Abstract
Mineral-based photocatalyst is a promising alternative to eliminate the volatile organic compounds (VOCs) air pollutants because of its low-cost and environmental-friendly merits. Herein, BiOCl/TiO2/sepiolite ternary heterogeneous photocatalyst was synthesized through a facile hydrolysis-precipitation method combining with the calcination crystallization procedure. The gaseous formaldehyde (HCHO) was employed as target pollutant to evaluate the photocatalytic activity of as-synthesized samples. The results indicated that BiOCl/TiO2/sepiolite composite performed much significantly higher adsorption and decomposition capacity for HCHO than pure TiO2, BiOCl and TiO2/BiOCl under solar and visible light. Based on the characterizations and density function theory (DFT) simulation results, the enhanced photocatalytic activity was mainly attributed to the synergistic effect between TiO2/BiOCl and sepiolite through the formation of ternary heterojunction. Such structure could lead to the higher adsorption capacity which can provide more reactive sites, and stronger light response ability as well as faster separation efficiency of photoinduced carriers forming more active radicals during the degradation process. Radical scavenger tests and ESR results indicated that photogenerated holes was the main active species in the reaction system. Overall, this study provides an insight into the design and synthesis of environment-friendly and high-effective heterogeneous composite for practical indoor formaldehyde removal.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.