Dawen Zeng

Huazhong University of Science and Technology

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Changsheng Xie

Nanjing University

Xiaoxia Wang

Huazhong University of Science and Technology

Huimin Yang

Huazhong University of Science and Technology

Chaoqi Zhu

Huazhong University of Science and Technology

Qirui Wu

South China Botanical Garden

Tingting Zhou

Guangzhou University

Huiyu Su

Huazhong University of Science and Technology

Huajing Wang

Huazhong University of Science and Technology

Wulin Song

Huazhong University of Science and Technology

Ziyu Qin

China Institute of Daily Chemical Industry

Cooperative Institutions

Huazhong University of Science and Technology

Chinese Academy of Sciences

Wuhan University of Technology

University of Chinese Academy of Sciences

Wuhan National Laboratory for Optoelectronics

Jilin University

Tsinghua University

Wuhan University

Wuhan University of Science and Technology

National University of Singapore

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Laser ablation of Upilex-S polyimide: influence of laser wavelength on chemical structure and composition in both ablated area and halo

Surface and Coatings Technology (2001)

K.C. Yung Dawen Zeng

Laser Ablation

10.1016/s0257-8972(01)01295-6

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Citations (19)

Ce–Ag Active Bimetallic Pairs in Two-Dimensional SnS₂ for Enhancing NO₂ Sensing

ACS Sensors (2024)

Huimin Yang Zhenming Du Yazhou Yang Qirui Wu Chaofan Ma

Developing gas sensors capable of efficiently detecting harmful gases is urgent to protect the human environment. Here, an active Ce–Ag bimetallic pair was innovatively introduced into SnS2, which successfully exhibited excellent NO2 gas sensing performance. 0.8% Ce–SnS2–Ag showed a gas sensing response of 5.18 to 1 ppm of NO2 at a low temperature of 80 °C, with a lower limit of detection as low as 100 ppb. DFT calculations revealed that Ce atoms are substituted into the main lattice of SnS2, which opens up the interlayer spacing and serves as an anchor point to fix the Ag atoms in the interlayer. The Ce–Ag bimetallic pairs successfully modulate the electronic structure of SnS2, which promotes the adsorption and charge transfer between NO2 and Ce–SnS2–Ag and thus achieves such an outstanding gas sensing performance. This work opens an avenue for the rational functional modification of SnS2 with an optimized electronic structure and enhanced gas sensing.

Bimetallic strip

Lattice (music)

10.1021/acssensors.3c01924

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Citations (5)

Facile Solution Process of VO2 Film with Mesh Morphology for Enhanced Thermochromic Performance

Materials (2022)

Yu Zhao Zhe Wang Bin Li Shouqin Tian Gen Tang

The fabrication and applications of VO2 film continue to be of considerable interest due to their good thermochromic performance for smart windows. However, low visible transmittance (Tlum) and solar modulation efficiency (∆Tsol) impede the application of VO2 film, and they are difficult to improve simultaneously. Here, a facile zinc solution process was employed to control the surface structure of dense VO2 film and the processed VO2 film showed enhanced visible transmittance and solar modulation efficiency, which were increased by 7.5% and 9.5%, respectively, compared with unprocessed VO2 film. This process facilitated the growth of layered basic zinc acetate (LBZA) nanosheets to form mesh morphology on the surface of VO2 film, where LBZA nanosheets enhance the visible transmittance as an anti-reflection film. The mesh morphology also strengthened the solar modulation efficiency with small caves between nanosheets by multiplying the times of reflection. By increasing the zinc concentration from 0.05 mol/L to 0.20 mol/L, there were more LBZA nanosheets on the surface of the VO2 film, leading to an increase in the solar/near-infrared modulation efficiency. Therefore, this work revealed the relationship between the solution process, surface structure, and optical properties, and thus can provide a new method to prepare VO2 composite film with desirable performance for applications in smart windows.

Thermochromism

Modulation (music)

Visible spectrum

Reflection

Morphology

10.3390/ma15124129

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Citations (2)

Catalytic Activation of Cobalt Doping Sites in ZIF-71-Coated ZnO Nanorod Arrays for Enhancing Gas-Sensing Performance to Acetone

ACS Applied Materials & Interfaces (2020)

Tingting Zhou Shiyu Chen Xiaoxia Wang Changsheng Xie Dawen Zeng

Developing acetone gas sensors with high sensitivity is crucially important for many applications including nonevasive diagnosis of diabetes. In the present work, cobalt doping is used to catalyze acetone gas-sensing reactions and hence to promote the sensitivity of acetone gas sensors. In order to achieve this, ZIF-71 metal–organic framework (MOF) is synthesized onto ZnO nanorod arrays with various concentrations of Co doping to form composite ZnO@ZIF-71(Co) sensors, which are then evaluated as sensing materials for acetone detection. Such sensors are shown to be sensitive to a trace amount of acetone (50 ppb) and have a massively enhanced response of about 100 times that for the undoped sensor at an optimal Co/Zn ratio and operating temperature. Fourier-transform infrared spectroscopy and temperature-programmed desorption with density functional theory calculations are also made to assist in elucidating the catalytic gas-sensing mechanism for the Co-doped composite sensors ZnO@ZIF-71(Co). It demonstrated that the introduced Co site in ZIF-71(Co) can activate oxygen catalytically and increase active oxygen released to the ZnO surface. Meanwhile, the Co sites also promote the decomposition of acetone. These two steps together affect the catalytic oxidation of gases and finally enhance the sensitivity. This work introduces the catalytic effect of the MOF into the gas-sensing mechanism and provides an idea for broadening the application of MOF catalysis.

Nanorod

Nanomaterials

10.1021/acsami.0c13089

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Citations (60)

XPS investigation of Upilex-S polyimide ablated by 355 nm Nd:YAG laser irradiation

Applied Surface Science (2001)

K.C. Yung Dawen Zeng T.M. Yue

Imide

Laser Ablation

10.1016/s0169-4332(00)00884-9

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Citations (75)

Synthesize and Characterization of Highly Sensitive Pt-Sno2 Nanofibers for Detecting C2h4

Qirui Wu Zhenming Du Chun Zhao Peng Fan Hua Yu

Characterization

10.2139/ssrn.4985714

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Citations (0)

High Response and Selectivity of the SnO₂ Nanobox Gas Sensor for Ethyl Methyl Carbonate Leakage Detection in a Lithium-Ion battery

ACS Sensors (2024)

Huiyu Su Huimin Yang Chaofan Ma Jiahong Tang Chaoqi Zhu

It is well-known that metal-oxide semiconductors (MOS) have significant gas sensing activity and are widely used in harmful gas monitoring in various environments. With the rapid development of new energy vehicles, the monitoring of the gas composition and concentration in LIB has become an effective way to avoid safety problems. However, the study of typical electrolyte solvent detection, such as EMC and DMC detection by the MOS sensor, is still in its infancy. Here, the SnO2 nanoboxes are synthesized by coordination dissolution using cubic Cu2O as the template, and its sensor shows high sensitivity (0.27 to 10 ppb EMC), excellent response (32.46 to 20 ppm EMC), and superior selectivity. Additionally, the sensor possesses fast and clear response to lithium-ion battery (LIB) leakage simulation tests, suggesting that it should be a promising candidate for LIB safety monitors. These sensing performances are attributed to large specific surface area, small grain size, and high size/thickness ratio of nanoboxes. More importantly, DFT calculations confirm the adsorption of EMC on the surface of the SnO2 nanoboxes, and the EMC decomposition processes catalyzed by SnO2 are deduced by in situ FTIR and GC-MS.

Leakage (economics)

10.1021/acssensors.3c02230

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Citations (9)

Room Temperature Ultrasensitive NO₂ Detection by Activating VS₂ Basal Planes in Rare-Earth Nd-Doped VS₂/Carbon Nanofibers

ACS Materials Letters (2024)

Huajing Wang Zhou Cui Rui Xiong Lu Tang Yue Ming

Two-dimensional (2D) transition metal dichalcogenides (TMDs) room temperature (RT) gas sensors are of great value for monitoring leaks of hazardous gases under harsh environments. However, the highly sensitive and rapid detection of TMDs in an energy-efficient state is still a formidable obstacle. This work reports the ultrasensitive NO2 sensor based on rare-earth Nd doped VS2/carbon nanofibers (CNFs) (abbreviated as x%Nd-VS2-C), which exhibits a fast response/recovery and intense response at RT. The impact of the Nd doping amount on the NO2-sensing properties of x%Nd-VS2-C was systematically explored. The active Nd-doping and abundant S vacancies could activate the inert basal planes of VS2 efficiently and increase the active sites of the surface, thereby improving the NO2-sensing performance of the sensor. Additionally, theoretical calculations validate the finding by demonstrating a more negative NO2 adsorption energy of −3.12 eV on the (001) surface of Nd-VS2-C compared to −1.26 eV on pure VS2. The 2% Nd-VS2-C exhibits optimal RT NO2-sensing properties, with a thrilling response/recovery rate (∼17 s/20 s), high sensitivity (∼3.03 to 10 ppm of NO2), favorable selectivity and stability, and low detection limit (18 ppb). The outstanding "'4S'" features make the 2%Nd-VS2-C sensor greatly attractive for precise and ultrasensitive NO2 detection at RT.

Carbon fibers

10.1021/acsmaterialslett.4c00942

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Citations (2)

Ultrasensitive Detection for Lithium-Ion Battery Electrolyte Leakage by Rare-Earth Nd-Doped SnO₂ Nanofibers

ACS Sensors (2023)

Huajing Wang Rui Xiong Zhou Cui Jie Wan Baisheng Sa

The problems of lithium-ion battery (LIB) failure have attracted growing attention since flammable and explosive electrolyte leakage might lead to serious consequences. However, due to the redox-neutral and volatile nature of main electrolyte components, such as dimethyl carbonate (DMC), trace leakages are difficult to detect. Therefore, research on LIB electrolyte sensors is urgent and lacking. Herein, sensors based on rare-earth Nd-doped SnO2 nanofibers are reported for detecting DMC vapor in LIB. The excellent sensitivity (distinct response to 20 ppb DMC), high response (∼38.13–50 ppm DMC), and superior selectivity and stability of 3%Nd-SnO2 suggest that it should be a promising candidate for LIB safety monitors. Meanwhile, it also shows clear and rapid response during the LIB-leakage real-time detection experiment. The doping of Nd endows SnO2 with more oxygen vacancy defects. In addition, the highly active Nd sites greatly enhanced the adsorption energy of DMC on SnO2. All of these features contribute to the improvement of DMC-sensing performances.

Leakage (economics)

10.1021/acssensors.2c02862

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Citations (14)

Two-Dimensional Mesoporous WO₃ Nanosheets for Detection of Dimethyl Trisulfide

IEEE Sensors Journal (2021)

Xiafen Hu Xiang Li Xiaoxia Wang Huayan Zhang Chaoqi Zhu

Two-dimensional (2D) metal oxides semiconductor is considered as an important candidate material in the field of gas sensing. Here, fabrication of 2D ultra-thin mesoporous WO ₃ nanosheets (WO ₃ NS) was demonstrated by hydrothermal method and morphology-inheritance route. The thickness and specific surface area of the as-prepared 2D WO ₃ NS were 5 nm and 57 m ² /g, respectively. It was found that 2D ultrathin mesoporous WO ₃ NS exhibited outstanding enhanced sensing properties for ppb-level C ₂ H ₆ S ₃ detection, which could be ascribed to ultrathin structure and edge effect of mesoporous structure. The response of sensors based on 2D ultrathin WO ₃ NS towards 5 ppb was 1.6, which is very helpful for the identification of biomarkers. In addition, the 2D ultrathin WO ₃ NS show rapid response, and high selectivity to ppb-level C ₂ H ₆ S ₃ .

10.1109/jsen.2021.3113170

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Citations (4)