Affiliations 

  • 1 Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China; Department of Geology Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia; School of Environmental Studies, China University of Geosciences, Wuhan 430074 China
  • 2 School of Management, Henan University of Technology, Zhengzhou, 450001, China
  • 3 Henan Province Engineering Research Center for Forest Biomass Value-added Products, School of Forestry, Henan Agricultural University, Zhengzhou, 450002, China. Electronic address: pengwanxi@163.com
  • 4 Young Researchers and Elite Club, Bushehr Branch, Islamic Azad University, Bushehr, Iran. Electronic address: zohreh_parsaee@yahoo.com
Anal Chim Acta, 2019 Mar 21;1051:120-128.
PMID: 30661608 DOI: 10.1016/j.aca.2018.11.014

Abstract

The ultrasound wave assisted synthesis of a novel ZnWO3/rGO hybrid nono composition (ZnWO3/rGO HNC) as a high performance sensor for formaldehyde (FA) has been reported. Different techniques of analysis such as XRD, FE-SEM, TGA, XPS, HRTEM and BET were applied for morphological and spectroscopic characterization of the ZnWO3/rGO HNC. The sensing evaluation of the constructed sensor showed high selectivity, sensitivity and a linear correlation between achieved responses and concentration of target gas (1-10 ppm) with R2 = 0.993 at temperature of 95 °C. The determination of FA was validated and performed using gas chromatography-mass spectrometry combined by solid phase micro-extraction after derivatization with O-(2,3,4,5,6-pentafluoro-benzyl)-hydroxylamine hydrochloride. Validation was carried out in terms of limit of detection linearity, precision, and recovery. The mechanistic evaluation of sensing behavior of the ZnWO3/rGO HNC was interpreted based on large specific surface area (SSA) to volume, mesoporous structure and the heterojunction between rGO and ZnWO3 at the interface between the rGO and ZnWO3.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.