SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Jiayin Han,Yong Wang,Weirong Zhou,Dehao Kong,Yubing Gao,Yuan Gao,Geyu Lu
Nitrogen dioxide (NO 2 ) is a serious menace to human health and the environment, it is of great practical meaning to develop a fast and accurate gas sensor for monitoring low-concentration NO 2 at near room temperature (RT). Here, the polymorphism of In 2 O 3 was regulated with controllable mixed-phase ratios of hexagonal In 2 O 3 (h-In 2 O 3 ) and cubic In 2 O 3 (c-In 2 O 3 ) via a graphene oxide (GO)-mediated solvothermal approach and annealing treatment. The GO-mediation markedly promoted the formation of h-In 2 O 3 and defect content. The morphology, specific surface area, surface chemical state and activation energy were roundly analyzed. The NO 2 -sensing performance results showed that the sensor based on an 8 wt% GO-mediated In 2 O 3 sample (In 2 O 3 -8) exhibited an ultrahigh response of 1021 towards 1 ppm NO 2 at 30℃, which was 2.3 times higher than that of In 2 O 3 without GO-mediation. At the same time, the response/recovery time of In 2 O 3 -8 was significantly shorter than other sensors. Additionally, the In 2 O 3 -8 sensor possessed good repeatability and long stability. In 2 O 3 -8 with an appropriate GO-mediated content provided a suitable h-In 2 O 3 /c-In 2 O 3 phase junction interface, abundant oxygen vacancies and elevated Fermi energy levels of In 2 O 3 , which activated the surface sites and ultimately enhanced the sensing performance.
研究领域:
材料科学
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环境科学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Advanced Ceramics
·
2022
·Vol. 11
·期 3
·427-442
·
IF 11.534
Zhang Yu,Han Shuai,Wang Mingyuan,Liu Siwei,Liu Guiwu,Meng Xianfeng,Xu Ziwei,Wang Mingsong,Qiao Guanjun
One-dimensional nanofibers can be transformed into hollow structures with larger specific surface area, which contributes to the enhancement of gas adsorption. We firstly fabricated Cu-doped In 2 O 3 (Cu-In 2 O 3 ) hollow nanofibers by electrospinning and calcination for detecting H 2 S. The experimental results show that the Cu doping concentration besides the operating temperature, gas concentration, and relative humidity can greatly affect the H 2 S sensing performance of the In 2 O 3 -based sensors. In particular, the responses of 6%Cu-In 2 O 3 hollow nanofibers are 350.7 and 4201.5 to 50 and 100 ppm H 2 S at 250 °C, which are over 20 and 140 times higher than those of pristine In 2 O 3 hollow nanofibers, respectively. Moreover, the corresponding sensor exhibits excellent selectivity and good reproducibility towards H 2 S, and the response of 6%Cu-In 2 O 3 is still 1.5 to 1 ppm H 2 S. Finally, the gas sensing mechanism of Cu-In2O3 hollow nanofibers is thoroughly discussed, along with the assistance of first-principles calculations. Both the formation of hollow structure and Cu doping contribute to provide more active sites, and meanwhile a little CuO can form p–n heterojunctions with In 2 O 3 and react with H 2 S, resulting in significant improvement of gas sensing performance. The Cu-In 2 O 3 hollow nanofibers can be tailored for practical application to selectively detect H 2 S at lower concentrations.
研究领域:
材料科学
·
纳米技术
·
化学
✓ 已验证
DOI
高影响因子
MEASUREMENT SCIENCE and TECHNOLOGY
·
2014
·Vol. 25
·期 8
·085105
·
IF 1.352
Yixin Chu,Qianchun Zhang,Wanqin Zhang,Guoyi Zhang,Shouli Zhu
A gaseous sensor was developed for the determination of dimethyl ether (DME) on the basis of its cataluminescence (CTL) emission on the surface of MgO/In2O3 composite (mass ratio = 1:2). The sensor exhibited high sensitivity and selectivity to DME at a temperature of 245 °C. Under the optimized experimental conditions, the linear range of CTL intensity versus DME concentration was 50–12 000 ppm with a limit of detection of 14 ppm (signal to noise (S/N) = 3). By selecting the appropriate ratio of MgO to In2O3 and the detecting wavelength, the CTL intensities of ether and ethanol could be reduced to 7.3% and 3.9% compared with that of DME. For other compounds, including carbon tetrachloride, formaldehyde, dimethyl sulfate and methyl acetate, etc, no emissions or only very weak ones were detected. The sensor was applied to analyze samples spiked with known concentrations of DME. The concentrations of DME in all samples were well quantified with satisfactory recoveries.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Gongao Jiao,Peilin Jia,Yong Zhang,Hao Zhang,Jieshuo Zhai,Zuozhe Ding,Dongzhi Zhang
In this work, Fe 2 O 3 nanoparticles were synthesized through a simple hydrothermal method, and a high-performance Fe 2 O 3 -In 2 O 3 heterojunction hydrogen sensor was successfully fabricated via electrospinning. The morphology and elemental composition of the composite material were characterized through scanning electron microscopy, transmission electron microscopy, and X-ray photoelectron spectroscopy. A systematic performance test of the sensor was conducted using an experimental testing platform. The optimal doping ratio of Fe 2 O 3 was explored, and the sensor's optimal operating temperature was found to be 280°C. At this temperature, the sensor exhibited a response of 32.95 to 2000 ppm hydrogen, which is 7.6 times higher than that of the pristine In 2 O 3 , along with rapid response/recovery times (1.5 s/16 s), rosy selectivity, and stability. The improved sensor performance can be primarily ascribed to the creation of the heterojunction and the expanded specific surface area of the materials. The adsorption energy, charge transfer, and other properties of the Fe 2 O 3 -In 2 O 3 composite were calculated using density functional theory, further elucidating the reasons for the improvement in sensor performance.
研究领域:
材料科学
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传感器技术
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计算化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Wangchang Geng,Pengfei Song,Libing Duan,Tingyue Luan
Metal-organic frameworks (MOFs)-derived metal oxides have a high specific surface area and porous structure, making them promising for gas sensing applications. In this paper, MOFs-derived In 2 O 3 /ZnCo 2 O 4 composites were synthesized using a two-step solvothermal method. Through a series of characterization strategies, it is revealed that the morphology of the In 2 O 3 /ZnCo 2 O 4 composites consists of hollow microtubes and microflowers. The gas sensing performance of In 2 O 3 /ZnCo 2 O 4 composites was significantly enhanced compared to pure In 2 O 3 . Among them, the In 2 O 3 /ZnCo 2 O 4 -2 sensor exhibited superior performance towards 100 ppm n -butanol gas, with a lower operating temperature of 200℃, a higher response value of 208.7, a lower detection limit of 4.2 ppb, shorter response/recovery times of 152 s/223 s, higher selectivity, and better repeatability. Furthermore, the improved gas response can be attributed to the utilization of MOFs as self-sacrificial templates, the high specific surface area of the sensing materials, and the formation of p-n heterojunctions. This study provides a valuable reference for synthesizing n -butanol sensing materials with a high specific surface area, strong response, and excellent selectivity.
研究领域:
材料科学
·
化学
·
传感器技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2024
·
IF 4.3
Bonan Liu,Chuchu Yan,Qianqian Ren,Wei Li,Weihang Ma,Zhihao Liu,Han Zhang,Hongyang Zhu,Zhiyong Zhang,Wu Zhao,Yingnan Wang
In the field of electromagnetic wave (EMW) absorption, the development of nonmagnetic materials with strong absorptive performance, low filling ratio, and wide bandwidth is of significant importance. In this work, five morphologies of In2O3 nanomaterials are prepared by simple hydrothermal and annealing processes. The morphologies of products (including the lamellar flower-, lychee-, cheese-, nanocube-, and urchin-like In2O3) are obtained by using different surfactants. The experimental results indicate that the lamellar flower-like In2O3 has a minimum reflection loss (RLmin) of −52.04 dB (1.74 mm) and an effective absorption bandwidth (EAB) of 5.97 GHz (1.92 mm). Correspondingly, the RLmin and EAB of lychee-like In2O3 are −70.61 dB (2.55 mm) and 5.57 GHz (1.72 mm), respectively. A large specific surface area about lamellar flower-like In2O3 can effectively increase the reflection and scattering paths of EMW inside the absorbing material, which is beneficial for the attenuation of EMW. This work not only demonstrates the great potential of In2O3 in practical EMW absorption applications but also extends the research on nonmagnetic materials in the EMW absorption field.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Sustainability
·
2024
·Vol. 16
·期 10
·3988
·
IF 3.3
Jiantao Niu,Qi Hu
Photocatalytic water splitting by semiconductors is considered a promising and cost-effective method for achieving sustainable hydrogen production. In this study, a CF/SrTiO3/In2O3photocatalytic material with a double-layer core–shell structure was developed. The experimental results indicated that the produced CF/SrTiO3/In2O3composite fiber displayed superior photocatalytic hydrogen production performance, achieving a hydrogen evolution rate of approximately 320.71 μmol/g·h, which is roughly seven times higher than that of the CF/SrTiO3fiber alone. The enhanced photocatalytic activity of the CF/SrTiO3/In2O3fiber can be attributed to the heterojunction structure enriched with oxygen vacancies. It was found that these oxygen vacancies created defective states that served as traps for photogenerated electrons, facilitating their migration to the surface defect states and enabling the reduction of H+in water to produce hydrogen. Furthermore, the synergy between the heterojunction structure and the conductivity of the carbon fiber promoted the generation and migration of photogenerated electrons, reduced the recombination of photogenerated electron–hole pairs, and ultimately improved photocatalytic hydrogen production. This study presents a new approach for designing efficient photocatalysts with surface oxygen vacancies on carbon fibers, providing new insights into the sustainable application of photocatalysts.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2021
·Vol. 17
·期 36
·2102307
·
IF 13.281
Hongli Yang,Jiaqi Tang,Yong Luo,Xiaoqiang Zhan,Zhao Liang,Lan Jiang,Huilin Hou,Weiyou Yang
The development of efficient visible-light-driven photocatalysts is one of the critically important issues for solar hydrogen production. Herein, high-efficiency visible-light-driven In 2 O 3 /CdZnS hybrid photocatalysts are explored by a facile oil-bath method, in which ultrafine CdZnS nanoparticles are anchored on NH 2 -MIL-68-derived fusiform In 2 O 3 mesoporous nanorods. It is disclosed that the as-prepared In 2 O 3 /CdZnS hybrid photocatalysts exhibit enhanced visible-light harvesting, improves charges transfer and separation as well as abundant active sites. Correspondingly, their visible-light-driven H 2 production rate is significantly enhanced for more than 185 times to that of pristine In 2 O 3 nanorods, and superior to most of In 2 O 3 -based photocatalysts ever reported, representing their promising applications in advanced photocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Gang Chen,Ruonan Tian,Qiaolin Li,Tiantian Cao,Huai Tan,Hongtao Guan,Chengjun Dong,Elisabetta Comini
Design sensing materials with core-shell structure is an excellent strategy to achieve high sensing performance toward acetone detection. Herein, MIL-88A(Fe) was fabricated via a hydrothermal route, which renders as a template to fabricate Fe 2 O 3 @In 2 O 3 core-shell spindles structure. Gas sensing results show that the sensor based on Fe 2 O 3 @In 2 O 3 exhibit enhanced response of 193–200 ppm acetone than that of 36 for pristine Fe 2 O 3 at 200 °C. After Pt functionalization, the response of Fe 2 O 3 @In 2 O 3 /Pt to 200 ppm acetone is up to 839 at a reducing working temperature of 180 °C with a good selectivity and long-term stability. A synergistic mechanism originated from the intrinsic merits of Fe 2 O 3 and In 2 O 3 , the 1D core-shell structure, the creation of heterojunction at the interface of Fe 2 O 3 and In 2 O 3 and the creation of Shottky junction at In 2 O 3 and Pt nanoparticles, and the catalytic reaction of Pt holds accountable for the significant improvement in acetone sensing.
研究领域:
材料科学
·
化学传感
✓ 已验证
产品关联
DOI
高影响因子
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.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Zanyun Ying,Xinya Wang,Chengzhi Wu,Shihan Zhang
Photocatalytic NO degradation often suffers from sluggish charge carrier separation and low selectivity. Herein, a series of In 2 O 3 /TiO 2 (P25) composites were synthesized to enhance NO abatement. Benefiting from the conspicuous synergistic effect between In 2 O 3 and P25, the In 2 O 3 /P25 catalysts demonstrated more than double the NO elimination performance compared to pure P25 and In 2 O 3 . The In 2 O 3 /P25 sample with 75 wt% In 2 O 3 (In-P25-75) achieved a NO removal efficiency of 51.7 %, higher than reported catalysts (30.0–49.0 %). It was the successful formation of type-II heterostructure that enabled intimate interfacial contact and provided ample electron transfer channels. Moreover, photoluminescence spectra and photoelectrochemical measurement confirmed the improved separation and inhibited recombination of photogenerated charge carriers in In-P25-75, thereby boosting the NO photocatalytic efficiency. ·O 2 − and ·OH radicals generated by photoinduced electron transfer to the conduction band of P25, along with the induced holes confined to the valence band of In 2 O 3 , facilitated the targeted deep oxidation of trace NO into NO 3 − rather than harmful NO 2 . This work discloses a promising strategy for the efficient removal of NO from the atmosphere by reducing the emission of hazardous intermediate NO 2 .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·
IF 3.5
Jiayang Huang,Yao Su,Zhangjie Qian,Miaoer Wu,Yunchang Xie,Chao Zeng
The photocatalytic conversion of CO2 and H2O into useful chemicals or fuels over semiconductor photocatalysts is regarded as a promise technology to settle the problems of global warming and energy exhaustion. Whereas, the inefficient photo-absorption and slow charge dynamics limit the CO2 photoreduction efficiency. Here, a ternary heterojunction photocatalyst Cu2Cl(OH)3/In/In2O3 (Cu H IO) with intimate interface is obtained via hydrogen chemical reduction approach followed by hydrolysis reaction, where In species can be produced on the surface of In2O3 from the hydrogen chemical reaction with the calcining temperature over 500℃. The Cu H IO exhibits enhanced photocatalytic activity of CO2 conversion to the pristine In2O3, In2O3 with In species (H IO), and Cu2Cl(OH)3/In2O3 (Cu IO). On the absence of sacrificial agent or cocatalyst, the yield rate of CO and CH¬4 over Cu H IO are 4.36 and 1.09 μmol·g-1·h-1, which is 8.38-fold and 18-fold that of pristine In2O3 (0.52 and 0.06 μmol·g-1·h-1), respectively. The photocatalytic performance enhancement of Cu H IO results from the construction of the ternary heterojunction, which synchronous improve the photo-response and charge separation of In2O3. Moreover, the possible CO2 reduction pathway over Cu H IO has also been investigated and proposed. This work provides an important strategy for developing high-efficiency heterojunction photocatalyst system for solar fuel generation.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）