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Sang T, Zhong Y, Jiang S, Xue XG, Hu CH, Wang DH, Ye JC, Wei NN, Liu H. EDTA promoted Cr(VI) reduction in semiconductor/insulator photocatalyst: Performance, mechanistic insight and DFT calculation. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
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2
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Chen X, Chu B, Gu Q, Li W, Lin R, Chu J, Peng Z, Lu J, Wu D. Inhibition of Fusarium graminearum growth and deoxynivalenol accumulation in barley malt by protonated g-C3N4/oxygen-doped g-C3N4 homojunction. Food Res Int 2022; 162:112025. [DOI: 10.1016/j.foodres.2022.112025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 09/29/2022] [Accepted: 10/02/2022] [Indexed: 11/27/2022]
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3
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Wang WY, Sang T, Zhong Y, Hu CH, Wang DH, Ye JC, Wei NN, Liu H. Surfactant-Modified CdS/CdCO 3 Composite Photocatalyst Morphology Enhances Visible-Light-Driven Cr(VI) Reduction Performance. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3923. [PMID: 36364699 PMCID: PMC9657923 DOI: 10.3390/nano12213923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/04/2022] [Accepted: 11/05/2022] [Indexed: 06/16/2023]
Abstract
The surfactant modification of catalyst morphology is considered as an effective method to improve photocatalytic performance. In this work, the visible-light-driven composite photocatalyst was obtained by growing CdS nanoparticles in the cubic crystal structure of CdCO3, which, after surfactant modification, led to the formation of CdCO3 elliptical spheres. This reasonable composite-structure-modification design effectively increased the specific surface area, fully exposing the catalytic-activity check point. Cd2+ from CdCO3 can enter the CdS crystal structure to generate lattice distortion and form hole traps, which productively promoted the separation and transfer of CdS photogenerated electron-hole pairs. The prepared 5-CdS/CdCO3@SDS exhibited excellent Cr(VI) photocatalytic activity with a reduction efficiency of 86.9% within 30 min, and the reduction rate was 0.0675 min-1, which was 15.57 and 14.46 times that of CdS and CdCO3, respectively. Finally, the main active substances during the reduction process, the photogenerated charge transfer pathways related to heterojunctions and the catalytic mechanism were proposed and analyzed.
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Affiliation(s)
- Wen-Yi Wang
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Tian Sang
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Yan Zhong
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
- Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China
| | - Chao-Hao Hu
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Calcium Carbonate Resources Comprehensive Utilization, Hezhou University, Hezhou 542899, China
- Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China
| | - Dian-Hui Wang
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
- Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China
| | - Jun-Chen Ye
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Ni-Ni Wei
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
| | - Hao Liu
- School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
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Kobkeatthawin T, Chaveanghong S, Trakulmututa J, Amornsakchai T, Kajitvichyanukul P, Smith SM. Photocatalytic Activity of TiO 2/g-C 3N 4 Nanocomposites for Removal of Monochlorophenols from Water. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:2852. [PMID: 36014720 PMCID: PMC9414261 DOI: 10.3390/nano12162852] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 06/15/2023]
Abstract
This research employed g-C3N4 nanosheets in the hydrothermal synthesis of TiO2/g-C3N4 hybrid photocatalysts. The TiO2/g-C3N4 heterojunctions, well-dispersed TiO2 nanoparticles on the g-C3N4 nanosheets, are effective photocatalysts for the degradation of monochlorophenols (MCPs: 2-CP, 3-CP, and 4-CP) which are prominent water contaminants. The removal efficiency of 2-CP and 4-CP reached 87% and 64%, respectively, after treatment of 25 ppm CP solutions with the photocatalyst (40TiO2/g-C3N4, 1 g/L) and irradiation with UV-Vis light. Treatment of CP solutions with g-C3N4 nanosheets or TiO2 alone in conjunction with irradiation gave removal efficiencies lower than 50%, which suggests the two act synergically to enhance the photocatalytic activity of the 40TiO2/g-C3N4 nanocomposite. Superoxide and hydroxyl radicals are key active species produced during CP photodegradation. In addition, the observed nitrogen and Ti3+ defects and oxygen vacancies in the TiO2/g-C3N4 nanocomposites may improve the light-harvesting ability of the composite and assist preventing rapid electron-hole recombination on the surface, enhancing the photocatalytic performance. In addition, interfacial interactions between the MCPs (low polarity) and thermally exfoliated carbon nitride in the TiO2/g-C3N4 nanocomposites may also enhance MCP degradation.
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Affiliation(s)
- Thawanrat Kobkeatthawin
- Center of Sustainable Energy and Green Materials and Department of Chemistry, Faculty of Science, Mahidol University, 999 Phuttamonthon Sai 4 Road, Salaya, Nakhon Pathom 73170, Thailand
| | - Suwilai Chaveanghong
- Center of Sustainable Energy and Green Materials and Department of Chemistry, Faculty of Science, Mahidol University, 999 Phuttamonthon Sai 4 Road, Salaya, Nakhon Pathom 73170, Thailand
| | - Jirawat Trakulmututa
- Center of Sustainable Energy and Green Materials and Department of Chemistry, Faculty of Science, Mahidol University, 999 Phuttamonthon Sai 4 Road, Salaya, Nakhon Pathom 73170, Thailand
| | - Taweechai Amornsakchai
- Center of Sustainable Energy and Green Materials and Department of Chemistry, Faculty of Science, Mahidol University, 999 Phuttamonthon Sai 4 Road, Salaya, Nakhon Pathom 73170, Thailand
- Center of Excellence for Innovation in Chemistry, 272 Rama VI Road, Rajthevi, Bangkok 10400, Thailand
| | - Puangrat Kajitvichyanukul
- Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, 239 Huay Kaew Road, Muang District, Chiang Mai 50200, Thailand
- Sustainable Engineering Research Center for Pollution and Environmental Management, Faculty of Engineering, Chiang Mai University, 239 Huay Kaew Road, Muang District, Chiang Mai 50200, Thailand
| | - Siwaporn Meejoo Smith
- Center of Sustainable Energy and Green Materials and Department of Chemistry, Faculty of Science, Mahidol University, 999 Phuttamonthon Sai 4 Road, Salaya, Nakhon Pathom 73170, Thailand
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Kodithuwakku P, Jayasundara D, Munaweera I, Jayasinghe R, Thoradeniya T, Weerasekera M, Ajayan PM, Kottegoda N. A Review on Recent Developments in Structural Modification of TiO2 For Food Packaging Applications. PROG SOLID STATE CH 2022. [DOI: 10.1016/j.progsolidstchem.2022.100369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Continuous photocatalysis via Z-scheme based nanocatalyst system for environmental remediation of pharmaceutically active compound: Modification, reaction site, defect engineering and challenges on the nanocatalyst. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.118745] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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7
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Wang C, Zhang R, Miao Y, Xue Q, Yu B, Gao Y, Han Z, Shao M. Preparation of LDO@TiO 2 core-shell nanosheets for enhanced photocatalytic degradation of organic pollution. Dalton Trans 2021; 50:17911-17919. [PMID: 34781334 DOI: 10.1039/d1dt03302f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
TiO2-based nanosheet materials with a core-shell structure are expected to be one of the promising photocatalysts for the degradation of organic pollution. It is a challenge to synthesize TiO2 by the desired nucleation and growth process, so most reported TiO2 core-shell photocatalysts are prepared using TiO2 as a core material. Layered double hydroxides (LDHs) are considered ideal platforms to grow TiO2in situ and further serve as additional components to improve the separation of photogenerated charge carriers. In this work, we report the design and fabrication of anatase TiO2-coated ZnAl-layered double oxide (LDO@TiO2) nanosheets, which involve the in situ growth of TiO2 on ZnAl-LDH followed by subsequent calcination treatment. The resulting LDO@TiO2 photocatalyst yields typical core-shell nanosheet morphology with a mesoporous structure, exhibiting excellent photodegradation and mineralization efficiency for organic pollution.
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Affiliation(s)
- Can Wang
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China.
| | - Ruikang Zhang
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China.
| | - Yucong Miao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Qihui Xue
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China.
| | - Borong Yu
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China.
| | - Yuanzhe Gao
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China.
| | - Zhangang Han
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China.
| | - Mingfei Shao
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
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Novel 2D/2D g-C3N4/Bi4NbO8Cl nano-composite for enhanced photocatalytic degradation of oxytetracycline under visible LED light irradiation. J Colloid Interface Sci 2021; 584:320-331. [DOI: 10.1016/j.jcis.2020.09.101] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Revised: 09/23/2020] [Accepted: 09/25/2020] [Indexed: 11/19/2022]
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Abstract
Energy shortage and environmental pollution problems boost in recent years. Photocatalytic technology is one of the most effective ways to produce clean energy—hydrogen and degrade pollutants under moderate conditions and thus attracts considerable attentions. TiO2 is considered one of the best photocatalysts because of its well-behaved photo-corrosion resistance and catalytic activity. However, the traditional TiO2 photocatalyst suffers from limitations of ineffective use of sunlight and rapid carrier recombination rate, which severely suppress its applications in photocatalysis. Surface modification and hybridization of TiO2 has been developed as an effective method to improve its photocatalysis activity. Due to superior physical and chemical properties such as high surface area, suitable bandgap, structural stability and high charge mobility, two-dimensional (2D) material is an ideal modifier composited with TiO2 to achieve enhanced photocatalysis process. In this review, we summarized the preparation methods of 2D material/TiO2 hybrid and drilled down into the role of 2D materials in photocatalysis activities.
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