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Wu J, He T, Ma X, Li C, Han J, Wang L, Dong H, Zhang R, Wang Y. A novel immobilized horseradish peroxidase platform driven by visible light for the complete mineralization of sulfadiazine in water. Int J Biol Macromol 2023; 253:127239. [PMID: 37838127 DOI: 10.1016/j.ijbiomac.2023.127239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 09/21/2023] [Accepted: 10/02/2023] [Indexed: 10/16/2023]
Abstract
A novel immobilized enzyme driven by visible light was prepared and used for complete mineralization of antibiotics in water bodies. The immobilized enzyme was composed of carbon nitride modified by biochar (C/CN) and horseradish peroxidase (HRP), establishing the photo-enzyme coupling system with synergistic effect. Among them, the introduction of biochar not only improves the stability and loading capacity of the enzyme, but also improves the light absorption capacity and carrier separation efficiency of the photocatalyst. After the optimization of immobilization process, the solid load of HRP could reach 251.03 mg/g, and 85.03 % enzyme activity was retained after 18 days of storage at 4 °C. In the sulfadiazine (SDZ) degradation experiment, the degradation rate of HRP/C3/CN reached 71.21 % within 60 min, which was much higher than that of HRP (2.33 %), CN (49.78 %) and C3/CN (58.85 %). In addition, under the degradation of HRP/C/CN, the total organic carbon (TOC) removal rate of SDZ reached 53.14 %, which was 6.47 and 1.74 times that of CN and C3/CN, respectively. This study shows that the introduction of biochar is of great significance to the photo-enzyme cascade coupling system and provides a new strategy for the application of HRP&g-C3N4 system in wastewater treatment.
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Affiliation(s)
- Jiacong Wu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Ting He
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Xinnan Ma
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Chunmei Li
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Juan Han
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Lei Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Hongjun Dong
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Rongxian Zhang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China
| | - Yun Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, Jiangsu Province 212013, China.
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2
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Puri N, Gupta A. Water remediation using titanium and zinc oxide nanomaterials through disinfection and photo catalysis process: A review. ENVIRONMENTAL RESEARCH 2023; 227:115786. [PMID: 37004858 DOI: 10.1016/j.envres.2023.115786] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 03/23/2023] [Accepted: 03/27/2023] [Indexed: 05/08/2023]
Abstract
Various pesticides and organic compounds generated as a result of rapid industrialization and pharmaceutical companies pose a major threat to the environment. Novel photocatalysts based on zinc oxide and titanium oxide exhibit great potential towards absorption of these organic pollutants from wastewater. The photocatalysts possess various extraordinary properties like photocatalytic degradation potential, non-toxic and high stability. However, several limitations are also associated with the applications of these photocatalysts like poor affinity, particle agglomeration, high band gap and recovery issues. Hence, optimization is required to enhance their efficiency and at the same time make them cost effective and sustainable. The review covers the mechanism for water treatment, limitations and development of different modification strategies that improve the removal efficiency of titanium and zinc oxide based photocatalysts. Thus, further research in the field of photocatalysts can be encouraged for carrying out water remediation.
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Affiliation(s)
- Nidhi Puri
- Department of Applied Science and Humanities, Lloyd Institute of Engineering & Technology, Greater Noida, 201307, Uttar Pradesh, India
| | - Anjali Gupta
- School of Basic and Applied Science, Galgotias University, Greater Noida, 201310, Uttar Pradesh, India.
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3
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Wu Q, Chen L, Kuo DH, Li P, Abdeta AB, Zelekew OA, Lin J, Chen X. Sulfur Substitution and Defect Engineering in an Unfavored MnMoO 4 Catalyst for Efficient Hydrogen Evolution under Visible Light. ACS APPLIED MATERIALS & INTERFACES 2023; 15:22142-22156. [PMID: 37127405 DOI: 10.1021/acsami.3c02205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A novel and nonstoichiometric Mn1-xMo(S,O)4-y oxysulfide catalyst with oxygen vacancies and a partial Mo6+-to-Mo4+ transition after the substitution of sulfur was synthesized for an efficient photocatalytic hydrogen evolution reaction (PHER). With appropriate sulfur substitution, a MnMoO4 semiconductor with a wide band gap was converted to Mn1-xMo(S,O)4-y with a narrow gap and a suitable band position for PHER. MnMo oxysulfide of 50 mg achieved a high PHER rate of 415.8 μmol/h under visible light, an apparent quantum efficiency (AQE) of 4.31% at 420 nm, and a solar-to-hydrogen (STH) conversion efficiency of 1.28%. Oxygen vacancies (VO) surrounded by low coordination metal atoms act as active reaction sites, which strengthen water adsorption and activation. Here, we demonstrate that sulfur substitution of MnMoO4 for lowering its wide band gap can not only disturb the strict periodicity of the lattice but also the valence states of Mn and Mo for enhancing PHER via material design.
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Affiliation(s)
- Qinhan Wu
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Longyan Chen
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Dong-Hau Kuo
- Department of Materials Science and Engineering & Graduate Institute of Energy and Sustainability Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Ping Li
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Adugna Boke Abdeta
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Osman Ahmed Zelekew
- Department of Materials Science and Engineering, Adama Science and Technology University, Adama 1888, Ethiopia
| | - Jinguo Lin
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiaoyun Chen
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Liu Z, Zhong Y, Hu Z, Zhang W, Zhang X, Ji X, Wang X. Modification of ZIF-8 nanocomposite by a Gd atom doped TiO2 for high efficiency photocatalytic degradation of neutral red dye: An experimental and theoretical study. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/28/2023]
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5
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Wang Z, Sun Z, Chen X, Zou W, Jiang X, Sun D, Yu M. Color fastness enhancement of dyed wood by Si-sol@PDMS based superhydrophobic coating. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.129701] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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6
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Mo-/O-deficient Bi2Mo3(S,O)12 oxysulfide for enhanced visible-light photocatalytic H2 evolution and pollutant reduction via in-situ generated protons: A case of material design in converting an oxidative Bi2Mo3O12 catalyst for the reduction. J Catal 2022. [DOI: 10.1016/j.jcat.2022.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Li S, Yu R, Zhou C, Guo J. Fabrication of Hybrid Mesoporous TiO2–SiO2 Acid Catalysts for Friedel-Crafts Alkylation Reaction. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2022. [DOI: 10.1134/s0036024422070275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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de Araújo Gusmão C, Palharim PH, Ramos B, Teixeira ACSC. Enhancing the visible-light photoactivity of silica-supported TiO 2 for the photocatalytic treatment of pharmaceuticals in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:42215-42230. [PMID: 34628619 DOI: 10.1007/s11356-021-16718-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 09/21/2021] [Indexed: 06/13/2023]
Abstract
Catalyst samples based on SiO2-supported TiO2 were prepared with the incorporation of Ag (metal), S (nonmetal), and ZnO@S (semiconductor and nonmetal). The materials were evaluated regarding their morphological, optical, and crystalline properties as well as their photoactivity under visible and ultraviolet light toward the degradation rate of a model emerging pollutant, acetaminophen (ACT). All modified materials exhibited improved performance over the undoped catalyst. The Ag-doped catalyst achieved the largest degradation under visible radiation (about 30% in 120 min), whereas under ultraviolet irradiation, the ZnO@S-doped sample exhibited the best performance (about 62% in 120 min). A Doehlert design was carried out to evaluate the influence of pH and temperature on the photoactivity of Ag-TiO2/SiO2. In addition, the role of each reactive species in the photodegradation reaction was investigated by radical scavenger experiments, and the superoxide radical anion O2•- was shown to be the predominant reactive species. The stability of the Ag-TiO2/SiO2 material under ultraviolet and visible light was confirmed after five successive operation cycles, showing a reasonable (about 50%) loss of activity under visible irradiation and a slight improvement (about 13%) under UV light, as a result of the photo-reduction of Ag+. Lastly, the effect of the initial pollutant concentration showed that ACT degradation using Ag-TiO2/SiO2 follows the Langmuir-Hinshelwood kinetics, with intrinsic reaction rate k = 2.71 × 10-4 mmol L-1 min-1 under visible-light radiation.
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Affiliation(s)
- Carolina de Araújo Gusmão
- Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Luciano Gualberto, tr. 3, São Paulo, SP, 380, Brazil.
| | - Priscila Hasse Palharim
- Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Luciano Gualberto, tr. 3, São Paulo, SP, 380, Brazil
| | - Bruno Ramos
- Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Luciano Gualberto, tr. 3, São Paulo, SP, 380, Brazil
- Department of Metallurgical and Materials Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Luciano Gualberto, tr. 3, São Paulo, SP, 380, Brazil
| | - Antonio Carlos Silva Costa Teixeira
- Research Group in Advanced Oxidation Processes (AdOx), Department of Chemical Engineering, Escola Politécnica, University of São Paulo, Av. Prof. Luciano Gualberto, tr. 3, São Paulo, SP, 380, Brazil
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Liu J, Ji Y, Zhu S, Guo T, Xu L, Dong J, Cheng P. C-dot doping for enhanced catalytic performance of TiO 2/5A for toluene degradation in non-thermal plasma-catalyst system. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:2480-2492. [PMID: 34374012 DOI: 10.1007/s11356-021-15840-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Non-thermal plasma (NTP) is gaining attention as a powerful tool to induce various reactions. The combination of NTP with catalysts has been successfully used to degrade volatile organic compounds (VOCs) for pollution control. In this study, a series of TiO2-C/5A catalysts, synthesized by carbon dots (C-dots) that decorate TiO2 by sol-gel and wetness impregnation methods, were incorporated with a dielectric barrier discharge (DBD) reactor in a single-stage structure to degrade toluene at atmospheric pressure and room temperature. A proton-transfer reaction mass spectrometer and a CO2 analyzer were used to monitor the concentration variations of organic by-products and CO2 online. The effects of input power, mass ratio of C-dots/TiO2 (TiO2/5A (0 wt%), TiO2-C1/5A (2.5 wt%), TiO2-C2/5A (5 wt%), TiO2-C3/5A (10 wt%)), gas flow rate, initial concentration of toluene on the toluene degradation efficiency, and CO2 selectivity were studied. The plasma-catalyst hybrid system could effectively improve the energy efficiency and reaction selectivity, attaining a maximum toluene degradation efficiency of 99.6% and CO2 selectivity of 83.0% compared to 79.5% and 37.5%, respectively, using the conventional plasma alone. Moreover, the generation of organic by-products also declined dramatically, averaging only half as much in plasma alone. The results also indicated that the appropriate amount of C-dot doping could greatly improve the catalyst efficiency in the hybrid plasma system. This is because the interaction between C-dots and TiO2 favors the formation of photoelectron holes and reduces the energy band gap and the recombination rate of photogenerated electron holes, which facilitates the generation of more active species on the catalyst surface, thereby leading to a more effective degradation reaction. These observations will provide guidance for the interaction studies between NTP and catalysts, not only for the exploration of new chemical mechanisms of aromatic compounds, but also for the screening of favorable materials for the desired reactions.
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Affiliation(s)
- Jixing Liu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Yanyan Ji
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Shuping Zhu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Teng Guo
- Institute of Environment Safety and Pollution Control, Jinan University, Guangzhou, 510632, China
| | - Li Xu
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Junguo Dong
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China
| | - Ping Cheng
- School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China.
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10
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Kalampaliki T, Makri SP, Papadaki E, Grigoropoulos A, Zoikis Karathanasis A, Deligkiozi I. Visible-Light Active Sulfur-Doped Titania Nanoparticles Immobilized on a Silica Matrix: Synthesis, Characterization and Photocatalytic Degradation of Pollutants. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:2543. [PMID: 34684984 PMCID: PMC8537489 DOI: 10.3390/nano11102543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 09/15/2021] [Accepted: 09/21/2021] [Indexed: 02/01/2023]
Abstract
The photocatalytic oxidation (PCO) of pollutants using TiO2-based materials can significantly improve indoor air quality (IAQ), which in turn, has a significant impact on human health and life expectancy. TiO2-based nanoparticles (NPs) are widely used as part of building materials to function as photocatalysts in PCO. In this work, a series of sulfur-doped TiO2 NPs immobilized on a silica matrix were synthesized by combining a sol-gel process with ball milling. The samples were structurally characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), Fourier-transform infrared spectroscopy (FT-IR) and N2 adsorption-desorption isotherms. Furthermore, the morphological characteristics were determined by dynamic light scattering (DLS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The photocatalytic activity of the as prepared S-doped TiO2/SiO2 NPs in the degradation of liquid and air pollutants under visible-light irradiation was investigated. Our results show that sulfur is an effective dopant for activating TiO2/SiO2 photocatalysts under visible-light irradiation. Silica constitutes a "safe-by-design" approach and inhibits the aggregation of NPs during synthesis. The most efficient photocatalyst afforded 79% removal of methyl orange (5 h), 26% removal of acetaldehyde (1 h) and 12% oxidation of NO (1 h).
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Affiliation(s)
| | | | | | | | | | - Ioanna Deligkiozi
- Creative Nano PC, 4 Leventi Street, Peristeri, 12132 Athens, Greece; (T.K.); (S.P.M.); (E.P.); (A.G.); (A.Z.K.)
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11
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Impact of Doping and Additive Applications on Photocatalyst Textural Properties in Removing Organic Pollutants: A Review. Catalysts 2021. [DOI: 10.3390/catal11101160] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The effect of ion doping and the incorporation of additives on photocatalysts’ textural properties have been reviewed. Generally, it can be summarised that ion doping and additives have beneficial effects on photocatalytic efficiency and not all have an increase in the surface area. The excessive amount of dopants and additives will produce larger aggregated particles and also cover the mesoporous structures, thereby increasing the pore size (Pd) and pore volume (Pv). An excessive amount of dopants also leads to visible light shielding effects, thus influence photocatalytic performance. Ion doping also shows some increment in the surface areas, but it has been identified that synergistic effects of the surface area, porosity, and dopant amount contribute to the photocatalytic performance. It is therefore important to understand the effect of doping and the application of additives on the textural properties of photocatalysts, thus, their performance. This review will provide an insight into the development of photocatalyst with better performance for wastewater treatment applications.
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12
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Sun H, Guo Y, Zelekew OA, Abdeta AB, Kuo DH, Wu Q, Zhang J, Yuan Z, Lin J, Chen X. Biological renewable nanocellulose templated CeO2/TiO2 synthesis and its photocatalytic removal efficiency of pollutants. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116873] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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13
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Activated carbon supported CuSnOS catalyst with an efficient catalytic reduction of pollutants under dark condition. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116079] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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14
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Di Y, Ma C, Fu Y, Dong X, Liu X, Ma H. Engineering Cationic Sulfur-Doped Co 3O 4 Architectures with Exposing High-Reactive (112) Facets for Photoelectrocatalytic Water Purification. ACS APPLIED MATERIALS & INTERFACES 2021; 13:8405-8416. [PMID: 33566566 DOI: 10.1021/acsami.0c20353] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Promoting the generation of intermediate active species (superoxide radical (•O2-)) is an important and challenging task for water purification by photoelectrocatalytic (PEC) oxidation. Herein, we have constructed hierarchical cationic sulfur-doped Co3O4 architectures with controllable morphology and highly exposed reactive facets by introducing l-cysteine as a capping reagent and sulfur resource via a one-step hydrothermal reaction. The as-obtained cationic sulfur (1.8 mmol l-cysteine) source doped Co3O4 (SC-1.8) architectures with highly exposed (112) facets exhibited superior PEC activities and long-term stability (∼25,000 s) in 1.0 mol·L-1 sulfuric acid for an accelerated reactive brilliant blue KN-R degradation test. Our experimental and theoretical results confirmed that the superior PEC performance of the SC-1.8 architectures could be ascribed the following factors: (1) the highly exposed reactive (112) facets of SC-1.8 promoted carrier transport and diffusion during the PEC process and facilitated separating the electron/hole pairs and producing the predominant active species (•O2-) compared with currently used other electrodes. (2) Cationic sulfur doped on the lattice of Co3O4 can narrow the band gap to extend the photoadsorption range and improve the lifetime of •O2- to enhance the PEC efficiency. This work not only proves that the SC-1.8 architectures with highly exposed (112) facets are a promising PEC catalyst due to increasing the electron transport and the lifetime of active species but also presents a new strategy for constructing an active PEC catalyst.
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Affiliation(s)
- Yanwei Di
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Ganjingzi District, Dalian 116034, P.R. China
| | - Chun Ma
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Ganjingzi District, Dalian 116034, P.R. China
| | - Yinghuan Fu
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Ganjingzi District, Dalian 116034, P.R. China
| | - Xiaoli Dong
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Ganjingzi District, Dalian 116034, P.R. China
| | - Xinghui Liu
- Department of Chemistry, Sungkyunkwan University (SKKU), 2066 Seoburo, Jangan-Gu, Suwon 16419, Republic of Korea
| | - Hongchao Ma
- School of Light Industry and Chemical Engineering, Dalian Polytechnic University, Ganjingzi District, Dalian 116034, P.R. China
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Abstract
This article presents an overview of the reports on the doping of TiO2 with carbon, nitrogen, and sulfur, including single, co-, and tri-doping. A comparison of the properties of the photocatalysts synthesized from various precursors of TiO2 and C, N, or S dopants is summarized. Selected methods of synthesis of the non-metal doped TiO2 are also described. Furthermore, the influence of the preparation conditions on the doping mode (interstitial or substitutional) with reference to various types of the modified TiO2 is summarized. The mechanisms of photocatalysis for the different modes of the non-metal doping are also discussed. Moreover, selected applications of the non-metal doped TiO2 photocatalysts are shown, including the removal of organic compounds from water/wastewater, air purification, production of hydrogen, lithium storage, inactivation of bacteria, or carbon dioxide reduction.
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Sun H, Abdeta AB, Zelekew OA, Guo Y, Zhang J, Kuo DH, Lin J, Chen X. Spherical porous SiO2 supported CuVOS catalyst with an efficient catalytic reduction of pollutants under dark condition. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113567] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Iqbal F, Mumtaz A, Shahabuddin S, Abd Mutalib MI, Shaharun MS, Nguyen TD, Khan MR, Abdullah B. Photocatalytic reduction of
CO
2
to methanol over
ZnFe
2
O
4
/
TiO
2
(p–n) heterojunctions under visible light irradiation. JOURNAL OF CHEMICAL TECHNOLOGY & BIOTECHNOLOGY 2020; 95:2208-2221. [DOI: 10.1002/jctb.6408] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Affiliation(s)
- Farukh Iqbal
- Department of Chemical and Environmental Engineering, School of EngineeringRMIT University Melbourne Australia
- Chemical Engineering DepartmentUniversiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
| | - Asad Mumtaz
- Department of Fundamental and Applied SciencesUniversiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
- School of Natural Sciences (SNS)National University of Sciences and Technology (NUST) Islamabad Pakistan
| | - Syed Shahabuddin
- Department of Science, School of TechnologyPandit Deendayal Petroleum University Gandhinagar India
| | | | - Maizatul Shima Shaharun
- Department of Fundamental and Applied SciencesUniversiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
| | - Trinh Duy Nguyen
- Center of Excellence for Green Energy Environmental Nanomaterials (CE@GrEEN)Nguyen Tat Thanh University Ho Chi Minh City Vietnam
| | - Maksudur Rahman Khan
- Department of Natural Resource and Chemical EngineeringUniversiti Malaysia Pahang Pekan Malaysia
| | - Bawadi Abdullah
- Chemical Engineering DepartmentUniversiti Teknologi PETRONAS Bandar Seri Iskandar Malaysia
- Chemical Engineering DepartmentCenter of Contaminant Control and Utilization (CenCoU), Institute Contaminant Management for Oil and Gas Bandar Seri Iskandar Malaysia
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18
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Zhao Z, Omer AA, Qin Z, Osman S, Xia L, Singh RP. Cu/N-codoped TiO 2 prepared by the sol-gel method for phenanthrene removal under visible light irradiation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:17530-17540. [PMID: 31317433 DOI: 10.1007/s11356-019-05787-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 06/18/2019] [Indexed: 06/10/2023]
Abstract
Cu/N-codoped TiO2 nanoparticles were prepared by the modified sol-gel method, to study its efficiency for the removing of polyaromatic hydrocarbon (phenanthrene) from an aqueous solution. Urea and copper sulfate pentahydrate were used as sources of doping element for Cu/N-codoped TiO2, respectively. The characterizations of the nanoparticles were done by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra. XRD revealed that all the nanoparticles were indexed to the anatase phase structure, with crystallite size range from 11 to 30 nm, which decreased with the doping of copper and nitrogen. The photocatalytic activities of Cu/N-codoped TiO2 showed the highest activities than other TiO2 nanoparticles (TiO2 and N-doped TiO2). The photodegradation efficiency of Cu/N-codoped TiO2 on phenanthrene under visible light irradiation was slightly higher (96%) comparing to UV light irradiation (94%). Cu/N-codoped TiO2 was found to be very efficient and economical for phenanthrene removal, because the smallest amount of Cu/N-codoped TiO2 exhibited the best removal efficiency on phenanthrene.
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Affiliation(s)
- Zhenhua Zhao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Abduelrahman Adam Omer
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China.
- Department of Civil Engineering, College of Engineering Science, Nyala University, Nyala, Sudan.
| | - Zhirui Qin
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, People's Republic of China
| | - Salaheldein Osman
- Department of Civil Engineering, College of Engineering Science, Nyala University, Nyala, Sudan
- Water Harvesting center, Nyala University, Nyala, Sudan
| | - Liling Xia
- Nanjing Institute of Industry Technology, People's Republic of, Nanjing, 210016, China
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Zhou K, Ding Y, Zhang L, Wu H, Guo J. Synthesis of mesoporous ZnO/TiO 2-SiO 2 composite material and its application in photocatalytic adsorption desulfurization without the addition of an extra oxidant. Dalton Trans 2020; 49:1600-1612. [PMID: 31942580 DOI: 10.1039/c9dt04454j] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Photocatalytic adsorption desulfurization (PADS) technology has attracted enormous attention in the deep desulfurization field. Therefore, a good material with high photocatalytic activity and adsorption capacity toward organic sulfide is desirable. Herein, mesoporous ZnO/TiO2-SiO2 (ZTS) was synthesized for the first time and successfully applied in the photocatalytic desulfurization of dibenzothiophene (DBT). The composite materials were characterized by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), N2-physisorption, transmission electron microscopy (TEM), UV-Vis diffusive reflectance spectra (UV-Vis DRS), X-ray photo-electron spectroscopy (XPS), photoluminescence (PL) and electron spin resonance (ESR). The results show that the doping of TiO2 promotes the photocatalytic and adsorption abilities of the catalysts dramatically. ZTS-3 with Si/Ti = 3 exhibits the best photocatalytic desulfurization activity compared with other proportions of titanium doping. The final DBT conversion can reach 97%, and the maximum adsorption of DBT over ZTS-3 is 47 mg-S per g-cat. The photocatalytic test indicates that the remarkable photocatalytic activity of ZTS is due to the formation of a heterojunction by the interaction of ZnO and TiO2, which can successfully expand solar light absorption, improving the charge separation efficiency and inhibiting the recombination of photocatalytic electron-hole pairs. Moreover, no extra oxidants (such as O2, H2O2 or an organic oxidant) were added, which is highly beneficial for the consequent treatment of the fuel and can reduce the processing cost markedly.
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Affiliation(s)
- Kangdi Zhou
- Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology, Wuhan Institute of Technology, Wuhan 430073, P. R. China.
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Huang P, Luan J. Preparation and characterization of an Ag 3PO 4/GaOOH composite with enhanced photocatalytic performance toward rhodamine B. NEW J CHEM 2020. [DOI: 10.1039/c9nj05987c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient Ag3PO4/GaOOH composite was innovatively prepared and its photocatalytic performance was evaluated through degrading rhodamine B (RhB) under illumination, in this paper.
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Affiliation(s)
- Panqi Huang
- State Key Laboratory of Pollution Control and Resource Reuse
- School of the Environment
- Nanjing University
- Nanjing
- China
| | - Jingfei Luan
- School of Physics
- Changchun Normal University
- Changchun
- China
- State Key Laboratory of Pollution Control and Resource Reuse
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Manganese disulfide-silicon dioxide nano-material: Synthesis, characterization, photocatalytic, antioxidant and antimicrobial studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 198:111579. [DOI: 10.1016/j.jphotobiol.2019.111579] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/21/2019] [Accepted: 07/24/2019] [Indexed: 11/18/2022]
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Preparation, and structural of new NiS-SiO2 and Cr2S3-TiO2 nano-catalyst: Photocatalytic and antimicrobial studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 194:128-134. [DOI: 10.1016/j.jphotobiol.2019.03.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 03/18/2019] [Accepted: 03/25/2019] [Indexed: 11/22/2022]
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Differences in the Catalytic Behavior of Au-Metalized TiO2 Systems During Phenol Photo-Degradation and CO Oxidation. Catalysts 2019. [DOI: 10.3390/catal9040331] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
For this present work, a series of Au-metallized TiO2 catalysts were synthesized and characterized in order to compare their performance in two different catalytic environments: the phenol degradation that occurs during the liquid phase and in the CO oxidation phase, which proceeds the gas phase. The obtained materials were analyzed by different techniques such as XRF, SBET, XRD, TEM, XPS, and UV-Vis DRS. Although the metallization was not totally efficient in all cases, the amount of noble metal loaded depended strongly on the deposition time. Furthermore, the differences in the amount of loaded gold were important factors influencing the physicochemical properties of the catalysts, and consequently, their performances in the studied reactors. The addition of gold represented a considerable increase in the phenol conversion when compared with that of the TiO2, despite the small amount of noble metal loaded. However, this was not the case in the CO oxidation reaction. Beyond the differences in the phase where the reaction occurred, the loss of catalytic activity during the CO oxidation reaction was directly related to the sintering of the gold nanoparticles.
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Enhanced photocatalytic activity of a mesoporous TiO2 aerogel decorated onto three-dimensional carbon foam. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.080] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Sun H, Zelekew OA, Chen X, Guo Y, Kuo DH, Lu Q, Lin J. A noble bimetal oxysulfide CuVOS catalyst for highly efficient catalytic reduction of 4-nitrophenol and organic dyes. RSC Adv 2019; 9:31828-31839. [PMID: 35530754 PMCID: PMC9072956 DOI: 10.1039/c9ra05172d] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 09/17/2019] [Indexed: 11/21/2022] Open
Abstract
A novel CuVOS catalyst was successfully synthesized by a facile method. The CuVOS with optimum amount of N2H4 had higher catalytic activity.
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Affiliation(s)
- Huizhi Sun
- College of Materials Engineering
- Fujian Agriculture & Forestry University
- Fuzhou 350002
- China
| | - Osman Ahmed Zelekew
- Department of Materials Science and Engineering
- Adama Science and Technology University
- Adama
- Ethiopia
| | - Xiaoyun Chen
- College of Materials Engineering
- Fujian Agriculture & Forestry University
- Fuzhou 350002
- China
| | - Yuanbo Guo
- College of Materials Engineering
- Fujian Agriculture & Forestry University
- Fuzhou 350002
- China
| | - Dong-Hau Kuo
- Department of Materials Science and Engineering
- National Taiwan University of Science and Technology
- Taipei 10607
- Taiwan
| | - Qingxin Lu
- College of Materials Engineering
- Fujian Agriculture & Forestry University
- Fuzhou 350002
- China
| | - Jinguo Lin
- College of Materials Engineering
- Fujian Agriculture & Forestry University
- Fuzhou 350002
- China
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