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Abbasi M, Aziz R, Rafiq MT, Bacha AUR, Ullah Z, Ghaffar A, Mustafa G, Nabi I, Hayat MT. Efficient performance of InP and InP/ZnS quantum dots for photocatalytic degradation of toxic aquatic pollutants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:19986-20000. [PMID: 38368301 DOI: 10.1007/s11356-024-32479-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Accepted: 02/10/2024] [Indexed: 02/19/2024]
Abstract
In recent years, the growing concern over the presence of toxic aquatic pollutants has prompted intensive research into effective and environmentally friendly remediation methods. Photocatalysis using semiconductor quantum dots (QDs) has developed as a promising technology for pollutant degradation. Among various QD materials, indium phosphide (InP) and its hybrid with zinc sulfide (ZnS) have gained considerable attention due to their unique optical and photocatalytic properties. Herein, InP and InP/ZnS QDs were employed for the removal of dyes (crystal violet, and congo red), polyaromatic hydrocarbons (pyrene, naphthalene, and phenanthrene), and pesticides (deltamethrin) in the presence of visible light. The degradation efficiencies of crystal violet (CV) and congo red (CR) were 74.54% and 88.12% with InP, and 84.53% and 91.78% with InP/ZnS, respectively, within 50 min of reaction. The InP/ZnS showed efficient performance for the removal of polyaromatic hydrocarbons (PAHs). For example, the removal percentage for naphthalene, phenanthrene, and pyrene was 99.8%, 99.6%, and 88.97% after the photocatalytic reaction. However, the removal percentage of InP/ZnS for pesticide deltamethrin was 90.2% after 90 min light irradiation. Additionally, advanced characterization techniques including UV-visible spectrophotometer (UV-Vis), photoluminescence (PL), X-ray diffractometer (XRD), energy-dispersive spectrometer (EDS) elemental mapping, transmission electron microscopy (TEM), and thermogravimetric analysis (TGA) were used to analyze the crystal structure, morphology, and purity of the fabricated materials in detail. The particle size results obtained from TEM are in the range of 2.28-4.60 nm. Both materials (InP and InP/ZnS) exhibited a spherical morphology, displaying distinct lattice fringes. XRD results of InP depicted lattice planes (111), (220), and (311) in good agreement with cubic geometry. Furthermore, the addition of dopants was discovered to enhance the thermal stability of the fabricated material. In addition, QDs exhibited efficacy in the breakdown of PAHs. The analysis of their fragmentation suggests that the primary mechanism for PAHs degradation is the phthalic acid pathway.
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Affiliation(s)
- Maryam Abbasi
- Department of Environmental Sciences, International Islamic University, Islamabad, 44000, Pakistan
| | - Rukhsanda Aziz
- Environmental Science Program, Centre for Interdisciplinary Research in Basic Sciences, International Islamic University, Islamabad, 44000, Pakistan
| | - Muhammad Tariq Rafiq
- Environmental Science Program, Centre for Interdisciplinary Research in Basic Sciences, International Islamic University, Islamabad, 44000, Pakistan
| | - Aziz Ur Rahim Bacha
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, People's Republic of China.
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, People's Republic of China.
| | - Zahid Ullah
- State Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences, Wuhan, 430074, China
| | - Abdul Ghaffar
- Isotope Application Division, PINSTECH, Nilore, Islamabad, Pakistan
| | - Ghulam Mustafa
- Department of Chemistry, University of Okara, Okara, Pakistan
| | - Iqra Nabi
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzhen, 518055, People's Republic of China
- Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, People's Republic of China
| | - Malik Tahir Hayat
- Department of Environmental Sciences, COMSATS University Islamabad, Abbottabad Campus, Abbottabad, 22060, Pakistan
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Lang T, Yang J, Liu Y, Jiang A, Wu J, Chen J, Xie T, Qiu Q, Liang T. Dynamic properties of photogenerated charge in BiOBr/Bi2WO6/GO ternary composites and its application for organic pollutants degradation. J Chem Phys 2023; 159:164707. [PMID: 37888760 DOI: 10.1063/5.0167021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Accepted: 09/10/2023] [Indexed: 10/28/2023] Open
Abstract
Carbon-based Materials have been extensively researched for their prospect in the fields of environment and energy, especially for graphene oxide (GO). In this work, a novel sodium dodecyl sulfate (SDS)-assisted synthesis of BiOBr/Bi2WO6/GO ternary composite has been synthesized successfully by a handy hydrothermal method. Photoluminescence, Photocurrent, Electrochemical Impedance Spectroscopy, surface photovoltage and transient photovoltage measurements illustrate that construction of p-n BiOBr/Bi2WO6 heterojunction leads to the obviously enhancement of charge separation efficiency, and the photogenerated electrons trapped by GO can effectively inhibit the recombination process of photogenerated charge, resulting in the improvement of charge separation efficiency and the longer lifetime of photogenerated carriers for BiOBr/Bi2WO6/GO. The characterization of structure and morphology indicate that role of GO can also improve the visible light absorption range, and the SDS-assisted synthesis can reduce the size of particle in the composite and enhances the specific surface area of the composite by regulating the particle size and agglomeration. Under optimal conditions, BiOBr/Bi2WO6/GO (SDS) has the outstanding photocatalytic degradation performance and the degradation rate constants for oxytetracycline, tetracycline hydrochloride, methylene blue and rhodamine are 0.056, 0.057, 0.103 and 0.414 min-1, respectively. Notably, the degradation rate constants obtained by BiOBr/Bi2WO6/GO (SDS) are more ten times higher than that of pure BiOBr and Bi2WO6. The possible mechanism of photocatalytic degradation was suggested for BiOBr/Bi2WO6/GO based on the dynamic properties of photogenerated charge and reactive oxidation species results. Surprisingly, the recyclability of the BiOBr/Bi2WO6/GO (SDS) composite obtained from the cyclic experiments has laid a foundation for the study of efficient and stable photocatalysts.
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Affiliation(s)
- Tian Lang
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
| | - Jiayan Yang
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
| | - Yuanyuan Liu
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
| | - Awen Jiang
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
| | - Jing Wu
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
- Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
| | - Jie Chen
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
| | - Tengfeng Xie
- College of Chemistry, Jilin University, Changchun 130012, People's Republic of China
| | - Qingqing Qiu
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
| | - Tongxiang Liang
- Engineering Research Center for Hydrogen Energy Materials and Devices, College of Rare Earths, Jiangxi University of Science and Technology, 86 Hong Qi Road, Ganzhou 341000, People's Republic of China
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Sayed MA, Ahmed M, El-Shahat M, El-Sewify IM. Mesoporous polyaniline/SnO2 nanospheres for enhanced photocatalytic degradation of bio-staining fluorescent dye from an aqueous environment. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109326] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Ding C, Fu K, Wu M, Gong S, Liu J, Shi J, Deng H. Photocatalytic performance and mechanism of AgI/Ag/ZnO composites as catalysts for the visible-light-driven degradation of naproxen. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113283] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Improving the Performance of ZnS Photocatalyst in Degrading Organic Pollutants by Constructing Composites with Ag 2O. NANOMATERIALS 2021; 11:nano11061451. [PMID: 34070788 PMCID: PMC8230231 DOI: 10.3390/nano11061451] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 12/30/2022]
Abstract
ZnS is a promising photocatalyst in water purification, whereas its low photon efficiency and poor visible-light response restrict its application. Constructing composites may help solve these problems. In this work, Ag2O was introduced to ZnS for the first time based on their energy band characteristics to form a novel ZnS/Ag2O composite photocatalyst. In the model reaction of degrading methylene blue, the as-designed catalyst exhibited high catalytic activity among a series of ZnS-based composite photocatalysts under similar conditions. The catalytic rate constant was up to 0.138 min−1, which is 27.4- and 15.6-times higher than those of ZnS and Ag2O. This composite degraded 92.4% methylene blue in 50 min, while the ratios were 31.9% and 68.8% for ZnS and Ag2O. Catalytic mechanism study based on photoluminescence and radical-scavenging experiments revealed that the enhanced photocatalytic activity was attributed to the composite structure of ZnS/Ag2O. The structure not only facilitated the separation and transmission of photogenerated carriers but also extended the light response range of the catalyst. The as-designed ZnS/Ag2O composite is promising in degrading organic pollutants in water.
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Comparison of Ag and AgI-Modified ZnO as Heterogeneous Photocatalysts for Simulated Sunlight Driven Photodegradation of Metronidazole. Catalysts 2020. [DOI: 10.3390/catal10091097] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Ag and AgI-modified ZnO composites (Ag/ZnO and AgI/ZnO) were synthesized in facile ways. The photocatalysts were used for the photodegradation of metronidazole (MNZ) under the irradiation of simulated sunlight. The results of experiments showed that both Ag/ZnO and AgI/ZnO had a specific molar ratio to reach the best performance. Ag/ZnO performed better in the photodegradation of MNZ than AgI/ZnO under the same conditions. The reaction rate constant of AgI/ZnO was less affected by the variation of initial concentration of MNZ or pH values. The main reactive oxygen species of the photocatalytic process are OH, O2− and h+, but the free radicals which play the most critical part differ in Ag/ZnO and AgI/ZnO. Several intermediates were revealed by LC–MS/MS analysis. The stability of the photocatalysts was evaluated by a series of repeated MNZ photodegradation experiments. The results showed that AgI/ZnO had better stability than Ag/ZnO.
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Guo F, Huang X, Chen Z, Ren H, Li M, Chen L. MoS 2 nanosheets anchored on porous ZnSnO 3 cubes as an efficient visible-light-driven composite photocatalyst for the degradation of tetracycline and mechanism insight. JOURNAL OF HAZARDOUS MATERIALS 2020; 390:122158. [PMID: 32004762 DOI: 10.1016/j.jhazmat.2020.122158] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/14/2020] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
In this study, MoS2/ZnSnO3 (MS-ZSO) composite photocatalyst with loading MS nanosheets onto the surface of porous ZSO microcubes was synthesized using a simple hydrothermal route. The prepared MS-ZSO composite can be easily excited under visible light, and 3 % MS-ZSO exhibits an outstanding photo-degradation (>80 % in 60 min) and mineralization performance (>42 % in 60 min) of the tetracycline. A remarkable improvement in the photocatalytic activity of MS-ZSO composite derived from a positive synergistic effect of well-matched energy level positions, increasement the absorption of visible light, prolonged life time decay and improved interfacial charge transfer between MS and ZSO. In-depth investigation on charge carrier separation mechanism toward MS/ZSO composite under visible light was proposed, which was further evidenced by capture experiments and electron spin resonance (ESR) techniques. Furthermore, the corresponding intermediates of tetracycline degradation over MS-ZSO composites were inspected by liquid chromatography-mass spectrometry (LC-MS) analysis, and the possible degradation paths were proposed.
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Affiliation(s)
- Feng Guo
- School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, 212003, PR China.
| | - Xiliu Huang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, PR China
| | - Zhihao Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, PR China
| | - Hongji Ren
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, PR China
| | - Mingyang Li
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, PR China
| | - Lizhuang Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, PR China.
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Shanmugam V, Jeyaperumal KS, Mariappan P, Muppudathi AL. Fabrication of novel g-C3N4 based MoS2 and Bi2O3 nanorod embedded ternary nanocomposites for superior photocatalytic performance and destruction of bacteria. NEW J CHEM 2020. [DOI: 10.1039/d0nj02101f] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Highly efficient g-C3N4 based MoS2/Bi2O3 nanorod embedded novel (g-C3N4/MoS2/Bi2O3) nanocomposites were effectively fabricated by a hydrothermal–calcination method. The schematic depiction is illustrating the plausible mechanism of charge separation and degradation of pollutants under visible-light exposure by a g-C3N4/MoS2/Bi2O3 photocatalyst.
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Affiliation(s)
- Vignesh Shanmugam
- Materials Science Research Laboratory
- Department of Physics
- Periyar University
- Salem 636 011
- India
| | | | - Pandiaraman Mariappan
- PG and Research Department of Physics
- Raja Doraisingam Govt. Arts College
- Sivagangai 630 561
- India
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9
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Zeng Y, Guo N, Xu X, Yu Y, Wang Q, Wang N, Han X, Yu H. Degradation of bisphenol a using peroxymonosulfate activated by WO 3@MoS 2/Ag hollow nanotubes photocatalyst. CHEMOSPHERE 2019; 227:589-597. [PMID: 31009865 DOI: 10.1016/j.chemosphere.2019.04.067] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/25/2019] [Accepted: 04/09/2019] [Indexed: 06/09/2023]
Abstract
WO3@MoS2/Ag (HW@MA) hollow tubes were successfully engineered to photodegrade bisphenol A (BPA) combined with peroxymonosulfate (PMS) for the first time. XRD, XPS, TEM and SEM were conducted. The HW@MA tubes present excellent photocatalytic performance on the removal of BPA. The intermediate products of BPA were investigated by GC-MS analysis and the degradation pathway was proposed. To explore the transferred mechanism of photoproduced carriers, the electron paramagnetic resonance (EPR) technique was carried out. The results revealed that the superoxide radical (O2-), hydroxyl radical (OH), sulfate radical (SO4-) were the main active radicals. Moreover, the formed schottky junctions enhanced the separation efficiency of photoinduced electron-hole pairs. Besides, the effect of the photocatalysts' dosage, PMS concentration, pH of the initial solution and co-existing anions on the BPA degradation were investigated.
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Affiliation(s)
- Ying Zeng
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China; University of Chinese Academy of Sciences, Beijing, 100039, China
| | - Na Guo
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China
| | - Xingjian Xu
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China; Hinggan League Academy of Agricultural and Animal Husbandry, Ulanhot, Inner Mongolia, 137400, China
| | - Yong Yu
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China
| | - Quanying Wang
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China
| | - Na Wang
- Horqin Right-wing Banner Agriculture and Animal Husbandry and Science and Technology Bureau of Agricultural Technology Extension Center, Ulanhot, Inner Mongolia, 137400, China
| | - Xuerong Han
- Changchun University of Science and Technology, Changchun, 130022, China.
| | - Hongwen Yu
- Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, 4888 Shengbei Rd, Changchun, 130102, China.
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One-Step Synthesis of Ag@TiO₂ Nanoparticles for Enhanced Photocatalytic Performance. NANOMATERIALS 2018; 8:nano8121032. [PMID: 30545034 PMCID: PMC6316728 DOI: 10.3390/nano8121032] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 12/03/2018] [Accepted: 12/10/2018] [Indexed: 01/02/2023]
Abstract
Polyamide network polymers (PNP) modified TiO2 nanoparticles (NPs) were decorated with Ag NPs in hydrothermal gel method, forming one-step synthesized photocatalysts, Ag@TiO2 NPs. The effect of PNP and the amount of Ag NPs added were investigated in this work. PNP acted as a nanocage to prevent TiO2 aggregation and capture Ag accurately, which could effectively control product sizes and improve dispersibility in solvents. Simultaneously, TiO2 NPs modified with Ag NPs exhibited remarkable photocatalytic effects. One-step synthesis simplified the experimental process and avoided the agglomeration of silver ions during the secondary reaction, achieving the purpose of uniform distribution at a specific location of TiO2 NPs. The prepared Ag@TiO2 NPs-0.5 could remove 79.49% of Methyl Orange (MO) after 3 h of ultraviolet light irradiation, which was 2.7 times higher than the reaction rate of pure TiO2 NPs. It also exhibited good photoactivity under Visible light conditions. Moreover, the mineralization rate of MO over the Ag@TiO2 NPs-0.5 could be up to 72.32% under UV light and 47.08% under Visible light irradiation, which revealed that the prepared catalysts could effectively degrade most of the MO to CO2 and H2O. The samples also demonstrated the excellent stability and easy recyclability with over 90% of the original catalytic level for MO degradation. The photocatalysts studied also exerted broad application prospects such as photovoltaic hydrogen production, electronic sensors and biomedicine.
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Liu Z, Wang G, Yang P. Selected growth of second phase on BiOBr facets via spatial charge separation towards enhanced photocatalysis activity. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.05.038] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Li JX, Hao ZC, Ren L, Cui GH. Synthesis and Characterization of 2D and 3D Zinc(II) Coordination Polymers with High Photocatalytic Activities for Removal of Methylene Blue Dye. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800291] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jun-Xuan Li
- College of Chemical Engineering; Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials; North China University of Science and Technology; No. 21 Bohai Road 063210 Caofeidian New-city Hebei P. R. China
| | - Zeng-Chuan Hao
- College of Chemical Engineering; Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials; North China University of Science and Technology; No. 21 Bohai Road 063210 Caofeidian New-city Hebei P. R. China
| | - Li Ren
- College of Chemical Engineering; Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials; North China University of Science and Technology; No. 21 Bohai Road 063210 Caofeidian New-city Hebei P. R. China
| | - Guang-Hua Cui
- College of Chemical Engineering; Hebei Key Laboratory for Environment Photocatalytic and Electrocatalytic Materials; North China University of Science and Technology; No. 21 Bohai Road 063210 Caofeidian New-city Hebei P. R. China
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Abbasi M, Rafique U, Murtaza G, Ashraf MA. Synthesis, characterisation and photocatalytic performance of ZnS coupled Ag2S nanoparticles: A remediation model for environmental pollutants. ARAB J CHEM 2018. [DOI: 10.1016/j.arabjc.2017.12.017] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Enhanced Photocatalytic Efficiency of TiO2 Membrane Decorated with Ag and Au Nanoparticles. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8060945] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Synthesis of the novel nanostructured AgI-BiOI/PAN composite photocatalyst with highly enhanced visible-light catalytic performances. J Photochem Photobiol A Chem 2018. [DOI: 10.1016/j.jphotochem.2018.02.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Sun Y, Shao C, Li X, Guo X, Zhou X, Li X, Liu Y. Hierarchical heterostructures of p-type bismuth oxychloride nanosheets on n-type zinc ferrite electrospun nanofibers with enhanced visible-light photocatalytic activities and magnetic separation properties. J Colloid Interface Sci 2018; 516:110-120. [DOI: 10.1016/j.jcis.2018.01.033] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 01/05/2018] [Accepted: 01/08/2018] [Indexed: 11/29/2022]
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Photophysical and Photocatalytic Properties of BiSnSbO₆ under Visible Light Irradiation. MATERIALS 2018; 11:ma11040491. [PMID: 29587420 PMCID: PMC5951337 DOI: 10.3390/ma11040491] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 02/02/2018] [Accepted: 03/15/2018] [Indexed: 11/16/2022]
Abstract
BiSnSbO₆ with strong photocatalytic activity was first fabricated by a high-temperature, solid-state sintering method. The resulting BiSnSbO₆ was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS). The results showed that BiSnSbO₆, with a pyrochlore structure and a cubic crystal system by a space group Fd3m, was well crystallized. The lattice parameter or the band gap of BiSnSbO₆ was 10.234594 Å or 2.83 eV. Compared with N-doped TiO₂, BiSnSbO₆ showed higher photocatalytic activity in the degradation of benzotriazole and rhodamine B. The apparent first-order rate constant for BiSnSbO₆ in the degradation of benzotriazole and rhodamine B was 0.0182 min-1 and 0.0147 min-1, respectively. On the basis of the scavenger experiment, during the photocatalytic process, the main active species were arranged in order of increasing photodegradation rate: •OH < •O₂- < h⁺. The removal rate of benzotriazole or rhodamine B was approximately estimated to be 100% with BiSnSbO₆ as a photocatalyst after 200 min visible-light irradiation. Plentiful CO₂ produced by the experiment indicated that benzotriazole or rhodamine B was continuously mineralized during the photocatalytic process. Finally, the possible photodegradation pathways of benzotriazole and rhodamine B were deduced.
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AgI/β-Ag 2 MoO 4 heterojunctions with enhanced visible-light-driven catalytic activity. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2017.10.018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Room-temperature synthesis of carnation-like ZnO@AgI hierarchical nanostructures assembled by AgI nanoparticles-decorated ZnO nanosheets with enhanced visible light photocatalytic activity. J Colloid Interface Sci 2017; 502:77-88. [DOI: 10.1016/j.jcis.2017.04.080] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 04/21/2017] [Accepted: 04/25/2017] [Indexed: 11/19/2022]
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Abstract
BiOXxY1−x (X, Y = Cl, Br, and I) solid solutions have been regarded as promising photocatalysts attributed to their unique layered structure, tunable band structure, and chemical and optical stability. In this study, BiOBrxI1−x nanoplate solid solutions with a high exposure of {001} crystal facets were prepared by a facile alcoholysis method at room temperature and atmospheric pressure. X-ray diffraction (XRD) peaks exhibited a slight shift to lower diffraction angle with the increase of I content in BiOBrxI1−x samples, which resulted in a gradual increase in their cell parameters. Field emission scanning electron microscopy (FESEM) and transmission electron microscope (TEM) images revealed that BiOBrxI1−x samples exhibited 2D plate-like structure with the in-plane wrinkles. The regular changes in optical absorption threshold and Eg value seen in UV-vis diffuse reflectance spectra (UV-vis DRS) indicated that the optical absorption property and band structure could be modulated by the formation of BiOBrxI1−x solid solutions. The photocatalytic degradation of active dye Rhodamine B (RhB) over BiOBrxI1−x solid solutions showed that BiOBr0.75I0.25 had the best photocatalytic activity. The RhB photodegradation processes followed a pseudo-first-order kinetic model. The synergistic effect of structural factors (including amount of exposed {001} facets, interlayer spacing of (001) plane, and energy-level position of the valence band) determined the photocatalytic performance of BiOBrxI1−x solid solutions.
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Sol–gel preparation, band structure, and photochemical activities of double perovskite A 2 NiWO 6 ( A = Ca, Sr) nanorods. J Taiwan Inst Chem Eng 2017. [DOI: 10.1016/j.jtice.2016.11.034] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Magnetic core-shell ZnFe2O4/ZnS nanocomposites for photocatalytic application under visible light. J Colloid Interface Sci 2017; 486:136-143. [DOI: 10.1016/j.jcis.2016.09.066] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 09/23/2016] [Accepted: 09/27/2016] [Indexed: 11/20/2022]
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Rajamohan S, Kumaravel V, Muthuramalingam R, Ayyadurai S, Abdel-Wahab A, Sub Kwak B, Kang M, Sreekantan S. Fe3O4–Ag2WO4: facile synthesis, characterization and visible light assisted photocatalytic activity. NEW J CHEM 2017. [DOI: 10.1039/c7nj03004e] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photo-generated charge carriers are effectively separated on a magnetic nano-composite (Fe3O4–Ag2WO4) surface under visible light irradiation.
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Affiliation(s)
| | - Vignesh Kumaravel
- Chemical Engineering Program
- Texas A&M University at Qatar
- Doha-23874
- Qatar
| | | | | | - Ahmed Abdel-Wahab
- Chemical Engineering Program
- Texas A&M University at Qatar
- Doha-23874
- Qatar
| | - Byeong Sub Kwak
- Department of Chemistry
- College of Science
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Misook Kang
- Department of Chemistry
- College of Science
- Yeungnam University
- Gyeongsan
- Republic of Korea
| | - Srimala Sreekantan
- School of Materials and Mineral Resources Engineering
- Engineering Campus
- Universiti Sains Malaysia
- Penang
- Malaysia
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