SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Yu Peng,Bei Cheng,Liuyang Zhang,Jingjing Liu,Jiaguo Yu
As we all know, formaldehyde (HCHO) is extremely harmful to human health and has been identified as a primary carcinogen by the World Health Organization. Therefore, there is an urgent need to design efficient formaldehyde-sensing materials. In this work, a highly responsive formaldehyde sensor of In 2 O 3 @ZnO derived from MIL-68(In)@ZIF-8 precursor was successfully prepared. By adjusting the ratio of In 2 O 3 and ZnO, it can be found that the performance of the resulting sensor has greatly improved under 100 ppm HCHO at an operating temperature of 220 °C and the detection limit can be as low as 4 ppb. Additionally, it also has excellent selectivity (Q≥10), anti-interference (the deviation value≤3.5%), and long-lasting stability (the variation value≤4%). Such distinguished sensing performance can be attributed to the metal-organic framework (MOF) derived step-scheme (S-scheme) heterojunction , which ultimately increases the adsorption of oxygen and HCHO. This work verifies that ingenious heterojunction construction can significantly improve gas sensing performance.
研究领域:
材料科学
·
环境科学
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DOI
高影响因子
SCRIPTA MATERIALIA
·
2019
·
IF 4.539
Jun Guo,Peng Qin,Zheng Ma,Qiong-Lian Yang,Jing Feng,Zhen-Hua Ge
A new approach was developed for enhancing the thermoelectric performance of In 2 O 3 (ZnO) 5 ceramics. Ni coating layer on the surface of In 2 O 3 (ZnO) 5 powders was prepared by chemical plating. The Ni-Coated In 2 O 3 (ZnO) 5 powders was densified to composite bulk with Ni enrichment in the grain boundaries. The composite sample obtained a remarkably enhanced dimensionless thermoelectric figure of merit (ZT) of 0.39 at 973 K, which is 3.6 times higher than that of a pristine In 2 O 3 (ZnO) 5 sample.
研究领域:
材料科学
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凝聚态物理
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功能陶瓷
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热电材料
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纳米复合材料
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 28
·期 1
·958-962
·
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
·
环境科学
·
传感器技术
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
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
·
化学工程
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Yumeng Liu,Jinniu Zhang,Gang Li,Jia Liu,Qingfei Liang,Hongjun Wang,Yuanyuan Zhu,Jianzhi Gao,Hongbing Lu
In 2 O 3 –ZnO nanotubes were prepared by a solvent thermal method using electrospun indium nitrate–polyvinyl pyrrolidone [In(NO 3 ) 3 –PVP] nanofibers as a sacrificial template. The sensing properties toward NO 2 of this kind of new emerging sensing material were explored. Compared with as-electrospun In 2 O 3 nanofibers, the In 2 O 3 –ZnO composite nanotubes exhibited higher responses and better selectivity to NO 2 . The response of the In 2 O 3 –ZnO nanotubes to 500 ppb NO 2 at room temperature (RT, 25 °C) under UV irradiation was as high as to 32.73, which was 3.33 times higher than that of the In 2 O 3 nanofibers. Moreover, even under a high relative humidity of 80%, the RT NO 2 response of the In 2 O 3 –ZnO composite nanotubes can still reach up to 3.50–500 ppb. The enhanced NO 2 sensing characteristics were mainly ascribed to the formation of In 2 O 3 –ZnO n–n heterojunctions , the enhanced light absorption, and the increased oxygen vacancy proportion. The results suggested that In 2 O 3 –ZnO nanotubes had good potential for the selective and sensitive detection of ppb-level NO 2 at RT.
研究领域:
材料科学
·
环境监测
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DOI
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Ying Li,Xiangyang Wei,Qingyuan Liu,Diming Zang,Rui You
The persistent challenge of poor recovery characteristics of NO2 sensors operated at room temperature remains significant. However, the development of In2O3-based gas sensing materials provides a promising approach to accelerate response and recovery for sub-ppm of NO2 detection at room temperature. Herein, we propose a simple two-step method to synthesize a one-dimensional (1D) In2O3@ZnO heterostructure material with hollow microtubes, by coupling metal–organic frameworks (MOFs) (MIL-68 (In)) and zinc ions. Meanwhile, the In2O3@ZnO composite-based gas sensor exhibits superior sensitivity performance to NO2 under visible light activation. The response value to 5 ppm of NO2 at room temperature is as high as 1800, which is 35 times higher than that of the pure In2O3-based sensor. Additionally, the gas sensor based on the In2O3@ZnO heterostructure demonstrates a significantly reduced response/recovery time of 30 s/67 s compared to the sensor based on pure In2O3 (74 s/235 s). The outstanding gas sensing properties of the In2O3@ZnO heterostructure-based sensors can be attributed to the enhanced photogenerated charge separation efficiency resulting from the heterostructure effect, and the improved receptor function toward NO2, which can increase the reactive sites and gas adsorption capacity. In summary, this work proposes a low-cost and efficient method to synthesize a 1D heterostructure material with microtube structures, which can serve as a fundamental technique for developing high-performance room-temperature gas sensors.
研究领域:
材料科学
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环境科学
·
化学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xingyu Kang,Jianhui Lv,Lei Han,Bin Huang,Huizhang Zhao,Dong Wang,Hairui Fang
Nitrogen oxide (NO 2 ) is common by-products of industrial production, posing significant health risks to workers. Therefore, real-time monitoring of NO 2 is crucial. In this study, innovative In 2 O 3 -ZnO nano-materials were prepared by combining In 2 O 3 with ZIF-8 via electrospinning, for detecting trace amounts of NO 2 at room temperature (RT). Compared to pure In 2 O 3 , the In 2 O 3 -ZnO nano-materials (V2) with a 10 % weight ratio of ZIF-8 exhibited a significantly higher response (389.99) and a faster response time (16.9 s) to NO 2 under ultraviolet (UV) irradiation at RT. The superior gas sensing performance of the V2 nano-materials is attributed to the formation of n-n heterojunctions, enhanced optical absorption, increased oxygen vacancy ratio, and excellent dispersion among the nano-materials. The results demonstrate that V2 nano-materials can detect NO 2 at parts-per-billion (ppb) levels at RT, making them suitable for monitoring trace amounts of NO 2 in open environments. Furthermore, a portable real-time NO 2 monitoring device was constructed using V2 as the sensing material, an LM358-based amplifier circuit for data acquisition, an STM32F103C8T6 microcontroller as the main control unit, and a buzzer as an alarm device. Compared to devices using a helical Ni-Cr wire as an indirect heat source, this integrated NO 2 detection device offers real-time alarms with lower energy consumption. This application not only enhances worker health and safety in industrial environments but also demonstrates higher energy efficiency in practical application.
研究领域:
材料科学
·
环境监测
·
传感器技术
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Bin Jiang,Tiantian Zhou,Ling Zhang,Wenjiang Han,Jiaqi Yang,Chong Wang,Yanfeng Sun,Fangmeng Liu,Peng Sun,Geyu Lu
The development of mesoporous heterogeneous structure through a facile and repeatable method with high gas sensing performance is always highly desirable in the chemical sensor field. Herein, the mesoporous In 2 O 3 -ZnO heterogeneous structure has been successfully synthesized via a reproducible hydrothermal method . The characterizations of sensing materials demonstrate that the porous heterogeneous structure can be easily constructed. Gas sensing investigation indicates that the gas sensor based on 15 at. % In 2 O 3 -ZnO exhibits the obvious enhanced ethanol gas sensing performances compared with that based on pure ZnO material in our previous work, including lower detection limit (200 ppb), lower base line resistance (∼ 1 Mohm), satisfying long term stability and improved moisture tolerance. The enhanced gas sensing properties can be mainly attributed to the In 2 O 3 -ZnO heterogeneous structure and unique microstructure, which will be deliberately discussed in the sensing mechanism part.
研究领域:
材料科学
·
化学传感器
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产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2019
·Vol. 48
·期 11
·7068-7075
·
IF 1.676
Li Shuhui,Zhou Ying,Cui Lijun,Ge Zhenhua,Feng Jing
In 2 O 3 (ZnO) k superlattice ceramics are promising oxide thermoelectric materials, as superlattice interfaces are effective in scattering phonons and filtering low-energy electrons to decrease thermal conductivity and improve the figure of merit ( ZT ) value. In this work, homologous compounds were prepared by solid-state reaction method using ZnO and In 2 O 3 as raw materials. Phase purity and crystal structure were characterized by x-ray diffraction, revealing that In 2 O 3 (ZnO) k crystallizes in an R3 m space group for odd k values and P6 3 /mmc for even k values. The study of thermoelectric (TE) properties showed that as k increased, the thickness of InO(ZnO)
+ 3
also increased, while the electrical conductivity, thermal conductivity, Seebeck coefficient, power factor and ZT value were all decreased. In 2 O 3 (ZnO) 3 samples obtained a maximum power factor of 651 μ W m −1 K −2 at 973 K, and also achieved a maximum ZT value of 0.24 at 973 K.
研究领域:
材料科学
·
凝聚态物理
·
能源转换技术
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Xiangfeng Meng,Wei Liu,Min Zhang,Teng Wang,Conghui Hao,Zhixin Zhang,Sijia Li,Xinyue Du,Junwei An
Rational construction of In 2 O 3 /ZnO n-n heterojunction hollow hexagonal structure nanotubes via MOF template strategy. • In 2 O 3 /ZnO sensor exhibits an ultrafast response of 1 s to TEA at a low operating temperature of 90 °C. • Compared with the pristine In 2 O 3 sensor, the In 2 O 3 /ZnO composite exhibits a 3.08-fold higher response toward TEA, with a limit of detection of 1 ppm. • The superior gas-sensing performance originates from the unique porous hollow structure of In 2 O 3 /ZnO and the n-n heterojunction constructed at the interface, which provides a promising strategy for the rapid low-temperature detection of TEA. Metal-organic frameworks (MOFs) have designed frame structures and excellent catalytic properties, which can effectively address practical application challenges of triethylamine (TEA) gas sensors. In this study, a hollow porous nanotube composite of In 2 O 3 /ZnO was synthesized using a solvothermal method with MOFs serving as sacrificial templates, and it was then utilized for low-temperature rapid detection of TEA. This composite material, characterized by a unique porous hollow structure and n-n heterojunction, boasts a high specific surface area and numerous active sites, resulting in outstanding gas sensitivity performance at lower operating temperatures. At the optimal operating temperature of 90 °C, the In 2 O 3 /ZnO-2 sensor exhibits a rapid response (1 s) to 200 ppm TEA, and its response value of 34.3 is 3.08 times that of the original In 2 O 3 sensor. In addition, this sensor also exhibits excellent selectivity, reproducibility, and moisture resistance. This experiment provides an effective solution for the rapid detection of TEA at low temperatures. The In 2 O 3 /ZnO sensor exhibits a response value of 34.3 toward 200 ppm TEA at a low operating temperature of 90 °C, with a response time as low as 1 s, as well as excellent selectivity, repeatability and long-term stability. The enhanced depletion layer induced by the n-n heterojunction and the unique hollow hexagonal structure are considered to be the key factors responsible for the improved gas-sensing performance of the composite. Download: Download high-res image (112KB) Download: Download full-size image
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产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 79
·49883-49889
·
IF 3.108
Li-Jun Cui,Zhen-Hua Ge,Peng Qin,Jing Feng
Thermoelectric (TE) materials have a promising application as they can interconvert thermal energy to electrical energy directly. Oxide TE materials have attracted more attention for this application due to their high temperature stability. In this work, In2O3(ZnO)5 intrinsic superlattice ceramics with a layered structure were synthesized by reaction sintering a mixed powder of In2O3 and ZnO at 1200 °C for different holding times (t = 6, 8, 10, 12 and 15 h) in air. Their thermoelectric properties including the electrical conductivity, Seebeck coefficient and thermal conductivity, were measured from 323 to 973 K. The thermoelectric properties depended on the holding time. The highest ZT value of 0.19 at 973 K was obtained for the sample with a 12 h holding time.
研究领域:
材料科学
·
热电学
·
陶瓷
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2019
·
IF 2.291
Lulu Huang,Jun Guo,Zhen-Hua Ge,Yehua Jiang,Jing Feng
The In 2 O 3 (ZnO) 3 + x mol%Ga 2 O 3 ( x = 0, 0.1, 0.3, 0.5, 1) ceramics were synthesized by a solid-state reaction process. The effect of Ga doping on the thermoelectric properties of the In 2 O 3 (ZnO) 3 ceramics was studied. The phase structure and microstructure of all the bulk samples were checked by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM), respectively. Additionally, the minimum thermal conductivity of 1.45 Wm −1 K −1 at 973 K is obtained for 0.5% Ga-doped sample, which is 35% lower than that of the pristine sample. The significantly decreased thermal conductivity for Ga 2 O 3 -doped sample is due to the enhanced scattering of phonons , which is derives from the point defects caused by Ga-doping and the introduction of the second phase. As a result, the In 2 O 3 (ZnO) 3 +0.5 mol% Ga 2 O 3 sample achieved the highest ZT value of 0.23 at 973 K.
研究领域:
材料科学
·
热电学
·
陶瓷
·
固态化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）