MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Caixin Shi,Xinghui Hou,Rong Guo,Wenpu Zhang,Ying Zhou
Zn-doped In 2 O 3 starfish-like dendritic structures (IZ x, x =0, 1, 3, 5) were successfully synthesized by a facile co-precipitation method and applied for triethylamine (TEA) sensing. The influence of Zn addition on the phase structure, microstructure, chemical composition and surface state of IZ x sensor was characterized by XRD, Raman, UV-vis, SEM, TEM, XPS and BET analyses. TEA-sensing performance was measured by gas-sensing test system at 40% humidity. Results show that the typical IZ3 sensor has a high response of 156.2 and short response/recovery times of 6 s/165 s after exposure to 5 ppm TEA at optimal temperature of 140 ºC. It also exhibits a low detection limit of 0.1 ppm, excellent selectivity to TEA, and long-term stability. The excellent TEA-sensing ability of IZ x -based sensors may be attributed to their unique morphology with large specific surface area, suitable internal defects and band gap induced by Zn-doping. Therefore, Zn-doped In 2 O 3 sensors have potential applications in actual TEA-detection.
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
VACUUM
·
2024
·
IF 3.8
Na Liu,Weiyi Bu,You Zhou,Yan Zhang,Xiaohong Chuai,Geyu Lu
Metal-organic frameworks (MOF)-derived materials have been a research hotspot in the field of gas sensor. In this work, the MOF-derived spindle-like In 2 O 3 mixed with the ZIF-67 was calcined to obtain xCo-In (x = 0.03, 0.05, 0.07) sensing composite materials. Various characterization techniques, such as XRD, SEM, TEM, UV–vis and XPS were adopted to analyze their crystalline structures, detailed morphology structures, texture properties, bandgap width and element valence states. For In 2 O 3 /Co 3 O 4 composites, their sensing properties for acetone are greatly improved compared with pure In 2 O 3 , and the response of 0.05Co-In to 100 ppm acetone can reach 226.1 at an operating temperature of 175 °C with a response time of 1 s In 2 O 3 /Co 3 O 4 composites remained the morphologies of MOF templates, exhibiting large specific surface area. Combining the gas-sensitive behavior with characterization results, the effect of heterojunction between In 2 O 3 and Co 3 O 4 is discussed. Their interface interaction increases the ratio of Co 2+ /Co 3+ , content of oxygen vacancy/adsorbed oxygen, and material resistance, being important reasons for the improved sensing performance. The prominent interface effect may originate from Co 3 O 4 which has the variable valence ion. This work provides a strategy for constructing heterojunction to achieve a high-performance gas sensor.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Jingjing Liu,Liuyang Zhang,Bei Cheng,Jiajie Fan,Jiaguo Yu
Timely detection of formaldehyde is pivotal because formaldehyde is slowly released from the indoor decorative materials, jeopardizing our healthy. Herein, a high-response formaldehyde gas sensor based on Ag-ZnO/In 2 O 3 nanofibers was successfully fabricated. Compared with all the control samples, the hybrid exhibits superior sensitivity (0.65 ppm −1 ), excellent selectivity (≥ 12.5) and durable stability (the deviation value ≤ 3%). Particularly, an ultra-high response value of about 186 towards 100 ppm of formaldehyde at 260 °C was achieved, heading the list of outstanding candidates. Additionally, the limit of detection is as low as 9 ppb. The enhanced gas sensing properties can be mainly attributed to multi-level heterojunctions (n-n heterojunction and Ohmic junction) and the “spill-over” effect of Ag, ultimately increasing the adsorption of gas molecules on the surface of sensing material. This work verifies that proper design of multi-level heterojunctions significantly upgrade the sensing performance.
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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yang Li,Jingjing Yu,Jianshan Zeng,Yinyue Ye,Qiao Yin,Yingshan Zeng,Zhi Liu
The utilization of CO 2 photoreduction into valuable hydrocarbon fuels presents a promising avenue for mitigating climate change and providing a sustainable energy source. However, photogenerated carriers are highly prone to recombination, which adversely affects photocatalytic activity. In our study, we introduce a novel photocatalyst synthesis method, featuring an Ohmic contact (OC) structure that incorporates biomass-derived hollow carbon microspheres (HCM), Pd nanocubes (NC), and Indium Oxide (In 2 O 3 ) through a simple yet effective thermal reduction method. This modification significantly enhances the photocatalytic efficiency of the Pd NC/In 2 O 3 /HCM (donated as PIC) system, achieving an optimal value of 496.89 μmol∙g −1 over 5 h without the need for additional additives, 8.7-fold higher than that of the pristine In 2 O 3 . Experimental and theoretical results reveal that the substantial enhancement in CO 2 photoreduction performance can be attributed to the ultra-low resistance (122 Ω) interfaces within the PIC system, facilitating accelerated transfer of photogenerated electrons. This work provides a strategy for boosting CO 2 photoreduction efficiency by the reduction of interface resistance to promote rapid photogenerated electron migration.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2025
·
IF 2.5
Li Lingyu,Ma Qian,Zhao Dongheng,Zhang Huayushuo,Li Bolong
Recently, the development of an n-pentane-sensing product has always been plagued by the lack of suitable inorganic material with good gas-sensing response and selectivity at low operating temperatures. In this work, Ti-MIL-125-induced one-dimensional tubular In 2 O 3 /TiO 2 heterostructures have been fabricated by a facile electrospinning method and a subsequent heat-treatment process. Obvious morphological evolution from a fibrous to a tubular shape with the presence of In 2 O 3 -TiO 2 heterojunctions can be adjusted by varying the added amount of the Ti-ML-125 component. Compared with pure In 2 O 3 , the optimal In 2 O 3 /TiO 2 composites exhibit a blue-shifted energy band (2.52 eV) and an increased specific surface area (227.70 m 2 /g), as well as the enhanced gas-sensing performance on various concentrations of n-pentane. For example, In 2 O 3 /TiO 2 -3% can not only display excellent long-term stability and humidity stability but also has a high response of 670–100 ppm n-pentanol at 50°C, much larger than that of pure In 2 O 3 (50) at 150°C. Significantly, In 2 O 3 /TiO 2 -3% can still reach the high response of 197–100 ppm n-pentanol at room temperature. According to density functional theory (DFT) calculations, the enhanced gas-sensing mechanism is mainly attributed to the combination of the distinctly increased surface active sites through the regulation of morphology and the introduction of effective In 2 O 3 -TiO 2 heterojunctions, which can be beneficial to improving the surface adsorption/desorption characteristics and the electron transport between n-pentanol and the sensing material interface. Graphical
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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Wenhui Li,Jiaxing Zhang,Xiao Jiang,Minchen Mu,Anfeng Zhang,Chunshan Song,Xinwen Guo
Carbon dioxide (CO2) hydrogenation to gasoline through the methanol-mediate route using the metal oxide/ZSM-5 tandem catalyst has attracted considerable attention to reduce the pernicious effect of CO2 on global climate change and to reduce our dependence on fossil fuels. The C5+ molecules are preferred to pass through the straight channels of ZSM-5 zeolite, where side reactions may occur on the acid sites and the catalyst is deactivated due to pore blockage. Thus, the thickness of ZSM-5 along the straight channel, namely the b-axis direction, is crucial to manipulating the product distribution and catalyst lifetime. Here, HZSM-5 nanosheets with different thicknesses (2 nm to 2 μm) along the b-axis were synthesized controllably and composited with In2O3/ZrO2 as tandem catalysts for CO2 hydrogenation to gasoline. In2O3–ZrO2/HZSM-5 with a thickness of 20 nm shows the highest selectivity toward C5+ hydrocarbons under isoconversional conditions and no deactivation after 150 h of reaction with less carbon deposition compared with the 2 μm one. Comparative activity tests and characterization results demonstrate that an appropriate length of straight channels can benefit the production of C5+ hydrocarbons through the polymerization of short-chain molecules while preventing the cracking of long-chain hydrocarbons on acid sites. Adding an appropriate loading of Co into tandem catalysts with optimal composition gives rise to further enhancement in CO2 conversion by 10%, and a slight increase in C5+ selectivity. This can be attributed to the Co-induced hydrogen spillover from metallic Co to support ZrO2, facilitating the formation of the key intermediate and its subsequent hydrogenation steps. This study provides insights into designing effective and anti-carbon deposition tandem catalysts for CO2-to-gasoline by manipulating the channel length–resident time–acidity relationship and the promoter effect.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Yunshi Liu,Rui Wang,Tong Zhang,Sen Liu,Teng Fei
The development of NO 2 gas sensors is of great importance for air quality monitoring and human health. In this work, In 2 O 3 and zeolitic imidazolate framework-8 (ZIF-8) heterostructures were synthesized and designed as efficient sensing materials for NO 2 detection. The ZIF-8 nanocrystals were uniformly deposited on In 2 O 3 nanofibers (NFs) by using a self-template strategy, where In 2 O 3 /ZnO NFs act as the source of Zn 2+ for the formation of ZIF-8 and as the template. By tuning the amount of Zn 2+ in the composite NFs, different morphologies from In 2 O 3 NFs with minimal ZIF-8 loading to an In 2 O 3 /ZIF-8 core-shell complex were obtained. The optimized In 2 O 3 /ZIF-8 NFs show a remarkably high response to 1 ppm NO 2 (R g /R a = 16.4) and enhanced humidity resistance due to the hydrophobicity of ZIF-8 in comparison with those of the pristine In 2 O 3 NF sensor (R g /R a = 4.9) at 140 °C. The gas sensing mechanism of In 2 O 3 /ZIF-8, which is based on electron transduction, surface chemistry, and the functional interface between the loaded ZIF-8 and In 2 O 3 matrix, was proposed. Additionally, the large number of pores, which were formed by the in situ conversion of ZnO grains in the matrix, ensures that all parts of the In 2 O 3 NFs are accessible to gases. This facile strategy paves the way for the design of metal oxide/MOF complex architectures with tunable metal centers for various applications, including gas sensing.
研究领域:
材料科学
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环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Catalysis Science & Technology
·
2023
·Vol. 13
·期 15
·4400-4408
·
IF 5
Zhengxin Peng,Xiangbowen Du,Nan Lu,Jing Sui,Xiaofan Zhang,Renhong Li,Xiaoqing Yan
The rational design and fabrication of junction-based photocatalysts is of great importance to enhance the photocatalytic efficiency of water splitting. Herein, a new heterophase junction photocatalyst consisting of cubic bixbyite and rhombohedral corundum In2O3 (c-In2O3 and h-In2O3) was readily prepared by directly annealing an InOOH precursor in an inert atmosphere. The resulting c/h-In2O3 heterophase junction photocatalyst showed an optimal hydrogen production rate of 0.73 mmol g−1 h−1 in a 6 h period reaction from alkaline formaldehyde solution in the presence of molecular oxygen under visible light irradiation, which was approximately 5.6 and 3.4 times higher than that of single-component c-In2O3 and h-In2O3, respectively. The superior photocatalytic activity of the c/h-In2O3 heterophase junction was partially attributed to its appropriate band gap and band positions. Spectroscopic characterization and photoelectrochemistry experiments indicated that the heterophase junction photocatalyst could effectively enhance charge separation and transfer abilities between h-In2O3 and c-In2O3. Furthermore, molecular O2 was found to play a key role in mediating the photocatalytic H2 evolution from formaldehyde oxidation as a catalytic electron scavenger, and O2 was not consumed throughout the reaction. Thus, the photocatalytic activity was also greatly enhanced because the adsorption ability of oxygen species was effectively improved after the formation of heterophase junctions.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2015
·Vol. 40
·期 2
·1756-1764
·
IF 3.086
Jiuyu Liu,Xin Li,Xiang Chen,Hao Niu,Xiao Han,Ting Zhang,Huiming Lin,Fengyu Qu
SnO2/In2O3 hetero-nanotubes (SINs) were successfully produced using a novel coaxial-electrospinning method with pure polyvinylpyrrolidone (PVP) plus Sn/In salt as the outer shell and PVP as the inner component. After the calcination process, these SnO2/In2O3 hetero-nanotubes with diameters of 80–120 nm and lengths of several micrometers were obtained. All the SINs are assembled by plenty of nanoparticles (10–50 nm), bringing about abundant porous structures as well as large surface areas (up to 56 m2 g−1). These SnO2/In2O3 hetero-nanotubes exhibit high response (400 at 500 ppm), low detection limit (down to 250 ppb), fast response (60 s)/recovery (97 s), good retention (94.68% for 30 day) and excellent selectivity toward formaldehyde. Gas sensing mechanism has been discussed by adjusting the amount of the two components. Based on detail investigations, it can be concluded that the enhanced response performance lies in the particle size, porous structure, surface area, and component ratio of the heterostructure.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 19
·11215-11223
·
IF 3.361
Xiangxiang Fan,Yajuan Xu,Wuming He
Pure NiO nanofibers and the In2O3–NiO one-dimensional heterogeneous nanofibers were prepared by electrospinning, and the gas sensing properties to acetone were also investigated. Material characterization proved that the heterogeneous nanofibers were composed of In2O3 and NiO, and the nanofibers exhibited an enhanced sensitivity to acetone. At the optimal working temperature, the response of In2O3–NiO nanofibers to 50 ppm acetone was more than 10 times higher than that of pure NiO nanofibers. The minimum detection limit of the heterogeneous nanofibers reached 10 ppb, while the pure NiO nanofibers only reached 100 ppb. Among acetone and the comparison gases (methanol, ethanol, triethylamine, ethyl acetate, and benzene), the heterogeneous nanofibers achieved the highest response to acetone. In addition, the heterogeneous nanofibers exhibited an improved response–recovery rate and good long-term stability. These results indicated that the In2O3–NiO one-dimensional heterogeneous nanofibers have great potential in low-concentration acetone detection. Combined with the material properties, the mechanism of the enhanced sensing properties was discussed in detail for the In2O3–NiO heterogeneous nanofibers.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Tiancheng Wang,Zehao Shi,Furan Wang,Shengrui Cui,Zengqi Zhang,Wei Liu,Yongcheng Jin
The shuttle effect of soluble lithium polysulfides (LiPSs) poses a crucial challenge for commercializing lithium–sulfur batteries. The functionalization of the separator is an effective strategy for enhancing the cell lifespan through the capture and reuse of LiPSs. Herein, a novel In2O3 nanorod with an ultrathin carbon layer (In2O3@C) was coated on a polypropylene separator. The results demonstrate the adsorption and catalysis of In2O3 on polysulfides, effectively inhibiting the shuttle effect and improving the redox kinetics of LiPSs. Besides, the ultrathin carbon layer increases the reaction sites and accelerates the electrochemical reaction rate. The cell with the In2O3@C interlayer displays excellent reversibility and stability with a 0.029% capacity decay each cycle in 2000 cycles at 2C. In addition, the In2O3@C interlayer significantly improves the cell performance under high current (888.2 mA h g–1 at 2C and room temperature) and low temperature (1007.8 mA h g–1 at 0.1C and −20 °C) conditions.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
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.
研究领域:
材料科学
·
生物传感
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）