Academic literature on the topic 'Doped activated carbon'
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Journal articles on the topic "Doped activated carbon":
Villalgordo-Hernández, David, Aida Grau-Atienza, Antonio A. García-Marín, Enrique V. Ramos-Fernández, and Javier Narciso. "Manufacture of Carbon Materials with High Nitrogen Content." Materials 15, no. 7 (March 25, 2022): 2415. http://dx.doi.org/10.3390/ma15072415.
Volperts, Aleksandrs, Ance Plavniece, Kätlin Kaare, Galina Dobele, Aivars Zhurinsh, and Ivar Kruusenberg. "Influence of Chemical Activation Temperatures on Nitrogen-Doped Carbon Material Structure, Pore Size Distribution and Oxygen Reduction Reaction Activity." Catalysts 11, no. 12 (November 30, 2021): 1460. http://dx.doi.org/10.3390/catal11121460.
Trihutomo, Prihanto, Poppy Puspitasari, Muhammad Bustomi Radja, and Milzam Rahmat Busono. "Synthesis and Characterization of Nitrogen-Doped Activated Carbon for Lithium Battery Anode Applications." Journal of Mechanical Engineering Science and Technology (JMEST) 7, no. 1 (May 1, 2023): 20. http://dx.doi.org/10.17977/um016v7i12023p020.
Li, Yue, Tong-Xin Shang, Jian-Min Gao, and Xiao-Juan Jin. "Nitrogen-doped activated carbon/graphene composites as high-performance supercapacitor electrodes." RSC Advances 7, no. 31 (2017): 19098–105. http://dx.doi.org/10.1039/c7ra00132k.
Xie, Yao, Zhen Chen, Yulong Wu, Mingde Yang, Liqiao Wei, and Husheng Hu. "Activated sintering of activated carbon-doped magnesia." Ceramics International 40, no. 10 (December 2014): 16543–47. http://dx.doi.org/10.1016/j.ceramint.2014.08.008.
Plavniece, Ance, Aivars Zhurinsh, Galina Dobele, and Aleksandrs Volperts. "Impact of Biomass Derived Raw Material on Nitrogen Doped Porous Carbon Structure." Key Engineering Materials 762 (February 2018): 99–103. http://dx.doi.org/10.4028/www.scientific.net/kem.762.99.
Frilund, Christian, Ilkka Hiltunen, and Pekka Simell. "Activated Carbons for Syngas Desulfurization: Evaluating Approaches for Enhancing Low-Temperature H2S Oxidation Rate." ChemEngineering 5, no. 2 (May 11, 2021): 23. http://dx.doi.org/10.3390/chemengineering5020023.
Kamedulski, Piotr, Malgorzata Skorupska, Izabela Koter, Maciej Lewandowski, Víctor Karim Abdelkader-Fernández, and Jerzy P. Lukaszewicz. "Obtaining N-Enriched Mesoporous Carbon-Based by Means of Gamma Radiation." Nanomaterials 12, no. 18 (September 12, 2022): 3156. http://dx.doi.org/10.3390/nano12183156.
Reljic, Snezana, Manuel Martinez-Escandell, and Joaquin Silvestre-Albero. "Effect of Porosity and Surface Chemistry on CO2 and CH4 Adsorption in S-Doped and S-/O-co-Doped Porous Carbons." C 8, no. 3 (August 15, 2022): 41. http://dx.doi.org/10.3390/c8030041.
Karakoç, Taylan, Housseinou Ba, Lai Truong Phuoc, Dominique Bégin, Cuong Pham-Huu, and Sergey N. Pronkin. "Ultramicroporous N-Doped Activated Carbon Materials for High Performance Supercapacitors." Batteries 9, no. 9 (August 24, 2023): 436. http://dx.doi.org/10.3390/batteries9090436.
Dissertations / Theses on the topic "Doped activated carbon":
Farr, Natasha. "The sequestration of gold by nanoporous, s-doped, activated carbon spheres." Thesis, Farr, Natasha (2018) The sequestration of gold by nanoporous, s-doped, activated carbon spheres. Honours thesis, Murdoch University, 2018. https://researchrepository.murdoch.edu.au/id/eprint/44788/.
Gamage, McEvoy Joanne. "Carbon-enhanced Photocatalysts for Visible Light Induced Detoxification and Disinfection." Thèse, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31099.
Cardenas, Cristian. "Analyse et modélisation du comportement des caissons d'épuration de l'air équipant les engins de chantier pour la protection des opérateurs contre les gaz et vapeurs." Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0090.
This thesis deals with the development of four models to simulate an industrial adsorption process of ammonia on zinc sulphate-doped activated carbon. It is described by mass balance, thermodynamic, hydrodynamics and adsorption kinetics equations. Since the values of parameters are needed to implement the model, the activated carbon is first characterised. Experimental measurements of ammonia adsorption isotherms on doped activated carbon were first carried out. Then a method based on the sensitivity analysis of parameters was used to evaluate the estimability of the unknown parameters involved in the Sips and Toth adsorption isotherm equations. The most estimable parameters were then identified using experimental data measured at three different temperatures, i.e. 288, 303 and 313 K. Experimental breakthrough fronts at different ammonia concentrations and gas flow rates were then measured and used to determine the overall mass transfer coefficient (kLDF), the axial dispersion coefficient (Dax), the effective diffusion coefficient (De) and the intracrystalline diffusion coefficient (Dµ) involved in the model equations, implemented and solved within Comsol Multiphysics® software. It was demonstrated that the adsorption process are limited by the diffusion and adsorption of ammonia on the zinc sulphate crystal. The identified models were then validated by means of four additional breakthrough fronts that were different from those used to identify the parameters. The model predictions and the experimental measurements showed a very agreement which is quantified by means of performance indices and confirmed by a Kolmogorov-Smirnov test. Finally, the CFD simulation of the gas flow in an air purification box was carried out by developing a dynamic model that takes into account the geometry and hydrodynamics. These models have improved the understanding of the adsorption process and can be used as a predictive tool for the design and optimization of air purification boxes used to equip cabins with pressurization and air-conditioning of mechanical devices
Jun-Lin, Sung, and 宋俊霖. "Removal of Formaldehyde with Zinc and Iron Co-doped Titania-coated Activated Carbon and Zeolite." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/22754758170870128293.
國立屏東科技大學
環境工程與科學系所
101
Volatile organic compounds and formaldehyde are common in building materials, paint and adhesive agent, which can cause formaldehyde to emit 0.11~2.11 ppm which is higher than the WHO indoor control standard (0.8 ppm), used for making building materials and fixing up a building. Although as time goes on formaldehyde will slowly decrease, the risk at causing cancer is 100~1000 times higher than the acceptable risk (10-6). Moreover, since its releasing period lasts for 3 to 15 years, it becomes invisible killer of indoor air pollution. Taiwan is a hot and humid place. There may be the problem of desorption when using adsorbents. However, the use of titanium dioxide as a catalyst can degrade harmful organics into harmless substances and purify air. Therefore, this study focuses on preparing zinc and iron co-doped titanium dioxide and sol-gel titanium coating coconut shell activated carbon, coal activated carbon and natural zeolite etc, in order to extend the life cycle of the adsorptive materials and improve indoor air quality. The properties of materials, specific surface area and porosity, surface structure image and element composition with scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), X-ray diffraction, the water isotherms and kinetics, kinetics of formaldehyde, adsorption and photolysis of formaldehyde airbag experiments. To explore zinc and iron co-doped titanium dioxide coated activated carbon and zeolite on the removal of formaldehyde. The result shows that with the SEM, titanium dioxide whose block surface contains sheets has obvious characteristic peaks of anatase (25.28o) and rutile (27.42o). Otherwise, zinc and iron co-doped titanium dioxide whose block surface contains random pieces has very weak peaks. But the formaldehyde adsorption of removal for them is close and is 0.086 and 0.084 g kg-1 respectively. Under the irradiation of mosquito and fluorescent lamp for 2 hours, the removal of formaldehyde for titanium dioxide is 0.104 and 0.111 g kg-1 respectively. Besides, under the irradiation of them for 4 and 24 hours, the removal for zinc and iron co-doped titanium dioxide is 0.113 and 0.091 g kg-1 respectively. It demonstrates that adding zinc and iron to titanium dioxide destroys the phenomenon of titanium dioxide forming anatase and rutile crystal structure, which reduces the effect and rate of photolytic degradation for formaldehyde. The organic matter for layer-by-layer and filamentous coconut shell activated carbon is 98.2%. And it with coal activated carbon of layered- groove accounts for 56.7%. With EDS analysis, the superficial carbon atoms is 94.2% and 90.7% respectively. The isotherms of water on activated carbon are classified as the V-type in IUPAC. The adsorption amount of water in low humidity is low, and adsorption amount increased significantly when raising the humidity. What’s more it has hysteresis at 45% ~ 75% RH, which means it belongs to micro-porous or meso-porous adsorbent. Zeolites are similar typeⅡ in IUPAC classification multilayer adsorption occurs with increasing humidity after monolayer adsorption. And their H4 type has narrow slit-like pores, which is consistent with the SEM image. In 10% RH airbag experiments, the remove of adsorption on coconut shell activated carbon and coal activated carbon is 0.097 g kg-1 and that of natural zeolite is 0.025 g kg-1. And for these materials in 75% RH, the remove is 0.417 g kg-1, 0.419 g kg-1 and 0.166 g kg-1 respectively. It shows raising humidity enhance the adsorption of formaldehyde for these materials. The difference of adsorption among these materials may come from the difference of their BET-specific surface area. The BET-specific surface area of coconut shell activated carbon is 684 m2 g-1 (83% porous); coal activated carbon is 761m2 g-1 (58% porous), and zeolite has minimum of 34.9 m2 g-1. Activated carbon processes larger non-polar surfaces, especially coconut shell activated carbon, it has more micro-porous surface. Coating titanium dioxide can easily lead to the loss of material micro-porous and coating zinc and iron co-doped titanium dioxide cause it to jam in the material pores and give rise to the reduction of meso-pores, macro-pores and micro-pores, which can result in BET-specific surface area decreasing more obviously. For example, the BET-specific surface area of coconut shell activated carbon coated titanium dioxide and zinc and iron co-doped titanium dioxide is 664 and 398 m2 g-1 respectively, and the adsorption of formaldehyde for them reduces to 0.366 and 0.361g kg-1 respectively, coal activated carbon is 584 and 512 m2 g-1 respectively, and the adsorption of formaldehyde for them is 0.351 and 0.339 g kg-1 respectively. Zeolite is 38 and 22 m2 g-1 respectively, and the adsorption of formaldehyde for them is 0.186 and 0.187 g kg-1 respectively. They display that coating results in not only reduction of material BET-specific surface area but also reduction of formaldehyde adsorption. In the XRD analysis, titanium dioxide coated coal activated carbon and coconut shell activated carbon both process anatase crystalline, but zinc and iron co-doped titanium dioxide coated doesn’t, zeolite has characteristic peaks of 25.76° and 27.86°. By the SEM image, with thick coating titanium dioxide, the Ti/C of coal activated carbon surface is 1.86; that of coconut shell activated carbon is 0.19 and Ti/SiO2 of zeolite is 0.10. With coating zinc and iron co-doped titanium dioxide, the Ti/C of coconut shell activated carbon is 0.02, coal activated carbon is 0.01 and the Ti/SiO2 of zeolite is 0.02. The addition of zinc and iron reduces the coating effects of titanium dioxide. Under the irradiation of fluorescent (24hr) and mosquito lamp (6hr), the photolytic amount of formaldehyde for titanium dioxide coated coal activated carbon (0.073 and 0.112 g kg-1), coconut shell activated carbon (0.033 and 0.067 g kg-1) and zeolite (0.101 and 0.203 g kg-1 ) are all higher than that for zinc and iron co-doped titanium oxide coated coal activated carbon (0.042 and 0.091 g kg-1), coconut shell activated carbon (0.039 and 0.052 g kg-1) and zeolite (0.093 and 0.119 g kg-1). Furthermore, the effect under the irradiation of mosquito lamp is better than that under the irradiation of fluorescent. Because titanium dioxide coated zeolite is in sufficient amount of formaldehyde, it continues its photolytic degradation as time goes on. Consequently, the photolytic amount for it is the most among these materials, which indicates that the photolysis continuity of titanium dioxide can be expected. The concentration of carbon dioxide (50-360 ppm) in each airbag increases after photolysis. The addition of concentration of carbon dioxide under the irradiation of mosquito lamp (180-360) is more than under the irradiation of fluorescent lamp (50-150 ppm).
HUANG, JUN-BIN, and 黃俊彬. "Study on the Application of Annealing and Nitrogen-Doped Holey Graphene/Activated Carbon in Supercapacitor." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/82847185204096135518.
Chang, Yin-Yu, and 張銀佑. "Synthesis and Characterization of Metal-doped Amorphous Carbon Films Deposited by a Cathodic Arc Activated Deposition Process." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/69369145774616095311.
國立中興大學
材料工程學研究所
92
Diamond-like Carbon (DLC) films containing various metal doping were synthesized by using a cathodic-arc activated deposition (CAAD) process. Metal plasma with intensive ion energies catalyzes the decomposition of hydrocarbon gases (C2H2), and induces the formation of hydrogenated amorphous carbon films with a mixture of sp2 and sp3 carbon bonds. The composite film structure consists of a metal- doped amorphous carbon film on top of a graded metal nitride interlayer, which provides enhanced mechanical and tribological properties. In this study, the plasma characteristics of the CAAD process for the deposition of metal-doped a-C:H was investigated by Langmuir probe measurement and optical emission spectroscopy. The catalysis effect of three common transition metal plasmas, including Cr, Ti, and Zr was investigated. This experiment depicts the advantage of the catalysis effect of Cr plasma in synthesizing DLC films with a higher sp3 carbon bond ratio comparing with that of Ti and Zr plasma. The wear properties were correlated with the metal doping determined by atomic size and electronic configuration. A catalytic ability ranking of transition metals for the deposition of metal-doped amorphous carbon films was suggested. Nitrogen was also introduced to form nitrogen-containing Cr-C:H/N films, which contained a mixture of sp2 and sp3 carbon bonds. The mechanical properties were correlated with the nitrogen doping. When nitrogen atoms occupy the substitutional sites to a large percentage, a donor energy level would be created and induces an increasing electrical conductivity.
Huang, Chan-Yeh, and 黃展業. "The Adsorption and Photocatalysis of Toluene by Prepared Activated Carbon with Nitrogen and Iron Co-doped Titanium Dioxide." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/51861156803048498148.
國立屏東科技大學
環境工程與科學系所
101
People spend about 90% of their time on indoor activites every day, and about 30% of global new or renovated buildings have hazardous indoor air pollutants such as volatile organic compounds (VOCs). For example, toluene is common in decorating materials and consumed products, and indoor emitted toluene will cause harm to human health in the long term. Charcoal products are common adsorptive materials, but the adsorptive ability is limited. Titanium dioxide possesses the function of photocatalysis for volatile organic compounds, but it can have terrific activity under the condition of wavelength being smaller than 387.5 nm. In the study, we choose two kinds of charcoal materials (Longan charcoal and Makino bamboo charcoal) as activative materials, and use three kinds of concentration of sodium hydroxide solution as activators. To screen better photocatalyst under fluorescent lamp irradiation, we modify titanium dioxide with nitrogen, iron, zinc and citric acid co-doped, and household mosquito lamps and fluorescent lamps are taken as light sources, respectively. Then we select activated charcoal materials as supports to coat photocatalys, and toluene as a pollutant. The properties of materials, specific surface area and porosity, surface structure image and element composition with scanning electron microscope (SEM) and energy dispersive spectrometer (EDS), x-ray diffraction, photocatalytic activity of toluene and methylene blue experiment, sorption kinetics of toluene experiment, adsorption and photocatalysis of toluene experiments is analyzed. To discuss the effects of activation for charcoal materials, the characteristics of doped titanium dioxide, and the properties and removals of toluene for photocatalyst coated granular activated charcoal. The charcoal materials were activated with sodium hydroxide solution in chemical activation. With the increasing concentration of sodium hydroxide, the content of organic matter raise. The charcoal materials are mainly C (≒ 90) and O. We observe that parenchyma cells appear rift, etch, and even the collapsed surface of tube walls with the SEM. With the number of pores increasing and the pores widening, the materials are able to become easier to shatter. Also, the granular completeness can be destroyed, which causes the yield (78~52%) of granules decrease. Since bulk density is reduced, and particle density is increased, porosity raises. Moreover, it significantly boosts the BET-specific surface area and the total pore volume, which the micropores account for 80.8~88.1% and the average pore diameter is 21.5 Å. The BET-specific surface area of 5M LC and 5M MBC is 566 and 333 m2 g-1, respectively. Which benefits adsorption kinetics of 0.015P/P0 toluene (10% RH), and the toluene adsorption for 5M charcoal materials is 16.5~29.1 times the amount of Longan charcoal and Makino bamboo charcoal. The adsorption of 5M LC reaches a balance more difficult than that of 5M MBC does and they still remain 80% of toluene adsorption at constant temperature after six-hour desorption. Under the situation of 346 ppm toluene, the removal of 5M charcoal materials is 4 to 5 times the amount of original materials, and its rate of removal is over 90% in 2 hours. Therefore, we can conclude that the activation of 5M sodium hydroxide solution can obviously improve the amount and rate of adsorption for charcoal materials to toluene. We observe the surface of photocatalysts with the SEM, and find that the blocks of titanium dioxide are the largest and most. Co-doping with nitrogen, iron, zinc and citric acid can lower the ability of turning into block of TiO2 and increase the tiny particles. The blocks of NFeTiO2 are the smallest and least, but its tiny particles are the most. The tiny particles contain is more titanium than the blocks. The ratio, O/Ti, of NFeZnCATiO2 and NFeZnTiO2 is 2.05 and 2.87, respectively, and Fe (0.1~0.13%) and Zn (0.02~0.11%) can be measured, but N can't. In X-ray diffraction, the characteristic peak positions of photocatalysts are consistent with anatase, and the crystal form of photocatalysts could be identified as anatase. There are the removals of methylene blue by photocatalysts under mosquito lamp irradiation for 6 hours: the removal of TiO2 is the greatest (6.34 g kg-1). However, the removals of co-doped TiO2 reduce to 3.87~4.79 g kg-1. Nevertheless, both of two situation mentioned above can be photolyzed completely under mosquito lamp irradiation for 24 hours. Under fluorescent lamp irradiation for 24 hours, the removals of co-doped TiO2 are 5.18~5.50 g kg-1, while the TiO2 is only 3.10 g kg-1. The adsorption of NFeZnCATiO2 to toluene (57.5 ppm, 10%RH) is the highest (1.05 g kg-1) for 24 hours, but that of TiO2 (0.34 g kg-1) is the lowest. Under mosquito lamp irradiation, the removal of photocatalysts is NFeTiO2 (6.58 g kg-1) > NFeZnTiO2≒NFeZnCATiO2 > TiO2 (4.72 g kg-1). As for under fluorescent lamp irradiation, the removal is NFeTiO2 (2.33 g kg-1) > TiO2 > NFeZnTiO2 ≒ NFeZnCATiO2 (0.83 g kg-1). Under 75%RH, the adsorption of NFeTiO2 is 2.01 g kg-1 and that of TiO2 is 1.60 g kg-1. Under mosquito lamp irradiation, the final removal of the control group is 1.30 g kg-1, which shows that photochemical reaction of toluene will be inhibited in high-humid environment. The TiO2 (7.24 g kg-1) is better than NFeTiO2 (4.89 g kg-1) for 6 hours. Under fluorescent lamp irradiation, the removal of NFeTiO2 (4.16 g kg-1) is slightly higher than that of TiO2 (2.97 g kg-1). It demonstrates that though the N, Fe co-doped TiO2 which has tiny particle and higher Ti content has slightly less removal for organic compound than TiO2 does under mosquito lamp irradiation. Furthermore, no matter the organic compound is in liquid or gas, the removal of NFeTiO2 for organic compound is better than TiO2 under fluorescent lamp irradiation. The particle density of NFeTiO2 coated 5M charcoal increases, and that of TiO2 coated 5M charcoal remain. Photocatalyst coated 5M charcoal causes the increase of pH value and the decrease of organic matter. In the surface observation of the SEM, TiO2-coated charcoal materials have ablation phenomenon, but probably because the capability of turning into blocks decline, the structural destruction of NFeTiO2 coated 5M charcoal is not obvious. Both coatings are heterogeneous and have blocks on them. As the frequency of NFeTiO2 coating increases, the contents of Ti and O increase whereas the content of carbon decreases, and 5M bamboo charcoal has better effect of coating. The weak anatase charateristic peaks of TiO2 and NFeTiO2 coated 5M charcoal appear only at 25.28° in the X-ray diffraction. As the frequency of NFeTiO2 coating increases, the characteristic peaks become more obvious. When 5M MBC is used as a support, brookite peaks (30.8°) appear. Photocatalyst-coated charcoal causes micropore surface area and pore volume to decrease, which has more obvious effect with TiO2 coating and only the pore volume of NFeTiO2 coated 5M LC and 5M MBC which is coated twice (0.2204 and 0.1377 cm3 g-1) slightly lowers than that of the 5M charcoal (0.2595 and 0.1519 cm3 g-1). The ratio of toluene uptake adsorption (114.0~125.8 and 31.4~34.9 g kg-1) for NFeTiO2/5M LC and NFeTiO2/5M MBC is similar to that of BET surface area (426 and 142 m2 g-1). The ratio of desorption to adsorption of NFeTiO2/5M LC and NFeTiO2/5M MBC is respectively 0.18 and 0.35 which is corresponding with their BJH/BET surface area (0.194 and 0.28 respectively). The residual of toluene in NFeTiO2/5M LC and NFeTiO2/5M MBC constantly increase, and the range is 90.3~100.1 and 19.3~22.7, respectively. We speculate toluene is still filling in micropore. The adsorption of Makino bamboo charcoal and NFeTiO2/5M MBC (75.1 and 257.6) for 75%RH water vapor, is more excellent than that of Longan charcoal and NFeTiO2/5M LC (58.9 and 174.2), and water can be desorbed completely. The toluene (346.4 ppm, 10%RH) adsorption mainly occurs for two hours, and the removal of 5M LC is highest. Additionally, the removal of NFeTiO2/5M MBC is lower than that of 5M MBC. During the 12th~36th hour, the removals of 5M MBC and NFeTiO2/5M MBC below a mosquito lamp and fluorescent lamp are 1.8, 1.3 and 6.6, 4.9, respectively. The removals of 5M MBC, TiO2- and NFeTiO2- coated 5M charcoal for toluene (808.3 ppm, 75%RH) adsorption are 36.2~38.3, 28.0~29.3 and 20.5~21.9 g kg-1, respectively, and when a mosquito lamp is added, the removals are 5.9, 7.9, 8.5, respectively. When a fluorescent lamp is added, the removals are 6.6, 2.3 and 6.4 g kg-1, respectively. Which shows that removal effect of adsorption is better than that of photoysis, N, Fe co-doped TiO2 not only improves the photolysis of toluene under a fluorescent lamp irradiation (which is triple the effect of TiO2), but also excels TiO2 under a mosquito lamp irradiation.
Zhang, Zhi-Yu, and 張志宇. "Degradation of Rhodamine B and Bisphenol A using Potassium peroxymonosulfate activated by one-step prepared sulfur-doped carbon nitride as a non-metallic heterogeneous photocatalyst." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/10473021732817643742.
國立中興大學
環境工程學系所
105
Advanced Oxidation Processes (AOPs) mainly removes contaminants by free radical oxidation which is produced from oxidants. In this study, Potassium peroxymonosulfate (PMS) was used as the oxidant to produce sulfate radicals (SO4-•) which had stronger redox potential than hydroxyl radical (OH•). However, it shows slow response for PMS producing sulfate radicals. A transition metal catalyst to enhance activate degradation speed is needed. In order to reduce the cost and environmental impact of the metal catalyst, non-metallic catalysts will be seen as a future trend. In this work, one-step preperation for sulfur-doped carbon nitride (CNS) was used as a non-metallic and easily prepared catalyst to activate PMS to degrade target contaminants Rhodamine B (RhB) and Bisphenol A (BPA). CNS was analyzed by FE-SEM, TEM, BET, XRD, XPS and other instruments. Since the prepared CNS exhibits a higher surface area and catalytic activity than the undoped sulfur-based carbonitride (CN). Contaminants degradation by CNS activated PMS exhibits a much higher efficiency than CN activated PMS. Therefore we speculate that the synergistic effect of sulfur and nitrogen co-doping in CNS may lead CNS exhibit higher catalytic and photocatalytic properties. From RhB and BPA degradation test, temperature, pH, co-existing ion simulation of the target contaminants may occur in the environment. It is more conducive for CNS catalyzed PMS to degrade contaminants in high temperature and neutral conditions. When high concentrated NaCl as co-existing ions was added into contaminated water, the effect of CNS catalyzed PMS degradation was not affected. The free radical scavenger test proved that sulfate radicals are the main free radicals in this experiment. Finally, five times CNS recyclability recveals almost the same result to CNS catalyzed PMS degradation batch experiment. These characteristics indicate that CNS is a convenient preparation and effective nonmetallic photocatalyst and is suitable for catalyzing PMS degradation of RhB and BPA.
Chiang, Chun-Wei, and 江俊緯. "Undoped and doped activated carbons derived from phenylphenol precursors and their electric storages via double layer capacitance." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/5gdh9s.
國立臺灣科技大學
化學工程系
106
In this study, a low-cost chemical phenylphenol has been implemented as the precursor of activated carbon for electrochemical capacitor applications. The energy storage capability of this activated carbon is further enhanced by doping of B and N. In undoped activated carbon, the specific surface area of the activated carbon can be increased by raising the pyrolysis temperature and the amount of the pore-forming potassium agents, and the pore size also become larger and more. The molar ratio of phenylphenol to potassium increased from 1:1.5 to 1:20, specific surface area increased from 948 m2 g-1 to 2528 m2 g-1, when para-phenylphenol is used as a precursor at 900C; specific surface area increased from 1323 m2 g-1 to 1740 m2 g-1, when ortho-phenylphenol is used as a precursor. The specific capacitance can be greater than 200 F g-1, using a high specific surface area undoped activated carbon at scan rate of 0.5 mV s-1 in 0.5 M H2SO4(aq). The specific capacitance exceeds 400 F g-1 at scan rate of 1 mV s-1 in 1 M TEABF4 in ACN. Also it displays good cycle stability. Boron-doped activated carbon obtained after incorporation of 5% boric acid, regardless of the molar ratio of phenylphenol to potassium is 1:12 or 1:20, both achieve a larger specific surface area than undoped activated carbon, the specific surface area can be up to 2609 m2 g-1, and the pore also tends to increase in size. The specific capacitance of the boron-doped activated carbon is 316.6 F g-1 at scan rate of 0.5 mV s-1 in 0.5 M H2SO4(aq). The specific capacitance is 509.7 F g-1 at a scan rate of 1 mV s-1 in 1 M TEABF4 in ACN. The specific surface area is up to 2659 m2 g-1, when the amount of boric acid is increased to 10%, the specific surface area and pores are more enhanced than 5% boron. The specific capacitance of the boron-doped activated carbon is 344.7 F g-1 at scan rate of 0.5 mV s-1 in 0.5 M H2SO4(aq). The specific capacitance is 521.3 F g-1 at a scan rate of 1 mV s-1 in 1 M TEABF4 in CAN, regardless of whether the doping amount of boron is 5% or 10%, and it shows good cycle stability. After doping with nitrogen, the activated carbon obtained through pyrolysis at 900C, the specific surface area reaches 3000 m2 g-1 or more, and the amount of mesoporous pores is raised as well. Nitrogen-doped activated carbon is measured with specific capacitance more than 500 F g-1 at scan rate of 0.5 mV s-1 in 0.5 M H2SO4(aq). Specific capacitance more than 550 F g-1 can be obtained at a scan rate of 1 mV s-1 in 1 M TEABF4 in ACN, and the cycle stability is also excellent, but the yield is less than 20%. Finally, two different electrolytes (TEABF4 and TBABF4) and five different pore size distributions of activated carbon were used to study the connections between different pore sizes on different ion sizes. We also find TBA+ hardly enter pores which the size is smaller than 1.5 nm, when comparing the difference in cyclic voltammetry curves measured from different electrolytes and the pore size distribution pattern.
HUYEN, TRAN THI DIEU, and 陳氏妙玄. "Preparation of Activated Carbons Derived from Oil Palm Empty Fruit Bunch and Their Modification by N-doped Treatment for Supercapacitor." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/usu5fy.
國立中正大學
化學工程研究所
107
Activated carbon (AC) is regarded as one of the most promising active materials for high performance supercapacitor (SC) owning to its high specific surface area and theoretical specific capacity. In this study, oil palm empty fruit bunch (EFB) which is the agricultural residue was employed as precursor to produce ACs which were fabricated by a series of cleaning, carbonization and chemical activation processes. The as-produced AC possesses a specific surface area of 2774 m2/g, which is very high among the AC produced from biomass materials. In order to enhance the performance of SC, the AC was modified by nitrogen doping treatment. The specific capacity of AC and nitrogen-doped AC were 182 to 215 F/g, respectively, at a current density of 0.5 A/g in 6M KOH aqueous electrolyte. We demonstrated that the agriculture waste can be processed to become activated carbon with a high specific surface area for SC application.
Books on the topic "Doped activated carbon":
Pļavniece, Ance. Lignocellulisic Nanopouros Carbon Materials for Fuel Cells. RTU Press, 2021. http://dx.doi.org/10.7250/9789934226830.
Book chapters on the topic "Doped activated carbon":
Hu, Zhihui, Tao Xu, Pengfei Liu, and Markus Oeser. "Fe-doped TiO2 loaded on activated carbon for degrading vehicle exhaust in asphalt pavement." In Green and Intelligent Technologies for Sustainable and Smart Asphalt Pavements, 50–56. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003251125-9.
Kováčová, Mária, Eva Špitalská, and Zdenko Špitálský. "Light-Activated Polymer Nanocomposites Doped with a New Type of Carbon Quantum Dots for Antibacterial Applications." In Urinary Stents, 315–24. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-04484-7_25.
Conference papers on the topic "Doped activated carbon":
BARBOSA, DANNS PEREIRA, MARIA DO CARMO RANGEL, and DENILSON RABELO. "ACTIVATED CARBON-SUPPORTED COPPER-DOPED IRON OXIDE FOR ETHYLBENZENE DEHYDROGENATION." In Proceedings of the 5th International Symposium. WORLD SCIENTIFIC, 2008. http://dx.doi.org/10.1142/9789812779168_0062.
SHARMA, AJIT, ASHUTOSH SHARMA, NISHITH VERMA, and NALINI SANKARARAMAKRISHNAN. "IRON DOPED MICROPOROUS ACTIVATED CARBON (PHENOLIC RESIN) AS AN ADSORBENT FOR ARSENIC REMOVAL." In Proceedings of the International Conference on CBEE 2009. WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789814295048_0098.
Zhou, Jie, Beibei Zhu, Lu Wang, Ya Li, and Qichen Qiao. "Enhanced photocatalytic activity of Fe-doped TiO2 coated on N-doped activated carbon composites for photocatalytic degradation of dyeing wastewater." In 2ND INTERNATIONAL CONFERENCE ON MATERIALS SCIENCE, RESOURCE AND ENVIRONMENTAL ENGINEERING (MSREE 2017). Author(s), 2017. http://dx.doi.org/10.1063/1.5005187.
Kim, Eun Ji, Soyoung Baek, Baek Kim, and Jiyeol Bae. "Development of Iron Doped Activated Carbon for Pharmaceuticals Removal and Adsorbents Regeneration by UV in Water." In The 8th World Congress on Civil, Structural, and Environmental Engineering. Avestia Publishing, 2023. http://dx.doi.org/10.11159/iceptp23.111.
Qin, Hangdao, Hui Li, Yong Wang, and Jing Chen. "Removal of Benzoic Acid by Catalytic Ozonation with CeO2 Loaded on N, S Co-Doped Activated Carbon Catalyst." In 2nd International Conference on Material Science, Energy and Environmental Engineering (MSEEE 2018). Paris, France: Atlantis Press, 2018. http://dx.doi.org/10.2991/mseee-18.2018.51.
Moreno-Hernandez, Lizbeth, Santiago Ospina-Rivas, Urel Andreas Espadín - Davila, Marko Jeran, and Rigoberto Barrios-Francisco. "Dehydrogenation of Hantzsch Dihydropyridines with Hetero-geneous Cobalt Oxide Catalyst Supported in N-Doped Acti-vated Carbon." In Socratic Lectures 7. University of Lubljana Press, 2022. http://dx.doi.org/10.55295/psl.2022.d17.
Lobato, J., P. Can˜izares, M. A. Rodrigo, J. J. Linares, and B. Sa´nchez-Rivera. "Testing Different Catalysts for a Vapor-Fed PBI-Based Direct Ethanol Fuel Cell." In ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2009. http://dx.doi.org/10.1115/fuelcell2009-85055.