Facile Fabrication of SrTiO 3 /In 2 O 3 on Carbon Fibers via a Self-Assembly Strategy for Enhanced Photocatalytic Hydrogen Production

Jiantao Niu and Qi Hu ()
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Jiantao Niu: School of Textile and Clothing and Arts and Media, Suzhou Institute of Trade & Commerce, Suzhou 215009, China
Qi Hu: School of Social Development and Public Administration, Suzhou University of Science and Technology, Suzhou 215009, China

Sustainability, 2024, vol. 16, issue 10, 1-14

Abstract: Photocatalytic water splitting by semiconductors is considered a promising and cost-effective method for achieving sustainable hydrogen production. In this study, a CF/SrTiO 3 /In 2 O 3 photocatalytic material with a double-layer core–shell structure was developed. The experimental results indicated that the produced CF/SrTiO 3 /In 2 O 3 composite fiber displayed superior photocatalytic hydrogen production performance, achieving a hydrogen evolution rate of approximately 320.71 μmol/g·h, which is roughly seven times higher than that of the CF/SrTiO 3 fiber alone. The enhanced photocatalytic activity of the CF/SrTiO 3 /In 2 O 3 fiber can be attributed to the heterojunction structure enriched with oxygen vacancies. It was found that these oxygen vacancies created defective states that served as traps for photogenerated electrons, facilitating their migration to the surface defect states and enabling the reduction of H + in water to produce hydrogen. Furthermore, the synergy between the heterojunction structure and the conductivity of the carbon fiber promoted the generation and migration of photogenerated electrons, reduced the recombination of photogenerated electron–hole pairs, and ultimately improved photocatalytic hydrogen production. This study presents a new approach for designing efficient photocatalysts with surface oxygen vacancies on carbon fibers, providing new insights into the sustainable application of photocatalysts.

Keywords: photocatalytic; SrTiO 3; carbon fiber; oxygen vacancy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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