties. This review article presents a detailed study of the dielectric properties of ZnO-based nanocomposites. The dielectric constant study includes the effect of transition metals and rare earth metals as a dopant in ZnO. This review gives an insight into the mechanism responsible for the variation of dielectric constant in ZnO nanocomposites due to various factors like size of nanoparticles, thickness of the thin film, operating frequency, doping concentration, and atomic number. The observations have been summarized to convey the mechanism and structural changes involved in the ZnO nanocomposites to the researchers. The deployment of biodegradable nanocomposite materials is expected to open an innovative way for their outstanding electronic applications as storage materials.

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Kannan, Karthik, Mostafa H. Sliem, Aboubakr M. Abdullah, Kishor Kumar Sadasivuni et Bijandra Kumar. « Fabrication of ZnO-Fe-MXene Based Nanocomposites for Efficient CO2 Reduction ». Catalysts 10, n^o 5 (15 mai 2020) : 549. http://dx.doi.org/10.3390/catal10050549.

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A ZnO-Fe-MXene nanocomposite was fabricated and examined with diverse spectroscopic techniques. The hexagonal structure of ZnO, MXene, and ZnO-Fe-MXene nanocomposites were validated through XRD. FTIR showed the characteristic vibrational frequencies of ZnO and MXene. The micrographs of the SEM showed nanoparticles with a flower-like structure. The electrocatalytic reduction efficiency of ZnO-Fe-MXene nanocomposite was analyzed through cyclic voltammetry and electrochemical impedance spectroscopy methods. The ZnO-Fe-MXene electrode was confirmed to have a high current density of 18.75 mA/cm2 under a CO2 atmosphere. Nyquist plots also illustrated a decrease in the impedance of the ZnO-Fe-MXene layer, indicating fast charge transfer between the Zn and MXene layers. Additionally, this electrochemical study highlights new features of ZnO-Fe-MXene for CO2 reduction.

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Geetha, P., E. Sai Ram, N. Anasuya et P. Sarita. « Facile Synthesis of Graphene Based ZnO Nanocomposite ». Volume 4,Issue 5,2018 4, n^o 5 (28 octobre 2018) : 508–10. http://dx.doi.org/10.30799/jnst.158.18040512.

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Graphene is one of the best conductive materials for developing nanocomposites due to its outstanding electronic properties. Graphene is developed by modified Hummers’ method. Zinc oxide (ZnO) based composites were developed by using different weight percentages (0.1%, 0.5% and 1%) as reinforcement. To enhance the dispersion of graphene in ZnO matrix the synthesis was processed by ultrasonication process. The obtained graphene oxide, ZnO and composites were characterized by X-ray diffractometer (XRD), Fourier transform infrared spectroscopy (FTIR) and field emission scanning electron microscopy (FESEM) techniques for structural information, band analysis and surface morphology respectively. The proposed nanocomposites were developed by varying loading percentages 0.1%, 0.5% and 1% weight of graphene. These materials are used in various applications like varistors, energy storage, sensors, super capacitors and so on.

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Ivanoff Reyes, Pavel, Chieh-Jen Ku, Ziqing Duan, Yi Xu, Eric Garfunkel et Yicheng Lu. « Reduction of persistent photoconductivity in ZnO thin film transistor-based UV photodetector ». Applied Physics Letters 101, n^o 3 (16 juillet 2012) : 031118. http://dx.doi.org/10.1063/1.4737648.

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Ann, Ling Chuo, Shahrom Mahmud, Siti Khadijah Mohd Bakhori, Amna Sirelkhatim, Dasmawati Mohamad, Habsah Hasan, Azman Seeni et Rosliza Abdul Rahman. « Enhanced Photoconductivity and Antibacterial Response of Rubber-Grade ZnO upon UVA Illumination ». Advanced Materials Research 925 (avril 2014) : 33–37. http://dx.doi.org/10.4028/www.scientific.net/amr.925.33.

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Ultraviolet-A (UVA) radiation is present in sunlight and have been associated with various types of human skin cancers. In this study, rubber-grade zinc oxide (ZnO) powder was used as the targeted materials to study its UVA photoresponse as well as its antibacterial function. ZnO powder was synthesized using French process. The morphological structures of the samples were investigated using field emission scanning electron microscopy and transmission electron microscopy. The dominant morphology of the sample was micro/nanoplate. The optical bandgap of the ZnO sample is 3.19 eV based on the UV-Visible measurement. Current-voltage measurement was conducted to study the effect of UVA (390 nm) illumination on the photoconductivity of the ZnO pellet. Photoconductivity was observed to increase significantly under UVA exposure due to light absorption on the surface of ZnO to raise the electrons across the bandgap. The current response of the UVA-induced also revealed the small persistent photoconductivity after the UVA light was turned off. Besides, higher voltage bias would lead to higher current flow under the same intensity of UVA exposure. According to the antibacterial test towards Staphylococcus aureus, the percentage inhibition of the bacterial after 24 h incubation increase when the concentration of ZnO suspension increases. The UVA illumination had improved the inhibition of the bacterial growth. This is due to the excitation of ZnO and increasing of free charge carriers in the solution, leading to potential distortion to the membrane surface of the bacteria. ZnO powder performed high absorption of UVA and they are not only can be used to block the UVA sunlight, but also have higher antibacterial capability under UVA excitation.

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Tsay, Chien-Yie, Shih-Ting Chen et Man-Ting Fan. « Solution-Processed Mg-Substituted ZnO Thin Films for Metal-Semiconductor-Metal Visible-Blind Photodetectors ». Coatings 9, n^o 4 (25 avril 2019) : 277. http://dx.doi.org/10.3390/coatings9040277.

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The effects of Mg on the microstructural, optical, and electrical properties of sol-gel derived ZnO transparent semiconductor thin films and the photoelectrical properties of photodetectors based on MgxZn1−xO (where x = 0 to 0.3) thin films with the metal-semiconductor-metal (MSM) configuration were investigated in this study. All the as-synthesized ZnO-based thin films had a single-phase wurtzite structure and showed high average transmittance of 91% in the visible wavelength region. The optical bandgap of MgxZn1−xO thin films increased from 3.25 to 3.56 eV and the electrical resistivity of the films rose from 6.1 × 102 to 1.4 × 104 Ω·cm with an increase in Mg content from x = 0 to x = 0.3. Compared with those of the pure ZnO thin film, the PL emission peaks of the MgZnO thin films showed an apparent blue-shift feature in the UV and visible regions. The photo-detection capability was investigated under visible, UVA, and UVC light illumination. Linear I-V characteristics were obtained in these ZnO-based photodetectors under dark and light illumination conditions, indicating an ohmic contact between the Au electrodes and ZnO-based thin films. It was found that the pure ZnO photodetector exhibited the best photoconductivity gain, percentage of sensitivity, and responsivity under UVA illumination. Under UVC illumination, the photoconductivity gain and percentage of sensitivity of the MgZnO photodetectors were better than those of the pure ZnO photodetector.

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Sabry, Raad S., et Amel D. Hussein. « Nanogenerator based on nanocomposites PVDF/ZnO with different concentrations ». Materials Research Express 6, n^o 10 (20 septembre 2019) : 105549. http://dx.doi.org/10.1088/2053-1591/ab4296.

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Tan, Thian Khoon, PoiSim Khiew, WeeSiong Chiu et ChinHua Chia. « Simple fabrication of magnetically separable ZnO-based photocatalyst nanocomposites ». IOP Conference Series : Materials Science and Engineering 744 (10 février 2020) : 012020. http://dx.doi.org/10.1088/1757-899x/744/1/012020.

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Faraji, Naser, et Zahra Hajimahdi. « Synthesis, characterisation, and antimicrobial activity of ZnO‐based nanocomposites ». Micro & ; Nano Letters 13, n^o 12 (décembre 2018) : 1667–71. http://dx.doi.org/10.1049/mnl.2018.5202.

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Sathiya, S. M., Gunadhor S. Okram, S. Maria Dhivya, Subramanian Mugesh, Maruthamuthu Murugan et M. A. Jothi Rajan. « Synergistic Bactericidal Effect of Chitosan/Zinc Oxide Based Nanocomposites Against Staphylococcus aureus ». Advanced Science Letters 24, n^o 8 (1 août 2018) : 5537–42. http://dx.doi.org/10.1166/asl.2018.12144.

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The biocompatible Chitosan/Zinc oxide (CS/ZnO) nanocomposites (NCs) material was synthesized via a simple and versatile microwave assisted wet synthesis method. After the incorporation of CS in the ZnO nanoparticles (NPs), the crystalline structure of the modified NPs was retained in the NCs and it was clearly exposed in the X-ray diffraction (XRD) measurements. The Zeta potential measurement of CS/ZnO nanocomposites (NCs) shows more stability than ZnO NPs. The Field Emission Scanning Electron Microscopy (FE-SEM) measurements depict the formation of cauliflower like structure after the integration of CS in the ZnO NPs. The interaction between ZnO molecules in CS becomes more compact and is confirmed in the Fourier Transform Infrared Spectroscopy (FTIR) measurement. Bacterial activity was increased gradually with the CS/ZnO content and was analytically stronger against Gram-positive cells. This study has conclusively proved that reactive oxygen species (ROS) such as •OH, •O2− , and H2O2 were significantly produced from aqueous suspension of CS/ZnO and were primarily responsible for the bactericidal activity.

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Miao, Yuxin, Guofeng Pan, Caixuan Sun, Ping He, Guanlong Cao, Chao Luo, Li Zhang et Hongliang Li. « Enhanced photoelectric responses induced by visible light of acetone gas sensors based on CuO-ZnO nanocomposites at about room temperature ». Sensor Review 38, n^o 3 (18 juin 2018) : 311–20. http://dx.doi.org/10.1108/sr-08-2017-0158.

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PurposeThe purpose of this paper is to study the effect of doping, annealing temperature and visible optical excitation on CuO-ZnO nanocomposites’ acetone sensing properties and introduce an attractive candidate for acetone detection at about room temperature.Design/methodology/approachZnO nanoparticles doped with CuO were prepared by sol-gel method, and the structure and morphology were characterized via X-ray diffraction, scanning electron microscope, energy dispersive spectroscopy and Brunauer-Emmett-Teller. The photoelectric responses of CuO-ZnO nanocomposites to cetone under the irradiation of visible light were investigated at about 30°C. The photoelectric response mechanism was also discussed with the model of double Schottky.FindingsThe doping of CuO enhanced performance of ZnO nanoparticles in terms of the photoelectric responses and the gas response and selectivity to acetone of ZnO nanoparticles, in addition, decreasing the operating temperature to about 30ºC. The optimum performance was obtained by 4.17% CuO-ZnO nanocomposites. Even at the operating temperature, about 30ºC, the response to 1,000 ppm acetone was significantly increased to 579.24 under the visible light irradiation.Practical implicationsThe sensor fabricated by 4.17% CuO-ZnO nanocomposites exhibited excellent acetone-sensing characteristics at about 30ºC. It is promising to be applied in low power and miniature acetone gas sensors.Originality/valueIn the present research, a new nanocomposite material of CuO-ZnO was prepared by Sol-gel method. The optimum gas sensing properties to acetone were obtained by 4.17% CuO-ZnO nanocomposites at about 30ºC operating temperature when it was irradiated by visible light with the wavelength more than 420 nm.

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Jeong, Sehee, et Seong-Ju Park. « Enhanced Electrical Transport and Photoconductivity of ZnO/ZnS Core/Shell Nanowires Based on Piezotronic and Piezo-Phototronic Effects ». Applied Sciences 12, n^o 17 (23 août 2022) : 8393. http://dx.doi.org/10.3390/app12178393.

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We report a significant enhancement in the electrical transport and photoconductivity of ZnO/ZnS core/shell nanowires (NWs) compared to those of ZnO NWs via the application of compressive strain. Under a compressive strain of −0.15%, the output current of the ZnO/ZnS core/shell NWs increases by 91.1% compared to that under the no-strain condition, whereas that of the ZnO NWs under the same condition is 42.7%. The significant increase in the output current of the ZnO/ZnS core/shell NWs is attributed to the type-II band alignment and strain-induced piezopotential changes at the junction interface, which induce a reduction in the barrier height to enable efficient charge carrier transport. Furthermore, under UV illumination and a compressive strain of −0.15%, although the photocurrent of the ZnO/ZnS core/shell NWs increases by 4.5 times compared to that of the ZnO NWs, the relative increase in the photocurrent of the ZnO/ZnS core/shell NWs is 11.7% compared to that under the no-strain condition, while the photocurrent of the ZnO NWs increases by 32.3% under the same condition. A decrease in the increase rate in the photocurrent of the ZnO/ZnS core/shell NWs with a change in strain under UV light compared to that under the dark condition can be explained by the piezoelectric screening effect induced by photogenerated carriers. By calculating the change in the Schottky barrier height (SBH), we demonstrate that the piezoelectric potential with a change in strain decreased the SBH, thus increasing the current level. Lastly, we propose a mechanism of the piezotronic and piezo-phototronic effects under applied strain and their effects on energy-band diagrams.

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Jha, Pankaj Kumar, Chamorn Chawengkijwanich, Chonlada Pokum, Pichai Soisan et Kuaanan Techato. « Antibacterial Activities of Biosynthesized Zinc Oxide Nanoparticles and Silver-Zinc Oxide Nanocomposites using Camellia Sinensis Leaf Extract ». Trends in Sciences 20, n^o 3 (15 janvier 2023) : 5649. http://dx.doi.org/10.48048/tis.2023.5649.

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Green route of nanomaterials synthesis is increasing in demand due to ecofriendly to the environment. In this research, objective is to biosynthesize and evaluate the antibacterial performance of pure ZnO and Ag/ZnO nanocomposites using Camellia sinensis leaf extracts. Pure ZnO nanoparticles and Ag/ZnO nanocomposites were synthesized using Camellia sinensis leaf extract. The antibacterial effectiveness against gram-positive (Staphylococcus aureus) and gram-negative (Escherichia coli) bacteria were examined and compared with 1 % Chlorox as a commercial disinfectant by well diffusion method based on the zone of inhibition. Pure ZnO nanoparticles and Ag/ZnO nanocomposites had hexagonal shape ZnO nanoparticles and rectangular shape Ag nanoparticles in Ag/ZnO nanocomposites with a particle crystal size between 20 - 30 nm with carboxylic and phenolic functional group attached on it. Ag/ZnO nanocomposites exhibited antibacterial effectiveness against both gram-positive and gram-negative bacteria, while pure ZnO nanoparticles exhibited antibacterial effectiveness against only gram-positive bacteria. Conversely, 1 % Chlorox and 1 % DMSO showed no significant antibacterial activity against gram-positive and gram-negative bacteria. Camellia sinensis mediated ZnO and Ag/ZnO nanoparticles showed antibacterial potential against S. aureus and E. coli suggesting that green route to synthesis of antibacterial nanoparticles can be an excellent strategy to develop eco-friendly disinfectant products HIGHLIGHTS Zinc oxide nanocomposites biosynthesis by Camellia sinensis at low pH, Antibacterial properties of ZnO nanoparticles and Ag/ZnO nanocomposites on Escherichia coli ATCC 8739 and Staphylococcus aureus ATCC 6538P strains, Disinfection application. GRAPHICAL ABSTRACT

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Beinik, Igor, Markus Kratzer, Astrid Wachauer, Lin Wang, Yuri P. Piryatinski, Gerhard Brauer, Xin Yi Chen, Yuk Fan Hsu, Aleksandra B. Djurišić et Christian Teichert. « Photoresponse from single upright-standing ZnO nanorods explored by photoconductive AFM ». Beilstein Journal of Nanotechnology 4 (21 mars 2013) : 208–17. http://dx.doi.org/10.3762/bjnano.4.21.

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Background: ZnO nanostructures are promising candidates for the development of novel electronic devices due to their unique electrical and optical properties. Here, photoconductive atomic force microscopy (PC-AFM) has been applied to investigate transient photoconductivity and photocurrent spectra of upright-standing ZnO nanorods (NRs). With a view to evaluate the electronic properties of the NRs and to get information on recombination kinetics, we have also performed time-resolved photoluminescence measurements macroscopically. Results: Persistent photoconductivity from single ZnO NRs was observed for about 1800 s and was studied with the help of photocurrent spectroscopy, which was recorded locally. The photocurrent spectra recorded from single ZnO NRs revealed that the minimum photon energy sufficient for photocurrent excitation is 3.1 eV. This value is at least 100 meV lower than the band-gap energy determined from the photoluminescence experiments. Conclusion: The obtained results suggest that the photoresponse in ZnO NRs under ambient conditions originates preferentially from photoexcitation of charge carriers localized at defect states and dominates over the oxygen photodesorption mechanism. Our findings are in agreement with previous theoretical predictions based on density functional theory calculations as well as with earlier experiments carried out at variable oxygen pressure.

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Abebe, Buzuayehu, et H. C. Ananda Murthy. « Insights into ZnO-based doped porous nanocrystal frameworks ». RSC Advances 12, n^o 10 (2022) : 5816–33. http://dx.doi.org/10.1039/d1ra09152b.

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The synthesis of doped nanocomposites under the control of surfactants has outstanding potential for the photocatalytic degradation of dyes and antibacterial activity. 4D-STEM detector mode gathers real-space atomic-resolution images with high-speed and efficient detection.

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Platonov, Vadim B., Marina N. Rumyantseva, Alexander S. Frolov, Alexey D. Yapryntsev et Alexander M. Gaskov. « High-temperature resistive gas sensors based on ZnO/SiC nanocomposites ». Beilstein Journal of Nanotechnology 10 (26 juillet 2019) : 1537–47. http://dx.doi.org/10.3762/bjnano.10.151.

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Increasing requirements for environmental protection have led to the need for the development of control systems for exhaust gases monitored directly at high temperatures in the range of 300–800 °C. The development of high-temperature gas sensors requires the creation of new materials that are stable under these conditions. The stability of nanostructured semiconductor oxides at high temperature can be enhanced by creating composites with highly dispersed silicon carbide (SiC). In this work, ZnO and SiC nanofibers were synthesized by electrospinning of polymer solutions followed by heat treatment, which is necessary for polymer removal and crystallization of semiconductor materials. ZnO/SiC nanocomposites (15–45 mol % SiC) were obtained by mixing the components in a single homogeneous paste with subsequent thermal annealing. The composition and microstructure of the materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The electrophysical and gas sensing properties of the materials were investigated by in situ conductivity measurements in the presence of the reducing gases CO and NH3 (20 ppm), in dry conditions (relative humidity at 25 °C RH25 = 0) and in humid air (RH25 = 30%) in the temperature range 400–550 °C. The ZnO/SiC nanocomposites were characterized by a higher concentration of chemisorbed oxygen, higher activation energy of conductivity, and higher sensor response towards CO and NH3 as compared with ZnO nanofibers. The obtained experimental results were interpreted in terms of the formation of an n–n heterojunction at the ZnO/SiC interface.

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Farha, Ashraf H., Abdullah F. Al Naim et Shehab A. Mansour. « Thermal Degradation of Polystyrene (PS) Nanocomposites Loaded with Sol Gel-Synthesized ZnO Nanorods ». Polymers 12, n^o 9 (27 août 2020) : 1935. http://dx.doi.org/10.3390/polym12091935.

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Thermal degradation of polystyrene/ZnO (PS/ZnO) nanocomposites was investigated in this study. PS/ZnO polymer nanocomposites were prepared by using ZnO nanorods as nanofillers that were prepared via the sol-gel route. The as-prepared ZnO nanoparticles showed nanocrystallites in rod-like shapes with a non-uniform hexagonal cross-section and diameter varying from 40 to 75 nm. PS/ZnO nanocomposites with ZnO nanoparticles content ranging from 0–3 wt% are prepared via the common casting method. Even dispersion for ZnO nanoparticles within as-prepared PS/ZnO nanocomposites was verified through SEM/EDX measurements. Thermal degradation of the samples was checked by using the thermogravimetric (TG) analysis and differential scanning calorimetry (DSC) under non-isothermal conditions and a constant heating rate of 10 °C min. The thermal stability of the nanocomposite is elevated compared to that of pristine PS due to the addition of the ZnO nanoparticles. The homogeneity of the PS/ZnO nanocomposites is verified by systematic increases in thermal degradation with increasing ZnO content. The characterization degradation temperatures at different weight loss percentages of ZnO nanoparticles increase at high ZnO wt%. Static activation energy of decomposing is based on TGA data. Activation energies showed some enhancement after the addition of ZnO nanorods into the PS matrix. Enhancing the thermal stability of PS with ZnO addition within the investigated ZnO concentration range is verified by TG, DSC results.

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Wang, Weiying, Jie Liu, Xibin Yu et Guangqian Yang. « Transparent Poly(methyl methacrylate)/ZnO Nanocomposites Based on KH570 Surface Modified ZnO Quantum Dots ». Journal of Nanoscience and Nanotechnology 10, n^o 8 (1 août 2010) : 5196–201. http://dx.doi.org/10.1166/jnn.2010.2223.

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Wu, Di, et Ali Akhtar. « Ppb-Level Hydrogen Sulfide Gas Sensor Based on the Nanocomposite of MoS2 Octahedron/ZnO-Zn2SnO4 Nanoparticles ». Molecules 28, n^o 7 (4 avril 2023) : 3230. http://dx.doi.org/10.3390/molecules28073230.

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Hydrogen sulfide (H2S) detection is extremely necessary due to its hazardous nature. Thus, the design of novel sensors to detect H2S gas at low temperatures is highly desirable. In this study, a series of nanocomposites based on MoS2 octahedrons and ZnO-Zn2SnO4 nanoparticles were synthesized through the hydrothermal method. Various characterizations such as X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectrum (XPS) have been used to verify the crystal phase, morphology and composition of synthesized nanocomposites. Three gas sensors based on the nanocomposites of pure ZnO-Zn2SnO4 (MS-ZNO-0), 5 wt% MoS2-ZnO-Zn2SnO4 (MS-ZNO-5) and 10 wt% MoS2-ZnO-Zn2SnO4 (MS-ZNO-10) were fabricated to check the gas sensing properties of various volatile organic compounds (VOCs). It showed that the gas sensor of (MS-ZNO-5) displayed the highest response of 4 to 2 ppm H2S and fewer responses to all other tested gases at 30 °C. The sensor of MS-ZNO-5 also displayed humble selectivity (1.6), good stability (35 days), promising reproducibility (5 cycles), rapid response/recovery times (10 s/6 s), a limit of detection (LOD) of 0.05 ppm H2S (Ra/Rg = 1.8) and an almost linear relationship between H2S concentration and response. Several elements such as the structure of MoS2, higher BET-specific surface area, n-n junction and improvement in oxygen species corresponded to improving response.

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Yaqoob, Asim Ali, Nur Habibah binti Mohd Noor, Albert Serrà et Mohamad Nasir Mohamad Ibrahim. « Advances and Challenges in Developing Efficient Graphene Oxide-Based ZnO Photocatalysts for Dye Photo-Oxidation ». Nanomaterials 10, n^o 5 (12 mai 2020) : 932. http://dx.doi.org/10.3390/nano10050932.

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The efficient remediation of organic dyes from wastewater is increasingly valuable in water treatment technology, largely owing to the tons of hazardous chemicals currently and constantly released into rivers and seas from various industries, including the paper, pharmaceutical, textile, and dye production industries. Using solar energy as an inexhaustible source, photocatalysis ranks among the most promising wastewater treatment techniques for eliminating persistent organic pollutants and new emerging contaminants. In that context, developing efficient photocatalysts using sunlight irradiation and effectively integrating them into reactors, however, pose major challenges in the technologically relevant application of photocatalysts. As a potential solution, graphene oxide (GO)-based zinc oxide (ZnO) nanocomposites may be used together with different components (i.e., ZnO and GO-based materials) to overcome the drawbacks of ZnO photocatalysts. Indeed, mounting evidence suggests that using GO-based ZnO nanocomposites can promote light absorption, charge separation, charge transportation, and photo-oxidation of dyes. Despite such advances, viable, low-cost GO-based ZnO nanocomposite photocatalysts with sufficient efficiency, stability, and photostability remain to be developed, especially ones that can be integrated into photocatalytic reactors. This article offers a concise overview of state-of-the-art GO-based ZnO nanocomposites and the principal challenges in developing them.

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FANG, YONGLING, ZHONGYU LI, SONG XU, DANAN HAN et DAYONG LU. « FABRICATION OF SQUARAINE DYE SENSITIZED SPHERICAL ZINC OXIDE NANOCOMPOSITES AND THEIR VISIBLE-LIGHT INDUCED PHOTOCATALYTIC ACTIVITY ». Nano 09, n^o 03 (avril 2014) : 1450036. http://dx.doi.org/10.1142/s1793292014500362.

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A 1,3-bis[(3,3-dimethylindolin-2-ylidene)methyl]squaraine (ISQ) dye sensitized ZnO nanocomposites via two different preparation methods including hydrothermal and ultrasonic sensitization processes are discussed in this paper. The as-prepared composites were characterized by the X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), Raman spectroscopy, and transmission electron microscopy (TEM). Based on the XRD patterns and TEM images, the ISQ/ ZnO nanocomposites still kept the characteristic peaks and the basic morphology of ZnO and ISQ dye. The photocatalytic activity of ISQ/ ZnO nanocomposites was investigated by degrading methylene blue (MB) under visible-light illumination. Compared with the MB self-degradation rate, the photocatalytic activity of the ISQ/ ZnO composites was enhanced remarkably. The ISQ/ ZnO nanocomposites fabricated by ultrasonic sensitization method exhibited excellent photocatalytic degradation rate, approximately 20% higher than that of the hydrothermal sensitization one.

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Dev G., Sarang, Vikas Sharma, Ashish Singh, Vidushi Singh Baghel, Masatoshi Yanagida, Atsuko Nagataki et Neeti Tripathi. « Raman spectroscopic study of ZnO/NiO nanocomposites based on spatial correlation model ». RSC Advances 9, n^o 46 (2019) : 26956–60. http://dx.doi.org/10.1039/c9ra04555d.

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Joshi, Hira, et S. Annapoorni. « Tuning Optical Properties in Nanocomposites ». International Journal of Nanoscience 19, n^o 04 (12 février 2020) : 1950026. http://dx.doi.org/10.1142/s0219581x19500261.

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Metal nanostructures and noble metal-based nanostructures, in particular, exhibit plasmonic resonance in the visible region. The resonance absorption can be tuned by varying the size of nanoparticle and the external matrix in which the plasmonic materials are embedded. Mie’s theory has been used to demonstrate the shift in the plasmonic resonance in gold nanoparticles embedded in different dielectric media. Two model systems, viz. Au–ZnO and Au–Al2O3, prepared by sputtering on quartz substrates were used to study the optical absorption. The plasmonic peaks were observed to be red shifted in Au–Al2O3 and Au–ZnO, as is also supported by Mie formalism. The dielectric constant of the external matrix viz., Al2O3 and ZnO, estimated using the experimental and the Mie simulations are 3.05 and 1.83, respectively.

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Seitov, Bekbolat, Sherzod Kurbanbekov, Dina Bakranova, Nuriya Abdyldayeva et Nurlan Bakranov. « Study of the Photoelectrochemical Properties of 1D ZnO Based Nanocomposites ». Catalysts 11, n^o 10 (13 octobre 2021) : 1235. http://dx.doi.org/10.3390/catal11101235.

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Exploitation of common elements as photocatalysts for conversion of photons to electricity stimulates the development of a green energy strategy. In this paper, methods for the preparation of active coatings based on ZnO/Ag/CdS, which are used in the photocatalytic oxidation reaction, are examined. The physical and chemical properties of the resulting arrays were studied using optical spectrometers, an electron microscope, an X-ray diffractometer, and potentiostatic measurements and electrochemical impedance spectroscopy. The effectiveness of photocatalysts was calculated by the ability to liberate gas from aqueous solutions when exposed to light. The rate of degradation was indirectly measured with a conductometer.

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Platonov, Rumyantseva et Gaskov. « High Temperature Resistive Gas Sensors Based on ZnO/SiC Nanocomposites ». Proceedings 14, n^o 1 (19 juin 2019) : 36. http://dx.doi.org/10.3390/proceedings2019014036.

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Utari, Listya, Ni Luh Wulan Septiani, Suyatman, Nugraha, Levy Olivia Nur, Hutomo Suryo Wasisto et Brian Yuliarto. « Wearable Carbon Monoxide Sensors Based on Hybrid Graphene/ZnO Nanocomposites ». IEEE Access 8 (2020) : 49169–79. http://dx.doi.org/10.1109/access.2020.2976841.

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Belhaj, Marwa, Cherif Dridi, Habib Elhouichet et Jean Cristophe Valmalette. « Study of ZnO nanoparticles based hybrid nanocomposites for optoelectronic applications ». Journal of Applied Physics 119, n^o 9 (7 mars 2016) : 095501. http://dx.doi.org/10.1063/1.4942525.

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