COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Zhidong Jin,Jinbo Zhao,Chuanzhi Chen,Huan Zhou,Nan Xiang,Fei Liu,Lin Liu,Jiurong Liu,Yue Mou,Lili Wu
Constructing heterojunctions in semiconductor-based sensors is a vital method of modulating electronic structures and designing high-performance sensors for toxic gas detection. In this study, F-doped SnS x (F-SnS x ) decorated ZnOHF composites were acquired via a two-step solvothermal method . The experimental results confirmed the establishment of heterojunctions between ZnOHF and F-SnS x . The optimized F-SnS x decorated ZnOHF snowflake-like nanoflowers-based NO 2 sensors exhibited incomparable selectivity along with supreme sensitivity (S = 137–10 ppm NO 2 at 200 ℃), rapid responding/recovering speed (34 s/6 s) and low detection limit (50 ppb). NO 2 sensing mechanism and the influence of humidity interference on NO 2 sensing performances were fully discussed. This work not only evidences the great potential of F-SnS x /ZnOHF snowflake-like nanoflowers for NO 2 recognitions but also paves a feasible routine for advancing NO 2 sensing performances by electronic structure regulations.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2024
·
IF 2
Siyu Xu,Junfeng Lu,Dingfeng Jin,Hongxiao Jin
Tin disulfide (SnS 2 ), is an emerging two-dimensional metal sulfide material with high electronegativity and suitable bandgap, making it a promising candidate for NO 2 sensors. In this study, SnS 2 thin sections with different exposed crystal planes were prepared from two different sulfur sources, and the effects of crystal sections on the growth of SnS 2 and its NO 2 sensing performance were studied. SnS 2 micro sheets with (1 0 1) exposed crystal plane (SnS 2 -M) showed a smaller specific surface area than SnS 2 nano sheets with (1 0 0) exposed crystal plane (SnS 2 -N). However, the crystal structure grown along the (1 0 1) plane direction provides a more favorable pathway for NO 2 molecules, enhancing gas molecule adsorption and desorption, and exhibiting excellent performance in terms of sensitivity, repeatability, and response time. The gas sensing performance is not only influenced by the specific surface area but also significantly differs due to the exposure of different crystal planes. This result provides a certain reference value for the preparation of SnS 2 with different crystal plane orientations for enhanced NO 2 sensing.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Lu Tang,Kechen Zhou,Huiyu Su,Jiahong Tang,Qirui Wu,Lingfei Luo,Xiang Guo,Dawen Zeng
Detecting nitrogen dioxide (NO2) at room temperature (RT) is crucial for advancing environmental monitoring technologies, enabling efficient and practical air quality assessment. Two-dimensional (2D) MXene nanomaterials, recognized for their large specific surface area (SSA), abundant functional groups, and tunable electrical properties, have attracted considerable attention as promising candidates for room temperature gas-sensing applications. However, despite their potential, challenges, such as low gas adsorption efficiency, limited sensitivity, and poor selectivity, hinder their broader application and development, highlighting the need for further research. Here, we introduce a zero-dimensional (0D)/2D heterojunction gas-sensitive structure by synthesizing SnS2 quantum dot (QD)-sensitized Ti3C2Tx MXene nanocomposites via a hydrothermal method. The carefully designed gas sensor exhibits a significantly enhanced response value (RV) of 5.83% for 10 ppm of NO2 and a low detection limit of 500 ppb at RT, achieving an RV that is 5.8 times higher than that of pure Ti3C2Tx. Additionally, the sensor demonstrates high sensitivity (0.76 ppm–1 in the 0.5–5 ppm range), excellent selectivity, and outstanding stability, with a performance degradation of only 3.2% over 4 weeks. The exceptional performance arises from the synergistic effects of the quantum confinement properties of SnS2 QDs and the superior conductivity of Ti3C2Tx, which together provide abundant active sites for gas adsorption and facilitate efficient charge transfer pathways. Furthermore, the formation of the heterojunction modulates the resistance, enhancing room temperature sensing capabilities. The synthesized nanomaterials offer significant potential for advancing the design of heterostructures that integrate 0D QDs with 2D nanomaterials, paving the way for highly efficient NO2 detection at RT. Moreover, maintaining an optimal operating temperature further enhances the accuracy and reliability of real-time NO2 monitoring systems.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Ruitian Yan,Wenjie Zhao,Xiaoyang Duan,Taolin Yu,Weiping Cui,Weidong Quan,Yinsheng Chen,Dan Xu
Recently, MoSe 2 has exhibited limited development in the field of gas sensors owing to its low sensitivity and slow response/recovery. Herein, various noble metals (Pt, Pd, and Ag) were employed to dope the MoSe 2 nanoflower for enhancing its sensing capability to NO 2 . Compared to Ag and Pd modification, the Pt doped-MoSe 2 sensor displayed higher sensitivity, faster response rate, and better selectivity. Moreover, the 2.5 %Pt-MoSe 2 sensor had a large sensitivity of 2.45 to 32 ppm NO 2 , good repeatability, and a low detection limit of 0.1 ppm at 110 °C. The improvement in the gas-sensing response can be attributed to the spillover effect and catalytic sensitization of Pt. Moreover, the first principle calculations for the adsorption energy and density of states have confirmed that the MoSe 2 material can adsorb NO 2 more effectively by Pt doping. The Pt-decorated MoSe 2 material exhibits a promising prospect in the field of NO 2 gas detection.
研究领域:
材料科学
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传感器技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Jianfeng Tan,Weijia Ma,Gaoxiang Meng,Congkui Tian,Yin Wang,Yan Wang,Zhuo Liu
Room temperature (RT) gas sensors have been widely studied because of their low power consumption and easy integration. The low response value and long response/recovery time of gas-sensitive materials have hindered the development of RT gas sensors. In this paper, Bi-doped SnS 2 nanoflowers with high surface area were tailored by a novel hydrothermal method. A fast response/recovery speed of 52/100 s and high response (5.58) were obtained from 3 % Bi doped SnS 2 nanoflower for 1 ppm NO 2 . This work provides a strategy to fabricate RT gas sensors based on layered metal sulfide.
研究领域:
材料科学
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环境监测
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
·
IF 11.3
Shupeng Sun,Xinlei Li,Yanhui Sun,Nan Wang,Baoyu Huang,Xiaogan Li
Tellurium nanotubes (TeNT) heterojunction with Tellurium oxide (TeO 2 ) were prepared by in situ oxidation at elevated temperatures in air. The chemiresistive type NO 2 sensor was then fabricated by depositing the synthesized TeNT/TeO 2 on the integrated gold electrodes. The response of the TeNT/TeO 2 based sensor to 600 ppb NO 2 was 38.8 %, which was about 3.2 times higher than that of the single-phase TeNT based sensor (12.1 %). The response and recovery time are 39 s and 49 s, respectively, which are substantially reduced compared to those of the pristine TeNT based sensor (133 s and 336 s) and the results reported in literature. The sensor also exhibits good stability with a response deviation of less than 2 % for 45 days and a good resistance to environmental disturbances. The improved sensor performance can be attributed to the heterojunction formed between TeNT and TeO 2 . Density Functional Theory (DFT) calculations show that the formed TeNT/TeO 2 heterojunction enhances the adsorption energy (-0.671 eV) and charge transfer (0.49 |e|) between NO 2 and the TeNT/TeO 2 .
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 5
·055041
·
IF 1.449
Yixue Li,Zhongxiao Song,Yanhuai Li,Sha Li,Hairong Wang,Baorui Song,Bo Gao,Xiaoye Du
In the present work, Mo4O11 @MoO3 nanobelts are successfully prepared by a two-step hydrothermal method. The nanobelts are about several micrometers in length and 200–300 nm in width with Mo4O11 nanoparticle on surface. The introduction of nanoparticles act as the adsorption sites which facilitate the adsorption of O2 and NO2 gas molecules, because of the point defects such as Mo5+ ions and oxygen vacancies inducing to increase the concentration of carriers, which synthetically contribute the sensing performance enhancement. The Mo4O11@MoO3 nanobelts show excellent sensing performance with 6 times enhancement with the decreased working temperature comparing with the pure α-MoO3 nanobelts. This study indicate that this kind of sensor show a promising application in NO2 detection.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Xueying Sun,Lina Xie,Wenlong Huo,Kaifeng Lin,Yulin Yang,Xuhui Chi,Chengyuan Zhao,Fengtao Zhang,Junzhuo Li,Debin Xia,Jian Zhang
In this study, an organic molecular probe containing an imine (C=N) linkage was synthesized and embedded in a polymethylmethacrylate (PMMA)/polyethylene glycol (PEG) matrix to fabricate a porous optical film for NO 2 gas detection via solid-state UV spectroscopy. Upon exposure to NO 2 , the film exhibited significant spectral changes, with a detection limit as low as 26.45 ppm. Mechanistic investigations revealed that NO 2 induced non-covalent interactions with the probe, triggering structural reorganization and enhanced π-conjugation. Density Functional Theory (DFT) calculations further supported these findings by confirming changes in electronic structure and energy levels. Additionally, preliminary tests demonstrated the feasibility of applying this probe film for aging detection of NEPE propellants, offering a promising non-destructive approach for monitoring propellant health.
研究领域:
材料科学
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化学
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 13
·1940
·
IF 4.7
Kuo Zhao,Yunbo Shi,Mingrui Cui,Bolun Tang,Canda Zheng,Qinglong Chen,Yuhan Hu
High sensitivity and selectivity and short response and recovery times are important for practical conductive polymer gas sensors. However, poor stability, poor selectivity, and long response times significantly limit the applicability of single-phase conducting polymers, such as polypyrrole (PPy). In this study, PPy/MoS2composite films were prepared via chemical polymerization and mechanical blending, and flexible thin-film resistive NO2sensors consisting of copper heating, fluorene polyester insulating, and PPy/MoS2sensing layers with a silver fork finger electrode were fabricated on a flexible polyimide substrate using a flexible electronic printer. The PPy/MoS2composite films were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, and field-emission scanning electron microscopy. A home-built gas sensing test platform was built to determine the resistance changes in the composite thin-film sensor with temperature and gas concentration. The PPy/MoS2sensor exhibited better sensitivity, selectivity, and stability than a pure PPy sensor. Its response to 50 ppm NO2was 38% at 150 °C, i.e., 26% higher than that of the pure PPy sensor, and its selectivity and stability were also higher. The greater sensitivity was attributed to p–n heterojunction formation after MoS2doping and more gas adsorption sites. Thus, PPy/MoS2composite film sensors have good application prospects.
研究领域:
材料科学
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传感器技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganics
·
2016
·Vol. 4
·期 3
·24
·
IF 0
Fengdong Qu,Bo He,Rohiverth Guarecuco,Minghui Yang
Composite materials, which can optimally use the advantages of different materials, have been studied extensively. Herein, hybrid tungsten nitride and oxide (WN/WO3) composites were prepared through a simple aqueous solution route followed by nitriding in NH3, for application as novel sensing materials. We found that the introduction of WN can improve the electrical properties of the composites, thus improving the gas sensing properties of the composites when compared with bare WO3. The highest sensing response was up to 21.3 for 100 ppb NO2with a fast response time of ~50 s at room temperature, and the low detection limit was 1.28 ppb, which is far below the level that is immediately dangerous to life or health (IDLH) values (NO2: 20 ppm) defined by the U.S. National Institute for Occupational Safety and Health (NIOSH). In addition, the composites successfully lower the optimum temperature of WO3from 300 °C to room temperature, and the composites-based sensor presents good long-term stability for NO2of 100 ppb. Furthermore, a possible sensing mechanism is proposed.Keywords:WN/WO3composite;nanosheets;gas sensor;NO2;room temperature
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Wei Liu,Ding Gu,Xiaogan Li
A novel chemiresistive-type sensor for detecting sub-ppm NO2 has been fabricated using AuPt bimetal-decorated SnSe2 microflowers, which was synthesized by the hydrothermal treatment followed by in situ chemical reduction of the bimetal precursors on the surface of the petals of the microflowers. The as-prepared sensor registers a superior performance in detection of sub-ppm concentration of NO2. Functionalized by the AuPt bimetal, the SnSe2 microflower-based sensor shows a response of approximately 4.62 to 8 ppm NO2 at 130 °C. It is significantly higher than those of the sensors using the pristine SnSe2 (∼2.29) and the modified SnSe2 samples by a single metal, either Au (∼3.03) or Pt (∼3.97). The sensor demonstrates excellent long-term stability, signal repeatability, and selectivity to some typical interfering gaseous species including ammonia, acetone, formaldehyde, ethanol, methanol, benzene, CO2, SO2, and CO. The remarkable improvement of the sensitive characteristics could be induced by the electronic and chemical sensitization and the synergistic effect of the AuPt bimetal. Density functional theory (DFT) is implemented to calculate the adsorption states of NO2 on the sensing materials and thus to possibly reveal the sensing mechanism. The significantly enhanced response of the SnSe2-based sensor decorated with AuPt bimetallic nanoparticles has been found to be possibly caused by the orbital hybridization of O, Au, and Pt atoms leading to the redistribution of electrons, which is beneficial for NO2 molecules to obtain more electrons from the composite material.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
DOI
PubMed
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Zhaorui Zhang,Jinkui Chu,Huashuai Hu,Haoming Sun,Xuefei Zhao,Haiying Du,Minghui Yang
Nitrogen dioxide (NO2) is a significant environmental and human health hazard. Current NO2 sensors often lack sensitivity and selectivity under ambient conditions. This study investigates ammonia pyrolysis modification of monolayer Ti3C2Tx MXene to enhance NO2 detection at room temperature. Nitrogen-doped Ti3C2Tx demonstrates a substantial improvement in sensitivity, with a response of 8.87% to 50 ppm of NO2 compared to 0.65% for the original sensor, representing a 13.8-fold increase. The nitrogen-doped sensor also exhibits superior selectivity and linearity for NO2 under ambient conditions. Theoretical analysis shows that nitrogen incorporation promotes enhanced interaction between Ti3C2Tx and its surface oxygen-containing functional groups through electronic hybridization, resulting in improved adsorption energy (1.80 |eV|) and electron transfer efficiency (0.67 |e|) for NO2, thereby enhancing its gas-sensing performance. This study highlights the potential of ammonia pyrolysis-treated Ti3C2Tx MXene for advancing NO2 sensor technologies with heightened performance at room temperature.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）