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.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Kechuang Wan,Ding Wang,Feng Wang,Huijun Li,Jingcheng Xu,Xianying Wang,Junhe Yang
In this work, three-dimensional (3D) hierarchical In2O3@SnO2 core–shell nanofiber (In2O3@SnO2) was designed and successfully prepared via a facile electrospinning and further hydrothermal methods. Vertically aligned SnO2 nanosheets uniformly grown on the outside surface of In2O3 nanofibers were clearly observed by field emission scanning electron microscopy. Besides, hierarchical core–shell nanostructure of In2O3@SnO2 was characterized by elemental maps using scanning transmission electron microscopy. The formaldehyde (HCHO) sensing performances of pure In2O3 nanofibers, SnO2 nanosheets, and In2O3@SnO2 core–shell nanocomposite were compared, and the In2O3@SnO2 nanocomposite possessed highest response value, fast response/recovery speed, best selectivity, and lowest HCHO detection limit. Specifically, the response value (Ra/Rg) of the In2O3@SnO2 nanocomposite reached 180.1 toward 100 ppm of HCHO gas, which was near 9 and 6 times higher than that of the pure In2O3 nanofibers (Ra/Rg = 19.7) and pure SnO2 nanosheets (Ra/Rg = 33.2), respectively. In addition, the gas sensor showed instantaneous response/recovery time (3/3.6 s) toward 100 ppm of HCHO at the optimal operation temperature of 120 °C. More importantly, the detection limit toward HCHO gas was as low as 10 ppb (Ra/Rg = 1.9), which could be used for trace HCHO gas detection. The excellent sensing properties of the In2O3@SnO2 were attributed to the synergistic effect of large specific surface areas of SnO2 nanosheet arrays, abundant adsorbed oxygen species on the surface, unique electron transformation between core–shell heterogeneous materials, and long electronic transmission channel of SnO2 transition layer. This work provides an efficient route for the preparation of novel hierarchical sensitive materials.
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TALANTA
·
2025
·
IF 6.1
Ling Gao,Juhua Xu,Xianwang Yang,Chang Xu,Xiaolong Wang,Quan Jin
For commonly used chemical resistance sensors, achieving room-temperature detection often results in reduced performance. Microwave gas sensors have been rapidly expanding in recent years, attributed to their advantages of room-temperature operation and low power consumption. Waveguide , as a three-dimensional microwave circuit with separated electric and magnetic field distributions, resulting in high quality factor , is expected to significantly enhance the sensitivity of microwave sensors . Additionally, the hierarchical porous structure of monolithic In 2 O 3 facilitates gas diffusion , further enhancing sensing performance. Herein, a microwave gas sensor is designed by applying porous monolithic In 2 O 3 and waveguide resonator . By adjusting the content of the polymer PVP, In 2 O 3 with different pore sizes is synthesized in which hierarchical porous In 2 O 3 sample with a PVP content of 3.0 g (3.0-HPS In 2 O 3 ) exhibits the best NH 3 sensing properties, including a wide concentration range (0.01–2000 ppm), a low limit of detection (LOD) of 7 ppb, excellent selectivity , good moisture resistance , and long-term stability. This study offers a promising approach for the development of room-temperature ammonia gas sensors with an extended detection range and has preliminarily explored the influence of pore sizes on gas sensing performance.
研究领域:
传感器与传感技术
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微波工程
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材料科学
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气体检测
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纳米材料
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Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2026
·
IF 4.6
Tianyuan Xiao,Xinyue Dong,Nan Yang,Yanming Zhang,Xiaoya Ding,Guangming Yin
To address the increasingly serious problem of antibiotic contamination, the hydrothermal method was employed to synthesize In 2 O 3 /α-Bi 2 O 3 photocatalysts. For tetracycline (TC) in aqueous solution, its photocatalytic degradation efficiency driven by visible light was systematically evaluated. The physical structure, optical properties and charge transfer of the composite materials were characterized and analyzed by XRD, PL and EIS. Nanoparticles In 2 O 3 was uniformly loaded on spindle-shaped α-Bi 2 O 3 , and the specific surface area increased to 17.08 m 2 /g. The composite material demonstrated a strong TC photodegradation ability, with a degradation efficiency of 86.99% (catalyst dosage = 30 mg, pH = 6, and initial TC concentration = 5 mg·L −1 ). The experimental results show that its excellent performance is attributed to the formation of heterojunctions, which have improved visible light absorption and efficient charge transfer. Free radical scavenger studies have confirmed that ·O₂ − and h + generated by photocatalysts account for the efficient degradation of TC, thus laying a foundation for the practical application of photocatalysts. This study innovatively constructs an In 2 O 3 /α-Bi 2 O 3 heterojunction with tailored loading ratio, which not only extends the visible-light response range but also promotes directional charge transfer, thus achieving superior photocatalytic degradation of tetracycline.
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2026
·Vol. 37
·期 17
·1312
·
IF 3.2
Zhang Ke,Zhang Hao
This research paper tackles the cross-sensitivity problem commonly encountered in metal oxide semiconductor gas sensors by suggesting a heterojunction structure to improve their overall gas-sensing performance. Pure-phase In 2 O 3 nanocubes and In 2 O 3 /SnO 2 heterojunction composites were effectively synthesized via a one-pot hydrothermal method, and their sensing properties towards formaldehyde gas were systematically investigated. The experimental findings indicate that, in comparison with the pure In 2 O 3 sensor, the In 2 O 3 /SnO 2 heterojunction sensor displays significantly higher response values to formaldehyde at the same operating temperature, along with more rapid response and recovery rates. Additionally, this heterojunction sensor demonstrates excellent selectivity for formaldehyde, retaining its high selectivity even in the presence of various interfering gases. This study offers a feasible approach for the development of highly sensitive, selective, and rapidly responsive formaldehyde gas sensors, and provides a valuable reference for the progress of gas sensor technology.
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JOURNAL OF SOLID STATE CHEMISTRY
·
2025
·
IF 3.5
Daobin Zhu,Junshan Hu,Yuxiang Wu,Keyu Guo,Changchun Ding,Rangrang Fan,Chunfeng Dong,Wei Jin,Yongtao Liu
Er 3+ ions and Yb 3+ ions co-doped indium oxide (In 2 O 3 ) phosphors were successfully synthesized by high temperature solid phase method. At 980 nm laser excitation, the phosphor has weak 552 nm green and strong 661 nm red emission bands. And the upconversion luminescence (UCL) intensity of red light is significantly stronger than that of green light. They are attributed to the 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 transitions of Er 3+ , respectively. And the optimal sample is In 2 O 3 : 4 % Er 3+ , 10 % Yb 3+ . The appearance of phosphor was observed by field emission scanning electron microscopy. The UCL of phosphor is a two-photon process based on power dependence. In addition, photoluminescence excitation spectra and down-conversion luminescence spectra are used to explain the luminescence mechanism. The temperature sensing property of the phosphor in the temperature range of 348 K–598 K were tested. The sensitivity were obtained by fluorescence intensity ratio ( FIR ). The fit degree of FIR is 0.9936. It achieves a maximum relative sensitivity of 0.73 % K −1 at 348 K and a maximum absolute sensitivity of 0.039 K −1 at 373 K. In 2 O 3 : Er 3+ , Yb 3+ phosphors with high quality luminescence and excellent sensitivity have important application value in non-contact temperature measurement.
研究领域:
材料科学
·
光学
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SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Liwei Zhang,Jinmei Tian,Yuting Wang,Tianqi Wang,Meijie Wei,Feng Li,Dan Li,Ying Yang,Hui Yu,Xiangting Dong
Polyoxometalates (POMs), as a kind of electron acceptors , comes into sight in gas sensing field. Here, we in situ construct a group of polyoxomethoate/semiconductor one-dimensional tandem heterojunction materials using convenient one-step coaxial electrospinning method . A polyoxometalates electron acceptor layer was intercalated into In 2 O 3 @SnO 2 nanofibers (NFs), forming In 2 O 3 @PW 12 @SnO 2 coaxial core-middle-shell NFs. Gas sensing performances of the one-dimensional In 2 O 3 @PW 12 @SnO 2 tandem heterojunctions were investigated for the first time. The fabricated NFs exhibited excellent detection performances for ethanol gas. The optimal sensitivity response to 100 ppm ethanol can reach 22.6, which is about 4 times that of POMs-free samples. Other gas sensing parameters were also comprehensively studied. The significant enhancement can be attributed to the addition of appropriate amount of PW 12 electron acceptor which accelerate electrons transfer and reduce the recombination of electron-hole pairs. This work provides a novel strategy for developing high performance gas sensors by constructing tandem heterojunctions as well as introducing POMs electron acceptor, and offers new insight into the development of POMs-based gas sensors.
研究领域:
材料科学
·
化学传感器
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SENSORS AND ACTUATORS B-CHEMICAL
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2019
·
IF 6.393
Shuqin Yang,Zhilong Song,Naibo Gao,Zhixiang Hu,Licheng Zhou,Jingyao Liu,Baohui Zhang,Guangzu Zhang,Shenglin Jiang,Hua-Yao Li,Huan Liu
Indium oxide (In 2 O 3 ) nanomaterials have been investigated extensively as promising candidates for gas sensor applications. Here, we fabricate near room temperature operable H 2 S-sensitive gas sensors based on In 2 O 3 colloidal quantum dots (CQDs). Room-temperature film deposition of In 2 O 3 CQDs followed by surface ligand exchange treatment through Cu inorganic salts was employed to construct the sensor devices. Combined with a moderate annealing treatment, the long-chain ligands surrounding the quantum dot surfaces were completely removed to enhance gas adsorption and carrier transport, simultaneously resulting in the formation of CuO that may act as a catalytic promoter or form p-n heterojunction for selective H 2 S detection. The sensors exhibited high response up to 90 toward 5 ppm of H 2 S with response/recovery time of 72 s/200 s respectively, suggestive of a performance improvement compared to the In 2 O 3 -based H 2 S sensors reported in existing literature. The power law analysis indicated that the main oxygen species adsorbed on the surfaces were O 2 − and O − with the proportion of approximate 1:1 at near room temperature. The gas-sensing mechanism was attributed to the decisive role of surface states in determining the electrical conduction of quantum dot gas sensors.
研究领域:
材料科学
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传感器技术
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纳米科技
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JOURNAL OF ELECTRONIC MATERIALS
·
2016
·Vol. 46
·期 1
·363-369
·
IF 1.491
Wang Xuesong,Li Haiying,Ni Mucui,Wang Lianyuan,Liu Li,Wang Han,Guo Xuexin
The ruptured Nd-doped In 2 O 3 porous nanotubes have been successfully synthesized by single-capillary electrospinning method. The morphologies of the as-prepared materials were characterized by scanning electron microscopy and transmission electron microscopy. It can be seen obviously that the surface of the nanotubes are distributed with cracks and pores, which formed such an open nanostructure. The crystal structures and components were determined by x-ray diffraction, energy-dispersive x-ray spectroscopy and x-ray photoelectron spectrometer. The gas-sensing properties of ruptured Nd-doped In 2 O 3 porous nanotubes were studied and the results show the excellent performances of the as-obtained materials. The response of ruptured Nd-doped In 2 O 3 porous nanotubes to 100 ppm of formaldehyde is 46.8 at the optimum temperature of 240°C. The response and recovery times are 8 s and 22 s, respectively. Furthermore, the lowest detection limit of formaldehyde is 100 ppb with the value of 2.4. In addition, the ruptured Nd-doped In 2 O 3 porous nanotubes exhibit good selectivity to formaldehyde and long-term stability.
研究领域:
材料科学
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环境科学
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JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2015
·
IF 1.909
Xuesong Wang,Jinbao Zhang,Lianyuan Wang,Shouchun Li,Li Liu,Chang Su,Lili Liu
Pure and Er-doped In 2 O 3 nanotubes were systematically fabricated by using a single nozzle eletrospinning method followed by calcination . The as-synthesized nanotubes were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) spectrometry and X-ray powder diffraction (XRD). Compared with pure In 2 O 3 nanotubes, Er-doped In 2 O 3 nanotubes exhibit improved formaldehyde sensing properties at 260 °C. The response of Er-doped In 2 O 3 nanotubes to 20 ppm formaldehyde is about 12, which is 4 times larger than that of pure In 2 O 3 nanotubes. The response and recovery times of Er-doped In 2 O 3 nanotubes to 20 ppm formaldehyde are about 5 and 38 s, respectively. Furthermore, the response of Er-doped In 2 O 3 nanotubes to 100 ppb formaldehyde is 2.19.
研究领域:
材料科学
·
环境科学
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Peng Chen,Xingtian Yin,Meidan Que,Yawei Yang,Xiaobin Liu,Wenxiu Que
Indium oxide (IO) has been demonstrated as an efficient and stable electron transporting layer for planar heterojunction perovskite solar cells , but dispersive pinholes in the sol-gel derived IO film limit its hole blocking capacity and corresponding device performance. In this study, we introduce an ultrathin TiO x interlayer between Indium Tin Oxide (ITO) substrate and IO film via a low temperature TiCl 4 treatment method. By optimizing the process time, we obtain the optimal perovskite solar cells with a 30 min TiCl 4 treatment process, showing an impressive power conversion efficiency of 16.38%. In addition, the average device efficiency is improved from 13.7% to 15.1%, which is mainly attributed to the greatly improved fill factor. By means of investigating film roughness, pinhole effect and open circuit voltage decay, we find that the low-temperature processed TiO x interlayer efficiently enhance the hole blocking capacity of the electron transporting layer, and consequently boost the device performance.
研究领域:
材料科学
·
能源科学
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CHEMISTRY-A EUROPEAN JOURNAL
·
2023
·
IF 4.3
Bingrong Wang,Nan Zhang,Yifeng Wang,Delun Chen,Junlei Qi,Jinchun Tu
Graphical Interface construction through experimental control of the introduced anions allows the tuning of the energy bands of photoanode materials. The cooperative energy band and electronical structure of In 2 O 3 /In 2 S 3 resulted in a photocurrent of 0.6 mA⋅cm −2 when exposed to light irradiation. This strategy has practical significance for developing low-cost, high-performance PEC sensors. In the past several decades, Photoelectrochemical (PEC) sensing still remains a great challenge to design highly-efficient semiconductor photocatalysts via a facile method. It is of much importance to design and synthesize various novel nanostructured sensing materials for further improving the response performance. Herein, we present an In 2 O 3 /In 2 S 3 heterostructure obtained by combining microwave assisted hydrothermal method with S-induced phase change, whose energy band and electronic structure could be adjusted by changing the S content. Combining theoretical calculation and spectroscopic techniques, the introduction of sulfur was proved to produce multifunctional interfaces, inducing the change of phase, oxygen vacancies and band gap, which accelerates the separation of photoexcited carriers and reduces their recombination, improving the electronic injection efficiency around the interface of In 2 O 3 /In 2 S 3 . As anticipated, an enhanced glucose response performance with a photocurrent of 0.6 mA cm −2 , a linear range of 0.1–1 mM and a detection limit as low as 14.5 μM has been achieved based on the In 2 O 3 /In 2 S 3 heterostructure, which is significant superior over its pure In 2 O 3 and S-doped In 2 O 3 counterparts. This efficient interfacial strategy may open a new route to manipulate the electrical structure, and energy band structure regulation of sensing material to improve the performance of photoelectrodes for PEC.
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