Hierarchical three-dimensional MoS2/GO hybrid nanostructures for triethylamine-sensing applications with high sensitivity and selectivity

Hou, Xinghui; Wang, Zhaowu; Fan, Guijun; Ji, Haipeng; Yi, Shasha; Li, Tao; Wang, Yu; Zhang, Zhongtao; Yuan, Lei; Zhang, Rui; Sun, Jing; Chen, Deliang

doi:10.1016/j.snb.2020.128236

Cited by 74 publications

(23 citation statements)

References 69 publications

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“…These vibrations appearing at 1630cm -1 may also indicate adsorbed water molecules and unoxidized graphitic domains (Hou et al, 2020) A very small peak is visible at 947 cm −1 in Mn-doped ternary composite as compared to undoped ternary sample, which is ascribed to Mn-O vibrations as confirmed from previous studies (Ahmad et al, 2019). Besides, the peak intensity is reduced in the doped ternary composite, which supports the successful insertion of dopant ions into the host material.…”

Section: Ftir Analysissupporting

confidence: 77%

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Tahir

Zahid

Bhatti

et al. 2021

Environ Sci Pollut Res

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The increase in environmental pollution has led to an increased investigation in the development of novel ternary photocatalytic systems for remediation. These Photocatalytic systems exhibit superior photocatalytic action for the removal of pollutants because of their visible light active bandgaps. A highly effective visible light active ternary heterojunction was fabricated using a hydrothermal method assisted by ultrasonication. Herein, we report the Insitu hydrothermal synthesis of Mn-doped Bi2WO6-GO/ MoS2 photocatalyst, efficiently exhibiting greater photocatalytic activity for the wastewater treatment under solar light. The binary metal sulphide (MoS2) used as a co-catalyst, acted as electron collector and Graphene oxide (GO) as a support material for interfacial electron transfer to and from bismuth tungstate and MoS2. The as-prepared samples were characterized using SEM-EDX, FT-IR, XRD, XPS, and UV-Vis techniques. The bandgap of the novel photocatalyst was found in the visible region (2.2 eV) which helped in suppressing photoinduced electron-hole pairs recombination. The ternary Mn-BMG showed 99% methylene blue removal after 60 minutes of sunlight irradiation at the optimum conditions of pH 8, catalyst dose 50 mg/100ml and initial MB concentration of 10ppm under sunlight irradiation. The Mn-BMG has proved to be an effective sunlight active photocatalyst that can be reused without substantial loss in photocatalytic efficiency.

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Section: Ftir Analysissupporting

confidence: 77%

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Tahir

Zahid

Bhatti

et al. 2021

Environ Sci Pollut Res

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“…The C=C stretching vibration of the GQDs can also be observed at 1579 cm −1 in the MoS 2 /rGO/GQD hybrids, which indicates the existence of GQDs in the composite materials. The common peaks at 1401 and 662 cm −1 in the MoS 2 /rGO and MoS 2 /rGO/GQD hybrids are related to the C–S and Mo–S bonds, which confirms the presence of MoS 2 [ 61 ]. It is noteworthy that the characteristic peaks associated with oxygenated groups, such as O–H, C=O, and C–O groups, were not clearly observed in the MoS 2 /rGO nanocomposites, which verifies that GO was successfully reduced via the hydrothermal approach [ 62 ].…”

Section: Resultsmentioning

confidence: 90%

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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“…Resulting nanohybrid displayed outstanding electrical conductivity as well as magnetic properties. Similarly, chalcogenide quantum dots, for example, CdS [121], ZnS [122], Cu 2 S [123], and MoS 2 [124], etc. have been successfully immobilized on graphene oxide exploiting hydrothermal methods.…”

Section: Hydrothermal Methodsmentioning

confidence: 99%

Graphene Oxide-Based Nanohybrids as Pesticide Biosensors: Latest Developments

Mogha¹

2020

Nanotechnology and the Environment

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Graphene is the most significant two-dimensional nanomaterial with sp 2 hybridized carbon atoms in a honeycomb arrangement with an extremely high surface area, excellent electrical properties, high mechanical strength, and advantageous optical properties and is relatively easy to functionalize and mass produce. Various inorganic nanoparticles incorporated with graphene, such as gold, silver, and palladium nanoparticles are brought into sharp focus due to their catalytic, optical, electronic, and quantized charging/discharging properties. Graphene oxide-based nanohybrids are particularly well suited for biosensing applications and catalysis. Consequently, this area of research has grown to represent one of the largest classes within the scope of materials science and is rapidly becoming a key area in nanoscience and nanotechnology offering significant potential in the development of advanced materials in multiple and diverse applications. Here in this present chapter, synthesis, characterization of graphene oxide, and their nanohybrids are discussed thoroughly with their application in the field of pesticide biosensors. This chapter will help in a further understanding of graphene-based nanohybrids as a biosensing platform for their future applications in a sustainable environment.

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Hierarchical three-dimensional MoS2/GO hybrid nanostructures for triethylamine-sensing applications with high sensitivity and selectivity

Cited by 74 publications

References 69 publications

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

Fabrication of visible light active Mn-doped Bi2WO6-GO/MoS2 heterostructure for enhanced photocatalytic degradation of methylene blue

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

Graphene Oxide-Based Nanohybrids as Pesticide Biosensors: Latest Developments

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