SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Xin-Yu Huang,Zong-Tao Chi,Jian Liu,Dong-Hua Li,Xiao-Jun Sun,Cong Yan,Yu-Chong Wang,Hao Li,Xue-Dong Wang,Wan-Feng Xie
Heterostructured semiconductor materials, combining the collective advantages of individuals and synergistic properties, have spurred great interest as a new paradigm toward detecting of volatile organic compounds recently. Direct use of NiS as a sensing material is impractical because the structure of NiS is unstable, exhibiting an undesirable sensing performance. Herein, we firstly report its incorporation into an ethanol gas sensor with a conventional n -type sensitive material of In 2 O 3 , and the gas sensing performance of the NiS@In 2 O 3 nanocomposites has been significantly enhanced. Nanofiber-like NiS and In 2 O 3 were fabricated via a synergetic approach of electrospinning and calcination processes. The diameters of crystalline NiS and In 2 O 3 are about 150 nm and 120 nm, respectively. Then, the NiS@In 2 O 3 nanocomposites were prepared via re-calcination of as-prepared NiS and In 2 O 3 nanofibers. The results show that the sensor based on NiS@In 2 O 3 exhibits a detecting limit of as low as 5 ppm and a short response time of 8 s at the optimum temperature of 300 ºC, which outstripped that (13 s) of pristine In 2 O 3 and pure NiS sensors (21 s) for the detection of ethanol gas. The remarkable improvement of sensing performance can be attributed to the p - n heterojunction in multi-component phases of NiS and In 2 O 3 .
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2025
·
IF 4.9
Hui Kang,Quan Shao,Luming Li,Yanlin Zhang,Xin Xiao,Yuefeng Liu
The gas-inducing strategy has proven highly effective in constructing high-density oxide interfaces. In this study, we utilized CO 2 hydrogenation reaction to induce the spontaneous dispersion of In 2 O 3 species on the surface of TiO 2 , forming numerous InO x /TiO 2 interfaces. The 2 %In 2 O 3 /TiO 2 catalyst demonstrated a 33-fold enhancement in reverse water-gas shift reaction (RWGS) performance after dispersion. Multi-technique characterization revealed that H 2 in the reactants reduced In 2 O 3 to partially reduced states (In +(3-x) ), which were more prone to migration. The spontaneous dispersion was not solely driven by the strong interaction (anchoring) ability of the support for In 2 O 3 species. Further mechanistic studies showed that the high-density InO x /TiO 2 interface formed via spontaneous dispersion significantly promoted the formation of formate species during CO 2 hydrogenation, which decomposed into CO at lower temperatures (297 °C), thereby improving catalytic performance. This work highlights the potential of atmosphere-induced structural evolution in catalysis, underscoring the importance of a comprehensive analysis of the activation, migration, and anchoring mechanisms, as well as the catalytic promotion principles of the induced structure.
研究领域:
催化化学
·
材料科学
·
表面科学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Shuai Nie,Jing Li,Yunxia He,Xitao Yin
Gas sensors with the p–n heterojunction have demonstrated distinct sensing responses to reducing gases, yet a clear understanding of the reaction pathways and selective adsorption mechanisms for specific gas components remains elusive, impeding practical applications. In this study, we constructed an atomic-level NiO–In 2 O 3 heterojunction and explored its adsorption behaviors and sensing properties for CO and H 2 by first-principles calculations. Analysis of its electronic properties, focusing on binding energy, differential charge density, and density of states, confirmed the creation of a highly stable NiO–In 2 O 3 heterojunction and alterations in the coordination environment of the surface-active atoms. These changes potentially led to differences in the affinity between the gas molecules and the adsorption sites. The calculations of the adsorption properties revealed that the adsorption capacity of H 2 is relatively weak compared to the strong interactions between CO and heterojunction surface atoms, indicating a readily variable reaction pathway for H 2 . Consequently, the adsorption configuration at the interface site on the NiO–In 2 O 3 heterojunction surface exhibited a predominantly p-type response for CO and a unique n-type response for H 2 . This interfacial effect of the heterojunction is crucial for the selective adsorption of CO and H 2 . Furthermore, the opposite response signal was verified by gas sensing tests, which also presented the superior stability of the NiO–In 2 O 3 sensor. The p–n heterojunction of the corresponding composites was effectively characterized. This research offers new insights into the selective adsorption mechanism, paving the way for the development of gas sensors.
研究领域:
材料科学
·
传感器技术
·
理论计算
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Feihu Mu,Chunxia Liu,Yun Xie,Shijian Zhou,Benlin Dai,Dehua Xia,Haibao Huang,Wei Zhao,Cheng Sun,Yan Kong,Dennis Y.C. Leung
A novel metal–organic framework (MOF)-derived rodlike AgCl/Ag/In 2 O 3 plasmonic photocatalyst has been successfully prepared by electrostatic self-assembly, co-precipitation, in-situ photoreduction, and calcination. The photocatalytic activity of the samples was systematically investigated by photocatalytic tetracycline (TC) oxidation and Cr(VI) reduction under visible light irradiation. Among the as-prepared samples, AgCl/Ag/In 2 O 3 -2 displayed the most effective photocatalytic activity. For photocatalytic TC oxidation, the apparent rate constant of AgCl/Ag/In 2 O 3 -2 was 0.5036 min −1 , which was 2.7, 6.5, and 1.8 times higher than that of In 2 O 3 (0.1845 min −1 ), AgCl/In 2 O 3 (0.1544 min −1 ) and Ag/In 2 O 3 (0.2850 min −1 ), respectively. In addition, AgCl/Ag/In 2 O 3 -2 also exhibited the highest activity for photocatalytic Cr(VI) reduction, and the photocatalytic Cr(VI) reduction rate of AgCl/Ag/In 2 O 3 -2 in 3hrs could reach 94.8%. The superior photocatalytic activity was due to the enhanced absorption in the visible light region caused by localized surface plasmon resonance (LSPR) and the efficient interfacial charge migration and separation in AgCl/Ag/In 2 O 3 samples. Moreover, the intermediates formed in the photocatalytic TC oxidation were identified by GC–MS. Finally, a series of characterizations and simulations (density functional theory, cambridge serial total energy package, and finite difference time domain) were carried out to demonstrate the plasmonic Z-scheme photocatalytic mechanism.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2022
·
IF 9.221
Yue Song,Bing Yang,Ziyu Ma,Yang Song,Jianbo Sun
Development research as a NO 2 gas sensor has attracted extensive attention recently. However, how to improve the electrical conductivity of materials, adjust the band structure of materials through photoexcitation and improve the carrier lifetime is still a challenge. In this work, an S-doped In 2 O 3 structure (S x /In 2 O 3−x ) was synthesized by enforcing the simple hydrothermal method . Doping directly controls the distribution of structural defects and oxygen vacancies in the material structure, and the response to NO 2 increases by orders of magnitude under photoexcitation. Various structural characterization techniques examined the properties of the S x /In 2 O 3−x -based material. More specifically, its electro-optical properties and the impact of S doping on its energy band structure were thoroughly analyzed to investigate the origins of the enhanced responsivity .
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2023
·
IF 16.5
Xuan Li,Xingxing Jiang,Yan Kong,Jianju Sun,Qi Hu,Xiaoyan Chai,Hengpan Yang,Chuanxin He
Electrocatalytic CO 2 reduction reaction (eCO 2 RR) to obtain formate is a promising method to consume CO 2 and alleviate the energy crisis. Indium-based electrocatalysts have demonstrated considerable potential to produce formate. However, their unsatisfactory long-term stability and selectivity restrict their widespread application. In this study, a heterostructure of GaN- and In 2 O 3 -encapsulated porous carbon nanofibers was constructed via electrospinning and the phase transition of eutectic gallium-indium during calcination . The GaN and In 2 O 3 nanoparticle-encapsulated porous carbon nanofibers, when used as electrocatalysts for eCO 2 RR, displayed high formate selectivity with a faradaic efficiency of 87% and maximum partial current density of 29.7 mA cm −2 in a 0.5 mol L −1 KHCO 3 aqueous solution. The existence of the interface can cause a positive shift in the In 3 d binding energy, leading to electronic redistribution. Moreover, the GaN component induced a higher proportion of O-vacancy sites in the In 2 O 3 phase, resulting in improved selectivity for CO 2 -to-formate. In-situ Raman experiments and density functional theory calculations revealed that the interface between GaN and In 2 O 3 could lower the adsorption energy of the key intermediates for formate production, thus providing superior eCO 2 RR performance. In addition, the framework of the porous carbon nanofibers exhibited a large electrochemically active surface area, which enabled the full exposure of the active sites. This study highlights the cooperation between GaN and In 2 O 3 components and provides new insights into the rational design of catalysts with high CO 2 -to-formate conversion efficiencies.
研究领域:
材料科学
·
环境科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Interdisciplinary Materials
·
2022
·Vol. 1
·期 4
·526-536
·
IF 0
Wanjia Tian,Peiquan Song,Yaping Zhao,Lina Shen,Kaikai Liu,Lingfang Zheng,Yujie Luo,Chengbo Tian,Liqiang Xie,Zhanhua Wei
Carrier recombination at the buried SnO 2 /perovskite interface limits the efficiency and stability of n-i-p-structured perovskite solar cells (PSCs). Herein, we report an In 2 O 3 interfacial layer with the distinctive structure of the monolithic compact/nanostructured bilayer. The partial hydrolysis nature of the In 3+ ion enables the formation of nanorods on top of the compact In 2 O 3 layer when spin-coating the In(NO 3 ) 3 aqueous solution. This novel interfacial layer reduces the pinholes of the SnO 2 film and increases the contact area between the perovskite and electron transport material. Therefore, PSCs with the incorporation of the interfacial layer demonstrate enhanced electron extraction and suppressed carrier recombination. Consequently, the champion device achieves a power conversion efficiency of 23.87% with a high fill factor of 82.14%. The optimized device also shows robust operational stability, retaining over 80% of the initial power conversion efficiency after working at the maximum power point for over 500 h under continuous one-sun illumination.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
DOI
NANO
·
2021
·
IF 1.556
Ze-Xiao Lei,Feng-Yi Yang,Cong Yuan,Lang Tai,Chang-Yu Yao,Dong Fang
The development of heterojunction composites with core–shell structure could effectively facilitate the separation of carriers. In this work, a novel In 2 O 3 -SnS 2 (IOS) core–shell heterojunction photocatalyst was successfully synthesized for the efficient photocatalytic reduction of hexavalent chromium (Cr(VI)), namely, the In 2 O 3 nanorods were obtained through successive hydrothermal and carbonization process using urea and glucose as template. Then, SnS 2 nanosheets were successfully in situ coated onto In 2 O 3 nanorods. The spectroscopic characterization and photo-electrochemistry test indicated that the IOS core–shell heterojunction could effectively accelerate the separation and transport of carriers and suppress the recombination of carriers. The photocatalytic performance of IOS was evaluated by photocatalytic reduction Cr(VI). The results showed that IOS-4 samples almost completely removed Cr(VI) (20 mg/L), within 90 min under visible light, which was superior to pure In 2 O 3 and SnS 2 . Furthermore, IOS samples also possess excellent stability, the removal efficiency was still maintained at 90% after five cycles. This work provided a reliable method for designing core–shell heterojunctions for the photocatalytic removal of Cr(VI) under visible light.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Ji Li,Ming Yang,Jiangbin Guo,Xianfa Zhang,Yingming Xu,Xiaoli Cheng,Lihua Huo
NO 2 is a dangerous gaseous pollutant, which is also a precursor to the formation of photochemical smog and ozone. It has negative impacts on the environment and human beings at local, regional and even the whole global scale. In this context, it is imperative to develop the efficient sensing materials for detecting NO 2 gas. In this study, a near room temperature NO 2 sensing material (In 2 O 3 /SnO 2 heterostructure) with “4S” index (selectivity, sensitivity, speed, stability) was constructed, it overcomes the drawbacks of traditional detection techniques and solves the unavoidable problems of metal oxide semiconductors in the sensing process (high temperature, cross response, weak response at low concentration, etc.). Meanwhile, the synergy between the surface structure and heterostructure interface of In 2 O 3 /SnO 2 has been thoroughly analyzed. More importantly, this study also sampled and monitored ambient air samples from different geographical locations and different time points in cities, which provides strong support for promoting the application of MOS sensors in real environment.
研究领域:
材料科学
·
环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yunshi Liu,Xing Gao,Feng Li,Geyu Lu,Tong Zhang,Nicolae Barsan
Pt-loaded In 2 O 3 mesoporous nanofibers (NFs) have been prepared by electrospinning, followed by a facile reduction method. The sample obtained by adding tea saponin into the spinning solution, sample In-TS, displays a more than 4 times higher specific surface area, value of 86.9 m 2 g −1 , than that of conventionally prepared samples. The loading with small-sized Pt nanoparticles (NPs) determines excellent gas sensing performance towards NO 2 down to ppb level (R g /R a = 2.8 to 10 ppb and 23.9–1 ppm) at room temperature (RT), by that significantly lowering the power consumption. The reason is that the open pores and channels on the mesoporous NFs generated by the foaming agent not only promote the adsorption and desorption of NO 2 molecules on the sensing layers, but also improves the transduction function of the sensors by ensuring that there are no parts of the fiber that are not accessible to the gases. The introduction of Pt to the mesoporous NFs could accelerate the dissociation of absorbed oxygen and the active surface reactions in NO 2 owing to the catalytic property and chemical sensitization of well-dispersed Pt NPs. Due to the unique gas sensing performance, sample In-TS-Pt has a prospect for applications in low-concentration NO 2 detection at RT.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 11
·4010
·
IF 3.4
Su Zhang,Baoyu Huang,Zenghao Jiang,Junfan Qian,Jiawei Cao,Qiuxia Feng,Jianwei Zhang,Xiaogan Li
Au modified TiO2/In2O3hollow nanospheres were synthesized by the hydrolysis method using the carbon nanospheres as a sacrificial template. Compared to pure In2O3, pure TiO2, and TiO2/In2O3based sensors, the Au/TiO2/In2O3nanosphere-based chemiresistive-type sensor exhibited excellent sensing performances to formaldehyde at room temperature under ultraviolet light (UV-LED) activation. The response of the Au/TiO2/In2O3nanocomposite-based sensor to 1 ppm formaldehyde was about 5.6, which is higher than that of In2O3(1.6), TiO2(2.1), and TiO2/In2O3(3.8). The response time and recovery time of the Au/TiO2/In2O3nanocomposite sensor were 18 s and 42 s, respectively. The detectable formaldehyde concentration could go down as low as 60 ppb. In situ diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS) was used to analyze the chemical reactions on the surface of the sensor activated by UV light. The improvement in the sensing properties of the Au/TiO2/In2O3nanocomposites could be attributed to the nanoheterojunctions and electronic/chemical sensitization of the Au nanoparticles.Keywords:Au modified TiO2/In2O3hollow nanospheres;room temperature formaldehyde sensors;UV activation;in situ DRIFTS
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2023
·
IF 5.5
Yifu Wang,Bin Yang,Biao Gao,Longtai Li,Yu Zhou,Yaping Zhang,Tatsumi Ishihara,Limin Guo
The efficient catalytic hydrogenation of CO 2 to methanol is a promising route for CO 2 emission mitigation and utilization. Recently, the Co-In based materials as one of the excellent alternative catalysts for CO 2 hydrogenation to methanol have received intense attention. Herein, we developed new and efficient Co-In based catalysts (the composite of Co 3 InC 0.75 and In 2 O 3 ) by Prussian Blue analogues (PBA) pyrolysis . And a series of Co 3 InC 0.75 -In 2 O 3 composites with tunable proportion of Co 3 InC 0.75 and In 2 O 3 has been prepared. The experimental results demonstrate the Co 3 InC 0.75 -In 2 O 3 catalysts have high catalytic CO 2 hydrogenation performance into methanol, reaching a methanol yield up to 0.62 g MeOH g cat −1 h −1 at 300 °C, 5 MPa, 24000 cm 3 STP g cat −1 h −1 , and H 2 /CO 2 = 3:1, the high reaction stability and air resistance. The synergetic effects between Co 3 InC 0.75 and In 2 O 3 for the enhanced methanol production were confirmed by a series of characterizations, and a positive correlation between methanol production activity and the fraction of Co 3 InC 0.75 /In 2 O 3 was well established.
研究领域:
化学工程
·
催化科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）