DFT-proved Z-type ZnO/SnIn4S8 heterojunction for detecting hexavalent chromium
Source abstract
Abstract
In this study, flower-shaped SnIn 4S 8 grew on the surface of ZnO was synthesized by solvothermal method to detect hexavalent chromium (Cr (VI)). The composition, surface structure, valence state, photoelectric capability of ZnO/SnIn 4S 8 were investigated through a series of characterizations. The results found ZnO/SnIn 4S 8 composites show better photocatalytic activities than these of ZnO and SnIn 4S 8. Meanwhile, the mass ratio of ZnO/SnIn 4S 8 could affect the photoelectric properties. When the mass ratio is 1: 4 (ZnO/SnIn 4S 8 -4), it has the best performances among all the composites. Density function theory calculation (DFT) confirms the increased properties could originate from the form of a Z-scheme heterojunction between ZnO and SnIn 4S 8, which facilitates charge separation through the action of an internal electric field, and retains strong redox ability of electrons (e -) or holes (h +). When the photoelectrochemical sensor based on ZnO/SnIn 4S 8-4 was used to detect Cr (VI), it shows the linearity between 0.5 and 300 μM, and limit of detection is 0.039 μM. Thus, Z-scheme ZnO/SnIn 4S 8 heterojunction will provide new insights and potential application in Cr (VI) detection.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Gas Sensing Nanomaterials and Sensors · Copper-based nanomaterials and applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (54)
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