Department of Materials Science and Engineering, National Dong Hwa University, Shoufeng, Hualien, 97401, Taiwan.
Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan; Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, 10608, Taiwan.
J Hazard Mater. 2019 Apr 5;367:647-657. doi: 10.1016/j.jhazmat.2019.01.017. Epub 2019 Jan 9.
Heterostructured nanomaterials can paid more significant attention in environmental safety for the detection and degradation/removal of hazardous toxic chemicals over a decay. Here, we report the preparation of hierarchically nanostructured shuriken like bismuth vanadate (BiVO) as a bifunctional catalyst for photocatalytic degradation and electrochemical detection of highly toxic hexavalent chromium (Cr(VI)) using the green deep eutectic solvent reline, which allows morphology control in one of the less energy-intensive routes. The SEM results showed a good dispersion of BiVO catalyst and the HR-TEM revealed an average particle size of ca. 5-10 nm. As a result, the BiVO exhibited good photocatalytic activity under UV-light about 95% reduction of Cr(VI) to Cr(III) was observed in 160 min. The recyclability of BiVO catalyst exhibited an appreciable reusability and stability of the catalyst towards the photocatalytic reduction of Cr(VI). Also, the BiVO-modified screen printed carbon electrode (BiVO/SPCE) displayed an excellent electrochemical performance towards the electrochemical detection of Cr(VI). Besides, the BiVO/SPCE demonstrated tremendous electrocatalytic activity, lower linear range (0.01-264.5 μM), detection limit (0.0035 μM) and good storage stability towards the detection of Cr(VI). Importantly, the BiVO modified electrode was also found to be a good recovery in water samples for practical applications.
层状纳米结构的肖基纳米材料在环境安全方面受到了更多的关注，因为它们可以检测和降解/去除有毒有害物质。在这里，我们报告了一种分层纳米结构的忍者形状的五氧化二铋（BiVO）作为一种双功能催化剂的制备，用于使用绿色深共熔溶剂（一种在能量消耗较少的途径之一中允许控制形态的溶剂）进行光催化降解和电化学检测剧毒六价铬（Cr(VI)）。SEM 结果表明 BiVO 催化剂具有良好的分散性，HR-TEM 显示平均粒径约为 5-10nm。结果表明，BiVO 在紫外光下表现出良好的光催化活性，在 160 分钟内观察到 Cr(VI)的还原率约为 95%。BiVO 催化剂的可回收性表现出对 Cr(VI)光催化还原的良好的可重复使用性和稳定性。此外，BiVO 修饰的丝网印刷碳电极（BiVO/SPCE）在电化学检测 Cr(VI)方面表现出优异的电化学性能。此外，BiVO/SPCE 表现出巨大的电催化活性、较低的线性范围（0.01-264.5μM）、检测限（0.0035μM）和良好的储存稳定性，用于 Cr(VI)的检测。重要的是，在实际应用中，修饰电极在水样中的回收率也很好。
