Transition metal elements-doped SnO2 for ultrasensitive and rapid ppb-level formaldehyde sensing

被引：8
|
作者：
Han, Zejun [1 ]
Tang, Yunxiang [1 ]
Lu, Guixia [2 ]
Qi, Yuan [1 ]
Wu, Hao [3 ]
Yang, Zhengyi [1 ]
Han, Hecheng [1 ]
Zhang, Xue [1 ]
Wu, Lili [1 ]
Wang, Zhou [1 ]
Liu, Jiurong [1 ]
Wang, Fenglong [1 ,4 ]
机构：
[1] Shandong Univ, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jinan 250061, Shandong, Peoples R China
[2] Qingdao Univ Technol, Sch Civil Engn, Qingdao 266033, Shandong, Peoples R China
[3] City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Peoples R China
[4] Shandong Univ, Shenzhen Res Inst, A301 Virtual Univ Pk South Dist Nanshan High Tech, Shenzhen, Peoples R China
来源：
HELIYON | 2023年 / 9卷 / 02期
基金：
中国国家自然科学基金;
关键词：
SnO2; Fe and Ni dopants; Formaldehyde sensing; Electronic structure; Crystal structure; Catalytic effect; IN2O3; NANOPARTICLES; HIGH RESPONSE; GAS; PERFORMANCE; NIO; NANOSHEETS; SENSOR; PHOTOCATALYST; FABRICATION; NANOTUBES;
D O I：
10.1016/j.heliyon.2023.e13486
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Pristine SnO2, Fe-doped SnO2 and Ni-doped SnO2 were synthesized using facile hydrothermal method. Analysis based on XRD, TEM and UV-Vis DRS measurements demonstrated the suc-cessful insertion of Fe and Ni dopants into SnO2 crystal. Formaldehyde-detection measurements revealed that transition metal-doped SnO2 exhibited improved formaldehyde-sensing properties compared with that of pristine SnO2. When the amount of incorporated dopant (Fe or Ni) was 4 at.%, the most effective enhancement on sensing performance of SnO2 was obtained. At 160 degrees C, the 4 at.% Fe-SnO2 and 4 at.% Ni-SnO2 exhibited higher response values of 7.52 and 4.37 with exposure to low-concentration formaldehyde, respectively, which were 2.4 and 1.4 times higher than that of pristine SnO2. The change of electronic structure and crystal structure as well as catalytic effect of transition metals are chiefly responsible for the enhanced sensing properties.
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页数：11
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