SENSORS
·
2024
·Vol. 24
·期 6
·1824
·
IF 3.4
Yuan Qu,Haotian Zheng,Yuhua Lei,Ziwen Ding,Siqi Li,Song Liu,Wei Ji
Morphology and structure play a crucial role in influencing the performance of gas sensors. Hollow structures, in particular, not only increase the specific surface area of the material but also enhance the collision frequency of gases within the shell, and have been studied in depth in the field of gas sensing. Taking SnO2as an illustrative example, a dual-shell structure SnO2(D-SnO2) was prepared. D-SnO2@Polyaniline (PANI) (DSPx, x represents D-SnO2molar content) composites were synthesized via the in situ oxidative polymerization method, and simultaneously deposited onto a polyethylene terephthalate (PET) substrate to fabricate an electrode-free, flexible sensor. The impact of the SnO2content on the sensing performance of the DSPx-based sensor for NH3detection at room temperature was discussed. The results showed that the response of a 20 mol% D-SnO2@PANI (DSP20) sensor to 100 ppm NH3at room temperature is 37.92, which is 5.1 times higher than that of a pristine PANI sensor. Moreover, the DSP20 sensor demonstrated a rapid response and recovery rate at the concentration of 10 ppm NH3, with response and recovery times of 182 s and 86 s.
研究领域:
材料科学
·
纳米技术
·
气体传感
·
化学传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2020
·Vol. 126
·期 4
·1-10
·
IF 1.81
Chen Yu,Dong Zegang,Xue Xinxin,Chen Song,Natan Avi,Lv Yu,Chen Cheng,Yang Yinye,Cen Weifu,Yang Yang
Pure SnO 2 and La-doped SnO 2 nanocomposite were prepared through hydrothermal method, and their gas sensing performances were studied. Results indicate that the sensing response of the 5 wt% La-doped SnO 2 nanocomposite reached 29.5 when exposed to 75 ppm methanol at the optimal operating temperature of 220 °C, which was over seven times larger than that of pure SnO 2 nanoparticles. In addition, the response and recovery time were shortened to 12 s and 7 s, respectively. Moreover, the 5 wt% La-doped SnO 2 nanocomposite presents a good selectivity toward methanol among methanal, methanol, ammonia, acetone and benzene gases. The improvement in the gas sensing properties of the 5 wt% La-doped SnO 2 nanocomposite toward methanol can be attributed to the smaller crystallite size, larger surface area and the modified chemical nature of nanocomposite surface.
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
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Qinghua Tian,Lingxiangyu Li,Li Yang,Jizhang Chen,Shin-ichi Hirano
With a much higher theoretical capacity than that of graphite anodes, SnO 2 has attained great attention as a potential anode material for next-generation lithium-ion batteries. However, it's practical application yet be impeded by such disadvantages of poor conductivity and terrible structure stability during repeated discharge/charge process. Herein, a unique TiO 2 /SnO 2 /C hybrid (TiO 2 SS@SnO 2 @C) consist of one-dimensional TiO 2 nanobelts , zero-dimensional SnO 2 nanoparticles and conformal carbon coating has been fabricated based on a strategy of synergistic effect of components with different dimensional nanostructures , which can provide improved electrochemical kinetic and outstanding structure stability for the TiO 2 SS@SnO 2 @C. As a result, the TiO 2 SS@SnO 2 @C is able to exhibit outstanding lithium storage performance as an anode material, delivering capacities of 904.9 and 492.4 mAhh g −1 after even 400 cycles at 200 and even 1000 mA g −1 , respectively. It is demonstrated that the synergistic effect of these components is responsible for thus outstanding electrochemical performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Hao Shan,Changbai Liu,Li Liu,Jinbao Zhang,Haiying Li,Zhen Liu,Xiaobo Zhang,Xiaoqing Bo,Xiao Chi
SnO2–Fe2O3 interconnected nanotubes were obtained by combining the single nozzle electrospinning and thermal treatment methods. The results of scanning electron microscopy revealed the special structure of ruptures and interconnected nanotubes in the as-prepared materials. The toluene sensing test results of SnO2–Fe2O3 interconnected nanotubes show that SnO2–Fe2O3 interconnected nanotubes possess excellent toluene gas-sensing properties. The sensitivity of detecting limit (50 ppb) is 2.0 at the optimum operating temperature of 260 °C. The response and recovery times to 1 ppm toluene are about 5 and 11 s, respectively. Moreover, the SnO2–Fe2O3 interconnected nanotube gas sensors exhibit the remarkable selectivity to toluene, and good long-term stability.
研究领域:
材料科学
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysts
·
2022
·Vol. 12
·期 7
·719
·
IF 4.501
Hong-Juan Qin,Yu-Hang Zhang,Zhen Wang,Gui-Hua Yang
Photocatalysis provides a prospective approach for achieving high-value products under mild conditions. To realize this, constructing a selective, low-cost and environmentally friendly photocatalyst is the most critical factor. In this study, BiOBr/Zn@SnO2is fabricated by a one-pot hydrothermal synthesis method and BiOBr: SnO2ratio is 3:1; this material is applied as photocatalyst in fructose selective conversion to lactic acid. The bandgap structure can be regulated via two-step modification, which includes Zn doping SnO2and Zn@SnO2coupling BiOBr. The photocatalyst shows excellent conversion efficiency in fructose and high selectivity in lactic acid generation under alkaline conditions. The conversion rate is almost 100%, and the lactic acid yield is 79.6% under optimal reaction conditions. The catalyst is highly sustainable in reusability; the lactic acid yield can reach 67.4% after five runs. The possible reaction mechanism is also proposed to disclose the photocatalysis processes.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Naibo Gao,Hua-Yao Li,Wenhui Zhang,Yuzhu Zhang,Yi Zeng,Hu Zhixiang,Jingyao Liu,Jianjun Jiang,Ling Miao,Fei Yi,Huan Liu
In this paper, a quartz crystal microbalance (QCM)-based humidity sensor has been fabricated by colloidal tin oxide (SnO 2 ) nanowires. The SnO 2 nanowires were synthesized via a colloidal process that employing SnCl 4 ethanol solutions mixed with oleic acid (OA) and oleylamine (OLA). The spin-coating method was chosen to deposit the sensitive film at room temperature without high-temperature sintering. Furthermore, the Cu(NO 3 ) 2 methanol solution was used to remove the organic long chains coated on the surface of the colloidal SnO 2 nanowires and expose more adsorption sites. The characterizations of the material were studied by means of FTIR, XRD, and FE-SEM. The saturated salt solution method was used to investigate the humidity sensing performance (response, recovery, repeatability, etc.) of the QCM sensor in the range of 11%–97%. The results showed that the sample with 12 h synthesis has the best humidity response. This may be attributed to the larger specific surface area which makes the material provide more adsorption sites for water molecules, and more (110) planes formed which could absorb more water molecules proved by the Density Functional Theory (DFT) calculation.
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
·
2022
·
IF 9.221
Xiaoning Meng,Mingshu Bi,Qiuping Xiao,Wei Gao
With the emergence of hydrogen economy worldwide and the increase of safety problems caused by the highly flammable and explosive characteristics of hydrogen (H 2 ), it is urgent to develop the portable sensors that can sensitively and quickly detect H 2 leaks. In this work, the H 2 sensing characteristics of Pd/SnS 2 /SnO 2 nanocomposites synthesized via hydrothermal route as well as impregnation route were systematically investigated for the first time. The influence of different SnS 2 and Pd loading on the H 2 sensing performances of SnO 2 nanoparticles was revealed by varying the addition levels of thiourea and palladium chloride. The H 2 sensing experimental results demonstrated that SnS 2 and Pd modification can greatly enhance the sensing capabilities of SnO 2 , where 1.0 at% Pd/SnS 2 /SnO 2 sensor exhibited high response (95) and rapid response/recovery time (1/9 s) to 500 ppm H 2 at 300 ℃, thus outperforming the current reported sensing performances of SnO 2 -based H 2 sensors. The superior sensing characteristics of Pd/SnS 2 /SnO 2 were attributed to the simultaneous synergistic effect of the three components. This study will supply a rational strategy for designing high sensitive and rapid response H 2 sensors.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Longjun Guo,Wei Liu,Chunqing Wang
Nanoscale Ag-decorated CuO/SnO2 heterojunctions with coralloid hollow porous structure (ACSO HPs) were successfully synthesized though a hydrothermal route with electroless Ag plating followed by the calcination and acid-washing. Detailed microstructural characterizations confirmed that the hollow porous structure comprised CuO/SnO2 and Ag/SnO2 nanoheterojunctions, and the SnO2 surface was decorated primarily with nano-Ag, which was the outer layer of the structure. The ACSO HPs sensor displayed a higher response to isopropanol compared to toluene, acetone, benzene, ethanol, and methanol than other samples. For 100 ppm isopropanol, the ACSO sensor exhibited a faster response time (6 s) and a higher recovery time (34 s) than undecorated Ag samples. The improved sensing performance of ACSO samples was ascribed to the synergistic effect of the CuO/SnO2 nanoheterojunctions with the dramatic sensitization of the decorated nano-Ag, as well as the HPs.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Guoan Qi,Yong Zeng,Jimin Chen
Porous tin oxide-based (SnO 2 -based) ceramics with lattice structures were prepared by digital light processing (DLP) 3D printing technology. A 57 wt% SnO 2 -based DLP slurry was prepared by rheological experiments. By optimizing the exposure time, the DLP process for preparing SnO 2 based ceramics had better molding accuracy. The printing size error could be controlled at about 1.8%. The degreasing and sintering curves were obtained by thermogravimetric-differential scanning calorimetry (TG-DSC) analysis, and the SnO 2 -based porous ceramics with porosity of 50%–71% were prepared. The SnO 2 -based ceramics with high densification could be obtained by sintering at 1300 °C for 2 h. The relative density of printed SnO 2 -based ceramics was about 92%. In this paper, zinc oxide (ZnO) was selected as a sintering additive to promote the densification of SnO 2 ceramics. According to the characterization methods of scanning electron microscopy(SEM), X-ray diffraction(XRD), Energy dispersive spectrometer (EDS) and relative density, the optimum doping amount of ZnO was 9 wt%. The influence of pore structure on compressive strength was analyzed by finite element simulation and compressive test. The compressive strength of porous ceramics could be reduced from 1.56 MPa to 0.27 MPa by controlling the porosity of the porous lattice from 50% to 71%. The compressive strength of the solid block was 160 MPa. In this study, the porous SnO 2 -based ceramics prepared can be used in porous electrodes, lithium-ion batteries, supercapacitors , catalysts, sensors and other fields in the future.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Functional Materials Letters
·
2020
·
IF 2
Ang Liao,Yong Pan,Weixin Lei,Zhenya Luo,Jiaqing Hu,Junan Pan,Juanjuan Cheng
As the anode of sodium-ion batteries (SIBs), SnO 2 has been attracted considerable attention due to its high theoretical specific capacity. However, these shortcomings of SnO 2 anode seriously restrict its practical use for high-performance SIBs due to its poor conductivity, volume expansion and agglomeration of the active material during cycling. In this paper, carbon aerogel (CA) is a three-dimensional porous material with glucose as carbon source and freeze-dried hydrogel method is used to retain three-dimensional network structure by calcination. SnO 2 is prepared by hydrothermal method with nanoparticles and distributed on the CA homogeneously to prepare CA/SnO 2 . The CA/SnO 2 is prepared for SIB, in which CA can alleviate the problem of volume expansion and improve poor conductivity of SnO 2 as a good carrier. Moreover, the porous structure of CA is beneficial to increase the contact between the electrolyte and the electrode, and accelerates the transmission speed of ions and electrons. Nano-sized SnO 2 also contributes to cycle stability. The CA/SnO 2 exhibits superior electrochemical performance and maintains a reversible discharge specific capacity of 235 mAh g − 1 at a current density of 50 mA g − 1 after 100 cycles.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2015
·Vol. 212
·期 8
·1789-1794
·
IF 1.616
Chengnan Wang,Pei Zhao,Shantang Liu
SnO 2 hollow nanospheres (SnO 2 HNs) and different amount of PdO-doped SnO 2 HNs were successfully synthesized and applied to fabricate sensors for CO detection. The synthesized SnO 2 and PdO/SnO 2 materials have tetragonal and HN structure with a diameter of ∼180 nm, and the existence of Pd element is revealed by EDS and XPS. In addition, the sensors based on the pristine SnO 2 and Pd-loaded SnO 2 HNs were investigated for CO sensing properties. The experiment results indicated that materials of the best doping ratio is 1 mol%, because 1 mol% PdO/SnO 2 HN sensor had a lower optimized operating temperature (150 °C) and exhibited more excellent sensitivity than the other sensors for the detection of CO. Furthermore, the response value of 1 mol% PdO/SnO 2 HN sensor presented a linear relationship with CO concentration in the range 20–500 ppm CO at 150 °C. Meanwhile, 1 mol% PdO/SnO 2 HN sensor exhibited a remarkable selectivity to CO against volatile organic compounds. These results demonstrated that 1 mol% PdO/SnO 2 HNs are promising materials for application as a CO gas sensor when its working temperature is 150 °C. Comparison of PdO/SnO 2 hollow nanospheres with various amount of Pd loading for 200 ppm CO detection at different temperatures.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Jing Zhou,Xintong Zhang,Hanbo Chen,Zheqing Tang,Dan Meng,Kailin Chi,Yongmao Cai,Gengxin Song,Yu Cao,Ziyang Hu
The electron transport layer (ETL) of Sb 2 Se 3 thin film solar cells is not only responsible for electron extraction and transport but also manipulates the orientation of the Sb 2 Se 3 photoactive layer’s growth, which is crucial for performance optimization. In this study, the dual functionality of solution-processed SnO 2 film treated with CdCl 2 was achieved as the ETL in Sb 2 Se 3 solar cells. The CdCl 2 treatment simultaneously improves the efficacy of the SnO 2 ETL and induces the longitudinal growth of Sb 2 Se 3 grains. These two aspects effectively enhance electron transport and/or extraction, thereby reducing the charge recombination, which contributes to the improvement of all device parameters. The results demonstrate that CdCl 2 treatment optimizes the interface properties of the SnO 2 ETL, providing a facile and effective method for enhancing the performance of the Sb 2 Se 3 solar cell.
研究领域:
材料科学
·
光伏技术
✓ 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）