RSC Advances
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2016
·Vol. 6
·期 85
·81809-81813
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IF 3.289
Menghu Wang,Hang Ping,Hao Xie,Baoli Chen,Min Yan,Weijian Fang,Zhengyi Fu
A genetically modified bacterial surface not only serves as a confined environment for controlling the monodispersity of particle size, but also provides a carbon source in situ. The carbon coated SnO2 composite exhibits good lithium storage properties as an anode electrode, which are due to the ultrasmall size of the particles, the carbon coating and mesoporous structure.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2015
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IF 4.529
Bo Yang,Chaojin Jiang,Gang Yu,Qiongfang Zhuo,Shubo Deng,Jinhua Wu,Hong Zhang
The novel F-doped Ti/SnO 2 electrode prepared by SnF 4 as the single-source precursor was used for electrochemical degradation of aqueous perfluorooctanoic acid (PFOA). Higher oxidation reactivity and significantly longer service life were achieved for Ti/SnO 2 –F electrode than Ti/SnO 2 – X ( X = Cl, Br, I, or Sb) electrode, which could decomposed over 99% of PFOA (50 mL of 100 mg L −1 ) within 30-min electrolysis. The property of Ti/SnO 2 –F electrode and its electrooxidation mechanism were investigated by XRD, SEM–EDX, EIS, LSV, and interfacial resistance measurements. We propose that the similar ionic radii of F and O as well as strong electronegativity of F caused its electrochemical stability with high oxygen evolution potential (OEP) and smooth surface to generate weakly adsorbed OH. The preparation conditions of electrode were also optimized including F doping amount, calcination temperature, and dip coating times, which revealed the formation process of electrode. Additionally, the major mineralization product, F − , and low concentration of shorter chain perfluorocarboxylic acids (PFCAs) were detected in solution. So the reaction pathway of PFOA electrooxidation was proposed by intermediate analysis. These results demonstrate that Ti/SnO 2 –F electrode is promising for highly efficient treatment of PFOA in wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
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2018
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IF 2.873
Xing Liu,Yunhong Jiang,Kefeng Li,Fu Xu,Ping Zhang,Yanhuai Ding
Electrochemically active SnO 2 materials are prospective alternatives for graphite toward better flexible LIBs. However, significant volume changes and structural pulverization restrict the cycling stability and high capacity of SnO 2 . Here, we report a binder and conductive additive free core-shell N-doped carbon @SnO 2 hybrid paper by a subtle coaxial-electrospinning method. Core-shell N-doped C@SnO 2 fibers not only offer rapid ionic transport and sufficient buffer space for the volume expansion during the Li insertion and extraction reactions, but also enable high flexibility against both compression and bending deformation. As an anode for LIBs, the hybrid materials delivered a large initial capacity of 1799 mAhg −1 with capacity retention of 729 mAhg −1 after 100 cycles at a current rate of 390.5 mAg −1 . More importantly, flexible N-doped C@SnO 2 fabrics exhibit excellent electrochemical performance even after a rough treatment, suggesting a facile strategy for the fabrication of electrochemically stable electrodes for flexible LIBs.
研究领域:
材料科学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Lulu Guo,Zhen Shen,Chunhui Ma,Chunqiang Ma,Jiaqi Wang,Tingxun Yuan
The development of high response, low detection limit and low-cost acetone sensors remains a great challenge so far. In this work, the high-performance acetone sensors based on Au nanoparticles (NPs)-loaded SnO 2 porous nanosheets were successfully synthesized via metal-organic frameworks (MOFs) template method, which synthesis method is facile and meets the requirements of large-scale production. The acetone sensing characteristics of pristine SnO 2 and Au-SnO 2 -based sensors are investigated. The optimized Au-SnO 2 -based sensor exhibits high response to acetone (R a /R g = 18.2 @100 ppm at 240 °C) with high selectivity and fast response/recovery time compared with that of pristine SnO 2 . Importantly, a fully reversible resistance signal with a low acetone concentration (1 ppm) can be detected, and the theoretical detection limit of the sensor is as low as 40 ppb. Finally, the enhanced acetone sensing performance of the Au-SnO 2 sensor can be attributed to the increased specific surface area and chemically adsorbed oxygen, as well as the formation of Schottky junction between the Au and SnO 2 interfaces.
研究领域:
材料科学
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化学传感器
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纳米技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2020
·
IF 3.83
Yanling Li,Shengchang Wang,Junke Wu,Jinfu Ma,Lihua Cui,Hui Lu,Zhilin Sheng
We successfully synthesized a novel core-shell hybrid metal oxide via a simple one-step hydrothermal method without annealing. This composite of Co 3 O 4 particles covered with SnO 2 –SnO (Co 3 O 4 @SnO 2 –SnO) predicted better performance compared to pure Co 3 O 4 , which strongly depends on the synthetic temperature. The Co 3 O 4 @SnO 2 –SnO prepared at a temperature of 250 °C (labeled Co 3 O 4 @SnO 2 –SnO-250) exhibited an outstanding specific capacitance of 325 F g −1 under the current density of 1 A g −1 , which was much higher than those of Co 3 O 4 (12.6 F g −1 ) and other composites. Additionally, the sample also exhibited good cycle stability performance with a retention rate of 100% after 5000 cycles at a current density of 5 A g −1 . Through X-ray photoelectron spectroscopy analysis, the presumed mechanism was that Sn-O x decreases the surface electron densities of Co 3 O 4 , which is beneficial to OH − adsorption and specific capacitance improvement, and the synthetic temperature had a strong impact on the microstructure and thus on the surface electron densities. The most. obvious finding to emerge from this study is that the specific capacitance can be improved through adjusting the surface electron densities of transition metal oxides .
研究领域:
材料科学
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能源存储
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Guoan Qi,Haihua Yao,Yong Zeng,Jimin Chen
In this study, highly loaded tin oxide-based (SnO 2 -based) porous electrodes were prepared by digital light processing (DLP) 3D printing technology. Firstly, the SnO 2 light-cured slurry was prepared. The curing process and heat treatment process were analyzed and optimized. Then the best process parameters were obtained. Antimony oxide (Sb 2 O 3 ) was selected as the conductive agent to improve the electrical conductivity of the SnO 2 -based electrode. Through the characterization of resistivity, SEM and XRD , the optimum doping amount of conductive agent Sb 2 O 3 was determined to be 6 wt. %. Three kinds of porous electrodes with different shapes were prepared by DLP 3D printing, and the printing accuracy and mechanical properties were characterized. The results showed that the forming dimension error was about 1.7 % in the X and Y direction, 2.3 % in the Z direction. And the average compressive strength was 18.1 MPa, which effectively ensured the shape integrity and mechanical stability of the printed parts. Then the electrochemical properties of DLP 3D printed SnO 2 -based electrode and conventional coated electrode were tested and compared. The results showed that the 3D printed porous electrode showed lower charge transfer impedance and higher ion diffusion efficiency, and the maximum charge transfer impedance could be reduced to 1/25 of the traditional electrode; At the same time, it showed better cycle performance and rate performance, and the capacity retention of the 3D printed porous electrode could be improved by about 29.0 % compared with the traditional electrode. This work shows that high-performance high-load porous electrodes can be accurately prepared by DLP 3D printing, which provides a new strategy for the future development of high-load thick electrodes.
研究领域:
材料科学
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能源技术
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高影响因子
Catalysts
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2022
·Vol. 12
·期 6
·596
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IF 4.501
Silun Zhu,Shuying Shi,Xinhua Zheng,Xinqiang Wang,Gang Yu,Yonggang Jiang,Jian Feng,Luyi Zhu,Guanghui Zhang
In this paper, cerium was incorporated into polyhydroxyltriacetictin (PHTES) using the sol-gel method combined with electrospinning technology to prepare a series of composite oxide fiber catalysts SnxCe1−xO2in different proportions. The structures and soot catalytic activities of SnxCe1−xO2fibers were studied under loose contact conditions. When Ce entered the crystal lattice of SnO2, the structural symmetry of the SnO2was destroyed, which inhibited the crystallization and grain growth of the fiber, and fiber catalysts with a larger specific surface area were obtained. Moreover, the introduction of Ce improved the number of oxygen vacancies and redox ability of the catalyst, thus promoting the catalytic activity of the catalyst for soot particles. In particular, among them, the Sn0.7Ce0.3O2fiber catalysts had the strongest catalytic oxidation ability regarding soot particles and could oxidize soot particles at a lower temperature and faster catalytic rate. The results of the temperature-programmed oxidation of Sn0.7Ce0.3O2fiber catalyst, conducted three times under the same conditions, were basically consistent, indicating that the experimental results are reliable and repeatable. In addition, the Sn0.7Ce0.3O2fiber catalyst showed good cycle stability.Keywords:electrospinning;SnxCe1−xO2fiber catalyst;soot combustion
研究领域:
材料科学
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环境催化
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DOI
高影响因子
IONICS
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2022
·Vol. 29
·期 3
·1149-1157
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IF 2.961
Zeng Panjing,Zhang Chaomin,Ding Mengzhao,Huang Yuchen,Luo Menghao
The slow reaction kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) during the charging and discharging process result in inferior cycle life and low-energy conversion efficiency of commercial zinc-air batteries (ZABs). Stannic oxide (SnO 2 ) has received increasing attention for its unique advantages such as low cost, good stability, and high catalytic activity. In present work, mesoporous nanosphere carbon@stannic oxide (C@SnO 2 ) core–shell structures with C as the inner layer and SnO 2 as the outer shell are successfully prepared. When C@SnO 2 serves as the cathode for ZABs, its specific surface area (245 m 2 g −1 ) provides amounts of chemically active sites for ORR and OER. Similarly, carbon can not only increase the electrical conductivity of electrocatalyst, but also act as a support body for the core–shell structure which gives the material a robust structure and distinctive morphology. When C@SnO 2 are employed as cathode in ZABs, it exhibits excellent electrocatalytic activity with half-wave potential (0.88 V) for ORR and onset potential (1.45 V) for OER. In addition, it shows a superior charging-discharging cycle stability. This work offers an insight for the selection and preparation of high-performance electrocatalysts.
研究领域:
材料科学
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能源化学
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2021
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IF 7.46
Zhanjia Kang,Dongzhi Zhang,Tingting Li,Xiaohua Liu,Xiaoshuang Song
This paper introduces a quartz crystal microbalance sensor (QCM) based on SnO 2 NFs/PDA composite with multi-layer stacked fiber nanostructure, which possesses high sensitivity and selectivity to formaldehyde gas. SnO 2 NFs/PDA composite was synthesized via electrospinning and further oxidative polymerization. The morphology and chemical compositions of the as-prepared composite nanomaterials were confirmed by a series of material characterization technologies. The QCM sensor based on SnO 2 NFs/PDA nanomaterials exhibited excellent sensing characteristics over a wide range of formaldehyde concentration (0.5 − 50 ppm), such as high sensitivity (12.2 Hz/ppm), short response/recovery times (25 s/38 s), high linearity and selectivity. The frequency shift characteristics and electrical parameters of the prepared sensors were confirmed by impedance analysis. The adsorption mechanism of formaldehyde gas could be attributed to hydrogen bonding and the combination of aldehyde ammonia Schiff base interactions. This work indicated that SnO 2 NFs/PDA based QCM possessed great potential in actual formaldehyde sensing, which provided a feasible solution for designing highly sensitive and selective formaldehyde sensor.
研究领域:
材料科学
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环境监测
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传感器技术
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DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2023
·
IF 7.2
Junyu Wang,Mengjie Feng,Shuozhen Hu,Xinsheng Zhang
Although palladium (Pd) based materials are considered the best catalyst for formic acid oxidation reaction (FAOR), they are still confronted with a lot of barriers, such as the growth/sintering of Pd nanoparticles (NPs) and the accumulation of adsorbed poisoning intermediates. Herein, tin dioxide (SnO 2 ) decorated carbon black was utilized as the catalyst carrier to synthesize Pd/SnO 2 /C for FAOR. The introduction of SnO 2 significantly reduced the particle size of Pd NPs and forming the Pd–O–Sn structure. Compared with Pd/C, Pd/SnO 2 /C owned higher concentration of O ads and less adsorption amount of poisoning intermediates. The oxygen atoms adsorbed on Pd surface were rapidly transferred to SnO 2 due to the spillover effect. The FAOR reaction kinetic results showed that the introduction of SnO 2 accelerated the diffusion rate of formic acid on the electrode surface . Pd/SnO 2 /C exhibited high specific activity (5.97 mA cm −2 ), excellent durability, and high anti-CO poisoning ability toward FAOR due to the introduction of SnO 2 .
研究领域:
材料科学
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电化学
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DOI
高影响因子
Acta Biomaterialia
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2023
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IF 9.7
Jingpi Gao,Yangyang Yan,Shegan Gao,Heying Li,Xiantao Lin,Ji Cheng,Yan Hu,Kaiyong Cai,Xiaozhi Zhang,Jinghua Li
Wound infections caused by drug-resistant bacteria pose a great threat to human health, and the development of non-drug-resistant antibacterial approaches has become a research priority. In this study, we developed Cu 2 O-SnO 2 doped polydopamine (CSPDA) triple cubic antibacterial nanoenzymes with high photothermal conversion efficiency and good Fenton-like catalase performance. CSPDA antibacterial nanoplatform can catalyze the generation of hydroxyl radical (·OH) from H 2 O 2 at low concentration (50 μg∙mL −1 ) under 808 nm near-infrared (NIR) irradiation to achieve a combined photothermal therapy (PTT) and chemodynamic therapy (CDT). And the CSPDA antibacterial nanoplatform displays broad-spectrum and long-lasting antibacterial effects against both Gram-negative Escherichia coli (100 %) and Gram-positive Staphylococcus aureus (100 %) in vitro . Moreover, in a mouse wound model with mixed bacterial infection, the nanoplatform demonstrates a significant in vivo bactericidal effect while remaining good cytocompatible. To conclude, this study successfully develops an efficient and long-lasting bacterial infection treatment system. This system provided different options for future studies on the design of synergistic antimicrobial therapy. Hence, the as-synthesized synergetic photothermal therapy and chemodynamic therapy nanoenzymes have rapid and long-term bactericidal ability, well-conglutinant performance and effectively preventing wound infection for clinical application. Statement of Significance Wound infections caused by drug-resistant bacteria pose a great threat to human health, and the development of non-drug-resistant antibacterial approaches has become a research priority. In this study, we developed Cu2O-SnO2 doped polydopamine (CSPDA) triple cubic yolk-like antibacterial nanoenzymes with high photothermal conversion efficiency and Fenton-like catalase effect for photothermal and Chemodynamic antibacterial therapy, Meanwhile, the nanocomposites exhibit good antibioadhesion in a natural water environment for a long-time immersion. In conclusion, this study successfully develops an efficient and long-lasting bacterial infection treatment system. These findings present a pioneering strategy for future research on the design of synergistic antibacterial and antibioadhesive systems.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Xun Li,Heng He,Tian Tan,Zhihan Zou,Zhanyou Tian,Wanling Zhou,Yuwen Bao,Xiaohong Xia,Yun Gao
Low power consumption is a new emerged requirement for methane sensors long-term working in a gas supervisory control system. Great challenges remain in development of heat free methane sensors based on metal oxide semiconductors (MOS). In this work, Pt-doped SnO 2 (Pt-SnO 2 ) grow on well aligned ZnO nanorod-array to form an inter-staggered double-layer structure on AZO glass by a two-step hydrothermal method, with the annealing temperature being systematically studied. The optimized processing parameters are 1 at% Pt doping content and 700 °C annealing temperature, offering the best sensing response of 3.36 to 800 ppm CH 4 at room temperature. SnO 2 /ZnO without Pt doping shows linear I-V relationship, while the Pt-SnO 2 /ZnO shows a Schottky-like I-V curve with the Schottky barrier height decreases as increasing the CH 4 concentration. The activation energy (Δ E a ) for CH 4 dissociation decreases with increasing the annealing temperature, and the Δ E a of the optimized Pt-SnO 2 /ZnO sample is only one-third of that in the SnO 2 /ZnO. In addition to the piezoelectric polarization electric field in ZnO, the build up Schottky-like barrier and the reduced activation energy via Pt doping and annealing are demonstrated to be efficient for enhancing the methane sensing performance at low operation temperature.
研究领域:
材料科学
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传感器技术
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）