SYNTHESIS OF ZnO NANOPARTICLES-REDUCED GRAPHENE OXIDE COMPOSITES AND THEIR INTRINSIC GAS SENSING PROPERTIES

A ZnO nanoparticles (NPs)/reduced graphene oxide (rGO) composite was fabricated via a simple one-step solvothermal method with graphene oxide (GO) and Zn ( NO 3)2 ⋅ 6 H 2 O as the precursors. The morphology, crystal structure and optical properties of the synthesized materials were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Raman spectroscopy and photoluminescence (PL) spectroscopy. The synthesized composite exhibited rGO layers assorted with tiny ZnO NPs. rGO supposedly acted as a template in the solvothermal process, that may promote the preferential attachment of ZnO NPs and prevented the agglomeration of ZnO NPs in the synthesized composite. It was also found that the electrical properties of the composite improved markedly with bare ZnO NPs, without significantly changing the morphology and crystal structure of the ZnO NPs. The main aim of this research is to develop an efficient sensor and to understand the effect of graphene in sensing characteristics. The synthesized composite was exposed to H 2, CO and C 2 H 2 gases to confirm its feasibility for gas sensing, and the results showed preferential detection of reducing gases at low temperature.

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ZnO nanoflowers with single crystal structure towards enhanced gas sensing and photocatalysis

Physical Chemistry Chemical Physics ◽

10.1039/c5cp04860e ◽

2015 ◽

Vol 17 (45) ◽

pp. 30300-30306 ◽

Cited By ~ 37

Author(s):

Sha Zhang ◽

Hsueh-Shih Chen ◽

Katarzyna Matras-Postolek ◽

Ping Yang

Keyword(s):

Crystal Structure ◽

Graphene Oxide ◽

Single Crystal ◽

Reduced Graphene Oxide ◽

Zno Nanoparticles ◽

Photocatalytic Performance ◽

Gas Sensing ◽

High Crystallinity ◽

Reduced Graphene ◽

Average Size

Single crystal ZnO nanoflowers composed of small ZnO nanoparticles with high crystallinity and grown along the {100} facet with an average size of 60 nm have a much better gas sensing response. ZnO–reduced graphene oxide (RGO) composites showed enhanced photocatalytic performance.

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Reduced graphene oxide decorated with CuO–ZnO hetero-junctions: towards high selective gas-sensing property to acetone

Journal of Materials Chemistry A ◽

10.1039/c4ta03931a ◽

2014 ◽

Vol 2 (43) ◽

pp. 18635-18643 ◽

Cited By ~ 99

Author(s):

Chao Wang ◽

Junwu Zhu ◽

Shiming Liang ◽

Huiping Bi ◽

Qiaofeng Han ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Zno Nanoparticles ◽

Gas Sensing ◽

Ternary Composite ◽

Sensing Properties ◽

Reduced Graphene

The CuO–ZnO/rGO ternary composite is successfully prepared, in which valid p–n junctions exist between CuO and ZnO nanoparticles with the aid of rGO sheets. The presence of p–n junctions enables such a composite to possess outstanding sensing properties to acetone.

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ZnO Nanoparticles Embedded on a Reduced Graphene Oxide Nanosheet (ZnO−NPs@r‐GO) as a Proficient Heterogeneous Catalyst for a One‐Pot A 3 ‐Coupling Reaction

European Journal of Inorganic Chemistry ◽

10.1002/ejic.202100368 ◽

2021 ◽

Vol 2021 (35) ◽

pp. 3578-3590

Author(s):

Dikin Patel ◽

Chetan K. Modi ◽

Prafulla K. Jha ◽

Himanshu Srivastava ◽

Sanjeev R. Kane

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Heterogeneous Catalyst ◽

Zno Nanoparticles ◽

Coupling Reaction ◽

Zno Nps ◽

One Pot ◽

Reduced Graphene ◽

Graphene Oxide Nanosheet

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Synthesis and Characterizations of Zinc Oxide on Reduced Graphene Oxide for High Performance Electrocatalytic Reduction of Oxygen

Molecules ◽

10.3390/molecules23123227 ◽

2018 ◽

Vol 23 (12) ◽

pp. 3227 ◽

Cited By ~ 6

Author(s):

Jiemei Yu ◽

Taizhong Huang ◽

Zhankun Jiang ◽

Min Sun ◽

Chengchun Tang

Keyword(s):

Electron Microscopy ◽

Graphene Oxide ◽

Fuel Cells ◽

Oxygen Reduction ◽

Reduced Graphene Oxide ◽

Cyclic Voltammograms ◽

High Electron ◽

Disk Electrode ◽

Zno Nps ◽

Reduced Graphene

Electrocatalysts for the oxygen reduction (ORR) reaction play an important role in renewable energy technologies, including fuel cells and metal-air batteries. However, development of cost effective catalyst with high activity remains a great challenge. In this feature article, a hybrid material combining ZnO nanoparticles (NPs) with reduced graphene oxide (rGO) is applied as an efficient oxygen reduction electrocatalyst. It is fabricated through a facile one-step hydrothermal method, in which the formation of ZnO NPs and the reduction of graphene oxide are accomplished simultaneously. Transmission electron microscopy and scanning electron microscopy profiles reveal the uniform distribution of ZnO NPs on rGO sheets. Cyclic voltammograms, rotating disk electrode and rotating ring disk electrode measurements demonstrate that the hierarchical ZnO/rGO hybrid nanomaterial exhibits excellent electrocatalytic activity for ORR in alkaline medium, due to the high cathodic current density (9.21 × 10−5 mA/cm2), positive onset potential (−0.22 V), low H2O2 yield (less than 3%), and high electron transfer numbers (4e from O2 to H2O). The proposed catalyst is also compared with commercial Pt/C catalyst, comparable catalytic performance and better stability are obtained. It is expected that the ZnO/rGO hybrid could be used as promising non-precious metal cathode in alkaline fuel cells.

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Enhancing NO2 gas sensing performances at room temperature based on reduced graphene oxide-ZnO nanoparticles hybrids

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2014.05.086 ◽

2014 ◽

Vol 202 ◽

pp. 272-278 ◽

Cited By ~ 218

Author(s):

Sen Liu ◽

Bo Yu ◽

Hao Zhang ◽

Teng Fei ◽

Tong Zhang

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Zno Nanoparticles ◽

Room Temperature ◽

Gas Sensing ◽

Reduced Graphene

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Enhanced gas sensing and photocatalytic activity of reduced graphene oxide loaded TiO2 nanoparticles

Chemical Physics Letters ◽

10.1016/j.cplett.2021.138897 ◽

2021 ◽

pp. 138897

Author(s):

Suresh Sagadevan ◽

J. Anita Lett ◽

Getu Kassegn Weldegebrieal ◽

Md Rokon ud Dowla Biswas ◽

Won Chun Oh ◽

...

Keyword(s):

Photocatalytic Activity ◽

Graphene Oxide ◽

Tio2 Nanoparticles ◽

Reduced Graphene Oxide ◽

Gas Sensing ◽

Reduced Graphene

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Reduced graphene oxide for fiber-optic toluene gas sensing

Optics Express ◽

10.1364/oe.24.028290 ◽

2016 ◽

Vol 24 (25) ◽

pp. 28290 ◽

Cited By ~ 22

Author(s):

Yi Xiao ◽

Jianhui Yu ◽

Long Shun ◽

Shaozao Tan ◽

Xiang Cai ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Fiber Optic ◽

Gas Sensing ◽

Reduced Graphene

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Polymer Foam-Supported Chemically Reduced Graphene Oxide Conductive Networks for Gas Sensing

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2018.14398 ◽

2018 ◽

Vol 18 (4) ◽

pp. 2965-2970 ◽

Cited By ~ 3

Author(s):

Jiajia Song ◽

Yanyan Wang ◽

Feng Zhang ◽

Yan Ye ◽

Yanhua Liu ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Gas Sensing ◽

Polymer Foam ◽

Reduced Graphene ◽

Chemically Reduced Graphene Oxide

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Simple synthesis of ZnO nanoparticles on N-doped reduced graphene oxide for the electrocatalytic sensing of l-cysteine

RSC Advances ◽

10.1039/c7ra04052k ◽

2017 ◽

Vol 7 (56) ◽

pp. 35004-35011 ◽

Cited By ~ 13

Author(s):

Suling Yang ◽

Gang Li ◽

Chen Qu ◽

Guifang Wang ◽

Dan Wang

Keyword(s):

Graphene Oxide ◽

Low Temperature ◽

Reduced Graphene Oxide ◽

Zno Nanoparticles ◽

Low Cost ◽

Hydrothermal Process ◽

Simple Synthesis ◽

Zno Nanoparticle ◽

Reduced Graphene ◽

One Step

A new kind of ZnO nanoparticle/N-doped reduced graphene oxide nanocomposite (ZnONPs/N-rGO) was synthesized through a low temperature, low-cost and one step hydrothermal process.

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