Synthesis of WO3 flower-like hierarchical architectures and their sensing properties

Meng, Dan; Wang, Guosheng; San, Xiaoguang; Song, Yinmin; Shen, Yanbai; Wang, Kangjun; Meng, Fanli

doi:10.1016/j.jallcom.2015.07.142

Cited by 41 publications

(14 citation statements)

References 46 publications

(36 reference statements)

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“…Interaction of H 2 WO 4 crystal planes and HBF 4 can be reason of formation plate morphology of WO 3 . Meng and others [ 94 ] synthesized hierarchical structure using citric acid C 6 H 8 O 7 and found that (–COOH) functional groups affect growth of nanoplate. They concluded [ 93 , 94 ] that uniform platelike morphology is favorable for gas sensing because it has more active sides for absorption of gas molecules.…”

Section: Heterostructured Wo 3 Nanocomposites Fmentioning

confidence: 99%

“…Meng and others [ 94 ] synthesized hierarchical structure using citric acid C 6 H 8 O 7 and found that (–COOH) functional groups affect growth of nanoplate. They concluded [ 93 , 94 ] that uniform platelike morphology is favorable for gas sensing because it has more active sides for absorption of gas molecules. In addition, much work was done on WO 3 crystal growth using fluoroboric acid [ 95 ], polyethylene glycol (PEG) [ 96 ], polyvinyl alcohol (PVA) [ 87 ].…”

Section: Heterostructured Wo 3 Nanocomposites Fmentioning

confidence: 99%

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Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

et al. 2020

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This review focuses on tungsten oxide (WO3) and its nanocomposites as photoactive nanomaterials for photoelectrochemical cell (PEC) applications since it possesses exceptional properties such as photostability, high electron mobility (~12 cm2 V−1 s−1) and a long hole-diffusion length (~150 nm). Although WO3 has demonstrated oxygen-evolution capability in PEC, further increase of its PEC efficiency is limited by high recombination rate of photogenerated electron/hole carriers and slow charge transfer at the liquid–solid interface. To further increase the PEC efficiency of the WO3 photocatalyst, designing WO3 nanocomposites via surface–interface engineering and doping would be a great strategy to enhance the PEC performance via improving charge separation. This review starts with the basic principle of water-splitting and physical chemistry properties of WO3, that extends to various strategies to produce binary/ternary nanocomposites for PEC, particulate photocatalysts, Z-schemes and tandem-cell applications. The effect of PEC crystalline structure and nanomorphologies on efficiency are included. For both binary and ternary WO3 nanocomposite systems, the PEC performance under different conditions—including synthesis approaches, various electrolytes, morphologies and applied bias—are summarized. At the end of the review, a conclusion and outlook section concluded the WO3 photocatalyst-based system with an overview of WO3 and their nanocomposites for photocatalytic applications and provided the readers with potential research directions.

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Section: Heterostructured Wo 3 Nanocomposites Fmentioning

confidence: 99%

Section: Heterostructured Wo 3 Nanocomposites Fmentioning

confidence: 99%

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

et al. 2020

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“…Hierarchical structures may provide more spaces for gas diffusion into the deep place of the sensing film [86][87][88]. For example, Mohammad et al [89] prepared a hierarchical structure based on ZnO nanowire or nanodisk which possessed high surface area to volume ratio and an increased proportion of exposed active planes.…”

Section: Noble Metal Nanoparticle Enhanced Catalytically Sensing Effectmentioning

confidence: 99%

Catalysis-Based Cataluminescent and Conductometric Gas Sensors: Sensing Nanomaterials, Mechanism, Applications and Perspectives

et al. 2016

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Gas environment detection has become more urgent and significant, for both industrial manufacturing and environment monitoring. Gas sensors based on a catalytically-sensing mechanism are one of the most important types of devices for gas detection, and have been of great interest during the past decades. However, even though many efforts have contributed to this area, some great challenges still remain, such as the development of sensitively and selectively sensing catalysts. In this review, two representative catalysis-based gas sensors, cataluminescent and conductometric sensors, the basis of optical and electric signal acquisition, respectively, are summarized comprehensively. The current challenges have been presented. Recent research progress on the working mechanism, sensing nanomaterials, and applications reported by our group and some other researchers have been discussed systematically. The future trends and prospects of the catalysis-based gas sensors have also been presented.

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“…Among the various types of gas sensors, metal oxide semiconductors (MOS) have been regarded as promising candidates for gas‐sensing materials owing to their unique advantages, such as short response time, low cost, controllable preparation, simple integration and good suitability for design of portable instruments . To date, many kinds of n‐type MOS (such as ZnO, Fe 2 O 3 , In 2 O 3 ,, SnO 2 , WO 3 , etc.) and p‐type MOS (such as CuO, NiO and Co 3 O 4 , etc.)…”

Section: Introductionmentioning

confidence: 99%

Metal‐Organic Frameworks‐Derived Porous In₂O₃ Hollow Nanorod for High‐Performance Ethanol Gas Sensor

et al. 2017

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Designing hollow micro/nano structures for gas sensing materials is highly desirable for boosting gas sensing properties and still remains challenging, especially through a simple and economic way. Herein, porous In2O3 hollow nanorod (In2O3‐HNR), which was successfully fabricated by thermal decomposition of an In–MOF (CPP‐3) precursor, was applied as gas sensing materials. The pristine CPP‐3 and obtained In2O3‐HNR were systematically characterized by various techniques, such as XRD, SEM, TEM, TGA‐DTA, XPS, Raman and N2 physisorption. Characterization results indicated that the hexagonal rod‐like shape of original CPP‐3 was maintained after calcination, whereas the surface became rough and concave. In addition, the obtained In2O3‐HNR displayed a hollow interior with porous shell composed by In2O3 nanoparticles (9 nm). Taking advantage of this unique porous nanostructure, In2O3‐HNR exhibited a response as high as 6.2 to 5 ppm ethanol at operating temperature of 200 °C, fast response and recovery (3 and 4 s, respectively), and good selectivity to ethanol. The excellent ethanol‐sensing properties endow this In–MOF templated In2O3‐HNR material with a promising application in practical detection of ethanol gas. This method could be extended to the fabrication of other micro/nano structures with well‐defined morphology and composition for high‐performance gas sensing considering diversity of MOFs family.

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Synthesis of WO3 flower-like hierarchical architectures and their sensing properties

Cited by 41 publications

References 46 publications

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

Catalysis-Based Cataluminescent and Conductometric Gas Sensors: Sensing Nanomaterials, Mechanism, Applications and Perspectives

Metal‐Organic Frameworks‐Derived Porous In₂O₃ Hollow Nanorod for High‐Performance Ethanol Gas Sensor

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Synthesis of WO3 flower-like hierarchical architectures and their sensing properties

Cited by 41 publications

References 46 publications

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

Photoactive Tungsten-Oxide Nanomaterials for Water-Splitting

Catalysis-Based Cataluminescent and Conductometric Gas Sensors: Sensing Nanomaterials, Mechanism, Applications and Perspectives

Metal‐Organic Frameworks‐Derived Porous In2O3 Hollow Nanorod for High‐Performance Ethanol Gas Sensor

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Metal‐Organic Frameworks‐Derived Porous In₂O₃ Hollow Nanorod for High‐Performance Ethanol Gas Sensor