IEEE SENSORS JOURNAL
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2024
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IF 4.3
Cuixian Luo,Yimeng Dong,Yongjiao Sun,Yurong Huang,Lingrong Xue,Lifang Ren,Daming Wang,Minzhe Qin,Xinke Li
Tungsten disulfide (WS2) is emerging with dazzling visibility as a “layered material beyond graphene and molybdenum disulfide” due to its exquisite tunable electronic, surface structure, high carrier mobility, and physicochemical stability. In this article, In2O3 and Au nanoparticles (NPs) co-modified WS2 microsheets were prepared for detecting NO2 at room temperature (RT). The In2O3 and Au NPs were anchored on the surface of WS2 microsheets, which could be observed by the characterization. The NO2 sensing performance at RT was optimized by adjusting the contents of In2O3 and Au NPs. The proposed gas sensor based on Au1WIn6 (WS2 microsheets co-modified with 6 wt% In2O3 and 1 wt% Au NPs) showed the highest response (46.91 to 50 ppm NO2), limit of detection (LOD; 18.9 ppb), excellent linearity within the test range, and good stability under various relative humidity (RH), bending degrees, and bending times. The excellent result is attributed to the formation of a heterojunction, which increases the number of ionized oxygen adsorption sites and facilitates the reaction between NO2 gas and Au1WIn6. Therefore, it is believed that decorating WS2 microsheets with metal oxide and noble metal NPs is a promising strategy to improve the NO2 sensing property at RT.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Jianwang He,Hu Meng,Yan Xu,Liang Feng
NO 2 is one of the most important air pollutant gases for the environment and human health. H 2 is seen as the next generation of clean energy to promote sustainable development. However, sensitive detection of NO 2 at room temperature is still a major challenge, and reliable H 2 sensors are also scarce. Metal oxide semiconductor (MOS) gas sensors are advantageous for detecting gas. Hence, we synthesized the unique hexahedral hollow mesoporous In 2 O 3 (h-In 2 O 3 ) derived from MIL-68 (In). The formation process and properties of h-In 2 O 3 were analyzed. The surface of h-In 2 O 3 is rich in hydroxyl groups , which are active sites for NO 2 adsorption at room temperature. Increasing working temperature up to 160 °C enables effective sensing reaction with H 2 . Based on different temperature-dependent gas sensing mechanisms, the h-In 2 O 3 sensor exhibits ultrasensitive response values of 400 towards 100 ppb NO 2 at room temperature (24 °C) and of 17.99 towards 10 ppm H 2 at 160 °C. In addition, the h-In 2 O 3 sensor exhibits reliable linear response, low theoretical detection limit of 1.8 ppt and 23 ppb for NO 2 and H 2 , excellent selectivity, repeatability and long-term stability. The synergistic effect of the unique structure, larger specific surface area , and abundant adsorbed oxygen plus oxygen vacancy contribute to the excellent gas sensing performance of the h-In 2 O 3 sensor. This study provides a promising strategy for the development of bifunctional gas sensors.
研究领域:
材料科学
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环境科学
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传感器技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2016
·Vol. 28
·期 1
·958-962
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IF 1.798
Wang Han,Li Haiying,Li Shouchun,Liu Li,Wang Lianyuan,Guo Xuexin
Biomorphic In 2 O 3 –ZnO hollow microtubules were synthesized by using cotton as template and followed by calcination. This environmental-friendly method using biomaterials as templates can be used to synthesize metal oxide semiconductor materials with specific morphologies. The structural and microscopy characterization were carried out with X-ray diffraction, scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy. The SEM images display the porous structure of the as-obtained hollow microtubules, which is beneficial to increase gas sensing properties of materials. Gas sensors based on In 2 O 3 -doped ZnO hollow microtubules were investigated and the test results demonstrate the excellent acetone sensing properties of such porous materials. The response of In 2 O 3 –ZnO hollow microtubule sensors to 100 ppm acetone at the optimum temperature of 300 °C is 62.5, meanwhile the response and recovery times are 3 and 7 s, respectively. Moreover, even at 0.1 ppm of acetone detectable response can be observed, and the value is 2.82. At the same time the sensors have selectivity to acetone.
研究领域:
材料科学
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环境科学
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传感器技术
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2022
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IF 5.518
Tianle Shi,Yong Men,Shuang Liu,Jinguo Wang,Zhuping Li,Keye Qin,Dandan Tian,Wei An,Xiaoli Pan,Lin Li
Hydrogenation of CO 2 to methanol is an achievable way for “methanol economy” and “liquid sunshine” visions. Owing to highly tunable properties containing different morphologies, exposed crystal facets and oxygen vacancies , In 2 O 3 has become a promising material for CO 2 hydrogenation. Here we successfully introduced highly dispersed Pt 2+ species into three different morphologies In 2 O 3 supports by controllable precipitation method. The dominant exposed crystal facets of In 2 O 3 supports during the research are discovered to greatly affect the dispersion of active Pt 2+ species and the number of oxygen vacancies, as analyzed by diverse characterization techniques, and closely correlated with the catalytic performance. Compared with Pt/In 2 O 3 whcih mainly exposing (222) or (104) facet, Pt/In 2 O 3 which primarily exposed (211) facet obtained higher catalytic activity, including a CO 2 conversion of 11.7% and methanol selectivity of 74.8% with a space time yield of methanol of 0.63 g MeOH h −1 gcat −1 at 300 °C, 5 MPa, and 21,000 cm 3 h −1 g −1 . The highly enhanced activity of 1.5Pt/C-In 2 O 3 -S catalyst was ascribed to its more abundant oxygen vacancies and well-dispersed Pt 2+ species, which derived from the interaction between Pt 2+ and the underlying In 2 O 3 (211) facet. The special interface structure enabled the activation of CO 2 and hydrogenation of key intermediates effectively. Exposing the highly active crystal face of the In 2 O 3 supports is proved to be an effective strategy to enhance catalytic performance of Pt/In 2 O 3 catalyst for methanol synthesis .
研究领域:
催化化学
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材料科学
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能源化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2018
·Vol. 29
·期 20
·17533-17541
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IF 2.324
Zeng Xiangan,Wang Zhijun,Li Yu,Li Haiying,Xu Suyang,Liu Li,Gong Yimin,Liang Qingcheng,Duan Haojie,Cheng Yali,Du Liting
Pure In 2 O 3 nanowires (PINW) and CdO–In 2 O 3 composited beaded porous nanotubes (CIBPNT) were successfully prepared by conventional electrospinning method and followed by calcination. The peculiar surface morphological images of as-synthesized nanomaterials were observed via scanning electron microscope (SEM) and transmission electron microscopy (TEM) from which we could observe a series of irregular holes distributed on the surface of beaded nanotubes. The inner structure of the samples was investigated using X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results reveal that the element composition of the samples are in conformity with the CdO–In 2 O 3 materials. In addition, the average crystallite size of CIBPNT (17.5 nm) can be estimated from XRD which accords with the TEM images, and XPS analysis supports the oxygen vacancy principle by proving the oxygen vacancies concentration of CIBPNT is more than in PINW. The formaldehyde sensing performances of the samples were evaluated at different temperatures. The result shows that the sensor based on CIBPNT exhibits a excellent response (72–50 ppm formaldehyde) at a low operation temperature of 132 °C, and the value is eight times that of the response of PINW (9 to 50 ppm formaldehyde).The sensor based on CIBPNT could detect 0.1 ppm formaldehyde with a response of 2. In addition, good selectivity and a short response and recovery time (6 s, 12 s) are exhibited. The enhancement of gas sensitivity is attributed to not only the unique beaded shape of hollow and porous 1D nanostructures, but also the high catalytic activity of the CdO additive.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Hongjie Liu,Jiarong Xv,Liwei Wang,Yixin Qian,Hao Fu,Minxuan Huang,Xiyong Chen
Constructing core-shell heterostructures can effectively improve the hindered issues such as decreased sensitivity and poor selectivity from the chemoresistive gas sensors in the complex atmosphere. Herein, an effective hydrothermal-water bath treatment combined strategy was designed to obtain the unique ethanol adsorption preferred ZnIn 2 S 4 sheet shell/In 2 O 3 sphere core (ZnIn 2 S 4 @In 2 O 3 ) nanosphere (NS) heterostructures. Particularly, according to the characterization and gas sensing test results, the chemoresistive sensor of ZnIn 2 S 4 @In 2 O 3 NS-2 with the highest chemisorbed oxygen concentration shows satisfactory selectivity to ethanol vapor, and the response is the highest (54) compared to other composite controls, which is almost 4-fold of that of the pure In 2 O 3 NS reference. Besides, the relatively lower working temperature (220 °C), low limit of detection (LOD, 30 ppb) and long-term stability were also obtained. The enhanced performance of the core-shell ZnIn 2 S 4 @In 2 O 3 NS-2 based sensor may be due to the synergistic effect between ZnIn 2 S 4 sheets and In 2 O 3 sphere moieties. Meanwhile, the large specific surface area from the outer shell of ZnIn 2 S 4 sheets is also another contribution factor, which supplies the most chemisorbed oxygen sites and transportation channels to promote the interfacial gas diffusion, catalytic oxidation and product desorption.
研究领域:
材料科学
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化学传感
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纳米技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Xiaoli Zhao,Ming Huang,Bangwei Deng,Kanglu Li,Fei Li,Fan Dong
Electrocatalytic reduction of CO 2 into value-added chemicals and fuels is of intensive urgence and importance to relieve the growing CO 2 emission and achieve the carbon neutrality. Herein, an In 2 O 3 /InN heterojunction was constructed and firstly utilized in electrocatalytic CO 2 reduction reaction (CO 2 RR) to formate with high Faradaic efficiency (95.7% at −1.48 V vs. RHE) and outstanding stability. The in-depth experimental analyses together with theoretical studies reveal that the O-N interaction at the interface between In 2 O 3 and InN could provide a charge transfer channel and lead to electron enrichment on the surface of InN, promoting the activation of CO 2 molecules, lowering the Gibbs free energy for the formation of *HCOO intermediate and strengthening the binding with *HCOO during CO 2 RR. This work provides a fundamental understanding of the interaction at In-based heterostructure interface for highly selective CO 2 reduction to formate and offers a universal route for the design of other type metal oxide/nitride heterostructures for various catalytic applications.
研究领域:
材料科学
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电催化
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能源转换
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Yiling Wu,Kaiji Xu,Jian Tian,Longmei Shang,Kok Bing Tan,Hao Sun,Kang Sun,Xiaoping Rao,Guowu Zhan
The efficient and economic conversion of CO2 and renewable H2 into methanol has received intensive attention due to growing concern for anthropogenic CO2 emissions, particularly from fossil fuel combustion. Herein, we have developed a novel method for preparing Ni/In2O3 nanocatalysts by using porous MIL-68(In) and nickel(II) acetylacetonate (Ni(acac)2) as the dual precursors of In2O3 and Ni components, respectively. Combined with in-depth characterization analysis, it was revealed that the utilization of MIL-68(In) as precursors favored the good distribution of Ni nanoparticles (∼6.2 nm) on the porous In2O3 support and inhibited the metal sintering at high temperatures. The varied catalyst fabrication parameters were explored, indicating that the designed Ni/In2O3 catalyst (Ni content of 5 wt %) exhibited better catalytic performance than the compared catalyst prepared using In(OH)3 as a precursor of In2O3. The obtained Ni/In2O3 catalyst also showed excellent durability in long-term tests (120 h). However, a high Ni loading (31 wt %) would result in the formation of the Ni-In alloy phase during the CO2 hydrogenation which favored CO formation with selectivity as high as 69%. This phenomenon is more obvious if Ni and In2O3 had a strong interaction, depending on the catalyst fabrication methods. In addition, with the aid of in situ diffuse reflectance infrared Fourier transform spectroscopy and density functional theory (DFT) calculations, the Ni/In2O3 catalyst predominantly follows the formate pathway in the CO2 hydrogenation to methanol, with HCOO* and *H3CO as the major intermediates, while the small size of Ni particles is beneficial to the formation of formate species based on DFT calculation. This study suggests that the Ni/In2O3 nanocatalyst fabricated using metal–organic frameworks as precursors can effectively promote CO2 thermal hydrogenation to methanol.
研究领域:
催化化学
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材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Qihua Liang,Guotao Lin,Junting Gao,Zequan Li,Qingge Feng
Formaldehyde is a ubiquitous indoor pollutant. Developing metal oxide semiconductors gas sensors for selective ppb-level formaldehyde detection is challenging. Therefore, developing gas sensors that can selectively detect indoor formaldehyde at ppb levels is important. In this study, outer-walled thin sheet-like microspheres of Ga-doped In 2 O 3 (Ga x In 2-x O 3 , x = 0, 0.1, 0.2, 0.3, and 0.4) were fabricated using a facile two-step synthetic method. The Ga 0.3 In 1.7 O 3 based sensor shows the response (556 ± 25) to 100 ppm formaldehyde at 80 °C, which is around 6.5 times that of the pure In 2 O 3 based sensor at 90 °C. Furthermore, it has fast response time (< 3 s), excellent selectivity (S Formaldehyde /S Ethanol = 160, S Formaldehyde /S Acetone = 267), good stability (at least 60 days), and ultra-low limit of detection (10 ppb) for formaldehyde at 80 °C. The improved formaldehyde sensing performance of Ga 0.3 In 1.7 O 3 microspheres is attributed to the optimization of surface chemisorbed oxygen, which is caused by Ga doping regulating the Fermi level of In 2 O 3 as well as an increase in the specific surface area.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Xiaoyu Chen,Zhuo Liu,Shuang Li,Yue Sun,Yuchi Zhang,Yan Xu
Extraordinary behavior of semiconductor metal oxide-based gas sensors is broadly applied in gas supervision, but they usually suffer from high operating temperature , gas cross-sensitivities and response fluctuations, limiting their use in expanding applications. Herein, hierarchical In 2 O 3 /ZnO micro-flower with in-plane folded shells heterostructure was successfully prepared through simple glycerol-assisted solvothermal method followed by a subsequent pyrolysis treatment. The optimized In 2 O 3 /ZnO-0.5 heterostructure with specific In/Zn molar ratio exhibits excellent triethylamine (TEA) sensing capability at 200 ℃, including a high response of 34.87 towards 100 ppm TEA, superb gas selectivity , fast response and recovery time (62 s/33 s) and prolonged cyclic stability, ascribing to the well assembly of the unique In 2 O 3 /ZnO n-n heterojunction with plentiful reactive sites, which markedly promote the absorption of TEA and the surface gas sensitive reaction with oxygen species at the close contacted interface between In 2 O 3 and ZnO. This work demonstrates a stable method for feasible manufacturing of In 2 O 3 /ZnO heterostructure with intriguing multi-level micro-nanostructure for highly sensitive TEA gas sensing application.
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
CATALYSIS TODAY
·
2025
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IF 5.3
Biao Gao,Wenbo Gao,Longtai Li,Tatsumi Ishihara,Limin Guo
The In 2 O 3 -ZrO 2 solid solution catalyst has emerged as a versatile catalytic support for CO 2 hydrogenation to methanol, enabling noble metal-based systems (e.g., Pt, Ir) to achieve improved methanol selectivity. Building on this foundation, we introduce cobalt into the In 2 O 3 -ZrO 2 matrix, creating a novel Co/In 2 O 3 -ZrO 2 composite catalyst that synergistically integrates transition metal functionality with oxide engineering. The optimized catalyst achieves a methanol space-time yield of 0.80 g MeOH ·gcat −1 ·h −1 at a 5.0 MPa, H 2 /CO 2 = 3:1, 320 °C, GHSV = 48,000 cm 3 · g cat − 1 · h −1 , surpassing reported In 2 O 3 -ZrO 2 and Co/In 2 O 3 benchmarks. Mechanistic studies reveal that methanol synthesis follows the formate pathway, where ZrO 2 amplifies oxygen vacancy density to improve CO 2 adsorption and weakens CO adsorption through electronic modulation.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Sarula Li,Zheyan Hu,Tianqi Wang,Fang Song,Hong Shao,Feng Li,Xiangting Dong
Triethylamine (TEA) gas is a kind of toxic gas that can lead to health problems. In this work, a novel Janus structure nanofibers (NFs) have been synthesized via a parallel electrospinning method. SnO 2 and In 2 O 3 are selected as the components of the Janus structure and different ratios of SnO 2 and In 2 O 3 in Janus structure are regulated. To investigate its TEA sensing application, gas sensors have been fabricated and the concentration of TEA gas is set at 20 ppm. The gas sensing results indicate that the optimum ratio of SnO 2 to In 2 O 3 is 1:1 and the gas sensors exhibit good sensing performances including a good response (8.45), short response time (4 s), high signal-to-noise ratio (4.45) and stable reproducibility. The improved gas sensing performances can be attributed to the n-n type Janus heterostructure interface. This research may make contributions to the development of semiconductor heterostructure sensing materials and gas sensors.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
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