TiO2 core-shell microspheres were prepared by a simple one-step hydrothermal method.The obtained TiO2 was an anatase crystal phase and had an irregular core-shell structure,and the surface of the microspheres was composed of regular octahedral particles.The gas sensitivity test results shown that the sample had an excellent response to formaldehyde gas,and a significant photocurrent response to 10 ppm of formaldehyde gas,and has the largest response to 30 ppm of formaldehyde gas.The charge microscopic kinetics of the sample shown excellent photogenerated charge carrier separation and transmission efficiency.Good gas sensitivity may be related to its rough surface and large specific surface area.The special morphology promoted the adsorption of gas and provided numerous surface-active sites to catalyze the reaction with formaldehyde.
Zhang Hongguang, Wang Guowei, Wang Meng, Wang Yu, Xia Chunhui, Fu Shuang
. Photoelectric sensing property of TiO2 core-shell microsphere for formaldehyde[J]. New Chemical Materials, 2020
, 48(9)
: 137
-140
.
DOI: 10.19817/j.cnki.issn 1006-3536.2020.09.029
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