SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Renjun Si,Yan Li,Jie Tian,Changshu Tan,Shaofeng Chen,Ming Lei,Xin Guo,Shunping Zhang
Temperature modulation technology has been extensively used in metal oxide semiconductor (MOS) gas sensors, especially based on micro-hotplate sensor structure. The technique not only enhances the selectivity but also increases the sensor’s sensitivity by allowing it to exhibit a highly active surface due to the effect of oxygen accumulation. However, when the MOS sensor is in a state of high surface activity, the corresponding hydroxide formation may occur when exposed to water, negatively affecting the gas sensing performance and stability of the sensor. This study focuses on the stability of SnO 2 and In 2 O 3 gas sensors during storage process after temperature modulation test. The results indicate that SnO 2 exhibits good stability, while In 2 O 3 stability is poor. The mechanism responsible for deactivation was discussed with infrared spectroscopy results. The formation of In(OH) 3 was confirmed by high resolution transmission electron microscope , which further confirmed the above conclusion. These findings suggest that after temperature modulation, the gas sensitive materials stored in an atmospheric environment (20 ℃, 40%−60%RH) would generate hydroxides. When temperature modulation was repeated at (100–400 ℃), Sn(OH) 4 decompose into SnO 2 , thus maintaining stability. In contrast, the decomposition temperature of In(OH) 3 is higher. At 400 ℃, it will not decompose into In 2 O 3 in a short time, which would lead to poor stability.
研究领域:
材料科学
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传感器技术
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2023
·
IF 3.3
Dongping Huang,Peng Yong,Shuifa Shen
The sea urchin-like In 2 O 3 material was successfully synthesized through a simple hydrothermal method . Furthermore, the material underwent surface decoration without adding extra indium ions , resulting in the formation of a thin MIL-68(In) layer on the surface of In 2 O 3 . The obtained In 2 O 3 @MIL-68(In) retains the sea urchin-like morphology while acquiring an additional porous structure. Compared to pure In 2 O 3 , the composite exhibits a significant increase in specific surface area, leading to enhanced gas sensitivity. Notably, it demonstrates exceptional sensitivity towards formaldehyde gas, with a response of 18 at 100 ppm at 300 °C, up to six times more than pure In 2 O 3 . Moreover, In 2 O 3 @MIL-68(In) showcases remarkable selectivity and stability. These findings suggest that surface-modified MOF can enhance gas-sensitive properties.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 15
·2778-2782
·
IF 5.958
Ri Han,Shufang Chang,Xiaoxiang Xu
Au nanocrystal anchored In2O3 hollow nanospheres have been fabricated, which show good activity for N2 photofixation into ammonia. Such peculiar hollow microstructures favor light harvesting and N2 chemosorption, both of which are further strengthened in the presence of Au nanocrystals. Charge separation in In2O3 has also been improved by anchoring Au nanocrystals.
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 22
·14055-14063
·
IF 3.442
Wang Yu-Chong,Sun Zhong-Sen,Wang Su-Zhen,Wang Shu-Ying,Cai Sheng-Xun,Huang Xin-Yu,Li Ke,Chi Zong-Tao,Pan Shu-Di,Xie Wan-Feng
Metal oxide semiconductor sensors based on nanocrystalline In 2 O 3 and its composites are found to be very sensitive in detecting low-concentration (~ 5 ppm) gases such as ozone, nitrogen dioxide, formaldehyde and butane. Here, we successfully obtained fiber-shaped In 2 O 3 crystalline nanofibers via electrospun and calcination routes. The gas sensing properties of the In 2 O 3 nanofibers were studied by exposing them to the acetic acid vapor with different concentrations from 500 ppb to 2000 ppm at the optimum operating temperature (250 °C). The device possesses ultra-high response of 66.7 toward 2000 ppm acetic acid vapor, low response and recovery times of 25 s and 37 s (100 ppm), respectively, and significant selectivity to acetic acid at 100 ppm. In particular, the sensor based on In 2 O 3 nanofibers has very low detection limit and can reach 500 ppb. Therefore, the presented In 2 O 3 nanofiber sensor can be used in practice in acetic acid detection area in the future.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Liangyu Zhai,Xinliang Dai,Gangqiang Zhu,Fei Rao,Siyan Wang,Jiaqi Yang,Lujun Zhu,Xianjin Shi,Yu Huang,Yanmin Jia,Siyaka Mj Zubairu
Modifying metal oxide semiconductor materials is a primary approach to enhance gas sensor performance, and heterojunction is a promising method to address cross-sensitivity issues in gas sensors. Sn 2 O 3 nanoflower-based substrates and In 2 O 3 /Sn 2 O 3 heterojunction structures were successfully synthesized by hydrothermal synthetic method. The gas-sensing performance of the In 2 O 3 /Sn 2 O 3 heterojunction-based gas sensor towards formaldehyde gas was investigated. The gas sensor based on In 2 O 3 /Sn 2 O 3 heterojunction exhibited higher sensitivity to formaldehyde gas compared to pure Sn 2 O 3 gas sensor at the same operating temperature. The response and recovery rates of the sensor were significantly improved as well. In addition, the In 2 O 3 /Sn 2 O 3 gas sensor exhibited lower response to interfering gases compared to its response to formaldehyde gas, thus demonstrating superior selectivity over the pure Sn 2 O 3 sensor. The result provides a research direction for the development of high-performance, highly selective, and rapid response formaldehyde sensors, which has certain reference significance for the advancement of gas sensor technology.
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Lan Yang,Yuanzhi Hong,Enli Liu,Xue Zhang,Longyan Wang,Xue Lin,Junyou Shi
The photocatalytic H 2 production simultaneous with organic pollutant degradation has been received wide attention in resolving the problems of energy crisis and environmental pollution. In this study, for the first time, the Ni 2 P (NIP) nanoparticles are successfully loaded on the surface of In 2 O 3 (INO) nanocubes, and the physical-chemical features of as-formed NIP/INO samples are comprehensively characterized by various technologies. Moreover, the photoreactivities of as-prepared NIP/INO nanocomposites are carefully investigated through the photocatalytic H 2 evolution simultaneous with dye (Rhodamine B, RhB) degradation under simulated sunlight irradiation. It was found that the as-fabricated NIP/INO nanocomposites present the significantly enhanced H 2 production and RhB degradation rates than that of pure INO nanocubes. Consequently, the optimum photocatalytic performance of as-synthesized photocatalyst is loaded by 7 wt% NIP (7-NIP/INO), whose the H 2 evolution and RhB degradation rates are reached at 0.138 μmol h −1 and 16.12%, respectively, which are 10.6-folds and 1.6-folds higher than that of individual INO, even its photoactivity is superior than the 1 wt% Pt decorated INO. The greatly improved photocatalytic performance is due to the NIP as co-catalyst can not only promote the charge carries separation and transfer efficiency, but also provide the abundant reaction active sites. Our work highlights a simple strategy for the preparation of non-noble metal nanocomposites towards the renewable solar-driven photocatalysis applications by combining with earth-abundant Ni-based co-catalyst.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Huishuang Jiang,Yang Qu,Xianfa Zhang,Rui Gao,Xiaoli Cheng,Shan Gao,Lihua Huo,Zolt́an Major,Yingming Xu
As a poisonous and harmful gas, NO 2 , is not only harmful to the environment, but also detrimental to human health. In this work, ionic liquids (1-hexadecyl-3-methylimidazolium chloride [C 16 Mim] Cl) were selected as dopants to prepare flower-like Cl uniform doped In 2 O 3 nanomaterials. The material exhibits excellent sensing performance to NO 2 under UV light because of Cl uniform doped. Compared with the experiment in dark conditions, the response value of the sensor to 5 ppm NO 2 under UV light is approximately two times higher (S = 425.9) and presents a faster recovery rate (69 s). Chlorine doping shifts the valence band of the material upwards, facilitating the photogenerated electron leap under UV illumination. Moreover, the in-situ DRIFT under UV light were employed to verify the interaction between the materials and NO 2 gas in N 2 , air and O 2 atmospheres respectively. It was found that the presence of oxygen in the environment affects the adsorption of NO 2 on the surface of the Cl doped In 2 O 3 material. This work is of great significance to the sensing mechanism investigation of photo-activated NO 2 gas sensors.
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
Sensors and Actuators Reports
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2022
·
IF 0
Shu Yan,Shu-Zhe Zhang,Wan-Feng Xie,Ling-Yun Gai,Hui-Min Yuan,Ding Zhang,He Zhang,Xuhai Liu,Woochul Yang,Zong-Tao Chi
By combining hydrothermal and calcination processes, In 2 O 3 /ZnSnO 3 cubic crystallite composites have been successfully synthesized. The crystal structure and morphology of the as-synthesized In 2 O 3 /ZnSnO 3 have been characterized employing X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and X-Ray photoelectron spectroscopy (XPS). In terms of better gas response, fast response, repeatability, and a lower operating temperature, the In 2 O 3 /ZnSnO 3 cubic crystallites displayed selective sensing performance towards ethanol, specifically, the response is 14.9, and response/recovery times are 45 s and 24 s, respectively, to 100 ppm ethanol at 250 °C. This research reveals that the synthetic In 2 O 3 /ZnSnO 3 cubic crystallite composites exhibit significant ethanol sensing properties due to the synergetic effect between In 2 O 3 and ZnSnO 3 , oxygen vacancies, and high specific surface area, making them a potential material for constructing high-performance ethanol sensors.
研究领域:
材料科学
·
化学传感器
✓ 已验证
产品关联
DOI
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 20
·1-9
·
IF 2.8
Yan Caibo,Su Zhiwei,Zhao Zhuo,Zhou Yanwen
Leveraging the conductivity of In 2 O 3 and the wear resistance and anti-corrosion behaviour of SiO 2 and TiO 2 , In 2 O 3 , In 2 O 3 /SiO 2 and In 2 O 3 /TiO 2 films were prepared via magnetron sputtering to meet the transparency, conductivity, wear resistance and corrosion resistance requirements for external screens of wearable devices. The films exhibited excellent sheet resistance of 13–28 Ω·sq −1 , which fully met the conductivity criteria. Owing to the light interference effect, the average transmittance of the In 2 O 3 film (77%) was higher and lower than those of the In 2 O 3 /TiO 2 (69%) and In 2 O 3 /SiO 2 (83%) films, respectively. After soaking in sweat solutions for 48 h, the In 2 O 3 and In 2 O 3 /SiO 2 films maintained their optical and electrical properties and the In 2 O 3 /TiO 2 film was partially peeled off in the acid solution. The low transmittance and corrosion resistance of the In 2 O 3 /TiO 2 film were due to severe oxygen deficiency in the TiO 2 layer, indicated by the certain amount of Ti 2 O 3 and metal Ti in XPS. The wear failure time of the In 2 O 3 /SiO 2 film (42 h) was greater than those of the In 2 O 3 (30 h) and In 2 O 3 /TiO 2 (24 h) films because of its hard SiO 2 top layer. Based on the ‘parallel sheet resistance principle’, the resistivity of the double-layer films was mainly attributed to the conductive In 2 O 3 layers. The wear and corrosion resistances were ascribed to the top passive transparent layers, in which the SiO 2 layer showed its excellent optical and electrical performance stabilities before and after corrosion and wear resistance functions. With its commonly high transparency and conductivity as well as its high wear and corrosion resistances, the In 2 O 3 /SiO 2 film exhibits application potential for external screens of wearable devices.
研究领域:
材料科学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2024
·Vol. 14
·期 11
·756
·
IF 3.8
Xuekai Shan,Guolin Zhang,Ying Zhang,Shuobo Zhang,Fang Guo,Qi Xu
Selective CO2hydrogenation faces significant technical challenges, although many efforts have been made in this regard. Herein, a Ni-doped In2O3catalyst supported by g-C3N4was prepared using the co-precipitation method, and its composition, morphology, specific surface area, and band gap were characterized using TEM, XPS, BET, XRD, CO2-TPD, H2-TPR, UV-Vis, etc. The catalytic hydrogenation reduction of CO2to produce methanol was tested. Under low-photothermal conditions (1.0 MPa), the hydrogenation of carbon dioxide to methanol is stable, effective, and highly selective, with a spatiotemporal yield of 86.0 gMeOHh−1kgcat−1, which is 30.9% higher than that of Ni-In2O3without g-C3N4loading under the same conditions.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2022
·
IF 2.719
Peng Yong,Sheng Wang,Xu Zhang,Haibo Pan,Shuifa Shen
Shape controlled preparation and doping are important means to improve the gas sensitivity of metal oxide semiconductor materials. In this work, pure and Co-doped In 2 O 3 porous hollow hexagonal cylinders were successfully prepared using metal–organic frameworks (MOFs) MIL-68(In) as self-sacrificial template. The size of the MIL-68(In) hexagonal cylinder is uniform, and the In 2 O 3 obtained after pyrolysis better inherits the shape of the MIL-68(In), but becomes hollow, and the cylinder surfaces are porous. The product has a large specific surface area (46.52 m 2 /g), and the doping of Co significantly increases the oxygen vacancy of the material. The Co-doped sample obtained by pyrolysis at 500℃ has excellent gas sensing performances to ethanol gas, its sensitivity to 100 ppm ethanol gas at 210 ℃ is 14.6, response/recovery time is 21 s and 107 s, and the sensing selectivity to ethanol is also good.
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
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Baoqing Han,Hairong Wang,Wanying Yang,Jiuhong Wang,Xueyong Wei
For advanced fibrosis, isoprene is a typical characteristic marker that could be used to quickly screen the population for chronic liver disease (CLD). To achieve trace detection of isoprene, different mol% Pt-decorated In 2 O 3 and pure In 2 O 3 samples were prepared with the commonly used hydrothermal method . The obtained characterization results show that the prepared Pt-decorated In 2 O 3 (1 mol%) sample had Pt nanoparticles uniformly attached to the surface of porous hierarchical In 2 O 3 nanosheets , and the specific surface area was 62.3 m 2 /g. Subsequently, these sensors based on Pt–In 2 O 3 and pure In 2 O 3 nanomaterials were prepared, and their response characteristics were studied. The results show that the response of 1 mol% Pt–In 2 O 3 to isoprene gas was significantly enhanced, and the optimal working temperature was 200 °C. The response of 1 mol% Pt–In 2 O 3 to 5 ppb and 5 ppm isoprene was approximately 3.2 times and 25.9 times that of pure In 2 O 3 , respectively. Meanwhile, the 1 mol% Pt-modified sample exhibited excellent selectivity for isoprene relative to other biomarkers (carbon monoxide, hydrogen, ethanol, and ammonia). The sensor shows good repeatability and long-term stability. Therefore, the developed 1 mol% Pt-decorated In 2 O 3 was expected to be applied as a gas-sensitive material for breath isoprene, which could be suitable for large-scale CLD rapid breath detection.
研究领域:
材料科学
·
医学诊断
·
传感器技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）