Deposition of WC on TiO2 nanosheets with exposed (001) facets for photocatalytic degradation

School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China; Y. Q. Dong; Y. C. Zhang; School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China; B. H. Ren; School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China; S. N. Liu; School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China; Y. Li; School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China; Y. Sun; School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China

doi:10.15251/djnb.2023.182.523

journal article·2023-04Open access

Deposition of WC on TiO2 nanosheets with exposed (001) facets for photocatalytic degradation

School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, Y. Q. Dong, Y. C. Zhang, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, B. H. Ren, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, S. N. Liu, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, Y. Li, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China, Y. Sun, School of Mechanical Engineering, Chengdu University, Chengdu, 610106, China

Digest Journal of Nanomaterials and Biostructures· Volume 18· Issue 2

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Source abstract

Abstract

Anatase TiO2 nanosheets with exposed (001) facets were prepared by a hydrothermal method under HF condition. Then, commercial WC particles were deposited on TiO2 nanosheets by physical mixing method. The prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy and nitrogen adsorption-desorption isotherms. To investigate the effect of WC loading on the photocatalytic performance, the degradation of Rhodamine B (RhB) dye was conducted under simulated light. The results indicated that the WC/TiO2 exhibited higher photocatalytic activity than pure TiO2 catalyst. When the WC loading was 10 wt%, the degradation efficiency reached 90.2% within 60 min. The enhanced photocatalytic performance may be attributed to the introduction of WC particles which could react as an electron trap and promote the separation of photogenerated electron-hole pairs of TiO2. Meanwhile, the trapping experiment confirmed that superoxide radical (·O2 - ) and hole (h+) played leading roles in the degradation of RhB.

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Research context

Nanomaterials Catalysis & surfaces Materials processing

OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Nanomaterials for catalytic reactions

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

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