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Chen W, Zhang H, Chen T, Yang L, Wu H, Tong Z, Mao N. TiO 2 modified orthocortical and paracortical cells having enhanced photocatalytic degradation and photoreduction properties. NANOTECHNOLOGY 2021; 32:025714. [PMID: 32992295 DOI: 10.1088/1361-6528/abbcab] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, cortical cells resultant from wool fibers were loaded with TiO2 nanoparticles in a hydrothermal process and were then engineered as organic-nonorganic hybrid composite photocatalysts for both photodegradation of organic dyes and photoreduction of heavy metal ions. The microstructure and photocatalytic properties of TiO2 modified cortical cells (i.e. both orthocortical and paracortical cells) were systematically characterized using a series of analytical techniques including FESEM, TEM, element analysis, Mott-Schottky curve, BET specific surface area, Zeta potentials, as well as XRD, FTIR, XPS, DRS, PL, UPS, EDS and ESR spectra. Their photocatalytic performance and trapping experiments of the TiO2 modified cortical cells were measured in the photodegradation of methylene blue (MB) dye and Congo Red (CR) dye as well as the photoreduction of Cr(VI) ions under visible light irradiation. It was found that anatase TiO2 nanoparticles were chemically grafted on the surface of the two cortical cells via O-Ti4+/O-Ti3+ bonds, and that TiO2 nanoparticles were formed inside the orthocortical cells in the hydrothermal process. The TiO2 modified orthocortical and paracortical cells possessed much higher photocatalytic efficiency than the commercially available TiO2 nanoparticle powder, Degussa P25, in the photodegradation of cationic MB dye and photoreduction of Cr(VI) ions, while their photocatalytic efficiency in the photodegradation of anionic CR dye is smaller because of their greater negative Zeta potentials and photogenerated holes as the main reactive radical species. In comparison with the TiO2 modified paracortical cells, the higher photocatalytic efficiency of the TiO2 modified orthocortical cells was demonstrated in the photodegradation of MB dye solution and this might be due to both the S-doped TiO2 nanoparticles infiltrated into the naturally hydrophilic orthocortical cells and the primary reactive radical species of photogenerated holes being trapped in the cells.
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Affiliation(s)
- Wendou Chen
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Hui Zhang
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Tianyu Chen
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Limeng Yang
- Research Centre for Functional Textile Materials, School of Textile Science & Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Hailiang Wu
- Key Laboratory of Functional Textile Material and Product (Xi'an Polytechnic University), Ministry of Education, Xi'an, Shaanxi 710048, People's Republic of China
| | - Zhi Tong
- School of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an 710048, People's Republic of China
| | - Ningtao Mao
- School of Design, University of Leeds, Leeds, LS2 9JT, United Kingdom
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Gao Y, Fan W, Qu K, Wang F, Guan P, Xu D, Bai H, Shi W. Confined growth of Co–Pi co-catalyst by organic semiconductor polymer for boosting the photoelectrochemical performance of BiVO4. NEW J CHEM 2019. [DOI: 10.1039/c9nj01336a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The significant recombination of carriers and low OER kinetics depress the solar to chemical energy conversion efficiency over BiVO4.
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Affiliation(s)
- Yang Gao
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Weiqiang Fan
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Konggang Qu
- School of Chemistry and Chemical Engineering
- Liaocheng University
- Liaocheng
- P. R. China
| | - Fagen Wang
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Peng Guan
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Dongbo Xu
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Hongye Bai
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Weidong Shi
- School of Chemistry and Chemical Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
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