Hubei Key Laboratory of Radiation Chemistry and Functional Materials, School of Nuclear Technology and Chemistry & Biology, Hubei University of Science and Technology, Xianning 437100, China.
Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei Key Laboratory of Polymer Materials, Key Laboratory of regional development and environmental response in Hubei Province, Faculty of Resources and Environmental Science, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China.
J Environ Sci (China). 2021 May;103:185-195. doi: 10.1016/j.jes.2020.10.019. Epub 2020 Nov 16.
In this work, BiXO (X = W, Mo) are synthesized at different temperatures. The results of tests find the optimal temperatures of BiWO and BiMoO are 180 and 160°C (BW-180, BM-160). Then, BW-180 and BM-160 are further compounded with different contents of CuS. The results of photoelectrochemical (PEC) tests show that CuS can improve the PEC performance of semiconductor materials, and it has better performance when CuS mass fraction is 5%. These maybe the photoelectron potentials generated by CuS/BiXO (X = Mo, W) heterojunction reduce the combination of photogenerated electrons and holes. When the PEC sensor based on 5%-CuS/BW-180 detects Cr(VI), it has a linear range of 1-80 μmol/L with detection limit of 0.95 μmol/L, while the PEC sensor based on 5%-CuS/BM-160 detects Cr(VI) has a linear range of 0.5-230 μmol/L and a detection limit of 0.12 μmol/L. Thus, 5%-CuS/BiXO has potential application in hexavalent chromium detection.
在这项工作中，不同温度下合成了 BiXO（X=W、Mo）。测试结果发现 BiWO 和 BiMoO 的最佳温度分别为 180 和 160°C（BW-180、BM-160）。然后，BW-180 和 BM-160 进一步与不同含量的 CuS 复合。光电化学（PEC）测试结果表明，CuS 可以提高半导体材料的 PEC 性能，当 CuS 质量分数为 5%时性能更好。这可能是因为 CuS/BiXO（X=Mo、W）异质结产生的光电子势降低了光生电子和空穴的复合。基于 5%-CuS/BW-180 的 PEC 传感器检测 Cr(VI)时，线性范围为 1-80 μmol/L，检测限为 0.95 μmol/L，而基于 5%-CuS/BM-160 的 PEC 传感器检测 Cr(VI)时，线性范围为 0.5-230 μmol/L，检测限为 0.12 μmol/L。因此，5%-CuS/BiXO 有可能应用于六价铬的检测。
