Chenglin Zhang , Junxian Qin , Changqing Yang , Yun Hu
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引用次数: 1
Abstract
The conversion of the volatile organic pollutant to industrially valuable chemicals using photocatalysis is a promising endeavor. Herein, ZnS/CdIn2S4 heterojunction with rich sulfur vacancy was constructed via a simple one-pot method for the selective photocatalytic oxidation of toluene to benzaldehyde. ZnS/CdIn2S4 has a suitable band gap and valence band position, thus possessing a mild oxidation ability to generate benzaldehyde while avoiding excessive oxidation. In addition, the presence of tightly bound contact interfaces and sulfur vacancy in ZnS/CdIn2S4 heterojunction facilitates the rapid separation of photogenerated electron-hole. These characteristics of the heterojunction synergistically promoted the selective photocatalytic oxidation of toluene, resulting in ZnS/CdIn2S4 exhibiting the highest benzaldehyde production rate (1025 μmol g−1 h−1) and the highest conversion rate (13.7%), which were 93.1 and 56.9 times higher than those of ZnS and CdIn2S4, respectively. Furthermore, a possible response mechanism has been suggested based on a series of experiments. This study provides new insights into the combination of volatile organic pollutant degradation and high-value chemicals production.
期刊介绍：
JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds.
All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor).
The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.
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