Acetone Sensing of ZnO Quantum Dots Embedded in Polyvinyl Alcohol Matrix

Choudhury, Madhuchhanda; Nath, S.; Chakdar, D.; Gope, Gautam; Nath, R.

doi:10.1166/asl.2010.1077

Cited by 13 publications

(5 citation statements)

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“…As one of the important semiconductor materials with a direct wide band gap of 3.37 eV, ZnO has been extensively investigated in the last decade. After they were first used as sensing materials to detect acetone in 1989, ZnO nanocrystals including nanowires, nanorods, and nanoparticles have been used as building blocks in designing and constructing acetone sensors with improved sensing performances. − Recently, it was found that two dimensional (2D) ZnO nanosheets exhibit interesting gas sensing property. ,− ZnO nanowhiskers exposed in (001) facets, for instance, show improved responses for detecting ethanol in comparison to the ZnO nanowires exposed in (100) facets . The composition, nanostructure and surface modification of semiconducting materials can dramatically affect their sensing performances. − Our researches on the design and fabrication of microdevices have also focused on preparation of nanocrystals for tailoring their functionalities. − …”

Section: Introductionmentioning

confidence: 99%

Highly Enhanced Acetone Sensing Performances of Porous and Single Crystalline ZnO Nanosheets: High Percentage of Exposed (100) Facets Working Together with Surface Modification with Pd Nanoparticles

Xiao

Zhang

et al. 2012

ACS Appl. Mater. Interfaces

182

101

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Porous and single crystalline ZnO nanosheets, which were synthesized by annealing hydrozincite Zn(5)(CO(3))(2)(OH)(6) nanoplates produced with a water/ethylene glycol solvothermal method, are used as building blocks to construct functional Pd-ZnO nanoarchitectures together with Pd nanoparticles based on a self-assembly approach. Chemical sensing performances of the ZnO nanosheets were investigated carefully before and after their surface modification with Pd nanoparticles. It was found that the chemical sensors made with porous ZnO nanosheets exhibit high selectivity and quick response for detecting acetone, because of the 2D ZnO nanocrystals exposed in (100) facets at high percentage. The performances of the acetone sensors can be further improved dramatically, after the surfaces of ZnO nanosheets are modified with Pd nanoparticles. Novel acetone sensors with enhanced response, selectivity and stability have been fabricated successfully by using nanoarchitectures consisting of ZnO nanosheets and Pd nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Highly Enhanced Acetone Sensing Performances of Porous and Single Crystalline ZnO Nanosheets: High Percentage of Exposed (100) Facets Working Together with Surface Modification with Pd Nanoparticles

Xiao

Zhang

et al. 2012

ACS Appl. Mater. Interfaces

182

101

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“…The high sensitivity of the fabricated NPs/GCE can be attributed to the excellent absorption (porous surfaces in NPs/binder/GCE) and adsorption ability, high catalyticdecomposition activity, and good biocompatibility of the NPs. The estimated sensitivity of the fabricated sensor is relatively higher and detection limit is comparatively lower than previously reported methanol sensors, based on other nano-composite or nano-materials modified electrodes [29][30][31][32][33][34]. Due to high specific surface area, the NPs provide a favorable micro-environment for the analyte detection with large quantity.…”

Section: Detection Of Methanol By I-v Techniquementioning

confidence: 86%

Highly sensitive methanol chemical sensor based on undoped silver oxide nanoparticles prepared by a solution method

et al. 2012

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We have prepared silver oxide nanoparticles (NPs) by a simple solution method using reducing agents in alkaline medium. The resulting NPs were characterized by UV-vis and FT-IR spectroscopy, X-ray powder diffraction, and field-emission scanning electron microscopy. They were deposited on a glassy carbon electrode to give a sensor with a fast response towards methanol in liquid phase. The sensor also displays good sensitivity and long-term stability, and enhanced electrochemical response. The calibration plot is linear (r 2 00.8294) over the 0.12 mM to 0.12 M methanol concentration range. The sensitivity is 2.65 μAcm −2 mM −1 , and the detection limit is 36.0 μM (at a SNR of 3). We also discuss possible future prospective uses of this metal oxide semiconductor nanomaterial in terms of chemical sensing.

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“…[277] demonstrated the production of water-soluble carbon quantum dots (CQDs) by carbonizing rise straw biomass as a source of carbon. The as-prepared CQDs were highly luminescent, stable, and in the form of a black powder [278,279]. These CQDs synthesized in the water phase were highly specific for the bacterial cell membrane.…”

Section: Microwave Hydrothermalmentioning

confidence: 99%

Synthetic Approach to Rice Waste-Derived Carbon-Based Nanomaterials and Their Applications

et al. 2021

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The utilization of biomass waste to produce valuable products has extraordinary advantages as far as both the economy and climate are concerned, which have become particularly significant lately. The large-scale manufacturing of agricultural waste, mainly rice by-products (rice husk, rice straw, and rice bran), empowers them to be the most broadly examined biomasses as they contain lignin, cellulose, and hemicellulose. Rice waste was first used to incorporate bulk materials, while the manufacturing of versatile nanostructures from rice waste at low cost has been developed in recent years and attracts much consideration nowadays. Carbon-based nanomaterials including graphene, carbon nanotubes, carbon dots, fullerenes, and carbon nanofibers have tremendous potential in climate and energy-related applications. Various methods have been reported to synthesize high-value carbon nanomaterials, but the use of green technology for the synthesis of carbon nanomaterials is most common nowadays because of the abundant availability of the starting precursor, non-toxicity, low fabrication cost, ease of modification, and eco-friendly nature; therefore, reusing low-value biomass waste for the processing of renewable materials to fabricate high-value products is remarkable. Carbon nanomaterials derived from rice waste have broad applications in various disciplines owing to their distinctive physicochemical, electrical, optical, mechanical, thermal, and enhanced biocompatibility properties. The main objective of this review and basic criteria of selecting examples and explanations is to highlight the green routes for the synthesis of carbon nanomaterials—i.e., graphene, carbon nanotubes, and carbon dots—from rice biomass waste, and their extensive applications in biomedical research (bio-imaging), environmental (water remediation), and energy-related (electrodes for supercapacitors, Li-ion battery, fuel cells, and solar cells) applications. This review summarizes recent advancements, challenges, and trends for rice waste obtained from renewable resources for utilization in the fabrication of versatile carbon-based nanomaterials.

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Acetone Sensing of ZnO Quantum Dots Embedded in Polyvinyl Alcohol Matrix

Cited by 13 publications

References 0 publications

Highly Enhanced Acetone Sensing Performances of Porous and Single Crystalline ZnO Nanosheets: High Percentage of Exposed (100) Facets Working Together with Surface Modification with Pd Nanoparticles

Highly Enhanced Acetone Sensing Performances of Porous and Single Crystalline ZnO Nanosheets: High Percentage of Exposed (100) Facets Working Together with Surface Modification with Pd Nanoparticles

Highly sensitive methanol chemical sensor based on undoped silver oxide nanoparticles prepared by a solution method

Synthetic Approach to Rice Waste-Derived Carbon-Based Nanomaterials and Their Applications

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