Topic
Photocatalysis
About: Photocatalysis is a research topic. Over the lifetime, 67088 publications have been published within this topic receiving 2145233 citations. The topic is also known as: photocatalyst.
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TL;DR: In this article, a high performance photocatalytic TiO2 thin film was successfully obtained by reactive DC magnetron sputtering, which was deposited onto SiO2-coated glass at a substrate temperature of 220°C using a titanium metal target.
318 citations
TL;DR: In this paper, a series of Bi2MoO6/ZnO hierarchical heterostructured photocatalysts were synthesized by a solvothermal method and their performance was evaluated with visible-light irradiation.
Abstract: The construction of heterostructures is regarded as an excellent strategy to achieve efficient charge separation and improved photocatalytic activity. Herein, a series of Bi2MoO6/ZnO hierarchical heterostructured photocatalysts were synthesized by a solvothermal method. The morphology of Bi2MoO6 grown on the surface of ZnO nanorods could be controlled by adjusting the experimental conditions. The synthesized samples were characterized by various analytical techniques and their photocatalytic performance was evaluated by photocatalytic reduction of Cr(VI) under visible-light irradiation. Compared with those of pure Bi2MoO6 and ZnO, the Bi2MoO6/ZnO composites showed higher photocatalytic activity towards the reduction of Cr(VI). The enhanced photocatalytic activity was mainly attributed to the formation of a heterojunction between Bi2MoO6 and ZnO, which effectively facilitated the separation and transfer of electrons and holes. In addition, the Bi2MoO6/ZnO photocatalysts maintained good stability after three cycles of Cr(VI) photoreduction. A possible photocatalytic mechanism of the as-synthesized composites was proposed.
317 citations
TL;DR: Fe3+-doped TiO2 (Fe-TiO2) porous microspheres were prepared by controlled hydrolysis of Ti(OC4H9)4 with water generated "in situ" via an esterification reaction between acetic acid and ethanol, followed by hydrothermal treatment.
317 citations
TL;DR: In this paper, surface hybridization of ZnO with graphite-like carbon layers was proposed to suppress the photocorrosion of nanoparticles, and as-prepared samples exhibited high activity even after 720 h of photocatalysis reaction.
Abstract: A method to suppress the photocorrosion of ZnO nanoparticles was developed by surface hybridization of ZnO with graphite-like carbon layers. The presence of carbon on the surface of the ZnO could significantly suppress the coalescence and crystal growth of ZnO nanoparticles during high-temperature treatment. The nanosized structure of ZnO was well preserved even after high-temperature calcination. The photocatalytic activity of ZnO was enhanced by hybridization with carbon layers attributed to the improved adsorption ability and crystallinity. The as-prepared samples exhibited high activity even after 720 h of photocatalysis reaction, while the pure ZnO nanoparticle was almost deactivated in 100 h due to serious photocorrosion. The as-prepared samples also showed much better activity under extreme pH conditions than that of pure ZnO. The mechanism of photocorrosion suppression and higher stability was then systematically investigated based on the crystal structure and the photocatalysis degradation process.
317 citations
TL;DR: A sandwich-structured photocatalyst shows an excellent performance in degradation reactions of a number of organic compounds under UV, visible light, and direct sunlight.
Abstract: A sandwich-structured photocatalyst shows an excellent performance in degradation reactions of a number of organic compounds under UV, visible light, and direct sunlight (see picture). The catalyst was synthesized by a combination of nonmetal doping and plasmonic metal decoration of TiO2 nanocrystals, which improves visible-light activity and enhances light harvesting and charge separation, respectively.
317 citations