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Title: Simultaneous Detection and Removal of Formaldehyde at Room Temperature: Janus Au@ZnO@ZIF-8 Nanoparticles

Abstract

The detection and removal of volatile organic compounds (VOCs) are of great importance to reduce the risk of indoor air quality concerns. Our study reports the rational synthesis of a dual-functional Janus nanostructure and its feasibility for simultaneous detection and removal of VOCs. The Janus nanostructure was synthesized via an anisotropic growth method, composed of plasmonic nanoparticles, semiconductors, and metal organic frameworks (e.g., Au@ZnO@ZIF-8). It exhibits excellent selective detection to formaldehyde (HCHO, as a representative VOC) at room temperature over a wide range of concentrations (from0.25 to 100 ppm), even in the presence of water and toluene molecules as interferences. Additionally, HCHOwas also found to be partially oxidized into non-toxic formic acid simultaneously with detection. The mechanism underlying this technology was unraveled by both experimental measurements and theoretical calculations: ZnO maintains the conductivity, while ZIF-8 improves the selective gas adsorption; the plasmonic effect of Au nanorods enhances the visible-light-driven photocatalysis of ZnO at room temperature.

Authors:
 [1];  [2];  [3];  [3];  [1];  [3];  [4];  [1]
  1. Virginia Commonwealth Univ., Richmond, VA (United States). Dept. of Mechanical and Nuclear Engineering
  2. Univ. of California, Riverside, CA (United States). Dept. of Chemistry
  3. Virginia Commonwealth Univ., Richmond, VA (United States). Dept. of Physics
  4. China Univ. of Petroleum, Qingdao (China). College of Science
Publication Date:
Research Org.:
Virginia Commonwealth Univ., Richmond, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Science Foundation (NSF)
OSTI Identifier:
1411759
Grant/Contract Number:  
FG02-96ER45579; AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Nano-Micro Letters
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2311-6706
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; indoor air quality; volatile organic compounds; janus structure; metal organic frameworks; plasmonic nanoparticles

Citation Formats

Wang, Dawei, Li, Zhiwei, Zhou, Jian, Fang, Hong, He, Xiang, Jena, Puru, Zeng, Jing-Bin, and Wang, Wei-Ning. Simultaneous Detection and Removal of Formaldehyde at Room Temperature: Janus Au@ZnO@ZIF-8 Nanoparticles. United States: N. p., 2017. Web. doi:10.1007/s40820-017-0158-0.
Wang, Dawei, Li, Zhiwei, Zhou, Jian, Fang, Hong, He, Xiang, Jena, Puru, Zeng, Jing-Bin, & Wang, Wei-Ning. Simultaneous Detection and Removal of Formaldehyde at Room Temperature: Janus Au@ZnO@ZIF-8 Nanoparticles. United States. doi:10.1007/s40820-017-0158-0.
Wang, Dawei, Li, Zhiwei, Zhou, Jian, Fang, Hong, He, Xiang, Jena, Puru, Zeng, Jing-Bin, and Wang, Wei-Ning. Mon . "Simultaneous Detection and Removal of Formaldehyde at Room Temperature: Janus Au@ZnO@ZIF-8 Nanoparticles". United States. doi:10.1007/s40820-017-0158-0. https://www.osti.gov/servlets/purl/1411759.
@article{osti_1411759,
title = {Simultaneous Detection and Removal of Formaldehyde at Room Temperature: Janus Au@ZnO@ZIF-8 Nanoparticles},
author = {Wang, Dawei and Li, Zhiwei and Zhou, Jian and Fang, Hong and He, Xiang and Jena, Puru and Zeng, Jing-Bin and Wang, Wei-Ning},
abstractNote = {The detection and removal of volatile organic compounds (VOCs) are of great importance to reduce the risk of indoor air quality concerns. Our study reports the rational synthesis of a dual-functional Janus nanostructure and its feasibility for simultaneous detection and removal of VOCs. The Janus nanostructure was synthesized via an anisotropic growth method, composed of plasmonic nanoparticles, semiconductors, and metal organic frameworks (e.g., Au@ZnO@ZIF-8). It exhibits excellent selective detection to formaldehyde (HCHO, as a representative VOC) at room temperature over a wide range of concentrations (from0.25 to 100 ppm), even in the presence of water and toluene molecules as interferences. Additionally, HCHOwas also found to be partially oxidized into non-toxic formic acid simultaneously with detection. The mechanism underlying this technology was unraveled by both experimental measurements and theoretical calculations: ZnO maintains the conductivity, while ZIF-8 improves the selective gas adsorption; the plasmonic effect of Au nanorods enhances the visible-light-driven photocatalysis of ZnO at room temperature.},
doi = {10.1007/s40820-017-0158-0},
journal = {Nano-Micro Letters},
number = 1,
volume = 10,
place = {United States},
year = {2017},
month = {10}
}

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    Works referencing / citing this record:

    Metal–Organic Framework-Based Sensors for Environmental Contaminant Sensing
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    Metal–Organic Framework-Based Sensors for Environmental Contaminant Sensing
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