Construction of Flower-like ZnO Nanoclusters on Functionalized Graphene Nanosheets for Room Temperature Formaldehyde Sensing

Author:

Hu Huiyun12,Guo Lanpeng12,Liang Hongping12,Lu Ruofei12,Lv Sitao123,Wang Chenxu12,Liu Liming3,Yang Haihong4,Lee Yi-Kuen56,French Paddy J.7,Li Hao12,Wang Yao12,Zhou Guofu12

Affiliation:

1. Guangdong Provincial Key Laboratory of Optical Information Materials and Technology, Institute of Electronic Paper Displays, South China Academy of Advanced Optoelectronics, South China Normal University, Guangzhou, 510006, P.R. China

2. National Center for International Research on Green Optoelectronics, South China Normal University, Guangzhou, 510006, P.R. China

3. Zhongshan Branch of State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Zhongshan Institute, Zhongshan, 528402, P.R. China

4. Department of Thoracic Oncology, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510006, P.R. China

5. Department of Mechanical & Aerospace Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

6. Department of Electronic & Computer Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong Special Administrative Region

7. BE Laboratory, EWI, Delft University of Technology, Delft, 2628CD, The Netherlands

Abstract

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.

Funder

National Natural Science Foundation of China

Science and Technology Program of Guangzhou

Guangdong Basic and Applied Basic Research Foundation

Innovative Team Project of Education Bureau of Guangdong Province

Guangdong Science and Technology Project-International Cooperation

Startup Foundation from SCNU, Guangdong Provincial Key Laboratory of Optical Information Materials and Technology

Publisher

Bentham Science Publishers Ltd.

Subject

General Medicine

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