JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2014
·Vol. 14
·期 5
·3653-3657
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IF 1.339
Liu Juan,Li Wei,Zhu Linghui,Li Chao,Qu Fengdong,Guo Wenbin,Feng Caihui,Ruan Shengping
In this paper, In2O3 nanotubes were prepared by an electrospinning method combined with an oriented-contract calcinations scheme, and characterized by differential thermal and thermal gravimetric analyzer (DTA-TGA), X-ray diffraction (XRD), and scanning electron
microscopy (SEM). Ethanol sensing properties of the as-prepared nanotubes were investigated. The results showed that the In2O3 nanotubes were obtained at a fast heating rate of 100 °C/min. Ethanol sensing properties indicated that the nanotubes exhibit a high response
of 87.5 to 500 ppm ethanol, fast response (20 s) and recovery (18 s) rate at the optimal operating temperature of 260 °C. Moreover, the nanotubes also exhibit good selectivity.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2016
·
IF 1.86
Xuesong Wang,Jinbao Zhang,Yue He,Lianyuan Wang,Li Liu,Han Wang,Xuexin Guo,Hongwei Lian
Pure and Nd-doped porous In 2 O 3 nanotubes have been successfully synthesized by single-capillary electrospinning method. The SEM images displays the novel structure of Nd-doped In 2 O 3 which has pores distributed on the surface of nanotubes. The subsequent test results demonstrate that Nd-doped porous In 2 O 3 nanotubes possess excellent gas-sensing properties to formaldehyde. The response of Nd-doped porous In 2 O 3 nanotubes to 100 ppm formaldehyde is 44.6 at the optimum operating temperature of 240 °C, which is 3.6 times larger than that of pure porous In 2 O 3 nanotubes (12.5), and the response and recovery times to 100 ppm formaldehyde are 15 and 50 s, respectively.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Intelligent Systems
·
2022
·Vol. 4
·期 12
·2200169
·
IF 7.298
Wenjie Ren,Changhui Zhao,Gaoqiang Niu,Yi Zhuang,Fei Wang
Artificial senses like electronic nose, which ameliorates the problem of poor selectivity from single gas sensor, have elicited keen research interest to monitor hazardous gases. Herein, the doping effects of gallium on In 2 O 3 nanotubes (NTs) are investigated and a four-component sensor array for the detection of trimethylamine (TMA) is reported. All-gallium-doped/alloyed In 2 O 3 (Ga-In 2 O 3 ) sensors show improved sensitivity and selectivity to TMA at an operating temperature of 240 °C, with 5 mol% Ga-doped/alloyed one displaying the highest response in the range of 0.5–100 ppm and the lowest detection limit of 13.83 ppb. Based on the gas-sensing properties, a four-component sensor array is fabricated, which shows unique response patterns in variable-gas backgrounds. Herein, back propagation neural network (BPNN), radial basis function neural network (RBFNN), and principal component analysis-based linear regression (PCA-LR) are trained with the gas-sensing data to discriminate different gases with high accuracy, as well as to predict the concentrations of target gases in different gases and gas mixtures. Furthermore, accuracies of 92.85% and 99.14% can be achieved for the classification of six gases (three single gases and three binary gas mixtures) and for the prediction of TMA concentrations in the presence of different concentrations of TMA and acetone, respectively.
研究领域:
材料科学
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电子工程
·
化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2016
·Vol. 27
·期 5
·5153-5157
·
IF 1.798
Liu Lili,Li Shouchun,Guo Xin,Wang Lianyuan,Liu Li,Wang Xuesong
It has been reported a lot that nanowire and nanotube semiconductor oxide type sensor possess excellent sensing property. Many works ascribed excellent sensing properties to the big specific surface area. Herein, In 2 O 3 nanofiber and nanotube were synthesized by single nozzle electrospinning and followed by calcination with different heating rate. And the samples were characterized by scanning electron microscopy, and powder X-ray diffraction. Their gas sensing properties were studied to investigate the advantages of their morphologies, and the response and recovery dynamic curves were also tested to investigate their gas sensitive characteristics. The results show that acetone sensing sensitivity based on nanotubes is better than that of nanowires.
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2014
·
IF 1.761
Xiao Chi,Changbai Liu,Yu Li,Haiying Li,Li Liu,Xiaoqing Bo,Lili Liu,Chang Su
Pristine In 2 O 3 and ZnO–In 2 O 3 composited nanotubes were synthesized by the electrospinning technic and followed by calcination . The formation of ZnO–In 2 O 3 n–n heterojunctions was found to be highly sensitive to acetone gas. X-ray powder diffraction (XRD), Scanning electron microscope (SEM) and energy dispersive X-ray spectrometry (EDS) were respectively used to characterize surface crystallinity and morphology. The possible mechanism of nanotubes formation was also investigated. Gas sensors were made based on the as-synthesized materials to investigate their gas sensing properties. Compare with the pristine In 2 O 3 nanotubes, ZnO–In 2 O 3 composite nanotubes show the obviously improved of acetone sensitivity. The sensitivity of ZnO–In 2 O 3 composite nanotubes is about 43.2, which is about triple times larger than that of the pristine In 2 O 3 nanotubes to 60 ppm acetone at 280 °C. The response and recovery times of ZnO–In 2 O 3 nanotubes to 60 ppm acetone are about 5 and 25 s. In addition, ZnO–In 2 O 3 composite nanotubes sensor also possesses a good selectivity to acetone.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 20
·18362-18373
·
IF 2.195
Zeng Xiangan,Li Shuo,He Yue,Zhao Bing,Ju Xiangnan,Chen Wenbin,Lu Bingliang,Li Haiying,Li Yu,Liu Li,Zhang Jianxia
With the increasing demand for high-performance sensors, gas-sensing materials are recognized as one of the core components of gas sensors. Therefore, the development of gas-sensing materials with excellent gas-sensing properties is of great significance. To meet this requirement, we aim to synthesize high-performance 1D gas-sensing materials with new morphologies. In this work, pearl-necklace-shaped In 2 O 3 nanotubes (PINTs) were successfully synthesized by a single-nozzle electrostatic spinning method followed by calcination. The nanostructure and formaldehyde gas-sensing properties of PINTs were compared with those of In 2 O 3 nanotubes (INTs) and In 2 O 3 nanofibres (INFs), and the morphologies and phases of PINTs were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). The SEM images clearly show that PINTs have a unique tubular structure that looks like a string of pearls. The formaldehyde gas-sensing characteristics of the sensors based on INFs, INTs and PINTs were investigated. All gas sensitivity measurements were performed at an optimum operating temperature of 220 °C. The results revealed that the sensors based on PINTs showed the greatest response to formaldehyde gas (38.3/100 ppm) compared with the sensors based on INTs (18.5/100 ppm) and INFs (9.0/100 ppm). Sensors with PINTs were found to have shorter response and recovery times (6 s and 16 s) than those of INTs (8 s and 22 s) and INFs (8 s and 27 s). The enhanced gas-sensing properties may be attributed to the novel nanostructure of PINTs. Furthermore, the sensors based on PINTs have good linearity, stability, repeatability and selectivity. These properties make PINTs ideal gas-sensing materials for use in sensors for formaldehyde detection.
研究领域:
材料科学
·
传感器技术
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环境监测
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Rui Zhao,Juexiu Li,Kajia Wei,Xinrui Lei,Yang Li,Yue Liu,Weijin Gong,Jingjing Lv,Jinping Jia
Photo-Fenton-like process is effective towards refractory organics removal for its strong oxidation capacity. Herein, cobalt-doped indium oxide (Co-In 2 O 3 ) with nanotube morphology was prepared and was taken as photo-Fenton-like catalyst. In the presence of peroxymonosulfate (PMS), Co-In 2 O 3 nanotubes exhibited excellent photo-Fenton-like activity with tetracycline hydrochloride (TC-HCl) degradation of 98.8 % in 40 min. The visible light driving Co-In 2 O 3 /PMS system showed the reaction rate constants of 0.0998 min −1 , which was 6 folds of the In 2 O 3 /PMS/vis system. Experimental results combining with theoretical chemical calculation demonstrated that the doping of Co can effectively reduce the band gap of In 2 O 3 , thus leading to stronger visible light absorption capability. The presence of oxygen vacancies (OVs) disrupted the symmetry and integrity of the catalyst structure and achieved electron enrichment at the reactive site. Simultaneously, Co doping and an appropriate amount of OVs strengthened chemisorption for PMS (from −0.652 eV to −4.224 eV) and higher electron density difference (from 0.49 e – to 0.68 e − ). Our findings provide insight on the contribution role of cobalt doping and OVs in improving photo-Fenton-like catalytic efficiency.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 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）