Qixuan Qin

State Key Laboratory on Integrated Optoelectronics

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Weiyi Bu

Jilin University

Zhijie Zhou

Hong Kong University of Science and Technology

Changhua Hu

PLA Rocket Force University of Engineering

Xiaohong Chuai

Jilin University

Yan Zhang

University of Chinese Academy of Sciences

Yuliang Li

Beihang University

Peng Sun

State Key Laboratory on Integrated Optoelectronics

Yizhuo Fan

Jilin University

Chuan Chen

State Grid Corporation of China (China)

Shengping Ruan

Jilin University

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Jilin University

State Key Laboratory on Integrated Optoelectronics

Jilin Medical University

Chinese Academy of Sciences

Jilin International Studies University

State Council of the People's Republic of China

Beihang University

Xi'an High Tech University

University of Chinese Academy of Sciences

Xi'an Jiaotong University

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Au-Decorated Zno/Znfe2o4 Yolk-Shell Microspheres with Excellent Gas Sensing Properties to Acetone

SSRN Electronic Journal (2022)

Qixuan Qin

Au-ZnO/ZnFe2O4 microspheres were synthesized by three processes. Firstly, ZnFe2O4 microspheres were synthesized through a facile one-step hydrothermal process combined with annealing treatment. Then, a thin layer of ZnO flocs was grown on the surface of ZnFe2O4 microspheres via a similar hydrothermal process to obtain ZnO/ZnFe2O 4 composite materials. Finally, Au nanoparticles were decorated on the surface of ZnO/ZnFe2O4 microspheres via a co-precipitation method. According to the results of scanning electron microscopy analyses, the synthesized Au-ZnO/ZnFe2 O4 microspheres were assembled by numerous nanosheets. And transmission electron microscopy analyses revealed that Au-ZnO/ZnFe2O4 microsphere had a yolk-shell structure. We investigated the gas sensing properties of ZnFe2O4 , ZnO/ZnFe2O4 , and Au-ZnO/ZnFe2O4 based sensors aimed at several VOCs and the results showed that Au-ZnO/ZnFe2 O4 had the highest response (18.18) to 100 ppm acetone. Besides, the optimum operating temperature of Au-ZnO/ZnFe 2O4 decreased from 279 to 206 °C compared with ZnFe2O4 . The Au-ZnO/ZnFe2O4 yolk-shell microspheres exhibited a fast response and recovery time (4 and 23 s, respectively). The reason for the significantly enhanced response of Au-ZnO/ZnFe2O4 based sensor could be attributed to the high specific surface area, the n-n heterojunction structure, and catalytic effect of Au nanoparticles.

10.2139/ssrn.4039473

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Au-Decorated Zno/Znfe2o4 Yolk-Shell Microspheres with Excellent Gas Sensing Properties to Acetone

SSRN Electronic Journal (2022)

Qixuan Qin Asu Li Yizhuo Fan Xin dong Zhang

Au-ZnO/ZnFe2O4 microspheres were synthesized by three processes. Firstly, ZnFe2O4 microspheres were synthesized through a facile one-step hydrothermal process combined with annealing treatment. Then, a thin layer of ZnO flocs was grown on the surface of ZnFe2O4 microspheres via a similar hydrothermal process to obtain ZnO/ZnFe2O4 composite materials. Finally, Au nanoparticles were decorated on the surface of ZnO/ZnFe2O4 microspheres via a co-precipitation method. According to the results of scanning electron microscopy analyses, the synthesized Au-ZnO/ZnFe2O4 microspheres were assembled by numerous nanosheets. And transmission electron microscopy analyses revealed that Au-ZnO/ZnFe2O4 microsphere had a yolk-shell structure. We investigated the gas sensing properties of ZnFe2O4 , ZnO/ZnFe2O4 , and Au-ZnO/ZnFe2O4 based sensors aimed at several VOCs and the results showed that Au-ZnO/ZnFe2O4 had the highest response (18.18) to 100 ppm acetone. Besides, the optimum operating temperature of Au-ZnO/ZnFe2O4 decreased from 279 to 206 °C compared with ZnFe2 O4 . The Au-ZnO/ZnFe2O4 yolk-shell microspheres exhibited a fast response and recovery time (4 and 23 s, respectively). The reason for the significantly enhanced response of Au-ZnO/ZnFe2O4 based sensor could be attributed to the high specific surface area, the n-n heterojunction structure, and catalytic effect of Au nanoparticles.

10.2139/ssrn.4071659

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Improved gas sensing performance with Pd-doped WO3·H2O nanomaterials for the detection of xylene

Sensors and Actuators B Chemical (2017)

Feng Li Qixuan Qin Nan Zhang Chuan Chen Liang Sun

Nanomaterials

10.1016/j.snb.2017.01.063

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Homojunction between cubic/hexagonal CdS nanocrystal for high and fast response to n-propanol

Sensors and Actuators B Chemical (2022)

Weiyi Bu Yan Zhang Qixuan Qin Yuliang Li Zhijie Zhou

Hexagonal phase

Homojunction

Coprecipitation

Cubic crystal system

10.1016/j.snb.2022.132281

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Citations (19)

Highly selective triethylamine sensing based on SnO/SnO2 nanocomposite synthesized by one-step solvothermal process and sintering

Sensors and Actuators B Chemical (2021)

Lingling Meng Weiyi Bu Yuliang Li Qixuan Qin Zhijie Zhou

Triethylamine

Field emission microscopy

10.1016/j.snb.2021.130018

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Citations (64)

Homojunction between Cubic/Hexagonal CDS Nanocrystal for High and Fast Response to N-Propanol

SSRN Electronic Journal (2022)

Weiyi Bu Yan Zhang Qixuan Qin Yuliang Li Zhijie Zhou

In our work, CdS nanocrystals were simply prepared via coprecipitation method and subsequent annealing process (300, 400, 500°C). X-ray powder diffraction (XRD) and the transmission electron microscope (TEM) etc. methods were used to analyze structure morphologies of the samples. The unannealed CdS nanocrystal is cubic, its phase evolution depends on annealing temperature. At 300°C, its cubic phase was remained. Annealing at 400°C makes small amount of hexagonal phase produced and cubic/hexagonal homojunctions were formed. Thorough phase transition to hexagonal phase was completed at 500°C. The sensing properties based on the synthesized CdS nanocrystals with different phase structures were measured. The CdS-400 based sensor had the highest sensitivity to n-propanol, which was 41 at the optimum temperature of 225°C. The response time was less than 1s and the best selectivity was also obtained. The greatly enhanced gas sensing performance may be attributed to cubic/hexagonal CdS homojunction.

Homojunction

10.2139/ssrn.4062835

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キシレンの検出のためのPdドープWO_3H_2Oナノ材料を用いた改良型ガス検知性能【Powered by NICT】

Sensors and Actuators B Chemical (2017)

Feng Li Qixuan Qin Nan Zhang Chen Chuan Sun Liang

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A ZnO/ZnFe₂O₄ n–n heterojunction and Au loading synergistically improve the sensing performance of acetone

Inorganic Chemistry Frontiers (2022)