Exploring gas-sensing characteristics of (CH2OH)(2) with controlling the morphology of BiVO4 by adjusting pH of solution
Exploring gas-sensing characteristics of (CH2OH)(2) with controlling the morphology of BiVO4 by adjusting pH of solution
复制标题
通过调节溶液pH值控制BiVO4形貌探索(CH2OH)(2)的气敏特性
DOI：
10.1016/j.jallcom.2020.158400
复制
发表时间：
2021
影响因子：
6.2
通讯作者：
Xu Xiaohui
中科院分区：
文献类型：
--
作者：
Pei Shitu;Ma Shuyi;Xu Xiaoli;Almamoun Omer;Ma Yaotong;Xu Xiaohui
通过简单的水热法成功制备了不同形态的bivo4样品。通过改变溶剂的pH值来调节它们的形态。表征结果表明，典型的BiVO4-1呈十角形，BiVO4-6呈珊瑚状。气敏试验结果表明，类珊瑚BiVO4-6具有优异的气敏响应。（340°C时响应值达到86.49-100 ppm EG），即使暴露在5 ppm EG下，传感器仍然给出明显的响应值（10.21）。对EG具有良好的选择性可能是由于EG具有最低的键离解能，而反应增强的原因可能是晶粒尺寸的减小和表面积的增加。因此，所有的测试结果都表明，类似珊瑚的BiVO4-6是检测EG的有希望的候选者。
Different morphologies of BiVO4samples have been successfully fabricated via a facile hydrothermal method. Their morphologies were modulated via altering the pH of solvent. The characterization results reveal that the typical BiVO4-1 is decagonal and BiVO4-6 is coral-like. The gas sensing test results illustrate that the coral-like BiVO4-6 has an excellent gas-sensing response. (The response value reaches 86.49–100 ppm EG at 340 °C) and the sensor still gives an obvious response value (10.21) even upon exposure to 5 ppm EG. The good selectivity toward EG might be due to that EG owns the lowest bond dissociation energy, and the reason for enhancing responses can be the reduction of grain size and the increase of surface area. Thus, all test results illustrate that the coral-like BiVO4-6 is a promising candidate to detect EG.