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

Journal Article · · Nano-Micro Letters
 [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

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.

Research Organization:
Virginia Commonwealth Univ., Richmond, VA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
FG02-96ER45579; AC02-05CH11231
OSTI ID:
1411759
Journal Information:
Nano-Micro Letters, Vol. 10, Issue 1; ISSN 2311-6706
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 70 works
Citation information provided by
Web of Science

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Cited By (9)

Electronic Noses: From Advanced Materials to Sensors Aided with Data Processing journal December 2018
Interface‐Regulated Contact Electrification for Power‐Free and Highly Selective Gas Sensing journal August 2019
From Zeolitic Imidazolate Framework-8 to Metal-Organic Frameworks (MOFs): Representative Substance for the General Study of Pioneering MOF Applications journal November 2018
Bi Nanoparticles Anchored in N-Doped Porous Carbon as Anode of High Energy Density Lithium Ion Battery journal June 2018
Metal–Organic Framework-Based Sensors for Environmental Contaminant Sensing journal July 2018
Pressure-regulated synthesis of Cu(TPA)·(DMF) in microdroplets for selective CO 2 adsorption journal January 2019
Ultrathin ZIF-8 film containing polyoxometalate as an enhancer for selective formaldehyde sensing journal January 2018
A self-enhanced and recyclable catalytic system constructed from magnetic bi-nano-bionic enzymes for real-time control of RAFT polymerization journal January 2020
UV-activated room-temperature gas sensing mechanism of polycrystalline ZnO journal October 2009