Selective Detection of Xylene by NiO Functionalized ZnO Nanoflowers

doi:10.3969/j.issn.1006-396X.2022.03.007

Abstract

Abstract:

A ZnO nanoflower hybrid material loaded with NiO nanoparticles was presented,and then it was investigated in XRD, morphology and gas sensing properties.The results show that surface loaded NiO nanoparticles modulated the electric channel of ZnO nanoflowers.The response value of heterojunction gas sensing material with optimized NiO loading amount to xylene is increased by 3.3 times compared with that of pristine ZnO.In addition,the selectivity of the sensor is enhanced and response time decreases.From a broader perspective,the methods for functionalized gas sensors of high?performance semiconductor metal oxide (SMOX) are proposed by introducing surface heterostructure.

Key words: Xylene, Gas sensor, NiO?functionalized ZnO, Surface functionalization

摘要：

制备了一种负载NiO纳米粒子的ZnO纳米花杂化材料，并对其进行了XRD分析、形貌分析及气体传感性能测试。结果表明，表面负载的NiO纳米粒子调节了ZnO纳米花的导电通道；与纯ZnO材料相比，NiO负载量优化后的异质结气敏材料对二甲苯的响应值提高了3.3倍；传感器的选择性得到提高，响应时间缩短。从更广泛的角度提出了通过引入表面异质结构进行功能化修饰高性能半导体金属氧化物气体传感器的方法。

关键词: 二甲苯, 气体传感器, NiO功能化修饰ZnO, 表面功能化修饰

CLC Number:

TQ132.4

Yan Zheng, Hong Gong, Rui Wang. Selective Detection of Xylene by NiO Functionalized ZnO Nanoflowers[J]. Journal of Petrochemical Universities, 2022, 35(3): 43-48.

郑妍, 宫红, 王锐. NiO功能化修饰ZnO纳米花对二甲苯的选择性检测[J]. 石油化工高等学校学报, 2022, 35(3): 43-48.

Figures/Tables 9

Fig.1 Schematic diagram of gas sensor

Fig.2 XRD pattern of pure ZnO and NiO/ZnO composites

Fig.3 Low and high magnification SEM and TEM images of samples

Fig.4 XPS O1s of the pure ZnO and NZO?5.0

Fig.5 Responses values of pure ZnO sensors and NiO/ZnO composites sensors at different operating temperature for 100 μg/g xylene

Fig.6 Responses of pure ZnO sensors and NiO/ZnO composites sensors for noxious gas at 382 ℃

Fig.7 The response curves of pure ZnO sensors and NiO/ZnO composite sensors

Fig.8 The response?recovery curves of pure ZnO sensors and NiO/ZnO composite sensors

Fig.9 The possible mechanism of the enhanced performance of the ZnO and NZO?5.0 sensor

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