纳米团簇
石墨烯
甲醛
材料科学
纳米复合材料
纳米技术
氧化物
纳米结构
选择性
化学工程
催化作用
化学
有机化学
冶金
工程类
作者
Yao Wang,Huiyun Hu,Lanpeng Guo,Hongping Liang,Ruofei Lu,Sitao Lv,Chenxu Wang,Liming Li,Haihong Yang,Yi-Kuen Lee,P.J. French,Hao Li,Guofu Zhou
出处
期刊:Current Chinese science
日期:2023-08-01
卷期号:3 (4): 275-284
标识
DOI:10.2174/2210298103666230501154634
摘要
Background: Formaldehyde (HCHO) is one of the sources of indoor air pollution and a recognized carcinogenic gas, which sets a huge threat to human health. Therefore, it is urgent to develop a formaldehyde gas sensor with high efficiency, low consumption, and low limit of detection. Methods: With solvothermal and supramolecular assembly methods, we fabricate a nanocomposite of ZnO/5-aminonaphthalene-1-sulfonic acid (ANS)-reduced graphene oxide (rGO) through in situ assembling flower-like ZnO nanoclusters on ANS-modified graphene nanosheets for room temperature formaldehyde detection. Results: The flower-like ZnO/ANS-rGO based gas sensor exhibits high response (32%, 5 ppm), ultra-fast response/recovery times (18/23 s), high selectivity, long-term stability and a low practical limit of detection (pLOD) of 1 ppm toward HCHO at room temperature, offering significant advantages and competitiveness in chemiresistive room temperature HCHO sensors. Conclusion: The unique flower-like nanostructure of ZnO and the functionalization with ANS molecules jointly improved the HCHO sensing performance of the composite at room temperature. This work provides a new approach to designing and preparing high-performance room temperature gas sensing materials.
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