Relevant bibliographies by topics / Photocatalytic organic

Academic literature on the topic 'Photocatalytic organic'

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Published: 6 September 2023

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Journal articles on the topic "Photocatalytic organic"

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López-Magano, Alberto, Alicia Jiménez-Almarza, Jose Alemán, and Rubén Mas-Ballesté. "Metal–Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs) Applied to Photocatalytic Organic Transformations." Catalysts 10, no. 7 (June 27, 2020): 720. http://dx.doi.org/10.3390/catal10070720.

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Among the different alternatives for catalysis using metal–organic frameworks (MOFs) or covalent organic frameworks (COFs), photocatalysis has remarkably evolved during the last decade. Photocatalytic reticular materials allowed recyclability and easy separation of catalyst from the product, also reaching the activity and selectivity commonly observed for molecular systems. Recently, photocatalytic MOFs and COFs have been applied to synthetic applications in order to obtain organic molecules of different complexity. However, although a good number of works have been devoted to this issue, an updated comprehensive revision on this field is still needed. The aim of this review was to fill this gap covering the following three general aspects: (1) common strategies on the design of reticular photocatalytic materials, (2) a comprehensive discussion of the photocatalytic organic reactions achieved by the use of COFs and MOFs, and (3) some critical considerations highlighting directions that should be considered in order to make advances in the study of photocatalytic COFs and MOFs.
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Xu, Jie. "Metal-Organic Frameworks for Photocatalytic Degradation of Organic Wastewater." Highlights in Science, Engineering and Technology 6 (July 27, 2022): 1–8. http://dx.doi.org/10.54097/hset.v6i.927.

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Environmental problems, including garbage disposal, land desertification, water pollution, and sand disaster, especially water pollution, should be faced seriously by human beings. Photocatalysis technology has been increasingly playing a dominant role in treating organic wastewater. This paper will introduce the degradation of organic wastewater using metal-organic framework (MOF) materials photocatalytic technology. This paper will summarize the related articles and research results published by the previous generation. This paper will introduce the material characteristics of MOFs and the physical and chemical properties of the materials and then will present the advantages of MOF materials in the photocatalytic degradation of organic wastewater. The working principle of MOFs for photocatalytic degradation of organic wastewater and the method of making MOF materials will be introduced. At the end of the article, the results of previous research in this field in recent years will be presented.
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CHEN, CHUANSHENG, QUN FANG, SHIYI CAO, and YONGXIANG YAN. "PHOTOCATALYTIC PROPERTY AND PHOTOCATALYTIC MECHANISM OF TiO2/Fe2O3 HYBRIDS FOR DEGRADATION OF ORGANIC DYES." Surface Review and Letters 26, no. 05 (June 2019): 1850196. http://dx.doi.org/10.1142/s0218625x18501962.

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In order to consider the performance enhancement and feasibility of practical application, this research work discussed the effects of different ions on the photocatalytic activity of TiO2/Fe2O3 hybrids in detail, involving H[Formula: see text], OH−, NH[Formula: see text], and NO[Formula: see text]. The TiO2/Fe2O3 hybrids were prepared by organic electrolyte-assisted sol–gel method under UV irradiation, and their function mechanisms were analyzed. Experiment results show that the resultant TiO2/Fe2O3 hybrids possess excellent photocatalytic activity and photocatalytic stability for degradation of organics under acid condition (pH 2–8). Notably, the NO[Formula: see text] ions could accelerate degradation of rhodamine B and methyl orange, and the recyclability of TiO2/Fe2O3 hybrids can be greatly enhanced in the co-existence of NO[Formula: see text] and NH[Formula: see text]. Meanwhile, this symbiosis of NO[Formula: see text] and NH[Formula: see text] is proven able to buffer the solution pH in photocatalysis. Furthermore, the prominent photocatalytic activity of TiO2/Fe2O3 hybrids for organic pollutants was mainly attributed to the formation of hydroxyl radicals (OH). The synthetic products show great potential applications in purification of air or wastewater that contains ammonia-nitrogen molecules.
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Zhang, P., and L. Jian. "Ozone-enhanced photocatalytic degradation of natural organic matter in water." Water Supply 6, no. 3 (July 1, 2006): 53–61. http://dx.doi.org/10.2166/ws.2006.730.

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Ozone-enhanced photocatalytic degradation of macromolecular natural organic matter (NOM) in drinking water source was investigated. The influences of ozone dosage, retention time and bicarbonate concentration on the NOM degradation rate were studied. The change of molecular weight distribution of NOM caused by ozone-enhanced photocatalysis was analysed, as well as the degradation rate of NOM with different molecular weight (MW). It was shown that ozone-enhanced photocatalysis was much better for NOM degradation than sole ozonation or photocatalysis. Increase of both ozone dosage and retention time could effectively increase the TOC removal rate, while biodegradability could be improved solely by an increase in ozone dosage. The existence of bicarbonate significantly reduced the photocatalytic degradation rate of NOM; however, its impact was effectively offset by the addition of ozone into the photocatalytic process. Macromolecular NOM was transformed into smaller molecules, and the larger NOM was mineralized by ozone-enhanced photocatalysis much faster than the smaller NOM.
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Muthukumaran, Shobha, Lili Song, Bo Zhu, Darli Myat, Jin-Yuan Chen, Stephen Gray, and Mikel Duke. "UV/TiO2 photocatalytic oxidation of recalcitrant organic matter: effect of salinity and pH." Water Science and Technology 70, no. 3 (May 27, 2014): 437–43. http://dx.doi.org/10.2166/wst.2014.221.

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Photocatalytic oxidation processes have interest for water treatment since these processes can remove recalcitrant organic compounds and operate at mild conditions of temperature and pressure. However, performance under saline conditions present in many water resources is not well known. This study aims to explore the basic effects of photocatalysis on the removal of organic matter in the presence of salt. A laboratory-scale photocatalytic reactor system, employing ultraviolet (UV)/titanium dioxide (TiO2) photocatalysis was evaluated for its ability to remove the humic acid (HA) from saline water. The particle size and zeta potential of TiO2 under different conditions including solution pH and sodium chloride (NaCl) concentrations were characterized. The overall degradation of organics over the NaCl concentration range of 500–2,000 mg/L was found to be 80% of the non-saline equivalent after 180 min of the treatment. The results demonstrated that the adsorption of HA onto the TiO2 particles was dependent on both the pH and salinity due to electrostatic interaction and highly unstable agglomerated dispersion. This result supports UV/TiO2 as a viable means to remove organic compounds, but the presence of salt in waters to be treated will influence the performance of the photocatalytic oxidation process.
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Du, Zhehua. "Research progress of MOF/Bismuth-based semiconductor composites in photocatalytic technology." E3S Web of Conferences 385 (2023): 04034. http://dx.doi.org/10.1051/e3sconf/202338504034.

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Photocatalysis has significant potential for environmental remediation and energy conversion, with a focus on designing and developing highly efficient photocatalysts. Composite materials consisting of bismuth-based semiconductors and metal-organic frameworks (MOFs) exhibit outstanding photocatalytic activity, and have garnered significant attention from researchers as a highly sought-after material. A review is conducted on recent advances in MOF/bismuth-based semiconductor composites. On this basis, the synthesis methods of MBCs are described in detail, and then the applications of MBCs in organic pollutant degradation, Cr (VI) reduction, water (H2O) splitting, nitrogen (N2) fixation discussed. Finally, this paper highlights the current challenges in photocatalysis using MBCs and provides insights into the future development direction for MBCs photocatalysis technology. The preparation and modification methods of MBCs, the improvement of photocatalytic efficiency, the mechanism of oxidative degradation of organic matter and the mechanism of photocatalytic complete hydrolysis of water need further study.
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Aslam, Mohammad, Dawood Bin Fazal, Faizan Ahmad, Abdullah Bin Fazal, Ahmad Zuhairi Abdullah, Mukhtar Ahmed, Mohammad Qamar, and Mohd Rafatullah. "Photocatalytic Degradation of Recalcitrant Pollutants of Greywater." Catalysts 12, no. 5 (May 18, 2022): 557. http://dx.doi.org/10.3390/catal12050557.

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These days, many countries have a water shortage and have limited access to clean water. To overcome this, a new treatment is emerging, namely, the photocatalytic processing of greywater. Photocatalytic processes to remove the organic matter from different greywater sources are critically reviewed. Their efficiency in degrading the organic matter in greywater is scrutinized along with factors that can affect the activity of photocatalysts. Modified TiO2, ZnO and TiO2 catalysts show great potential in degrading organic materials that are present in greywater. There are several methods that can be used to modify TiO2 by using sol-gel, microwave and ultrasonication. Overall, the photocatalytic approach alone is not efficient in mineralizing the organic compounds, but it works well when the photocatalysis is combined with oxidants and Fe3+. However, factors such as pH, concentration and catalyst-loading of organic compounds can significantly affect photocatalytic efficiency.
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Escobedo, Salvador, and Hugo de Lasa. "Photocatalysis for Air Treatment Processes: Current Technologies and Future Applications for the Removal of Organic Pollutants and Viruses." Catalysts 10, no. 9 (August 24, 2020): 966. http://dx.doi.org/10.3390/catal10090966.

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Photocatalysis for air treatment or photocatalytic oxidation (PCO) is a relatively new technology which requires titanium dioxide (TiO2) and a source of light (Visible or near-UV) to degrade pollutants contained in air streams. Present approaches for the photodegradation of indoor pollutants in air streams aim to eliminate volatile organic compounds (VOCs) and viruses, which are both toxic and harmful to human health. Photocatalysis for air treatment is an inexpensive and innovative green process. Additionally, it is a technology with a reduced environmental footprint when compared to other conventional air treatments which demand significant energy, require the disposal of used materials, and release CO2 and other greenhouse gases to the environment. This review discusses the most current and relevant information on photocatalysis for air treatment. This article also provides a critical review of (1) the most commonly used TiO2-based semiconductors, (2) the experimental syntheses and the various photocatalytic organic species degradation conversions, (3) the developed kinetics and computational fluid dynamics (CFD) and (4) the proposed Quantum Yields (QYs) and Photocatalytic Thermodynamic Efficiency Factors (PTEFs). Furthermore, this article contains important information on significant factors affecting the photocatalytic degradation of organic pollutants, such as reactor designs and type of photoreactor irradiation. Overall, this review describes state-of-the-art photocatalysis for air treatment to eliminate harmful indoor organic molecules, reviewing as well the potential applications for the inactivation of SARS-CoV2 (COVID-19) viruses.
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Yi, Yan, Siyu Wang, Hantang Zhang, Jie Liu, Xiuqiang Lu, Lang Jiang, Chengji Sui, Hai Fan, Shiyun Ai, and Jianwu Sun. "High mobility organic semiconductor for constructing high efficiency carbon nitride heterojunction photocatalysts." Journal of Materials Chemistry C 8, no. 48 (2020): 17157–61. http://dx.doi.org/10.1039/d0tc05123c.

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High-mobility organic semiconductor CuPc is used to construct CN/CuPc heterojunction photocatalysts, showing enhanced photocatalytic performances. This work proves the prospect of high-mobility organic semiconductors in photocatalysis.
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Santaclara, J. G., F. Kapteijn, J. Gascon, and M. A. van der Veen. "Understanding metal–organic frameworks for photocatalytic solar fuel production." CrystEngComm 19, no. 29 (2017): 4118–25. http://dx.doi.org/10.1039/c7ce00006e.

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The fascinating chemical and physical properties of MOFs have recently stimulated exploration of their application for photocatalysis. Design guidelines for these materials in photocatalytic solar fuel generation can be developed by applying the right spectroscopic tools.
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Dissertations / Theses on the topic "Photocatalytic organic"

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Kolář, Michal. "Degradation of organic pollutants employing various photocatalytic systems." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2008. http://tel.archives-ouvertes.fr/tel-00731166.

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La dégradation photoinduite du Monuron (herbicide) a été étudiée dans trois systèmes différents produisant des radicaux hydroxyle : en présence du complexe Fe(III)Cit, dans une suspension de TiO2 et dans un système combiné Fe(III)Cit / TiO2. Le but principal était d'améliorer l'efficacité photocatalytique. La spéciation et la photoactivité du complexe ont été déterminées en fonction du pH. La cinétique de dégradation du Monuron photoinduite par le complexe se fait en deux étapes avec deux sources successives de radicaux °OH : 1) photolyse du complexe ; 2) cycle photoredox du fer. La présence de TiO2 améliore l'efficacité du système Fe(III)Cit à pH acide alors qu'à pH neutre l'efficacité du système est complètement inhibée. La concentration en oxygène et le pH sont les facteurs clés en présence du complexe Fe(III)Cit. De plus, dans un système pilote utilisant du TiO2, l'influence d'un solvant organique lors de la dégradation du 4-chlorophénol en milieu aquatique a été examinée.
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Kolar, Michal. "Degradation of organic pollutants employing various photocatalytic systems." Clermont-Ferrand 2, 2008. http://www.theses.fr/2008CLF21885.

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La dégradation photoinduite du Monuron (herbicide) a été étudiée dans trois systèmes différents produisant des radicaux hydroxyle : en présence du complexe Fe(III)Cit, dans une suspension de TiO2 et dans un système combiné Fe(III)Cit / TiO2. Le but principal était d'améliorer l'efficacité photocatalytique. La spéciation et la photoactivité du complexe ont été déterminées en fonction du pH. La cinétique de dégradation du Monuron photoinduite par le complexe se fait en deux étapes avec deux sources successives de radicaux °OH : 1) photolyse du complexe ; 2) cycle photoredox du fer. La présence de TiO2 améliore l'efficacité du système Fe(III)Cit à pH acide alors qu'à pH neutre l'efficacité du système est complètement inhibée. La concentration en oxygène et le pH sont les facteurs clés en présence du complexe Fe(III)Cit. De plus, dans un système pilote utilisant du TiO2, l'influence d'un solvant organique lors de la dégradation du 4-chlorophénol en milieu aquatique a été examinée
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Wang, Yi. "Metal-organic and organic photosensitizers for photocatalytic hydrogen generation and carbon dioxide reduction." HKBU Institutional Repository, 2017. https://repository.hkbu.edu.hk/etd_oa/414.

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This thesis is focused on developing metal-organic and organic molecules for photocatalytic water splitting and carbon dioxide reduction. In chapter 1, an overview of hydrogen production, dye-sensitized solar cells and carbon dioxide reduction are provided. The development history and reaction mechanisms of catalytic systems are introduced along with the typical examples in each field. The applications of both metal-organic and organic compounds are covered. In chapter 2, nine molecular organic photosensitizers were designed and synthesized. The nine molecules were employed as the photosensitizing reagent in the fabrication of dye-sensitized solar cells and applied in photocatalytic water reduction via coupling with TiO2 semiconductors and Pt co-catalyst. The highest turnover number (TON) of 10200 was achieved by organic photosensitizer 1g for hydrogen generation. The effect of alkyl chains and triarylamine donor moiety to the photocatalytic performance was investigated. A shorter alkyl chain was found to favor the reaction due to a lower hydrophobicity which in turn may block the interaction between the photocatalyst and water molecules. Besides, the triarylamine donor units facilitated high hydrogen generation rates by reducing the contact between catalytic active sites and the oxidized form of sacrificial reagents. In chapter 3, five earth-abundant metal complexes were synthesized to serve as the catalyst and CdS nanorods (NRs) were prepared to be the photosensitizer for the photocatalytic water reduction. A cobalt dithiolene complex (2a) achieved a TON of 30635 in 20 h under the blue light irradiation at a concentration of 10 µM. A new complex 2c also gave a high TON of 12375 under the same conditions and its TON was further improved to 115213 in 87 h by reducing the concentration of catalyst by ten times. The size effect of CdS NRs was investigated and larger nanoparticles exhibited higher hydrogen production rates. In chapter 4, ten iridium(III) complexes were synthesized and used as dual-functional molecules in photocatalytic carbon dioxide reduction by acting as both the photosensitizing reagent as well as the catalyst. The best performance was achieved by 3j, giving a TON of 230 under the irradiation of blue LED. A push-pull effect brought by trifluoromethyl and methoxy group sucessfully enhanced the carbon dioxide reduction efficiency. The hydrophobicity of n-butyl chain also provided effective protection to the active sites of reaction intermediate. Additional steric hindrance was found to extend the lifespan of photocatalytic systems but led to a drop in the overall conversion efficiency. Chapter 5 summarizes the specific synthetic procedures and characterization parameters of the molecules in chapters 2-4.
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Hamill, Noel Anthony. "Photocatalytic destruction of dichlorobutenes in waste water treatment." Thesis, Queen's University Belfast, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322954.

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Lim, Leonard Lik Pueh. "In-situ photocatalytic remediation of organic contaminants in groundwater." Thesis, University of Cambridge, 2010. https://www.repository.cam.ac.uk/handle/1810/238767.

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This research is about the development of a photocatalytic reactor design, Honeycomb, for in-situ groundwater remediation. Photocatalysis, typically a pseudo first order advanced oxidation process, is initiated via the illumination of UVA light on the catalyst, i.e. titanium dioxide (TiO2). In the presence of oxygen, highly reactive oxidising agents are generated such as superoxide (O2-), hydroxyl (OH.-) radicals, and holes (hvb+) on the catalyst surface which can oxidise a wide range of organic compounds. The target contaminant is methyl tert butyl ether (MTBE), a popular gasoline additive in the past three decades, which gives the water an unpleasant taste and odour at 20 μg L-1, making it undrinkable. This research consists of three major parts, i.e. (i) establishing a suitable catalyst immobilisation procedure, (ii) characterisation and evaluation of reactor models and (iii) scale up studies in a sand tank. TiO2 does not attach well onto many surfaces. Therefore, the first step was to determine a suitable immobilisation procedure by preparing TiO2 films using several potential procedures and testing them under the same conditions, at small scale. The coatings were evaluated in terms of photocatalytic activity and adhesion. The photocatalytic activity of the coatings was tested using methylene blue dye (MB), which is a photocatalytic indicator. A hybrid coating, which comprises a sol gel solution enriched with Aeroxide TiO2 P25 powder, on woven fibreglass exhibited the best adhesion and photocatalytic activity among samples evaluated. Thus, it was used to produce immobilised catalyst for this research. Consequently, the immobilisation procedure was scaled up to synthesize TiO2 coatings for the potential photocatalytic reactor design. The photocatalytic activity of the coatings produced from the scaled up immobilisation procedure were reasonably comparable to that produced at small scale. Due to the UVA irradiation and mass transfer limitations, photocatalytic reactors are typically compact in order to maximise their efficiency to accommodate high flows, particularly in water and wastewater treatment. In the case of groundwater, however, the treatment area can span up to meters in width and depth. Groundwater flow is significantly lower than that of water treatment, as the reactor design does not need to be compact. Considering both factors, a photocatalytic reactor design of hexagonal cross-section (Honeycomb) was proposed, in which the structures can be arranged adjacent to each other forming a honeycomb. A model was constructed and tested in a 4 L column (cylindrical) reactor, using the MB test to characterise the reactor performance and operating conditions. This was followed by a hydraulic performance study, which encompasses single and double pass flow studies. The single pass flow study involves the photocatalytic oxidation (PCO) of MB and MTBE, while the double pass flow study was focused on the PCO of MTBE only. The double pass can simulate two serially connected reactors. Single pass flow studies found that the critical hydraulic residence time (HRT) for the PCO of MB and MTBE is approximately 1 day, achieving up to 84 % MTBE removal. Critical HRT refers to the minimum average duration for a batch of contaminant remaining in the reactor in order to maintain the potential efficiency of the reactor. Double pass studies showed the reactor can achieve up to 95 % MTBE removal in 48 hours, and that reactor performance in the field of serially connected reactors can be estimated by sequential order of single pass removal efficiency. In groundwater, there are likely to be other impurities present and the effects of groundwater constituents on the reactor efficiency were studied. The MTBE PCO rate is affected by the presence of organic compounds and dissolved ions mainly due to the competition for hydroxyl radicals and the deactivation of catalyst surface via adsorption of the more strongly adsorbed organic molecules and ions. Despite the presence of organic compounds and dissolved ions, the reactor achieved about 80 % MTBE removal in 48 hours. A double pass flow study showed that the overall efficiency of the photocatalytic reactor in the field can be estimated via sequential order of its efficiency in a single pass flow study using the actual groundwater sample in the laboratory. A sand tank was designed for the simulation of the clean up of an MTBE plume from a point source leakage using the 200 mm i.d. Honeycomb I prototype. Honeycomb I achieved up to 88.1 % MTBE removal when the contaminated groundwater flowed through (single pass) at 14.6 cm d-1. The critical HRT for Honeycomb I was also approximately 1 day, similar to that in the column reactor. The response of MTBE removal efficiency towards flow obtained in the column reactor and sand tank was generic, indicating that the reactor efficiency can be obtained via testing of the model in the column reactor. The presence of toluene, ethylbenzene and o-xylene (TEo-X) decreased the MTBE removal efficiency in both the sand tank and column reactor. The same set of catalyst and 15 W Philips Cleo UVA fluorescent lamp was operated for a total of about 582 h (24 d) out of the cumulative 1039 h (43 d) sand tank experiments, achieving an overall MTBE removal efficiency of about 76.2 %. The experiments in the column reactor and sand tank exhibited the reliability of the immobilised catalyst produced in this research. This research demonstrates the potential of Honeycomb for in-situ groundwater remediation and also proposes its fabrication and installation options in the field.
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Sommers, Jacob. "Towards Photocatalytic Overall Water Splitting via Small Organic Shuttles." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34607.

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This thesis studies the development of a new method for photochemical overall water splitting using a small organic shuttle. In Section 2, BiVO4, was studied to determine the CO2 reduction mechanism and how catalytic activity decays. BiVO4 catalysts were capable of producing a maximum of 200 μmol of methanol per gram of catalyst from CO2 in basic media, and later decomposed by BiVO4. The decay of BiVO4¬ was studied by x-ray diffraction and scanning electron microscopy, demonstrating reversible decomposition of BiVO4. BiVO4 is etched, leeching vanadium into solution, while nanoparticles of bismuth oxide are deposited on the surface of BiVO4. In Section 3, ferrocyanide salts, an aqueous, cheap, and abundant photocatalyst was used for the first time to dehydrogenate aqueous formaldehyde selectively into formate and hydrogen. The catalyst is capable of record turnovers and turnover frequencies for formaldehyde dehydrogenation catalysts. A preliminary mechanism was proposed from experimental and computational data.
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Ngwang, Helen Chonde. "Heterogeneous photocatalytic degradation studies of organic compounds in water." Thesis, Brunel University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393175.

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Bouleghlimat, Emir. "Materials for the photocatalytic treatment of recalcitrant organic waste." Thesis, Cardiff University, 2017. http://orca.cf.ac.uk/107678/.

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The photocatalytic degradation of cinnamic acid, by TiO2, has been studied extensively in aerobic and anaerobic conditions and in the presence of common salts often found in industrial waste waters. Analysis of the intermediates formed found that molecular oxygen is central to forming the important radicals for the main benzaldehyde mechanism by which cinnamic acid initially degrades, as well as a key component required for the mineralisation to carbon dioxide. In the absence of molecular oxygen an alternate, but slower, pathway becomes the prevalent. The hydroxyl driven mechanism is capable of decarboxylation of the initial carboxyl group but further oxidation does not occur at a reasonable rate. By investigating the effect of salts in solution we found that sulfates and chlorides both interfere with degradation mechanisms and decrease the mineralisation efficiency of titania photocatalysis. Sulfates blocked important surface sites needed for substrate binding that inhibited the benzaldehyde pathway and slowed down the degradation pathway. Whilst chloride formed radical chlorine species (Cl∙) in the presence of TiO2 that resulted in the increase of cinnamic acid removal and the emergence of new reaction pathways. Cl∙ competed with the superoxide radical anion (O2∙-) to attack across the double bond of cinnamic acid, decarboxylate and form several new acetophenone-derived intermediates. A widening of the intermediate map, through the formation of new intermediates, is coupled with a significant slowing of total mineralisation which presents real issues for photocatalytic waste water treatment where chloride ions are present. Additionally, the chlorine radical induced pathways produce intermediates of a greater toxicity; bringing the implication that partial oxidative degradation could result in waste water with an increased toxicity. Anodic nanotubes were explored as an option for alternative materials to be used within photocatalytic reactors. Nanotubes anodised for 8 hours were found to be the most photoactive in the liquid phase, and in the surface degradation of contaminants, due to the wider pores that were structurally sound enough to not slope and reduce light penetration. The surface topography was identified as the key factor for promoting photocatalysis. It was also found that the materials had a cross-phase applicability, in that the most active liquid phase nanotubes were also the most efficient for surface degradation. The incorporation of tungsten into the anodisation process did not improve the photocatalytic activity. Photodeposition of palladium and gold resulted in a decrease in the degradative efficiency of the nanotube arrays. Pd/TiO2 and Au/TiO2 powders were found to reduce the degradation rate of cinnamic acid in oxygenated conditions, although both metals improved the oxidation of surface deposits of carbon. In deoxygenated conditions, Pd/TiO2 catalysts exhibited superior degradation of cinnamic acid in comparison to plain TiO2 and gold doped catalysts. Enhancements in the mineralisation rates, to CO2, were also found. The improvements were attributed to the presence of palladium improving charge separation and introducing new reaction sites capable of decarboxylating the alcohol and aldehyde functionalities, respectively. While the gold nanoparticles were poorly dispersed, they were found to increase the selectivity for phenylacetaldehyde, in deoxygenated conditions, by a factor of 5.
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DAVYDOV, LEV. "PHOTOCATALYTIC DEGRADATION OF ORGANIC CONTAMINANTS: NOVEL CATALYSTS AND PROCESS." University of Cincinnati / OhioLINK, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=ucin995381776.

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Davydov, Lev. "Photocatalytic degradation of organic contaminants novel catalysts and process /." Cincinnati, Ohio : University of Cincinnati, 2001. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=ucin995381776.

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Books on the topic "Photocatalytic organic"

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Bignozzi, Carlo Alberto. Photocatalysis. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2011.

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Stephenson, Corey, Tehshik Yoon, and David W. C. MacMillan. Visible Light Photocatalysis in Organic Chemistry. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2018. http://dx.doi.org/10.1002/9783527674145.

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Charles, Kutal, Serpone Nick 1939-, and American Chemical Society. Division of Inorganic Chemistry., eds. Photosensitive metal-organic systems: Mechanistic principles and applications. Washington, DC: American Chemical Society, 1993.

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Anderson, Marc A. Photoelectrocatalytic degradation and removal of organic and inorganic contaminants in ground waters. Cincinnati, Ohio: U.S. Environmental Protection Agency, National Risk Management Research Laboratory, 2003.

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Barzagan, Alireza, ed. Photocatalytic Water and Wastewater Treatment. IWA Publishing, 2022. http://dx.doi.org/10.2166/9781789061932.

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Abstract This book aims to provide an overview of how photocatalysis can be employed in water and wastewater treatment. Each chapter will attend to a different area of interest, starting with an introduction on the fundamentals of photocatalysis. The covered topics include metal organic frameworks (MOFs), photocatalytic reactor types and configurations, landfill leachate treatment, and life cycle assessment (LCA) of solar photocatalytic wastewater treatment. In addition, the final two chapters provide fresh new insight, by analyzing international patents on photocatalytic materials, solar photocatalysis, and nanotechnology. ISBN: 9781789061925 (Paperback) ISBN: 9781789061932 (eBook) ISBN: 9781789061949 (ePUB)
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Sharma, Gaurav, Amit Kumar, and Pooja Dhiman, eds. Ferrite. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901595.

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Ferrites are highly interesting high-tech materials. The book covers their classification, structure, synthesis, properties and applications. Emphasis is placed an biomedical applications, degradation of organic pollutants, high frequency applications, photocatalytic applications for wastewater remediation, solar cell applications, removal of organic dyes and drugs from aquatic systems, and the synthesis of hexagonal ferrites.
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Photocatalysis in Organic Synthesis. Thieme Verlag, George, 2019.

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Stephenson, Corey R. J., Tehshik P. Yoon, and David W. C. MacMillan. Visible Light Photocatalysis in Organic Chemistry. Wiley & Sons, Incorporated, John, 2018.

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Stephenson, Corey R. J., Tehshik P. Yoon, and David W. C. MacMillan. Visible Light Photocatalysis in Organic Chemistry. Wiley & Sons, Incorporated, John, 2018.

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Stephenson, Corey R. J., Tehshik P. Yoon, and David W. C. MacMillan. Visible Light Photocatalysis in Organic Chemistry. Wiley & Sons, Incorporated, John, 2018.

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Book chapters on the topic "Photocatalytic organic"

1

Yoshida, Hisao. "Photocatalytic Organic Syntheses." In Nanostructure Science and Technology, 647–69. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-48444-0_27.

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Hinojosa-Reyes, Laura, Jorge Luis Guzmán-Mar, and Minerva Villanueva-Rodríguez. "Semiconductor Materials for Photocatalytic Oxidation of Organic Pollutants in Wastewater." In Photocatalytic Semiconductors, 187–228. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10999-2_6.

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Fox, Marye Anne. "Photocatalytic Oxidation of Organic Substrates." In Photocatalysis and Environment, 445–67. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-3015-5_16.

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Pelizzetti, E., C. Minero, and M. Vincenti. "Photocatalytic Degradation of Organic Contaminants." In Technologies for Environmental Cleanup: Toxic and Hazardous Waste Management, 101–38. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-3213-0_6.

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de Lasa, Hugo, Benito Serrano, and Miguel Salaices. "Water Decontamination of Organic Species: Modeling Reaction and Adsorption Processes." In Photocatalytic Reaction Engineering, 133–47. Boston, MA: Springer US, 2005. http://dx.doi.org/10.1007/0-387-27591-6_7.

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Sun, Dengrong, and Zhaohui Li. "Metal-Organic Frameworks (MOFs) for Photocatalytic Organic Transformations." In Nanostructured Photocatalysts, 523–35. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-26079-2_30.

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Kemacheevakul, Patiya, and Surawut Chuangchote. "Photocatalytic Remediation of Organic Pollutants in Water." In Water Pollution and Remediation: Photocatalysis, 1–51. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-54723-3_1.

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Molinari, Raffaele. "Photocatalytic Membrane Reactor: Conversion of Organic Compounds." In Encyclopedia of Membranes, 1–3. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40872-4_965-2.

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Molinari, Raffaele. "Photocatalytic Membrane Reactor: Degradation of Organic Compounds." In Encyclopedia of Membranes, 1–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40872-4_966-2.

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Vorontsov, Alexander V., and Panagiotis G. Smirniotis. "Photocatalytic Transformations of Sulfur-Based Organic Compounds." In Nanostructure Science and Technology, 579–621. New York, NY: Springer New York, 2010. http://dx.doi.org/10.1007/978-0-387-48444-0_25.

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Conference papers on the topic "Photocatalytic organic"

1

Graf, John C. "Photocatalytic Oxidation of Volatile Organic Contaminants." In International Conference on Environmental Systems. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1995. http://dx.doi.org/10.4271/951660.

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Zaitsev, A. V. "BIVALVE MOLLUSK SHELLS AS A PROMISING MATERIAL FOR PHOTOCATALYTIC APPLICATIONS." In Современные проблемы регионального развития. ИКАРП ДВО РАН, 2022. http://dx.doi.org/10.31433/978-5-904121-35-8-2022-103-106.

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The problems of the method of photocatalytic wastewater treatment from organic pollutants, concerning the ecological safety of photocatalytic materials are considered. The prospects of using bio-indifferent natural materials both as initial components of catalysts and as carriers of photocatalytic coatings are described.
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Chen, Lin. "Research on the Photocatalytic-oxidating Degradation of Organic Dyes." In 6th International Conference on Mechatronics, Materials, Biotechnology and Environment (ICMMBE 2016). Paris, France: Atlantis Press, 2016. http://dx.doi.org/10.2991/icmmbe-16.2016.129.

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Liang, Robert, Melisa Hatat-Fraile, Horatio He, Maricor Arlos, Mark R. Servos, and Y. Norman Zhou. "TiO2membranes for concurrent photocatalytic organic degradation and corrosion protection." In SPIE Nanoscience + Engineering, edited by Stefano Cabrini, Gilles Lérondel, Adam M. Schwartzberg, and Taleb Mokari. SPIE, 2015. http://dx.doi.org/10.1117/12.2188466.

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Ma, Shengqian. "Tailored Metal-Organic Frameworks for Photocatalytic Small Molecule Activation." In nanoGe Spring Meeting 2022. València: Fundació Scito, 2022. http://dx.doi.org/10.29363/nanoge.nsm.2022.109.

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Rabbani, Mahboubeh, Rahmatollah Rahimi, and Fatemeh Rafiee. "Synthesis, Characterization and Photocatalytic Activity of Porphyrin – Polyoxometalate Hybrid Material." In The 18th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2014. http://dx.doi.org/10.3390/ecsoc-18-b017.

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Hawkins, A., D. Guo, A. Steeves, F. Variola, and B. Jodoin. "Production of Titanium Dioxide with Optimum Heterojunctions and Coating Production via Cold Spray." In ITSC2022. DVS Media GmbH, 2022. http://dx.doi.org/10.31399/asm.cp.itsc2022p0483.

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Abstract Titanium dioxide (TiO2) coatings possess high appeal due to self-cleaning properties that can accelerate decomposition of organic pollutants. The global objective is to develop a cold sprayable feedstock powder with an outer titanium dioxide shell that maximises anatase-rutile heterojunctions for enhanced photocatalytic activity under ultraviolet light and the development of cold spray process parameters for successful deposition of this powder into thin photocatalytic coatings. The objective of this reported first step of our global research effort to produce superior photocatalytic TiO2 coatings by cold spray is to successfully engineer anatase and rutile nanostructure heterojunction shells on pure titanium (CP-Ti) powder known to be easily sprayable by cold spray and then verify its photocatalytic properties through exposure to an organic pollutant, methylene blue (MB). Anatase and rutile heterojunctions are desired due to high activity, stability and broadened bandwidth as opposed to each singular nanostructure. The resulting powder coming out of this first step was characterized using Raman spectroscopy to verify the presence of the desired heterojunctions. The photocatalytic reactivity was tested and evaluated through the degradation of methylene blue upon contact with the TiO2 powder. Results of this first step showed growth of desired heterojunctions and high reactivity of the produced powder.
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Rahimi, Rahmatollah, Amin Mehrehjedy, and Solmaz Zargari. "Synthesis and Photocatalytic Activity Investigation of CuO Nanorod Functionalized with Porphyrin." In The 18th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2014. http://dx.doi.org/10.3390/ecsoc-18-a028.

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Tadjarodi, Azadeh, Keyvan Bijanzad, Mohammad Moghaddasi, and Omid Akhavan. "Bismuth Oxybromide Nanosheets: Microwave Synthesis, Growth Into Microflowers and Photocatalytic Activity." In The 18th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2014. http://dx.doi.org/10.3390/ecsoc-18-c009.

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Toma, F. L., G. Bertrand, S. Ok Chwa, C. Coddet, D. Klein, P. Nardin, and A. Ohmori. "Studies of the Photocatalytic Efficiency of Titanium Dioxide Powders and Coatings Obtained by Plasma Spraying." In ITSC2004, edited by Basil R. Marple and Christian Moreau. ASM International, 2004. http://dx.doi.org/10.31399/asm.cp.itsc2004p0928.

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Abstract Titanium dioxide (TiO2) is one of the most important photocatalyst that allows the environmental purification of water and air by the decomposition of toxic organic compounds and removal of harmful gases. In the photocatalytic applications, TiO2 can be used in form of powder or coating. In this paper, two techniques of deposition were used to elaborate thin deposits starting from an agglomerated TiO2 anatase nanopowder: conventional plasma spraying in atmospheric conditions and suspension plasma spraying. The photocatalytic efficiency of the coatings was performed with respect to nitrogen oxides (NOx) and compared with the photocatalytic activity of the TiO2 Degussa P25 powder. Differences in the photocatalytic efficiencies of the nanocoatings obtained by the two techniques of plasma spraying were obtained. The coatings elaborated by suspension plasma spraying have poor mechanical properties but better photocatalytic efficiencies. This method is a promising technique to elaborate photocatalytic coatings for the removal of different air pollutants.
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Reports on the topic "Photocatalytic organic"

1

Blake, D. M. Photocatalytic and Chemical Oxidation of Organic Compounds in Supercritical Carbon Dioxide. Office of Scientific and Technical Information (OSTI), July 1999. http://dx.doi.org/10.2172/14658.

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Blake, Daniel M. Photocatalytic and Chemical Oxidation of Organic Compounds in Supercritical Carbon Dioxide. Office of Scientific and Technical Information (OSTI), December 2000. http://dx.doi.org/10.2172/827240.

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Asenath-Smith, Emily, Emma Ambrogi, Eftihia Barnes, and Jonathon Brame. CuO enhances the photocatalytic activity of Fe₂O₃ through synergistic reactive oxygen species interactions. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42131.

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Iron oxide (α-Fe₂O₃, hematite) colloids were synthesized under hydrothermal conditions and investigated as catalysts for the photodegradation of an organic dye under broad-spectrum illumination. To enhance photocatalytic performance, Fe₂O₃ was combined with other transition-metal oxide (TMO) colloids (e.g., CuO and ZnO), which are sensitive to different regions of the solar spectrum (far visible and ultraviolet, respectively), using a ternary blending approach for compositional mixtures. For a variety of ZnO/Fe₂O₃/CuO mole ratios, the pseudo-first-order rate constant for methyl orange degradation was at least double the sum of the individual Fe₂O₃ and CuO rate constants, indicating there is an underlying synergy governing the photocatalysis reaction with these combinations of TMOs. A full compositional study was carried out to map the interactions between the three TMOs. Additional experiments probed the identity and role of reactive oxygen species and elucidated the mechanism by which CuO enhanced Fe₂O₃ photodegradation while ZnO did not. The increased photocatalytic performance of Fe2O3 in the presence of CuO was associated with hydroxyl radical ROS, consistent with heterogeneous photo-Fenton mechanisms, which are not accessible by ZnO. These results imply that low-cost photocatalytic materials can be engineered for high performance under solar illumination by selective pairing of TMOs with compatible ROS.
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Blake, D. M., D. L. Bryant, and V. Reinsch. Photocatalytic and chemical oxidation of organic compounds in supercritical carbon dioxide. Progress report for FY97. Office of Scientific and Technical Information (OSTI), September 1997. http://dx.doi.org/10.2172/13733.

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Blake, D. M. Photocatalytic and chemical oxidation of organic compounds in supercritical carbon dioxide. 1998 annual progress report. Office of Scientific and Technical Information (OSTI), June 1998. http://dx.doi.org/10.2172/13734.

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Yamazaki-Nishida, S., H. W. Read, J. K. Nagano, M. A. Anderson, S. Cervera-March, T. R. Jarosch, and C. A. Eddy-Dilek. Gas phase photocatalytic degradation on TiO{sub 2} pellets of volatile chlorinated organic compounds from a soil vapor extraction well. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10194560.

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Hodgson, Alfred T., Douglas P. Sullivan, and William J. Fisk. Evaluation of Ultra-Violet Photocatalytic Oxidation (UVPCO) forIndoor Air Applications: Conversion of Volatile Organic Compounds at LowPart-per-Billion Concentrations. Office of Scientific and Technical Information (OSTI), September 2005. http://dx.doi.org/10.2172/861030.

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Tawfik, Aly, Deify Law, Juris Grasis, Joseph Oldham, and Moe Salem. COVID-19 Public Transportation Air Circulation and Virus Mitigation Study. Mineta Transportation Institute, June 2022. http://dx.doi.org/10.31979/mti.2021.2036.

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COVID-19 may have forever changed our world. Given the limited space and air circulation, potential infections on public transportation could be concerningly high. Accordingly, this study has two objectives: (1) to understand air circulation patterns inside the cabins of buses; and (2) to test the impact of different technologies in mitigating viruses from the air and on surfaces inside bus cabins. For the first objective, different devices, metrics and experiments (including colored smoke; videotaping; anemometers; pressure differentials; particle counts; and 3D numerical simulation models) were utilized and implemented to understand and quantify air circulation inside different buses, with different characteristics, and under different operating conditions (e.g. with windows open and shut). For the second objective, three different live prokaryotic viruses were utilized: Phi6, MS2 and T7. Various technologies (including positive pressure environment inside the cabin, HEPA filters with different MERV ratings, concentrated UV exposure with charged carbon filters in the HVAC systems, center point photocatalytic oxidation technology, ionization, and surface antiviral agents) were tested to evaluate the potential of mitigating COVID-19 infections via air and surfaces in public transportation. The effectiveness of these technologies on the three live viruses was tested in both the lab and in buses in the field. The results of the first objective experiments indicated the efficiency of HVAC system designs, where the speed of air spread was consistently much faster than the speed of air clearing. Hence, indicating the need for additional virus mitigation from the cabin. Results of the second objective experiments indicated that photocatalytic oxidation inserts and UVC lights were the most efficient in mitigating viruses from the air. On the other hand, positive pressure mitigated all viruses from surfaces; however, copper foil tape and fabrics with a high percentage of copper mitigated only the Phi6 virus from surfaces. High-temperature heating was also found to be highly effective in mitigating the different viruses from the vehicle cabin. Finally, limited exploratory experiments to test possible toxic by-products of photocatalytic oxidation and UVC lights inside the bus cabin did not detect any increase in levels of formaldehyde, ozone, or volatile organic compounds. Implementation of these findings in transit buses, in addition to the use of personal protective equipment, could be significantly valuable for protection of passengers and drivers on public transportation modes, possibly against all forms of air-borne viruses.
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Tawfik, Aly, Deify Law, Juris Grasis, Joseph Oldham, and Moe Salem. COVID-19 Public Transportation Air Circulation and Virus Mitigation Study. Mineta Transportation Institute, June 2022. http://dx.doi.org/10.31979/mti.2022.2036.

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COVID-19 may have forever changed our world. Given the limited space and air circulation, potential infections on public transportation could be concerningly high. Accordingly, this study has two objectives: (1) to understand air circulation patterns inside the cabins of buses; and (2) to test the impact of different technologies in mitigating viruses from the air and on surfaces inside bus cabins. For the first objective, different devices, metrics and experiments (including colored smoke; videotaping; anemometers; pressure differentials; particle counts; and 3D numerical simulation models) were utilized and implemented to understand and quantify air circulation inside different buses, with different characteristics, and under different operating conditions (e.g. with windows open and shut). For the second objective, three different live prokaryotic viruses were utilized: Phi6, MS2 and T7. Various technologies (including positive pressure environment inside the cabin, HEPA filters with different MERV ratings, concentrated UV exposure with charged carbon filters in the HVAC systems, center point photocatalytic oxidation technology, ionization, and surface antiviral agents) were tested to evaluate the potential of mitigating COVID-19 infections via air and surfaces in public transportation. The effectiveness of these technologies on the three live viruses was tested in both the lab and in buses in the field. The results of the first objective experiments indicated the efficiency of HVAC system designs, where the speed of air spread was consistently much faster than the speed of air clearing. Hence, indicating the need for additional virus mitigation from the cabin. Results of the second objective experiments indicated that photocatalytic oxidation inserts and UVC lights were the most efficient in mitigating viruses from the air. On the other hand, positive pressure mitigated all viruses from surfaces; however, copper foil tape and fabrics with a high percentage of copper mitigated only the Phi6 virus from surfaces. High-temperature heating was also found to be highly effective in mitigating the different viruses from the vehicle cabin. Finally, limited exploratory experiments to test possible toxic by-products of photocatalytic oxidation and UVC lights inside the bus cabin did not detect any increase in levels of formaldehyde, ozone, or volatile organic compounds. Implementation of these findings in transit buses, in addition to the use of personal protective equipment, could be significantly valuable for protection of passengers and drivers on public transportation modes, possibly against all forms of air-borne viruses.
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