Enhanced catalytic activity of SnO2 quantum dot films employing atomic ligand-exchange strategy for fast response H2S gas sensors

Song, Zhilong; Xu, Shihong; Liu, Jingyao; Hu, Zhixiang; Gao, Naibo; Zhang, Jianbing; Yi, Fei; Zhang, Guangzu; Jiang, Shenglin; Liu, Huan

doi:10.1016/j.snb.2018.05.122

Cited by 39 publications

(18 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The E g was calculated to be 3.66 eV, with a slight increase compared to 3.6 eV of the bulk SnO 2 material. The E g increase of SnO 2 QDs was also concluded in other works [13,25,35]. However, the evaluated E g was smaller than the ones in the previous reports for QDs with similar sizes.…”

Section: Resultssupporting

confidence: 82%

“…However, these methods relied on complex facilities, or included organic compounds, which may bring potential toxicity to human beings or the environment. For example, SnO 2 QDs were synthesized via a solvothermal route, in which organic reagents of oleic acid, oleylamine, and toluene were used [ 25 , 26 ]. Bathula prepared SnO 2 QDs from the precursor of tin chloride pentahydrate with the aid of hydrazine and ethanol [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation of Tin Oxide Quantum Dots in Aqueous Solution and Applications in Semiconductor Gas Sensors

et al. 2019

View full text Add to dashboard Cite

Tin oxide quantum dots (QDs) were prepared in aqueous solution from the precursor of tin dichloride via a simple process of hydrolysis and oxidation. The average grain size of QDs was 1.9 nm. The hydrothermal treatment was used to control the average grain size, which increased to 2.7 and 4.0 nm when the operating temperatures of 125 and 225 °C were employed, respectively. The X-ray photoelectron spectroscopy (XPS) spectrum and X-ray diffraction analysis (XRD) pattern confirmed a rutile SnO2 system for the QDs. A band gap of 3.66 eV was evaluated from the UV-VIS absorption spectrum. A fluorescence emission peak was observed at a wavelength of 300 nm, and the response was quenched by the high concentration of QDs in the aqueous solution. The current-voltage (I-V) correlation inferred that grain boundaries had the electrical characteristics of the Schottky barrier. The response of the QD thin film to H2 gas revealed its potential application in semiconductor gas sensors.

show abstract

Section: Resultssupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Preparation of Tin Oxide Quantum Dots in Aqueous Solution and Applications in Semiconductor Gas Sensors

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Gas sensors, as sensing components, have been widely used in these fields such as chemical plant explosive detection and toxic gas leakage monitoring. They can monitor the composition and concentration of various toxic or harmful gases qualitatively or quantitatively in real time [2,3,4,5,6]. There are many kinds of gas sensors, for example catalytic combustion gas sensors, electrochemical gas sensors and thermal conductivity gas sensors and so on.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of the Composites of Polyaniline and TiO2 Nanoparticles Using Self-Assembly Method and Their Application in Gas Sensing

et al. 2019

View full text Add to dashboard Cite

The composites of polyaniline and TiO2 nanoparticles with different contents were prepared in the aqueous solution of phosphoric acid, in which the phosphoric acid was selected as the protonic acid to improve the conductivity of polyaniline. In the composites, the TiO2 nanoparticles with the size of about 20 nm were coated by a layer of polyaniline film with a thickness of about 5 nm. Then, the gas sensors were constructed by a liquid–gas interfacial self-assembly method. The gas-sensing properties of the composites-based gas sensors obviously improved after doping with TiO2 nanoparticles, and the sensor response of the composites increased several times to NH3 from 10 ppm to 50 ppm than that of pure polyaniline. Especially when the mass ratio of TiO2 to aniline monomer was 2, it exhibited the best gas response (about 11.2–50 ppm NH3), repeatability and good selectivity to NH3 at room temperature. The p–n junction structure consisting of the polyaniline and TiO2 nanoparticles played an important role in improving gas-sensing properties. This paper will provide a method to improve the gas-sensing properties of polyaniline and optimum doping proportion of TiO2 nanoparticles.

show abstract

“…为了克服这一问题, 吉林大学杨柏教授课题组 [23] 以DDT作为单一溶剂、单一配 , 因此人们开发了一系列表面改性的方法. 目前常用的改性方法有配体交换法 [53,54] 、表面硅烷化法 [55] 、两亲分子封装法 [56,57] 等. 其中, 配体交换法因其操作简单、水合半径小等优点而受到越来越多的关注.…”

Section: 组分调控对多元铜基硫族半导体纳米晶发光性能的影响unclassified

Optical properties of multinary copper chalcogenide semiconductor nanocrystals and their applications in electroluminescent devices

Zhang¹,

Wang²,

Chen³

et al. 2021

Chin. Sci. Bull.

View full text Add to dashboard Cite

Enhanced catalytic activity of SnO2 quantum dot films employing atomic ligand-exchange strategy for fast response H2S gas sensors

Cited by 39 publications

References 38 publications

Preparation of Tin Oxide Quantum Dots in Aqueous Solution and Applications in Semiconductor Gas Sensors

Preparation of Tin Oxide Quantum Dots in Aqueous Solution and Applications in Semiconductor Gas Sensors

Facile Synthesis of the Composites of Polyaniline and TiO2 Nanoparticles Using Self-Assembly Method and Their Application in Gas Sensing

Optical properties of multinary copper chalcogenide semiconductor nanocrystals and their applications in electroluminescent devices

Contact Info

Product

Resources

About