Gas sensitivity of heterojunction TiO2NT/GO materials prepared by a simple method with low-concentration acetone

Jiang, Lili; Tu, Sihao; Yu, Haitao; Meng, Yimin; Zhao, Yue; Hou, Xingang

doi:10.1016/j.ceramint.2019.10.288

Cited by 14 publications

(3 citation statements)

References 32 publications

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“…Figure 10 displays the dynamic gas-sensitive response curve of the sensor based on the MoS 2 /rGO/GQDs-2 hybrids to different NO 2 gas concentrations at room temperature. As mentioned in previous reports, the gas sensitivity at high NO 2 gas concentrations is stronger than that at low concentrations because of adsorption and desorption during the gas sensitivity tests [ 71 , 72 ]. At NO 2 concentrations of 50, 30, 10, and 5 ppm, the response values were 23.2%, 21.1%, 19.9%, and 15.2%, respectively.…”

Section: Resultsmentioning

confidence: 96%

Three-Dimensional MoS2/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO2 Gas Sensors

Cheng

Wang

et al. 2022

Nanomaterials

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This study presents three-dimensional (3D) MoS2/reduced graphene oxide (rGO)/graphene quantum dots (GQDs) hybrids with improved gas sensing performance for NO2 sensors. GQDs were introduced to prevent the agglomeration of nanosheets during mixing of rGO and MoS2. The resultant MoS2/rGO/GQDs hybrids exhibit a well-defined 3D nanostructure, with a firm connection among components. The prepared MoS2/rGO/GQDs-based sensor exhibits a response of 23.2% toward 50 ppm NO2 at room temperature. Furthermore, when exposed to NO2 gas with a concentration as low as 5 ppm, the prepared sensor retains a response of 15.2%. Compared with the MoS2/rGO nanocomposites, the addition of GQDs improves the sensitivity to 21.1% and 23.2% when the sensor is exposed to 30 and 50 ppm NO2 gas, respectively. Additionally, the MoS2/rGO/GQDs-based sensor exhibits outstanding repeatability and gas selectivity. When exposed to certain typical interference gases, the MoS2/rGO/GQDs-based sensor has over 10 times higher sensitivity toward NO2 than the other gases. This study indicates that MoS2/rGO/GQDs hybrids are potential candidates for the development of NO2 sensors with excellent gas sensitivity.

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Section: Resultsmentioning

confidence: 96%

Three-Dimensional MoS2/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO2 Gas Sensors

Cheng

Wang

et al. 2022

Nanomaterials

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“…The GO powder was prepared using the modified Hummer method at low, medium and high temperatures, as described in a published article of our research group [34]. At the low temperature stage, place a three-necked flask containing 24 ml of concentrated sulfuric acid in an ice-water bath at 0 °C-5 °C, add 1 g of natural graphite and stir to make it evenly dispersed.…”

Section: Preparation Of Go/tccamentioning

confidence: 99%

“…In this paper, GO was first prepared by a modified Hummer method [34]. Then, the GO/TCCA composite was prepared by loading TCCA into GO using a blending method.…”

Section: Introductionmentioning

confidence: 99%

Preparation and disinfection properties of graphene oxide/trichloroisocyanuric acid disinfectant

Jiang¹,

Xu²,

Yu³

et al. 2021

Nanotechnology

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In this study, graphene oxide (GO) was first prepared by the modified Hummer method. Then, the GO/trichloroisocyanuric acid (TCCA) composite was prepared by loading TCCA into GO with the blending method. X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and atomic force microscopy were used to characterize the composite. The results showed that TCCA was successfully loaded on the surface of GO or intercalated among GO layers. Next, the antibacterial performance of the composite against Escherichia coli and Staphylococcus aureus was tested by the 96-well plate assay. A bactericidal kinetic curve, bacterial inhibition tests, and the mechanism of bacterial inhibition is discussed. The results showed that the minimum inhibitory concentration of the GO/TCCA composite (GO:TCCA ratio = 1:50) was 327.5 µg/mL against E. coli and 655 µg/mL against S. aureus. At the minimum inhibitory concentration, the inhibition rate of the GO/TCCA composite exceeded 99.46% against E. coli and 99.17% against S. aureus. The bactericidal kinetic curves indicate that the GO/TCCA composite has an excellent bactericidal effect against E. coli and S. aureus.

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Chemiresistive Gas Sensing using Graphene‐Metal Oxide Hybrids

Hossain,

Hendi,

Asim

et al. 2023

Chemistry An Asian Journal

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Chemiresistive sensing lies in its ability to provide fast, accurate, and reliable detection of various gases in a cost‐effective and non‐invasive manner. In this context, graphene‐functionalized metal oxides play crucial role in hydrogen gas sensing. However, a cost‐effective, defect‐free, and large production schemes of graphene‐based sensors are required for industrial applications. This review focuses on graphene‐functionalized metal oxide nanostructures designed for gaseous molecules detection, mainly hydrogen gas sensing applications. For the convenience of the reader and to understand the role of graphene‐metal oxide hybrids (GMOH) in gas sensing activities, a brief overview of the properties and synthesis routes of graphene and GMOH have been reported in this paper. Metal oxides play an essential role in the GMOH construct for hydrogen gas sensing. Therefore, various metal oxides‐decorated GMOH constructs are detailed in this review as gas sensing platforms, particularly for hydrogen detection. Finally, specific directions for future research works and challenges ahead in designing highly selective and sensitive hydrogen gas sensors have been highlighted. As illustrated in this review, understanding of the metal oxides‐decorated GMOH constructs is expected to guide ones in developing emerging hybrid nanomaterials that are suitable for hydrogen gas sensing applications.

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Gas sensitivity of heterojunction TiO2NT/GO materials prepared by a simple method with low-concentration acetone

Cited by 14 publications

References 32 publications

Three-Dimensional MoS2/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO2 Gas Sensors

Three-Dimensional MoS2/Reduced Graphene Oxide Nanosheets/Graphene Quantum Dots Hybrids for High-Performance Room-Temperature NO2 Gas Sensors

Preparation and disinfection properties of graphene oxide/trichloroisocyanuric acid disinfectant

Chemiresistive Gas Sensing using Graphene‐Metal Oxide Hybrids

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