Reduced graphene oxide-zinc oxide nano-composites for gas sensing applications

Reduced graphene oxide (rGO) is a reduced form of graphene oxide used extensively in gas sensing applications. On the other hand, in its pristine form, graphene has shortages and is generally utilized in combination with other metal oxides to improve gas sensing capabilities. There are different ways of adding rGO to different metal oxides with various morphologies. This study focuses on rGO-loaded metal oxide nanofiber (NF) synthesized using an electrospinning method. Different amounts of rGO were added to the metal oxide precursors, and after electrospinning, the gas response is enhanced through different sensing mechanisms. This review paper discusses rGO-loaded metal oxide NFs gas sensors.

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Synthesis of Cu2O-Modified Reduced Graphene Oxide for NO2 Sensors

Sensors ◽

10.3390/s21061958 ◽

2021 ◽

Vol 21 (6) ◽

pp. 1958

Author(s):

Manman Huang ◽

Yanyan Wang ◽

Shuyang Ying ◽

Zhekun Wu ◽

Weixiao Liu ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Gas Sensing ◽

Thermal Reduction ◽

Oxide Semiconductors ◽

Research Attention ◽

Sensing Applications ◽

Reduced Graphene ◽

Significant Research ◽

P Type

Nowadays, metal oxide semiconductors (MOS)-reduced graphene oxide (rGO) nanocomposites have attracted significant research attention for gas sensing applications. Herein, a novel composite material is synthesized by combining two p-type semiconductors, i.e., Cu2O and rGO, and a p-p-type gas sensor is assembled for NO2 detection. Briefly, polypyrrole-coated cuprous oxide nanowires (PPy/Cu2O) are prepared via hydrothermal method and combined with graphene oxide (GO). Then, the nanocomposite (rGO/PPy/Cu2O) is obtained by using high-temperature thermal reduction under Ar atmosphere. The results reveal that the as-prepared rGO/PPy/Cu2O nanocomposite exhibits a maximum NO2 response of 42.5% and is capable of detecting NO2 at a low concentration of 200 ppb. Overall, the as-prepared rGO/PPy/Cu2O nanocomposite demonstrates excellent sensitivity, reversibility, repeatability, and selectivity for NO2 sensing applications.

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The ZnFe2O4@mZnO-N/RGO nano-composites as a carrier and an intelligent releaser drug with dually pH- and ultrasound-triggered controlled

New Journal of Chemistry ◽

10.1039/d0nj04758a ◽

2021 ◽

Author(s):

Mojtaba Rostami ◽

Ali Sobhani-Nasab ◽

Mahdi Fasihi-Ramandi ◽

Alireza Badiei ◽

Mehdi Rahimi-Nasrabadi ◽

...

Keyword(s):

Zinc Oxide ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Zinc Ferrite ◽

Ph Sensitive ◽

Nano Composites ◽

Nitrogen Doped ◽

Reduced Graphene

In this paper, zinc ferrite@meso-porous (abbreviated as m) zinc oxide-nitrogen doped reduced graphene oxide (ZnFe2O4@mZnO-N/RGO) and zinc ferrite@mZnO-reduced graphene oxide (ZnFe2O4@mZnO-RGO) dual ultrasound (US) and pH-sensitive nano-devices have been prepared...

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Reduced graphene oxide anchored with zinc oxide nanoparticles with enhanced photocatalytic activity and gas sensing properties

RSC Advances ◽

10.1039/c4ra12707b ◽

2014 ◽

Vol 4 (104) ◽

pp. 60253-60259 ◽

Cited By ~ 43

Author(s):

Jianjiang He ◽

Chunge Niu ◽

Chao Yang ◽

Jide Wang ◽

Xintai Su

Keyword(s):

Zinc Oxide ◽

Photocatalytic Activity ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Zinc Oxide Nanoparticles ◽

Gas Sensing ◽

Oxide Nanoparticles ◽

Reduced Graphene ◽

Gas Sensing Properties ◽

Calcination Method

Reduced graphene oxide (rGO)–zinc oxide (ZnO) composites were synthesized by a two-step hydrolysis–calcination method, using GO and Zn(Ac)2 as precursors.

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Zinc Oxide/Reduced Graphene Oxide Nanocomposites for Rapid Detection of Toluene Gas at Room Temperature

Sensor Letters ◽

10.1166/sl.2020.4288 ◽

2020 ◽

Vol 18 (10) ◽

pp. 745-749

Author(s):

Chih-Chia Wang ◽

Chiu-Hung Liu ◽

Hsuan-Hua Hsieh ◽

Chih-Wei Tang ◽

Chen-Bin Wang

Keyword(s):

Zinc Oxide ◽

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Room Temperature ◽

Gas Sensing ◽

Fast Response ◽

Reduced Graphene ◽

New Strategy ◽

Recovery Times ◽

Response And Recovery

In this study, a nanostructured zinc oxide/reduced graphene oxide (ZnO/rGO) composite was deposited on a quartz crystal microbalance (QCM) as a toluene gas sensor at room temperature. A series of ZnO, rGO and ZnO/rGO sensing materials was fabricated and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), and Raman spectroscopy. There was significant efficiency of the ZnO/rGO composite on the sensing performance for toluene. For specific gas fluxes, the nanostructured ZnO/rGO offered sufficient paths and region for vapor diffusion and adsorption. The sensing test results illustrated that the nanostructured ZnO/rGO composite showed significant enhancement in the frequency shifts (△f) for toluene comparing to pure ZnO and rGO. Also, the ZnO/rGO-coated QCM sensor displayed a fast response (both the response and recovery times < 30 s) and reproducibility for sensing toluene gas at room temperature. We believe that the novel insights on ambient temperature gas sensing on nanostructured ZnO/rGO composite could provide a new strategy for preparing a highly efficient sensing materials.

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