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: The CuFe2O4@C3N4 sample exhibited stable performance without obvious loss of catalytic activity after five successive runs, showing a promising application for the photo-oxidative degradation of environmental contaminants.
321 citations
TL;DR: A carbon-doped SnS2 (SnS2-C) metal dichalcogenide nanostructure is synthesized, which exhibits a highly active and selective photocatalytic conversion of CO2 to hydrocarbons under visible-light, and represents an important contribution towards high quantum efficiency artificial photosynthesis based on gas phase photoc atalytic CO2 reduction under visible light.
Abstract: Photocatalytic formation of hydrocarbons using solar energy via artificial photosynthesis is a highly desirable renewable-energy source for replacing conventional fossil fuels. Using an l-cysteine-based hydrothermal process, here we synthesize a carbon-doped SnS2 (SnS2-C) metal dichalcogenide nanostructure, which exhibits a highly active and selective photocatalytic conversion of CO2 to hydrocarbons under visible-light. The interstitial carbon doping induced microstrain in the SnS2 lattice, resulting in different photophysical properties as compared with undoped SnS2. This SnS2-C photocatalyst significantly enhances the CO2 reduction activity under visible light, attaining a photochemical quantum efficiency of above 0.7%. The SnS2-C photocatalyst represents an important contribution towards high quantum efficiency artificial photosynthesis based on gas phase photocatalytic CO2 reduction under visible light, where the in situ carbon-doped SnS2 nanostructure improves the stability and the light harvesting and charge separation efficiency, and significantly enhances the photocatalytic activity. Photocatalytic reduction of CO2 to hydrocarbons is a promising route to both CO2 utilization and renewable fuel production. Here the authors identify that carbon-doped SnS2 possesses a high catalytic efficiency towards CO2 reduction owing to low photogenerated charge recombination rates.
320 citations
TL;DR: In this article, the effect of dyehouse effluent strength on decolourization kinetics, along with possible advantages of the ferrioxalate-photo-fenton/UV-A process over the conventional photo-Fenton (Fe 2+ /H 2 O O 2 /UV-C) process, were studied in a novel batch photoreactor.
319 citations
TL;DR: In this article, the surface properties of ZnO ultrafine particles were studied using TEM, XRD, BET, SPS, EPR, IR, and XPS.
319 citations
TL;DR: X-ray photoelectron spectroscopy analysis results revealed that the Cr cations doped at the Sr2+ site were all trivalent state (Cr3+), while those doping at the Ti4+Site were mixed valent states (Cr2+ and Cr6+), and the different photocatalytic activities of H2 evolution are supposed to closely relate to the different valentStates in SrTiO3.
Abstract: Usually, SrTiO3 monodoped with Cr cations at the Ti4+ site hardly shows visible light photocatalytic activity. Revealing the origin of this issue is important for us to find an alternative approach to make SrTiO3 active under visible light irradiation. In this paper, two Cr-doped SrTiO3(Sr0.95Cr0.05)TiO3 and Sr(Ti0.95Cr0.05)O3were synthesized by a conventional solid-state reaction method, and their photophysical and photocatalytic properties were studied comparatively. It was found that both (Sr0.95Cr0.05)TiO3 and Sr(Ti0.95Cr0.05)O3 showed considerable absorption to visible light. However, their photocatalytic activities for H2 evolution from aqueous methanol solution under visible light irradiation were significantly different: the H2 evolution rate over (Sr0.95Cr0.05)TiO3 (∼21 μmol/h) was more than 100 times that over Sr(Ti0.95Cr0.05)O3 (∼0.2 μmol/h). X-ray photoelectron spectroscopy analysis results revealed that the Cr cations doped at the Sr2+ site were all trivalent state (Cr3+), while those doped ...
319 citations