纳米片组装鸟巢状BiVO₄/Bi₂WO₆异质结构气敏性能研究

Research on Gas Sensing Performance of Bird’s Nest Shaped BiVO₄/Bi₂WO₆ Heterostructure Assembled with Nanosheets

Bi2WO6作为一种典型的层状结构,由于其优异的电子转移能力和光吸收性能,已被广泛应用于有机污染物的降解和可见光的催化,而其在气体传感器领域的应用却少有报道。本文采用调控元素V与W的摩尔比例,通过一步水热法构造了Bi2WO6与BiVO4的异质结构,实现了对H2S气体的有效检测,这得益于复合材料之间形成的n-n型异质结构,为气体吸附提供更多可能。通过XRD、SEM、TEM等对复合材料进行了全面表征,阐明了通过电子传输进行气体传感的潜在机理。

Bi2WO6, as a typical layered structure, has been widely used in the degradation of organic pollutants and visible light catalysis due to its excellent electron transfer ability and light absorption performance. However, its application in the field of gas sensors has been rarely reported. This article constructs a heterostructure of Bi2WO6 and BiVO4 through a one-step hydrothermal method by adjusting the ratio of V to W, achieving effective detection of H2S gas. This is due to the n-n type heterostructure formed between the composite materials, providing more possibilities for gas adsorption. The composite materials were comprehensively characterized by XRD, SEM, TEM, etc., elucidating the potential mechanism of gas sensing through electron transfer.