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Recent Developments of Advanced Ti3+-Self-Doped TiO2 for Efficient Visible-Light-Driven Photocatalysis. Catalysts 2020. [DOI: 10.3390/catal10060679] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Research into the development of efficient semiconductor photocatalytic materials is a promising approach to solving environmental and energy problems worldwide. Among these materials, TiO2 photocatalysts are one of the most commonly used due to their efficient photoactivity, high stability, low cost and environmental friendliness. However, since the UV content of sunlight is less than 5%, the development of visible light-activated TiO2-based photocatalysts is essential to increase the solar energy efficiency. Here, we review recent works on advanced visible light-activated Ti3+-self-doped TiO2 (Ti3+–TiO2) photocatalysts with improved electronic band structures for efficient charge separation. We analyze the different methods used to produce Ti3+–TiO2 photocatalysts, where Ti3+ with a high oxygen defect density can be used for energy production from visible light. We categorize advanced modifications in electronic states of Ti3+–TiO2 by improving their photocatalytic activity. Ti3+–TiO2 photocatalysts with large charge separation and low recombination of photogenerated electrons and holes can be practically applied for energy conversion and advanced oxidation processes in natural environments and deserve significant attention.
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52
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Zhou W, Shen B, Wang F, Zhang X, Zhao Z, Si M, Guo S. Enhanced photocatalytic degradation of xylene by blackening TiO 2 nanoparticles with high dispersion of CuO. JOURNAL OF HAZARDOUS MATERIALS 2020; 391:121642. [PMID: 32045798 DOI: 10.1016/j.jhazmat.2019.121642] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/20/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
To enhance the photocatalytic activity of TiO2, a new preparation method has been proposed to synthesize the catalysts by introducing Cu-MOF as a precursor and performing a blackening process via a mixture with NaBH4 for TiO2 nanoparticles (CuO-TiO2(mb)). The results showed that the removal efficiency of xylene under ultraviolet and visible light over CuO-TiO2(mb) was 3.45 times higher than that of the catalysts prepared by impregnation of CuO on the surfaces of TiO2 (CuO-TiO2(d)) and 12.12 times higher than that of pure TiO2 nanoparticles. Analyses by the X-ray diffraction, scanning electron microscopy, and transmission electron microscopy indicated that the introduction of Cu-MOF as a precursor on the surface of the catalyst resulted in CuO-TiO2(mb) presenting a lower grain size compared with TiO2 nanoparticles and CuO-TiO2(d). The results of X-ray photoelectron spectroscopy, diffuse reflectance spectrum and photoluminescence indicated that blackening process narrowed the bind gap width and shortened the band gap from 2.95 eV to 1.32 eV, introduced the coexistence of Ti4+, Ti3+, Cu2+ and Cu+ in CuO-TiO2(mb) decreased the recombination rate of e--h+, which greatly improved the light response of CuO-TiO2(mb) under ultraviolet and visible light, resulting in the benefit to the photocatalytic reaction.
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Affiliation(s)
- Wenjun Zhou
- School of Energy and Environmental Engineering, Key Laboratory of Clean Energy Utilization and Pollutant Control in Tianjin, Hebei University of Technology, China
| | - Boxiong Shen
- School of Energy and Environmental Engineering, Key Laboratory of Clean Energy Utilization and Pollutant Control in Tianjin, Hebei University of Technology, China.
| | - Fumei Wang
- School of Energy and Environmental Engineering, Key Laboratory of Clean Energy Utilization and Pollutant Control in Tianjin, Hebei University of Technology, China
| | - Xiao Zhang
- School of Energy and Environmental Engineering, Key Laboratory of Clean Energy Utilization and Pollutant Control in Tianjin, Hebei University of Technology, China
| | - Zhong Zhao
- School of Energy and Environmental Engineering, Key Laboratory of Clean Energy Utilization and Pollutant Control in Tianjin, Hebei University of Technology, China
| | - Meng Si
- School of Energy and Environmental Engineering, Key Laboratory of Clean Energy Utilization and Pollutant Control in Tianjin, Hebei University of Technology, China
| | - Shengqi Guo
- School of Energy and Environmental Engineering, Key Laboratory of Clean Energy Utilization and Pollutant Control in Tianjin, Hebei University of Technology, China
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Katančić Z, Chen WT, Waterhouse GI, Kušić H, Lončarić Božić A, Hrnjak-Murgić Z, Travas-Sejdic J. Solar-active photocatalysts based on TiO2 and conductive polymer PEDOT for the removal of bisphenol A. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112546] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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54
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Mechanochemical synthesis of nanophotocatalysts SiO2/TiO2/Fe2O3: their structural, thermal and photocatalytic properties. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01462-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AbstractIn the study the mechanochemical synthesis was used to prepare photocatalytic materials based on TiO2, SiO2, and Fe2O3. During the preparation the impact of composition, milling speed, and calcination process on the properties of the composites was investigated. The structural and thermal properties of photocatalysts were determined using the N2 adsorption/desorption, XRD, and FT-IR/PAS methods. The thermal stability of the obtained materials was also examined (TG/DTG). Moreover, their photocatalytic activity was tested in relation to Methylene Blue at UV and Vis radiation. The results indicate that the mechanochemical synthesis in the high-energy planetary mill is an effective method for obtaining materials with photocatalytic properties at the UV and Vis radiation. It was shown that the removal process of MB may be described by the pseudo-first-order kinetics.
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Tang B, Ren S, Zhang Z, Huang W, Wang Z, Dai Y. High Performance Composite Photocatalysts based on Metal Organic Framework as the Modifier. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000053] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Bo Tang
- Changzhou University; Changzhou P. R. China
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56
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Trap State and Charge Recombination in Nanocrystalline Passivized Conductive and Photoelectrode Interface of Dye-Sensitized Solar Cell. COATINGS 2020. [DOI: 10.3390/coatings10030284] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The dynamic competition between electron generation and recombination was found to be a bottleneck restricting the development of high-performance dye-sensitized solar cells (DSSCs). Introducing a passivation layer on the surface of the TiO2 photoelectrode material plays a crucial role in separating the charge by preventing the recombination of photogenerated electrons with the oxidized species. This study aims to understand in detail the kinetics of the electron recombination process of a DSSC fabricated with a conductive substrate and photoelectrode film, both passivized with a layer of nanocrystalline TiO2. Interestingly, the coating, which acted as a passivation layer, suppressed the back-electron transfer and improved the overall performance of the integrated DSSC. The passivation layer reduced the exposed site of the fluorine-doped tin oxide (FTO)–electrolyte interface, thereby reducing the dark current phenomenon. In addition, the presence of the passivation layer reduced the rate of electron recombination related to the surface state recombination, as well as the trapping/de-trapping phenomenon. The photovoltaic properties of the nanocrystalline-coated DSSC, such as short-circuit current, open-circuit voltage, and fill factor, showed significant improvement compared to the un-coated photoelectrode film. The overall performance efficiency improved by about 22% compared to the un-coated photoelectrode-based DSSC.
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57
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Brasileiro ILO, Madeira VS, de Souza CP, Lopes-Moriyama AL, Ramalho MLRDA. α-Fe2O3/Nb2O5 mixed oxide active for the photodegradation of organic contaminant in water: Factorial experimental design application and reaction mechanism investigation. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2019.112199] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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58
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Yin H, Wang Z, Tang Y, Chourashiya M, Li X, Yuan H, Yan N, Ren X. Different Enhancement Mechanisms of the Anodizing Al‐Doped or Sn‐Coupled Ti
3
SiC
2
for the Photoelectrochemical Performance. ChemistrySelect 2020. [DOI: 10.1002/slct.201904493] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Hongfeng Yin
- Functional Materials LaboratoryCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China
| | - Zhiwei Wang
- Functional Materials LaboratoryCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China
- Institute for Advanced StudyShenzhen University Shenzhen 518060 China
| | - Yun Tang
- Functional Materials LaboratoryCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China
| | | | - Xiuting Li
- Institute for Advanced StudyShenzhen University Shenzhen 518060 China
| | - Hudie Yuan
- Functional Materials LaboratoryCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China
| | - Nan Yan
- Functional Materials LaboratoryCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China
| | - Xiaohu Ren
- Functional Materials LaboratoryCollege of Materials Science and Engineering, Xi'an University of Architecture and Technology Xi'an 710055 China
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Rouibah I, Zeghioud H, Khellaf N, Aymen AASSADI, Benmansour H, Djelal H, Amrane A. Intensified Photocatalytic Degradation of Solophenyl Scarlet BNLE in Simulated Textile Effluents Using TiO2 Supported on Cellulosic Tissue. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2020. [DOI: 10.1515/ijcre-2019-0117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe Heterogeneous photocatalysis, increasingly used in effluent purification, is attracting more and more attention by the development of new photocatalytic materials based on semiconductors deposited on various supports. In this work, TiO2 supported on cellulosic fiber was prepared and characterized by different analytical techniques such as X-ray Photoelectron Spectrometry and Brunauer-Emmett-Teller surface area. Its photocatalytic activity was investigated for the degradation of Solophenyl Scarlet BNLE (SS), an organic pollutant present in textile effluents. Several conditions were investigated such as adsorption under UV and visible irradiation, catalyst recyclability, the simulated effluent pH and the presence of H2O2 as an oxidant agent. Results showed that under UV light, the removal of SS decreased significantly with increasing initial dye concentration. For an initial concentration of 5 mg/L, SS degradation was reached more than 95 % after 2 hours of treatment (neutral pH, T = 20 °C). The supported TiO2 on cellulose remains effective over four cycles of dye treatment. In the presence of H2O2, the degradation process was inhibited with increasing the molar ratio [H2O2]/[SS]0 from 5 to 30. The kinetic modeling showed that the removal of this pollutant followed a pseudo-first-order model (Langmuir-Hinshelwood) with a regression coefficient (R2) value of 0.984.
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Affiliation(s)
- Ikram Rouibah
- Department of Process Engineering, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba23000, Algeria
| | - Hichem Zeghioud
- Department of Process Engineering, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba23000, Algeria
| | - Nabila Khellaf
- Department of Process Engineering, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba23000, Algeria
| | - Amine ASSADI Aymen
- ENSCR, University of Rennes 1, 11 Allée de Beaulieu, CS 50837, Rennes 35708Rennes, France
- Ille et Vilaine, ecole de chimie de Rennes, 11 allée de Beaulieu, Rennes35700, France
| | - Hédi Benmansour
- Unité de Recherche Analyses et Procédés Appliqués à l‘Environnement UR17ES32 ISSAT Mahdia, Mahdia, Tunisia
- ISSAT Mahdia, Mahdia, Tunisia
| | - Hayet Djelal
- Unilasalle-Ecole des Métiers de l’Environnement, Campus de Ker Lann, 35170 Bruz, FranceBruz, France
- Ecole nationale superieure de chimie de Rennes, Rennes, Bretagne, France
| | - Abdeltif Amrane
- ENSCR, University of Rennes 1, 11 Allée de Beaulieu, CS 50837, Rennes 35708Rennes, France
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60
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Riaz N, Hassan M, Siddique M, Mahmood Q, Farooq U, Sarwar R, Khan MS. Photocatalytic degradation and kinetic modeling of azo dye using bimetallic photocatalysts: effect of synthesis and operational parameters. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:2992-3006. [PMID: 31838680 DOI: 10.1007/s11356-019-06727-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 10/10/2019] [Indexed: 05/14/2023]
Abstract
Industrial wastewaters are the major source polluting the surface and ground water resources. Pollutants released along with the untreated textile industry wastewaters are responsible for the great damage to the natural resources like water. Considering the hazardous effects of the azo dyes (textile coloring agents) and their byproducts, there is a need to develop cost-effective and efficient treatment method for the textile wastewaters as such dyes have been reported as toxic, mutagenic, and carcinogenic and can cause direct demolition of aquatic communities. One of the possible and effective treatment methods is the use of TiO2 photocatalysis due to its chemical stability, low cost, and non-toxic nature. The present study explored the photocatalytic potential of anatase-type of bimetallic Cu-Ni/TiO2 photocatalysts under visible light irradiation for possible photocatalytic degradation and mineralization of Methyl Orange (MO), as model azo dye. The focus was to correlate the synthesis (different calcination temperatures, phase composition of TiO2 either anatase or rutile, and metal ion loading in terms of concentration and composition (Cu:Ni)) and operational parameters (photocatalyst loading, pollutant concentration, and irradiation time) that were believed responsible for the enhanced photocatalytic performance. Blank experiments were carried out to check the effect of metal loading in comparison to bare TiO2 and effect of absence or presence of light and photocatalysts on MO photodegradation. Results obtained using bimetallic photocatalysts are promising as compared to bare TiO2 as 100% MO removal and ~ 90% %COD removal were obtained in 90 min of irradiation, obeying a pseudo-first-order kinetics with photocatalytic reaction via the Langmuir-Hinshelwood mechanism with a good linear fit. Photocatalysts synthesized using anatase TiO2 were reported with improved performance compared to rutile phase. It is evident that synthesis parameters influence photocatalyst performance directly. The higher rate constant (> 1) that proves the excellent adsorption capacity of the tested photocatalysts for tested pollutants on the surface may have a great prospective for photocatalytic water purification at neutral pH.
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Affiliation(s)
- Nadia Riaz
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan.
| | - Maryam Hassan
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Maria Siddique
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Qaisar Mahmood
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan.
| | - Umar Farooq
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Rizwana Sarwar
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
| | - Muhammad Saqib Khan
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
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61
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Koe WS, Lee JW, Chong WC, Pang YL, Sim LC. An overview of photocatalytic degradation: photocatalysts, mechanisms, and development of photocatalytic membrane. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:2522-2565. [PMID: 31865580 DOI: 10.1007/s11356-019-07193-5] [Citation(s) in RCA: 225] [Impact Index Per Article: 56.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 11/27/2019] [Indexed: 05/12/2023]
Abstract
Photocatalysis is an ecofriendly technique that emerged as a promising alternative for the degradation of many organic pollutants. The weaknesses of the present photocatalytic system which limit their industrial applications include low-usage of visible light, fast charge recombination, and low migration ability of the photo-generated electrons and holes. Therefore, various elements such as noble metals and transition metals as well as non-metals and metalloids (i.e., graphene, carbon nanotube, and carbon quantum dots) are doped into the photocatalyst as co-catalysts to enhance the photodegradation performance. The incorporation of the co-catalyst which alters the photocatalytic mechanism was discussed in detail. The application of photocatalysts in treating persistent organic pollutants such as pesticide, pharmaceutical compounds, oil and grease and textile in real wastewater was also discussed. Besides, a few photocatalytic reactors in pilot scale had been designed for the effort of commercializing the system. In addition, hybrid photocatalytic system integrating with membrane filtration together with their membrane fabrication methods had also been reviewed. This review outlined various types of heterogeneous photocatalysts, mechanism, synthesis methods of biomass supported photocatalyst, photocatalytic degradation of organic substances in real wastewater, and photocatalytic reactor designs and their operating parameters as well as the latest development of photocatalyst incorporated membrane.
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Affiliation(s)
- Weng Shin Koe
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000, Kajang, Selangor, Malaysia
| | - Jing Wen Lee
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000, Kajang, Selangor, Malaysia
| | - Woon Chan Chong
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000, Kajang, Selangor, Malaysia.
| | - Yean Ling Pang
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000, Kajang, Selangor, Malaysia
| | - Lan Ching Sim
- Department of Chemical Engineering, Lee Kong Chian Faculty of Engineering and Science, Universiti Tunku Abdul Rahman, Jalan Sungai Long, Bandar Sungai Long, Cheras, 43000, Kajang, Selangor, Malaysia
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Chauhan N, Singh V, Kumar S, Dhiman RL. Influence of Nickel, Silver, and Sulphur Doping on the Photocatalytic Efficiency of Mesoporous ZnO Nanoparticles. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/s13369-019-04291-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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63
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Zhang X, Gao Y, Nengzi LC, Li B, Gou J, Cheng X. Synthesis of SnS/TiO2 nano-tube arrays photoelectrode and its high photoelectrocatalytic performance for elimination of 2,4,6-trichlorophenol. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.115742] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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64
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Shkir M, Hamdy MS, AlFaify S. A facile one pot flash combustion synthesis of ZnO nanoparticles and their characterizations for photocatalytic applications. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.084] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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65
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Cao Z, Liu C, Chen D, Liu J. Preparation of an Au-TiO 2 photocatalyst and its performance in removing phycocyanin. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 692:572-581. [PMID: 31539964 DOI: 10.1016/j.scitotenv.2019.07.117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/05/2019] [Accepted: 07/08/2019] [Indexed: 06/10/2023]
Abstract
A novel TiO2 photocatalyst (Au-TiO2 composite film) with enhanced photocatalytic activity has been synthesized, characterized and its performance in the removal of phycocyanin (PC) was investigated. The results show that the Au-TiO2 composite film has a lower electron-hole recombination rate, wider optical response range and high electron transfer rate. The photocatalytic activity of the as-prepared Au-TiO2 composite photocatalyst was observed to be enhanced with the removal efficiency of PC and dissolved organic nitrogen found to be 96.7% and 59%, respectively using the UV/Au-TiO2 process. In addition, the combination of photocatalytic pretreatment and coagulation can achieve an enhanced removal efficiency. The Au-TiO2 photocatalyst was found to decrease the dichloroacetonitrile formation potential (105.9 to 79.3 μg/L), however, it exacerbated the production of trichloromethane and dichloroacetamide beyond their initial levels (116.7 to 224.9 μg/L and 2.27 to 2.31 μg/L, respectively). The divergent trends of these disinfection by-products are due to the fundamental differences in the precursor material.
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Affiliation(s)
- Zhen Cao
- College of Environment, Hohai University, Nanjing 210098, China
| | - Cheng Liu
- College of Environment, Hohai University, Nanjing 210098, China; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098, China.
| | - Danwen Chen
- College of Environment, Hohai University, Nanjing 210098, China
| | - Jiaqi Liu
- College of Environment, Hohai University, Nanjing 210098, China
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67
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Thorat N, Yadav A, Yadav M, Gupta S, Varma R, Pillai S, Fernandes R, Patel M, Patel N. Ag loaded B-doped-g C 3N 4 nanosheet with efficient properties for photocatalysis. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 247:57-66. [PMID: 31229786 DOI: 10.1016/j.jenvman.2019.06.043] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 06/07/2019] [Accepted: 06/09/2019] [Indexed: 06/09/2023]
Abstract
Three material engineering strategies in the form of doping (Boron-doping), nanostructuring (nanosheet (NS) formation) and decorating with plasmonic nanoparticles (loading with Ag metal), were integrated to improve the photocatalytic activity of graphitic carbon nitride (gC3N4). Concentrations of B-doping and Ag-loading were optimized to maximize the catalytic performance in the final nanocomposite of Ag-loaded B-doped gC3N4 NS. Combined effect of all three strategies successfully produced over 5 times higher rate towards degradation of organic dye pollutant, when compared to unmodified bulk gC3N4. Detailed characterization results revealed that incorporation of B in gC3N4 matrix reduces the band gap to increase the visible light absorption, while specific surface area is significantly enhanced upon formation of NS. Decoration of Ag nanoparticles (NPs) on B-doped gC3N4 NS assists in fast transfer of photogenerated electrons from gC3N4 to Ag NPs owing to the interfacial electric field across the junctions and thus reduces the recombination process. Investigations on individual strategies revealed that decoration of Ag NPs to induce better charge separation, is the most effective route for enhancing the photocatalytic activity.
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Affiliation(s)
- Nirmala Thorat
- Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India
| | - Asha Yadav
- Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India.
| | - Manisha Yadav
- National Centre for Nanosciences & Nanotechnology, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India
| | - Suraj Gupta
- School of Engineering, University of Liverpool, Liverpool, L69 3GH, UK
| | - Ranjana Varma
- Department of Chemistry, Institution of Chemical Technology, Matunga, 400 208, India
| | - Saju Pillai
- Materials Science and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, Kerala, India
| | - Rohan Fernandes
- Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India
| | - Maulik Patel
- School of Engineering, University of Liverpool, Liverpool, L69 3GH, UK
| | - Nainesh Patel
- Department of Physics, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India; National Centre for Nanosciences & Nanotechnology, University of Mumbai, Vidyanagari, Santacruz (E), Mumbai, 400098, India.
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Mohamed MA, M. Zain M, Jeffery Minggu L, Kassim MB, Jaafar J, Saidina Amin NA, Mastuli MS, Wu H, Wong RJ, Ng YH. Bio-inspired hierarchical hetero-architectures of in-situ C-doped g-C3N4 grafted on C, N co-doped ZnO micro-flowers with booming solar photocatalytic activity. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.05.003] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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69
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Monocrotophos pesticide effectively removed by novel visible light driven Cu doped ZnO photocatalyst. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111923] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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70
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The Influence of pH on Phase and Morphology of BiOIO3 Nanoplates Synthesized by Microwave-Assisted Method and Their Photocatalytic Activities. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01282-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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71
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Nguyen CH, Juang RS. Efficient removal of methylene blue dye by a hybrid adsorption–photocatalysis process using reduced graphene oxide/titanate nanotube composites for water reuse. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.03.054] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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72
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Nguyen CH, Juang RS. Efficient removal of cationic dyes from water by a combined adsorption-photocatalysis process using platinum-doped titanate nanomaterials. J Taiwan Inst Chem Eng 2019. [DOI: 10.1016/j.jtice.2019.03.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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73
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On the possibility of ferromagnetism and improved dye-sensitized solar cells efficiency in TiO2/ZnO core/shell nanostructures. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.04.042] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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74
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Sonker RK, Yadav BC, Gupta V, Tomar M. Fabrication and characterization of ZnO-TiO 2-PANI (ZTP) micro/nanoballs for the detection of flammable and toxic gases. JOURNAL OF HAZARDOUS MATERIALS 2019; 370:126-137. [PMID: 30528466 DOI: 10.1016/j.jhazmat.2018.10.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 09/14/2018] [Accepted: 10/05/2018] [Indexed: 05/26/2023]
Abstract
The present paper reports the in-situ chemical polymerization of nanocomposites thin film composed by titanium dioxide (TiO2), zinc oxide (ZnO) and polyaniline (PANI). It was found that nanocomposites sensor is highly selective and shows response to low concentration. To improve the sensing response characteristics of ZT thin film, PANI is incorporated. Thin film based LPG sensor of ZnO-TiO2-PANI composite was fabricated by spin coating of ZnO-TiO2 nanoparticles doped with PANI over inter digital electrodes (IDEs). The thin film was characterized by using XRD, SEM, TEM, UV-vis, BET and FTIR. It was also tested for gas sensing properties of LPG/NO2 which are well known flammable and toxic gases. The measured response for ZnO-TiO2-PANI based sensor was 87 for 2000 ppm of LPG and 412 for 20 ppm of NO2 at room temperature towards other testing gases together with Acetone, IPA, NH3 and CO2.
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Affiliation(s)
- Rakesh K Sonker
- Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India; Nanomaterials and Sensor Research Laboratory, Department of Applied Physics, Babasaheb Bhimrao Ambedkar University, Lucknow, 226025, U.P., India.
| | - B C Yadav
- Nanomaterials and Sensor Research Laboratory, Department of Applied Physics, Babasaheb Bhimrao Ambedkar University, Lucknow, 226025, U.P., India
| | - Vinay Gupta
- Department of Physics and Astrophysics, University of Delhi, Delhi, 110007, India
| | - Monika Tomar
- Department of Physics, Miranda House, University of Delhi, Delhi, 110007, India
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75
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Galedari M, Mehdipour Ghazi M, Rashid Mirmasoomi S. Photocatalytic process for the tetracycline removal under visible light: Presenting a degradation model and optimization using response surface methodology (RSM). Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.03.031] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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76
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Bai L, Wang S, Wang Z, Hong E, Wang Y, Xia C, Wang B. Kinetics and mechanism of photocatalytic degradation of methyl orange in water by mesoporous Nd-TiO 2-SBA-15 nanocatalyst. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 248:516-525. [PMID: 30831348 DOI: 10.1016/j.envpol.2019.02.052] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 02/07/2019] [Accepted: 02/17/2019] [Indexed: 06/09/2023]
Abstract
High-efficiency nanophotocatalysts with large specific surface areas have a broad range of application prospects in the catalytic oxidation treatment of organic pollutants in wastewater. A chemical method was used to synthesize a TiO2 nanophotocatalyst with a mesoporous structure upon which a rare earth metal (Nd) was deposited, namely Nd-TiO2-SBA-15 (NTS). The prepared NTS was characterized using X-ray diffractometry, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectrometry. The photocatalytic mechanism was explored using scavenger experiments with photoinduced carriers combined with total organic carbon and UV-Vis measurements. At the same time, the kinetic properties of the NTS photocatalytic degradation of methyl orange (MO) were evaluated. The results showed that the deposition of TiO2 nanoparticles on the surface of the SBA-15 molecular sieve did not change the mesoporous structure, and Nd was uniformly distributed on the surface of the nanophotocatalyst. The photogenerated holes of the NTS played an important role in the photocatalysis process. In addition, the synthesized NTS had good adaptability in the range of pH 2-10. At pH 4, the reaction rate constant (k) of the MO photocatalytic degradation by NTS was 0.011825 mg·(L·min)-1, and the adsorption equilibrium constant (K) was 0.051359 L mg-1. In addition, the photocatalytic degradation rate of MO by NTS remained above 70%, even when the NTS was recycled four times. The NTS showed a good performance after recycling. This work provides a good foundation for the large-scale application of NTS.
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Affiliation(s)
- Liming Bai
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang Province, 161000, China
| | - Shuo Wang
- College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar, Heilongjiang Province, 161000, China
| | - Zhiyu Wang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
| | - Enlv Hong
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China
| | - Yu Wang
- Pharmacy Department, Qiqihar Medical University, Qiqihar, Heilongjiang Province, 161000, China
| | - Chunhui Xia
- Pharmacy Department, Qiqihar Medical University, Qiqihar, Heilongjiang Province, 161000, China
| | - Baiqi Wang
- Department of Occupational and Environmental Health, School of Public Health, Tianjin Medical University, Tianjin, 300070, China; Tianjin Key Laboratory of Environment, Nutrition and Public Health, Tianjin, 300070, China; National Demonstration Center for Experimental Preventive Medicine Education (Tianjin Medical University), Tianjin 300070, P. R. China; The Key Laboratory of Modern Toxicology of Ministry of Education, Nanjing Medical University, Nanjing, 211166, Jiangsu, China.
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77
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Zhao H, Kang J, Nan H, Yang G, Wei H, Chen H, Wang G, Lin H. Preparation and Enhanced UV-Visible Light Photoelectrocatalytic Activity of TiO 2
-Fe 2
O 3
/Cu Ternary Nanocomposites. ChemistrySelect 2019. [DOI: 10.1002/slct.201803345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hexi Zhao
- School of Chemistry and Chemical Engineering; Qinghai University; Xining 810016 China
| | - Jie Kang
- Qinghai Provincial Key Laboratory of New Light Alloys; Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming; Qinghai University; Xining 810016 China
| | - Hui Nan
- Qinghai Provincial Key Laboratory of New Light Alloys; Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming; Qinghai University; Xining 810016 China
| | - Guijun Yang
- School of Chemistry and Chemical Engineering; Qinghai University; Xining 810016 China
| | - Haomin Wei
- Qinghai Provincial Key Laboratory of New Light Alloys; Qinghai Provincial Engineering Research Center of High Performance Light Metal Alloys and Forming; Qinghai University; Xining 810016 China
| | - Huiyuan Chen
- School of Chemistry and Chemical Engineering; Qinghai University; Xining 810016 China
| | - Gang Wang
- School of Chemistry and Chemical Engineering; Qinghai Nationalities University; Xining 810007 China
| | - Hong Lin
- State Key Laboratory of New Ceramics & Fine Processing; School of Materials Science and Engineering; Tsinghua University; Beijing 100084 China
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78
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Siwińska-Ciesielczyk K, Bartlewicz O, Bartczak P, Piasecki A, Jesionowski T. Functional titania–silica/chlorophyllin hybrids: design, fabrication, comprehensive physicochemical characteristic and photocatalytic test. ADSORPTION 2019. [DOI: 10.1007/s10450-019-00035-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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79
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Tahir MB, Sagir M, Shahzad K. Removal of acetylsalicylate and methyl-theobromine from aqueous environment using nano-photocatalyst WO 3-TiO 2 @g-C 3N 4 composite. JOURNAL OF HAZARDOUS MATERIALS 2019; 363:205-213. [PMID: 30308359 DOI: 10.1016/j.jhazmat.2018.09.055] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 05/14/2023]
Abstract
Highly efficient, visible light-driven and a novel ternary hybrid photocatalyst WO3-TiO2-g-C3N4 with robust stabilities and versatile properties has been synthesized through facile hydrothermal method. This study considers the photo-degradation of aspirin (acetylsalicylate) and caffeine (methyl-theobromine) via photocatalysts (WO3, WO3/TiO2, and WO3/TiO2/g-C3N4 (WTCN) composite) under visible-light irradiation. The SEM and TEM images show the formation of WO3 nanoparticles with orthorhombic structure and average particle size of 65 nm. The photocatalyst WTCN composite possesses higher-catalytic activity when compared to that of WO3 and WO3/TiO2 for degradation of aspirin and caffeine. The incorporation of g-C3N4 in WO3/TiO2 composite exhibited significant influence on the photocatalytic performance for both pollutants. Excellent photocatalytic performance of WTCN composite was observed owing to hydroxyl radical (OH) and superoxide radical (O2-) as main active species. The enhanced photocatalytic activity of WTCN composite can be attributed to following three reasons: (1) extended visible-light absorption; (2) extended surface area; (3) efficient charge-separation due to synergistic effects between g- and WO3/TiO2 composite. The removal efficiency of aspirin and caffeine (Methyl theobromine) could be achieved as much as 98% and 97% for acetylsalicylate and methyl-theobromine using WTCN composite material, respectively. This study could provide new insights into the synthesis of novel WO3-based materials for environmental and energy applications.
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Affiliation(s)
- M B Tahir
- Department of Physics, Faculty of Sciences, University of Gujrat, Gujrat, 50700, Pakistan.
| | - M Sagir
- Department of Chemical Engineering, Faculty of Engineering, University of Gujrat, Gujrat, 50700, Pakistan
| | - K Shahzad
- Center of Excellence in Environmental Studies, King Abdulaziz University, Jeddah, 21589, Saudi Arabia.
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80
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Kubiak A, Siwińska-Ciesielczyk K, Bielan Z, Zielińska-Jurek A, Jesionowski T. Synthesis of highly crystalline photocatalysts based on TiO2 and ZnO for the degradation of organic impurities under visible-light irradiation. ADSORPTION 2019. [DOI: 10.1007/s10450-019-00011-x] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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81
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Taghipour S, Hosseini SM, Ataie-Ashtiani B. Engineering nanomaterials for water and wastewater treatment: review of classifications, properties and applications. NEW J CHEM 2019. [DOI: 10.1039/c9nj00157c] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Based on their characteristics and applicability, a new category of NMs is proposed for water and wastewater treatment.
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Affiliation(s)
- Shabnam Taghipour
- Department of Civil Engineering
- Sharif University of Technology
- Tehran
- Iran
| | | | - Behzad Ataie-Ashtiani
- Department of Civil Engineering
- Sharif University of Technology
- Tehran
- Iran
- National Centre for Groundwater Research & Training and College of Science & Engineering
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82
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Pirsaheb M, Asadi A, Sillanpää M, Farhadian N. Application of carbon quantum dots to increase the activity of conventional photocatalysts: A systematic review. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.064] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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83
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Han J, Li Y, Yang L, Li T, Luo Y, Yang L, Luo S. Mesoporous TiO 2 with WO 3 functioning as dopant and light-sensitizer: A highly efficient photocatalyst for degradation of organic compound. JOURNAL OF HAZARDOUS MATERIALS 2018; 358:44-52. [PMID: 29960933 DOI: 10.1016/j.jhazmat.2018.06.039] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 06/16/2018] [Accepted: 06/18/2018] [Indexed: 06/08/2023]
Abstract
The suitable doping or modification on TiO2 holds promise for improving charge separation and extending light absorption range. Here, WO3 modifying reduced band gap mesoporous TiO2 (WO3/RM-TiO2) due to WO3 doping was successfully fabricated by immersing mesoporous TiO2 nanoparticles in the peroxotungstic acid sol with controllable reaction time (0-1 h). The W6+ ions were first incorporated into the TiO2 lattice to form WOTi bonds, resulting in the formation of WO3 doping TiO2. Then, WO3 nanoparticles gradually formed and attached on the TiO2 surface, constructing a novel heterojunction catalyst with WO3 serving as both dopant and light-sensitizer for TiO2. Photocatalytic activity of the resulting WO3/RM-TiO2 depends on the immersing duration in the peroxotungstic acid. The BET analysis shows that 0.5 h-WO3/RM-TiO2 has the largest pore volume of 0.491 cm3 g-1 and the highest surface area of 82.3 m2 g-1, whereas these values decline with prolonged immersing duration. As expected, the optimal efficiency in removing p-nitrophenol (PNP) is achieved over 0.5 h-WO3/RM-TiO2 under visible light irradiation, which is 2.33 times that of the unmodified M-TiO2. This should be attributed to the suitable WO3 doping and WO3 modification.
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Affiliation(s)
- Jingsong Han
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Yue Li
- School of Materials and Chemical Engineering, Henan University of Engineering, Zhengzhou, Henan 451191, PR China
| | - Liming Yang
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Tingting Li
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Yan Luo
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China
| | - Lixia Yang
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
| | - Shenglian Luo
- High Level Laboratory of Jiangxi Province for Persistent Pollutants Control, Recycle and Reuse, Nanchang Hangkong University, Nanchang 330063, PR China; College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063, PR China.
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84
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Ahmari H, Zeinali Heris S, Khayyat MH. Experimental investigation of new photocatalytic continuous coaxial cylinder reactor for elimination of linear alkylbenzene sulfonic acid from waste water using nanotechnology. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.05.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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85
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Behzadifard Z, Shariatinia Z, Jourshabani M. Novel visible light driven CuO/SmFeO3 nanocomposite photocatalysts with enhanced photocatalytic activities for degradation of organic pollutants. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.04.126] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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86
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Gashtasbi F, Yengejeh RJ, Babaei AA. Photocatalysis assisted by activated-carbon-impregnated magnetite composite for removal of cephalexin from aqueous solution. KOREAN J CHEM ENG 2018. [DOI: 10.1007/s11814-018-0061-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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87
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TiO₂-ZnO Binary Oxide Systems: Comprehensive Characterization and Tests of Photocatalytic Activity. MATERIALS 2018; 11:ma11050841. [PMID: 29783700 PMCID: PMC5978218 DOI: 10.3390/ma11050841] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/09/2018] [Accepted: 05/14/2018] [Indexed: 11/17/2022]
Abstract
A series of TiO2-ZnO binary oxide systems with various molar ratios of TiO2 and ZnO were prepared using a sol-gel method. The influence of the molar ratio and temperature of calcination on the particle sizes, morphology, crystalline structure, surface composition, porous structure parameters, and thermal stability of the final hybrids was investigated. Additionally, to confirm the presence of characteristic surface groups of the material, Fourier transform infrared spectroscopy was applied. It was found that the crystalline structure, porous structure parameters, and thermal stability were determined by the molar ratio of TiO2 to ZnO and the calcination process for the most part. A key element of the study was an evaluation of the photocatalytic activity of the TiO2-ZnO hybrids with respect to the decomposition of C.I. Basic Blue 9, C.I. Basic Red 1, and C.I. Basic Violet 10 dyes. It was found that the TiO2-ZnO material obtained with a molar ratio of TiO2:ZnO = 9:1 and calcined at 600 °C demonstrates high photocatalytic activity in the degradation of the three organic dyes when compared with pristine TiO2. Moreover, an attempt was made to describe equilibrium aspects by applying the Langmuir-Hinsherlwood equation.
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88
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Preparation of RGO-P25 Nanocomposites for the Photocatalytic Degradation of Ammonia in Livestock Farms. Catalysts 2018. [DOI: 10.3390/catal8050189] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
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