COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2023
·
IF 5.2
Sabarinathan Ravichandran,Narayanamoorthy Bhuvanendran,Shuhua Hao,Shirong Sun,Thandavarayan Maiyalagan,Huaneng Su,Xihong Zu,Wenli Zhang
This work shows that PANI-SnO 2 nanorods with unique morphology and fine distribution of Pd-Ni alloy nanoparticles exhibit superior electrocatalytic performance toward methanol oxidation reaction (MOR). The amount of Ni content in Pd x -Ni y /PANI-SnO 2 nanorods plays a key role in Pd utilization. Ni in Pd x -Ni y /PANI-SnO 2 catalyst significantly reduces the CO adsorption on the active catalyst surface and enhances the electrode kinetics . The Pd 3 Ni 1 /PANI-SnO 2 composite exhibits high mass activity (1861.9 mA mg −1 ) with extended stability even after 10000 cycles (∼90% retention) compared to other Pd x Ni y counterparts, Pd/PANI-SnO 2 , and commercial Pd/C catalysts. Interestingly, adding Ni along with SnO 2 improves the electronic effect of Pd metal, significantly enhancing its catalyst activity and stability. Based on the results, we hope the present work brings an innovative approach to constructing efficient and cost-effective electrocatalysts for electrooxidation methanol in an alkaline medium.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2023
·
IF 4
Xiang-Bing Li,Dan Wang,Cheng Gao,Xiao-le Zhao,Shuang Sun,Ying-ying Ren,Qian-qian Zhang,Jin-bing Zhang,Wen-qiang Dang,Yu-Xiang Zhao,Li-Jun Zhang,Yu-Ping Wang,Li-Min Zhao,Jian-Zhen An,Xue-Fu Kang,Wen-Bo Zhao,Qing Liu
The rough surface Fe 2 O 3 –SnO 2 composite nanorod material was prepared by electrostatic spinning. The morphology and nanostructure of Fe 2 O 3 –SnO 2 composite nanorods were characterized by scanning electron microscopy SEM , nitrogen physical adsorption and X-ray diffraction. Through the analysis of the test results, it can be shown that the Fe 2 O 3 –SnO 2 nanorod samples prepared in this experiment have the advantages of high purity, good crystallinity and large specific surface area. The specific surface area of the sample obtained from the test is 19.27 m 2 /g. According to the gas sensitivity test results of Fe 2 O 3 –SnO 2 nanorods, it can be seen that Fe 2 O 3 –SnO 2 samples have high responsiveness and excellent gas sensitivity selectivity . Various gases were tested in this experiment, and it was found that the sensor has good gas selectivity to isobutanol. At 310 °C, the sensor's response to 100 ppm isobutanol reached 13. This experiment not only prepared Fe 2 O 3 –SnO 2 nanorod sensor with good isobutanol gas sensitivity. And it realized the accurate measurement of continuous isobutanol concentration. In addition, the gas sensitivity mechanism of Fe 2 O 3 –SnO 2 nanomaterials was discussed.
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Xiao Xue,Hui Chen,Chongbo Zhang,Jiayu Li,Siwen Tao,Xinhua Tian,Ruiqin Gao,Meihong Fan,Ni Bai,Guo-Dong Li
n -butanol detection is crucial to environmental protection and mankind’s health because of its toxicity and irritation to the respiratory system. Mono-metal oxide semiconductors (such as SnO 2 ) often face disadvantages such as low sensitivity, insufficient selectivity, and a high detection limit. Constructing heterojunctions has been considered an efficient way to enhance the performance of MOS gas sensors. This work presents the synthesis of a series of β -CdSnO 3 -SnO 2 nanorod-like heterostructures with good n -butanol sensitivity using a hydrothermal and post-calcination approach. The optimized CSO/SO-8 shows the highest response value about 90–100 ppm n -butanol at 190 °C, which is 15 times greater than that of SnO 2 , and 6.5 times more than that of β -CdSnO 3 . Meanwhile, the CSO/SO-8 also exhibits a short response and recovery time (1–2 s/63 s). More importantly, the detection limit is reduced to ppb level (50 ppb). The improved gas-sensitive properties can be explained by the formation of n - n heterojunctions between β -CdSnO 3 and SnO 2 , which increases the content of chemisorbed oxygen, thus enhancing the performance of the gas-sensitive. Our work not only provides a material with n - n heterostructures but also the strategy for constructing heterojunctions to improve gas-sensitive properties.
研究领域:
材料科学
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环境科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2017
·Vol. 15
·期 3
·742-750
·
IF 1.048
Caihui Feng,Fei Teng,Yang Xu,Yajun Zhang,Tiehu Fan,Tingting Lin
In this work, pure and Au-nanoparticle-decorated SnO 2 nanorods were prepared via a one-step hydrothermal method combined with a facile deposition process, and then characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, high-resolution transmission electron microscopy, and X-ray photoelectron spectroscopy. The xylene-sensing performance of the nanorods was also investigated. The results show that Au nanoparticles with an average diameter of 4-6 nm were immobilized on the surface of rutile SnO 2 nanorods. As the amount of Au increased, the surface-adsorbed oxygen species gradually increased. The 12 mol% Au-SnO 2 nanorods exhibited the highest response to 50 ppm xylene, a lower operating temperature (279 to 255°C), favorable selectivity, and fast response-recovery speed (3 and 4 seconds, respectively). These properties made the fabricated nanorods good candidates for xylene detection. The possible mechanism for the enhanced xylene-sensing performance is discussed.
研究领域:
材料科学
·
传感器技术
·
纳米技术
✓ 已验证
DOI
高影响因子
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