PREPARATION AND PROPERTIES OF A NANO-TiO2 COMPOSITE PHOTOCATALYST SUPPORTED BY NATURAL QUARTZ

Xinru Wang, Xuan Wang, Hao Ding, Ruixin Ma, Yu Tu and Wei Li
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Xinru Wang: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, P. R. China†Department of Biomedical Engineering, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510006, P. R. China‡National Engineering Research Center for Tissue Restoration and Reconstruction (NERC-TRR), South China University of Technology, Guangzhou 510006, P. R. China
Xuan Wang: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, P. R. China
Hao Ding: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, P. R. China
Ruixin Ma: �School of Chemical Safety, North China Institute of Science and Technology, Langfang, Hebei Province 065201, P. R. China
Yu Tu: Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, P. R. China
Wei Li: �Beijing Building Materials Academy of Sciences Research, Beijing 100041, P. R. China

Surface Review and Letters (SRL), 2023, vol. 30, issue 04, 1-12

Abstract: The goal of this paper is to improve the technical level of preparing composite photocatalysts with SiO2-supported nano-TiO2, expand the selection range of SiO2 carriers, reduce expenses and understand the influence of SiO2 crystallization behavior. Natural quartz (Q/SiO2) powder was used as a carrier to prepare a Q/SiO2-TiO2 composite photocatalyst by hydrolyzing a butyl titanate solution and performing high-temperature calcination of the hydrolysate. The performance, morphology, structure and mechanism were tested and characterized. In addition, the as-prepared photocatalyst was compared with other amorphous SiO2 carrier composite photocatalysts. The results showed that the Q/SiO2 surface of Q/SiO2-TiO2 contained a uniform load of TiO2 with a 26.98% proportion. Anatase-type TiO2 was mainly present, and the size was 5–10nm. Moreover, Q/SiO2 and TiO2 were firmly combined in the form of Si–O–Ti bonds between the interfaces. The degradation rate of Q/SiO2-TiO2 to methyl orange solution was 99.59% under UV irradiation for 60min, which was equivalent to that of pure nano-TiO2. The degradation performance remained stable after four cycles. Compared with other amorphous SiO2 carriers, Q/SiO2 exhibited a higher load of TiO2. Furthermore, Q/SiO2 played a more significant role in inhibiting the phase transition of TiO2 to rutile and improving the photocatalytic performance.

Keywords: Nano-TiO2; quartz; load; composite photocatalyst (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1142/S0218625X2350018X

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