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Wang H, Yan C, Xu M, Li J, Zhang Z, Song X, Liu X, Huo P. Pd Nanoparticle-Modified BiOBr/CdS S-Scheme Photocatalyst for Enhanced Conversion of CO 2. Inorg Chem 2024. [PMID: 39213634 DOI: 10.1021/acs.inorgchem.4c03112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
S-scheme heterojunction photocatalyst-coupled plasma-resonance effect can enhance the response range and absorption of light and charge transfer, and, at the same time, obtain strong redox ability, which is an effective way to improve CO2 conversion. In this work, plasma S-scheme heterojunctions of Pd/BiOBr/CdS with heterogeneous interfaces have been successfully constructed by a simple hydrothermal method. The possible reaction mechanism was proposed by in situ infrared, ultraviolet-visible spectroscopy (UV-vis), electron paramagnetic resonance (ESR), density functional theory (DFT), and electrochemical techniques. It was proved that the plasma S-scheme heterojunction can enhance the charge separation efficiency and improve the photocatalytic activity. When the loading ratio is Pd0.6-10%-BiOBr/CdS, it has the best performance, and the CO yield is 30.24 μmol/g, which is 15 and 30 times that of pure BiOBr and CdS, respectively. The results show that with the strong absorption of photon energy and the special electron transfer mode of S-scheme heterojunction, the charge can be effectively separated and transferred, and the photocatalytic activity is significantly improved. This study provides a useful strategy for charge transfer kinetics of plasma S-scheme heterojunction photocatalysts.
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Affiliation(s)
- Huiqin Wang
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Chenlong Yan
- School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Mengyang Xu
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Jinze Li
- China Construction Eco-environmental Protection Technology CO., LTD., Suzhou 215124, PR China
| | - Ziyang Zhang
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xianghai Song
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Xin Liu
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Pengwei Huo
- Institute of Green Chemistry and Chemical Technology, School of Chemistry & Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China
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2
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Yuan Z, Zhu X, Gao X, An C, Wang Z, Zuo C, Dionysiou DD, He H, Jiang Z. Enhancing photocatalytic CO 2 reduction with TiO 2-based materials: Strategies, mechanisms, challenges, and perspectives. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2024; 20:100368. [PMID: 38268554 PMCID: PMC10805649 DOI: 10.1016/j.ese.2023.100368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 12/10/2023] [Accepted: 12/10/2023] [Indexed: 01/26/2024]
Abstract
The concentration of atmospheric CO2 has exceeded 400 ppm, surpassing its natural variability and raising concerns about uncontrollable shifts in the carbon cycle, leading to significant climate and environmental impacts. A promising method to balance carbon levels and mitigate atmospheric CO2 rise is through photocatalytic CO2 reduction. Titanium dioxide (TiO2), renowned for its affordability, stability, availability, and eco-friendliness, stands out as an exemplary catalyst in photocatalytic CO2 reduction. Various strategies have been proposed to modify TiO2 for photocatalytic CO2 reduction and improve catalytic activity and product selectivity. However, few studies have systematically summarized these strategies and analyzed their advantages, disadvantages, and current progress. Here, we comprehensively review recent advancements in TiO2 engineering, focusing on crystal engineering, interface design, and reactive site construction to enhance photocatalytic efficiency and product selectivity. We discuss how modifications in TiO2's optical characteristics, carrier migration, and active site design have led to varied and selective CO2 reduction products. These enhancements are thoroughly analyzed through experimental data and theoretical calculations. Additionally, we identify current challenges and suggest future research directions, emphasizing the role of TiO2-based materials in understanding photocatalytic CO2 reduction mechanisms and in designing effective catalysts. This review is expected to contribute to the global pursuit of carbon neutrality by providing foundational insights into the mechanisms of photocatalytic CO2 reduction with TiO2-based materials and guiding the development of efficient photocatalysts.
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Affiliation(s)
- Zhimin Yuan
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, PR China
| | - Xianglin Zhu
- Institute for Energy Research, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, PR China
| | - Xianqiang Gao
- College of Forestry, Shandong Agricultural University, Taian, 271018, PR China
| | - Changhua An
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, 300384, PR China
| | - Zheng Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Cheng Zuo
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, PR China
| | - Dionysios D. Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering (DChEE), University of Cincinnati, Cincinnati, OH, 45221-0012, USA
| | - Hong He
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
| | - Zaiyong Jiang
- School of Chemistry & Chemical Engineering and Environmental Engineering, Weifang University, Weifang, 261061, PR China
- State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China
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3
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Wang Y, Xu Y, Cai X, Wu J. Adsorption and Visible Photocatalytic Synergistic Removal of a Cationic Dye with the Composite Material BiVO 4/MgAl-LDHs. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6879. [PMID: 37959476 PMCID: PMC10650294 DOI: 10.3390/ma16216879] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 10/17/2023] [Accepted: 10/20/2023] [Indexed: 11/15/2023]
Abstract
Adsorption and photocatalysis are effective in removing organic pollutants from wastewater. This study is based on the memory effects of MgAl-layered double hydroxides (MgAl-LDHs) after high-temperature calcination. By introducing bismuth vanadate (BiVO4) during the reformation of the layered structure via contact with water, a composite material BiVO4/MgAl-LDHs with enhanced adsorption and visible light catalytic performance was synthesized. The effects of the calcination temperature, ratio, initial methylene blue (MB) concentration, and catalyst dosage on the adsorption and photocatalytic performance were investigated. The BiVO4/MgAl-LDHs showed better photocatalytic performance than the pure BiVO4 and MgAl-LDHs. Under the optimal conditions, the proportion of MB adsorbed in 20 min was 66.1%, and the percentage of MB degraded during 100 min of photolysis was 92.4%. The composite photocatalyst showed good chemical stability and cyclability, and the adsorption-degradation rate was 86% after four cycles. Analyses of the adsorption and photocatalytic mechanisms for the composite material showed that synergistic adsorption and visible light photocatalysis contributed to the excellent catalytic performance of the BiVO4/MgAl-LDHs. A highly adsorbent photocatalytic composite material exhibiting outstanding performance was prepared via a simple, cost-effective, and environmentally friendly method, providing reference information for the removal of organic pollutants from liquids.
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Affiliation(s)
- Yuquan Wang
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
- College of Civil Engineering and Architecture, NingboTech University, Ningbo 315100, China
| | - Yidong Xu
- College of Civil Engineering and Architecture, NingboTech University, Ningbo 315100, China
| | - Xinjie Cai
- College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
- College of Civil Engineering and Architecture, NingboTech University, Ningbo 315100, China
| | - Jinting Wu
- College of Civil Engineering and Architecture, NingboTech University, Ningbo 315100, China
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4
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A novel BN/TiO2/HNT nanocomposite for photocatalytic applications fabricated by electrospinning. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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5
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Liu F, Cao H, Xu L, Fu H, Sun S, Xiao Z, Sun C, Long X, Xia Y, Wang S. Design and preparation of highly active TiO 2 photocatalysts by modulating their band structure. J Colloid Interface Sci 2023; 629:336-344. [PMID: 36162391 DOI: 10.1016/j.jcis.2022.09.025] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 08/24/2022] [Accepted: 09/04/2022] [Indexed: 10/14/2022]
Abstract
Titanium dioxide photocatalysts with high reduction potential and visible light response hold great promise in photochemical conversion. Here, we used a simple glycine doping method to synthesize novel N-TiO2@C photocatalysts with upward shifted conduction bands and narrowed band gaps as well as inhibited recombination of photoinduced electron-hole pairs. The N-TiO2@C photocatalysts exhibited higher visible light response and remarkably enhanced photocatalytic activity in the production of nicotinamide adenine dinucleotide (NADH) by photomediated reduction of NAD+ without any electron mediator. The yield of NADH was up to 70.3 % far greater than that of the undoped TiO2 (11.3 %), and it stabilized at ca. 60 % after 10 cycles. The viability of coupling NADH regeneration with enzymatic reaction (alcohol dehydrogenase) was established in aldehyde reduction where formaldehyde was specifically reduced to methanol. These findings shed new light on the modulation of the band structure of semiconductors and develop an electron mediator free strategy for NADH-dependent artificial photosynthesis through coupled photocatalytic and enzymatic approaches.
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Affiliation(s)
- Fangyuan Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Han Cao
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Luyi Xu
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Hui Fu
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Shiyong Sun
- School of Environment and Resource, Southwest University of Science and Technology, Mianyang 621010, China
| | - Zijun Xiao
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Caiheng Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Xing Long
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Yongqing Xia
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China
| | - Shengjie Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao 266580, China.
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6
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BiOBr/Bi2S3 heterojunction with S-scheme structureand oxygen defects: In-situ construction and photocatalytic behavior for reduction of CO2 with H2O. J Colloid Interface Sci 2022; 620:407-418. [DOI: 10.1016/j.jcis.2022.04.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 04/05/2022] [Accepted: 04/06/2022] [Indexed: 01/22/2023]
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7
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Sheng W, Huang F, Dong X, Lang X. Solvent-controlled synthesis of Ti-based porphyrinic metal–organic frameworks for the selective photocatalytic oxidation of amines. J Colloid Interface Sci 2022; 628:784-793. [PMID: 35963166 DOI: 10.1016/j.jcis.2022.07.185] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/27/2022] [Accepted: 07/29/2022] [Indexed: 10/16/2022]
Abstract
The photocatalytic activity of metal-organic frameworks (MOFs) can be managed by the milieu of synthesis. Herein, N,N'-dimethylacetamide (DMA) and N,N'-diethylformamide (DEF) were employed as solvents for the synthesis of two Ti-based porphyrinic MOFs, namely Ti-PMOF-DMA and Ti-PMOF-DEF, from tetrabutyl orthotitanate and 4,4',4'',4'''-(porphine-5,10,15,20-tetrayl)tetrakis(benzoic acid). Notably, both DMA and DEF were adsorbed onto the Ti-oxo clusters of the two MOFs to shape their properties. Ti-PMOF-DMA was observed with better optoelectronic response and charge transfer than Ti-PMOF-DEF. Moreover, Ti-PMOF-DMA owned a larger pore volume than Ti-PMOF-DEF, imparting more accessible sites to benzyl amines. Ti-PMOF-DMA exhibited better activity in selective photocatalytic aerobic oxidation of benzylamine than Ti-PMOF-DEF. Irradiated by red light-emitting diodes, outstanding results for selective conversion of benzyl amines to imines over Ti-PMOF-DMA were attained. Superoxide radical anion, generated by the electron transfer from porphyrin via Ti-oxo clusters to dioxygen, turned out to be the primary reactive oxygen species. There was generality towards aerobic oxidation of amines to imines and considerable stability for Ti-PMOF-DMA. This work provides a new perspective on the altering MOFs to enhance photocatalytic organic transformations.
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8
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Photocatalytic Reduction of CO 2 with N-Doped TiO 2-Based Photocatalysts Obtained in One-Pot Supercritical Synthesis. NANOMATERIALS 2022; 12:nano12111793. [PMID: 35683653 PMCID: PMC9182572 DOI: 10.3390/nano12111793] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/20/2022] [Accepted: 05/22/2022] [Indexed: 01/28/2023]
Abstract
The objective of this work was to analyze the effect of carbon support on the activity and selectivity of N-doped TiO2 nanoparticles. Thus, N-doped TiO2 and two types of composites, N-doped TiO2/CNT and N-doped TiO2/rGO, were prepared by a new environmentally friendly one-pot method. CNT and rGO were used as supports, triethylamine and urea as N doping agents, and titanium (IV) tetraisopropoxide and ethanol as Ti precursor and hydrolysis agent, respectively. The as-prepared photocatalysts exhibited enhanced photocatalytic performance compared to TiO2 P25 commercial catalyst during the photoreduction of CO2 with water vapor. It was imputed to the synergistic effect of N doping (reduction of semiconductor band gap energy) and carbon support (enlarging e−-h+ recombination time). The activity and selectivity of catalysts varied depending on the investigated material. Thus, whereas N-doped TiO2 nanoparticles led to a gaseous mixture, where CH4 formed the majority compared to CO, N-doped TiO2/CNT and N-doped TiO2/rGO composites almost exclusively generated CO. Regarding the activity of the catalysts, the highest production rates of CO (8 µmol/gTiO2/h) and CH4 (4 µmol/gTiO2/h) were achieved with composite N1/TiO2/rGO and N1/TiO2 nanoparticles, respectively, where superscript represents the ratio mg N/g TiO2. These rates are four times and almost forty times higher than the CO and CH4 production rates observed with commercial TiO2 P25.
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9
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Bin Arifin MN, Tarek M, Rahman Khan MM. Efficient Treatment of Organic Pollutants by Boron Doped TiO2 Photocatalysts under Visible Light Radiation. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Layered and poriferous (Al,C)-Ta2O5 mesocrystals supported CdS quantum dots for high-efficiency photodegradation of organic contaminants. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120297] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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11
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Li X, Ma X, Lang X. Blue light-powered hydroxynaphthoic acid-titanium dioxide photocatalysis for the selective aerobic oxidation of amines. J Colloid Interface Sci 2021; 602:534-543. [PMID: 34144307 DOI: 10.1016/j.jcis.2021.06.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Revised: 05/14/2021] [Accepted: 06/02/2021] [Indexed: 01/26/2023]
Abstract
Solar photocatalysis is the key to resolve many environmental challenges but is usually hard to achieve over a metal oxide semiconductor. Therefore, assembling π-conjugated molecules onto semiconductors becomes an efficient approach to solar conversion via ligand-to-metal charge transfer. Here, a rational design of ligands for titanium dioxide (TiO2) is presented to produce robust visible light photocatalysts. Three hydroxynaphthoic acids (HNAs) were selected as ligands by extending an extra benzene ring of salicylic acid (SA) at 3,4 or 4,5 or 5,6 positions. These ligands could regulate the performance of TiO2 in which 2-hydroxy-1-naphthoic acid (2H1NA) endows the best outcome. In detail, blue light-powered cooperative photocatalysis of 2H1NA-TiO2 with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO, 5 mol%) inaugurates the expeditious formation of imines by oxidation of amines with atmospheric oxygen (O2). Interestingly, the increase of the O2 pressure from 1 atm to 0.4 MPa promoted the selective oxidation of benzylamine but thereafter declined with a further boost to 0.6 MPa. Notably, an electron transfer between the oxidatively quenched 2H1NA-TiO2 and TEMPO is established, offering a new pathway for environmental applications. This work presents a strategy in designing cutting-edge visible light photocatalysts via altering semiconductors with surface ligands.
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Affiliation(s)
- Xia Li
- Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xiaoming Ma
- Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Xianjun Lang
- Sauvage Center for Molecular Sciences, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China.
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12
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Jandam N, Serivalsatit K, Hunsom M, Pruksathorn K. Ultrasound-Assisted Synthesis of Nonmetal-Doped Titanium Dioxide Photocatalysts for Simultaneous H 2 Production and Chemical Oxygen Demand Removal from Industrial Wastewater. ACS OMEGA 2021; 6:24709-24719. [PMID: 34604653 PMCID: PMC8482470 DOI: 10.1021/acsomega.1c03483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Indexed: 06/02/2023]
Abstract
A series of nonmetal-doped titanium dioxide (Nm x /TiO2, where x is the weight fraction of nonmetal elements) photocatalysts was prepared via ultrasonic-assisted impregnation for simultaneous hydrogen (H2) production and chemical oxygen demand (COD) removal from industrial wastewater. Three types of Nm elements, carbon (C), silicon (Si), and phosphorus (P), were explored. The P1/TiO2 exhibited a higher photocatalytic activity for H2 production and COD removal than the C1/TiO2 and Si1/TiO2 photocatalysts. Approximately 6.43 mmol/g photocatalyst of H2 was produced, and around 26% COD removal was achieved at a P1/TiO2 loading of 4.0 g/L, a light intensity of 5.93 mW/cm2, and a radiation time of 4 h. This is because the P1/TiO2 photocatalyst exhibited lower point of zero charge values and a more appropriate band position compared with other Nm x /TiO2 photocatalysts to produce H+, which can consequently form H2, and reactive oxygen species (HO· and O2 · -), which serve as oxidizing agents to degrade the organic pollutants. Increasing the content of the P element doped into the TiO2-based material up to 7.0% by weight enhanced the H2 production and COD removal up to 8.34 mmol/g photocatalyst and 50.6%, respectively. This is attributed to the combined effect of the point of zero charge value and the S BET of the prepared photocatalysts. The photocatalytic activity of the P7/TiO2 photocatalyst was still higher than the TiO2-based material after the fourth use.
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Affiliation(s)
- Natjakorn Jandam
- Fuels
Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Karn Serivalsatit
- Department
of Materials Science, Faculty of Science, Chulalongkorn University,Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Mali Hunsom
- Department
of Chemical Engineering, Faculty of Engineering, Mahidol University, Phuttamonthon 4 Road, Nakhon Pathom 73170, Thailand
- Associate
Fellow of Royal Society of Thailand (AFRST), Bangkok 10300, Thailand
| | - Kejvalee Pruksathorn
- Fuels
Research Center, Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Phayathai Road, Pathumwan, Bangkok 10330, Thailand
- Center
of Excellence on Petrochemical and Material Technology, Chulalongkorn University, Bangkok 10330, Thailand
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Chen C, Tian M, Han H, Wu D, Chen Y, Gao Z, Gao S, Jiang K. N, P-dual doped carbonaceous catalysts derived from bifunctional-salt activation for effective electro-Fenton degradation on waterborne organic pollutions. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138732] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Zhao J, Miao Z, Zhang Y, Wen G, Liu L, Wang X, Cao X, Wang B. Oxygen vacancy-rich hierarchical BiOBr hollow microspheres with dramatic CO 2 photoreduction activity. J Colloid Interface Sci 2021; 593:231-243. [PMID: 33744533 DOI: 10.1016/j.jcis.2021.02.117] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 02/24/2021] [Accepted: 02/25/2021] [Indexed: 11/26/2022]
Abstract
Conversion of carbon dioxide into useful chemicals has attracted great attention. However, the significant bottlenecks facing in the field are the poor conversion efficiency of CO2 and low selectivity of products. Herein, hierarchical BiOBr hollow microspheres are fabricated by a solvothermal method using ethylene glycol (EG) as solvent in presence of polyvinyl pyrrolidone (PVP). The hollow BiOBr microspheres prepared at 120 °C exhibit the best performance for CO2 photoreduction. The evolution rates of product CO and CH4 are up to 88.1 µmol g-1h-1 and 5.8 µmol g-1h-1, which are 8.8 times and 5.8 times higher than that of plate-like BiOBr respectively. The hollow microspheres possess larger specific area and generate multiple reflections of light in the cavity, thus enhancing the utilization efficiency of light. The modulated electronic structure by oxygen vacancy (OVs) is beneficial to the transfer of photogenerated electrons and holes. Especially, the enriched charge density of BiOBr by OVs is conductive to the adsorption and activation of CO2, which could lower the overall activation energy barrier of CO2 photoreduction. In summary, the synergistic effect of the hollow structure with OVs plays a vital role in boosting the photoreduction of CO2 for BiOBr. This work provides a new opportunity for designing the high efficiency catalyst by morphology engineering with defects at the atomic level for CO2 photoreduction.
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Affiliation(s)
- Jinlin Zhao
- National Experimental Chemistry Teaching Center, Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, PR China
| | - Zerui Miao
- National Experimental Chemistry Teaching Center, Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, PR China
| | - Yanfeng Zhang
- National Experimental Chemistry Teaching Center, Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang 050024, PR China.
| | - Guangyu Wen
- College of Physics, Hebei Normal University, Shijiazhuang 050024, PR China
| | - Lihu Liu
- College of Physics, Hebei Normal University, Shijiazhuang 050024, PR China.
| | - Xuxu Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, Research Institute of Photocatalysis, College of Chemistry, Fuzhou University, Fuzhou 350108, PR China.
| | - Xingzhong Cao
- Multi-discipline Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China.
| | - Baoyi Wang
- Multi-discipline Research Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, PR China
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