ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Gaojie Li,Xiaohong Wang,Liuming Yan,Yan Wang,Zhanying Zhang,Jiaqiang Xu
Bimetallic nanoparticles (NPs) usually exhibit some novel properties due to the synergistic effects of the two distinct metals, which is expected to play an important role in the field of gas sensing. PdPt bimetal NPs with Pd-rich shell and Pt-rich core were successfully synthesized and used to modify SnO2 nanosheets. The 1P-PdPt/SnO2-A sensor obtained by self-assemblies of PdPt NPs exhibited temperature-dependent dual selectivity to CO at 100 °C and CH4 at 320 °C. Furthermore, the sensor possessed good long term stability and antihumidity interference. The activation energy of adsorption for CO and CH4 were estimated by the temperature-dependent response process modeled using Langmuir adsorption kinetics, which proved that the lower activation energy of adsorption corresponded to better sensing performance. The gas-sensing mechanism based on the diffusion depth of the tested gas in the sensing layer was discussed. The dramatically improved sensing performance could be ascribed to the high catalytic activity of PdPt bimetal, the electron sensitization of PdO, and Schottky barrier-type junctions at the interface between SnO2 and PdPt NPs. Our present results demonstrate that bimetal NPs with special structure and components can significantly improve the gas-sensing performance of metal oxide semiconductor and the obtained sensor has great potential in monitoring coal mine gas.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 78
·74944-74956
·
IF 3.289
Yang Li,Huitao Ban,Mingfei Jiao,Mujie Yang
We report a facile method for the in situ growth of vertically aligned SnO2 nanosheets on a substrate, which involved the hydrothermal treatment of the substrate covered with electrospun nanofibers of poly(vinyl butyral) containing SnCl2 at low temperatures and free of additives. The formation mechanism of nanostructured SnO2 has been explored. Gas sensors based on the composites of SnO2 nanosheets and polyaniline were prepared by vapor phase polymerization of aniline or the dip coating with water-processable polyaniline, and revealed good contact between the sensing films and underlying electrode. The nanocomposite sensors demonstrate very high response magnitude toward NH3 (relative resistance change of ∼3700% towards 10.7 ppm of NH3), ultra-low detection limit (∼46 ppb), good sensing repeatability and excellent selectivity at room temperature. Investigations on the gas sensing mechanism of the nanocomposite suggest that the establishment of the p/n heterojunction at the interface of p-type PANI and n-type SnO2 play an important role in enhancing the response magnitude of the nanocomposite. The method could provide new solutions for the direct fabrication of optoelectronic and electrochemical devices based on nanostructured metal oxides and their composites.
研究领域:
材料科学
·
传感器技术
·
纳米科技
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Yang Li,Huitao Ban,Mujie Yang
Nanocomposites of SnO 2 nanosheets and polypyrrole (PPy) were facilely prepared and their gas sensing properties towards low concentration of NH 3 have been investigated at room temperature. Vertically aligned SnO 2 nanosheets were in situ grown on the substrates via hydrothermal treatment of electrospun nanofibers containing SnCl 2 precursors at a low temperature (135 °C), and coated with PPy by vapor phase polymerization of pyrrole. The SnO 2 nanosheets and the nanocomposites were characterized by X-ray diffraction patterns, Fourier transform infrared spectroscopy, field emission scanning electron microscopy and high resolution transmission microscopy. The nanocomposite sensors exhibited much higher response magnitude towards NH 3 than the sensors based on PPy alone. The effect of the type of doping acids and polymerization time of pyrrole on the sensing properties of the nanocomposites was examined. The nanocomposite sensors revealed sensitive (sensitivity of ∼6.2%/ppm in the range of 1–10.7 ppm of NH 3 , detection limit of ∼257 ppb), selective and repeatable response to NH 3 , and the sensing mechanism has been explored. This work could provide references for the facile preparation of advanced gas sensors based on in situ grown nanostructured metal-oxide semiconductors and their composites.
研究领域:
材料科学
·
化学工程
·
传感器技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Qihua Sun,Yan Xu,Weijing Wang,Jun Sun,Jialin Li,Jin Li,Zhaofeng Wu,Haiming Duan
The detection of trimethylamine (TMA) is important not only for assessing the quality of seafood products but also for monitoring the environment. Biomass-derived carbon materials have been used for gas-sensitive detection because of their environmental friendliness, abundance, diversity, and chemical stability. In this work, the green waste of groundsel fibers (GFs) was used as a substrate, and ultrathin SnO 2 nanosheets were successfully grown in situ on GFs via a simple hydrothermal reaction (SnO 2 /CGFs). The structures and morphologies of the materials were characterized to detect TMA gas at room temperature. Compared with pure CGFs, SnO 2 /CGFs showed satisfactory selectivity for TMA (500 ppm), higher sensitivity, and a response/recovery time of 5.5/3.3 s. The SnO 2 /CGF sensor exhibits good long-term stability and repeatability for the detection of TMA gas. It exhibits good linearity in measuring TMA gas in the concentration range of 5–200 ppm with a theoretical detection limit of 0.475 ppm and monitored the spoilage process of sea bass at room temperature. The improved gas-sensitive performance of SnO 2 /CGFs is attributed to the unique microstructure, heterojunction formation, and abundance of oxygen species of SnO 2 on carbon tubes of biomass grown in situ.
研究领域:
材料科学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Qingdong Chen,Yong Zhang,Mingcong Tang,Zijian Wang,Dongzhi Zhang
During the process of lithium-ion battery failure, the discharge of hydrogen indicates that the electrolyte has leaked and is being electrolyzed, which is a sign of thermal runaway in lithium batteries . In this work, stannic oxide (SnO 2 ) nanosheets was formed by high-temperature calcination and compounded with Ti 3 C 2 Tx (MXene) in different proportions. The morphology, microstructure and element composition of the material were characterized. The sensing response of MXene-SnO 2 for hydrogen (H 2 ) at the most suitable temperature was explored. The test results show that compared with single SnO 2 , MXene-SnO 2 composite sensor has higher response, shorter response/recovery time, stable repeatability and excellent selectivity. Finally, through density functional theory (DFT) calculation, it may be caused by the microstructure of SnO 2 and MXene synergism in the effect of forming heterostructures between the two materials in response to hydrogen gas .
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2022
·
IF 9.257
Xinxin Bian,Bowen Liu,Xiaolei Wang,Zhimin Chen,Rui Gong,Wanqi Jia,Zichen Song,Huiyuan Meng,Weibo Yin,Zhiyu Ren
Defects engineering is one of the effective strategies to advance the CO 2 conversion into value-added chemicals and fuels during the electrochemical process. It is noteworthy that multiple defects are often associated in the reaction process, hence how to stimulate their synergistic effect is extremely important, but still lacks in-depth understanding. Herein, SnO 2 nanosheets with simultaneous oxygen vacancies and Zn dopants (Zn–Vo–SnO 2 ), as a proof-of-concept study, were proposed to elucidate the synergistic effect of multiple defects on enhanced CO 2 -to-C 1 conversion. Zn–Vo–SnO 2 , which is prepared by coupling a facile hydrothermal reaction and a subsequent desulfurization, yields the C 1 products at the lower applied potential, and maintains the FE C1 of about 95% at −0.80 V vs. RHE for a long-term operation. Evidences from systematic experiment and theoretical calculation corroborate that the charge redistribution caused by the oxygen vacancies and Zn-doping synergistically energize the CO 2 conversion, in the term of the CO 2 adsorption, the hydrogenation of CO 2 and intermediates, and the thermodynamic energies of the rate-determining steps. This study has an insight into defect engineering to design advanced electrocatalysts for implementable CO 2 recycling and utilization.
研究领域:
材料科学
·
电化学
·
能源催化
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Hewei Zhao,Xiaolong Zeng,Tian Zheng,Shaojia Liu,Jie Yang,Rui Hao,Fengshi Li,Lin Guo
High capacity, ultra-fast charge/discharge rate, and long cycling life are external targets for Lithium-ion batteries (LIBs) to satisfy modern energy storage, but it is still challenging to realize them simultaneously. Here, we report a three-dimensional (3D) porous rGO@SnO 2 nanosheets aerogel (rGO@SnO 2 NSA) based on in-situ growing two-dimensional (2D) SnO 2 nanosheets on graphene oxide (GO@SnO 2 NS), subsequent controllable assembly and reduction. The 2D structure of SnO 2 can shorten the electron-transfer path, and the porous architecture of the 3D aerogel endows the aerogels with external ion-transfer channels and exceptional capacitive contribution. As a result, the LIBs using our 3D aerogels as anodes can endure ultrafast charge/discharge (10 A g −1 ) rate and exhibit ultra-long cycling life with a high energy density (512.1 mAh g −1 after 10,000 cycles). For application exploration, the LiFePO 4 /rGO@SnO 2 NSA cell also possesses excellent energy storage performance (364.5 mAh g −1 after 100 cycles). Our electrode design strategy of combining 2D active materials and 3D porous architecture provides a new path to develop next-generation rechargeable energy storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2025
·
IF 5.5
Xudong Wu,Bingqian Zu,Aoshuo Tian,Song Chen,Zilong Xu,Tao Ma,Liang Wu
Tin dioxide (SnO2) anodes have emerged as a promising and cost-effective alternative for high-energy-density lithium-ion batteries (LIBs). However, their practical implementation is limited by rapid capacity degradation and poor rate performance, which are attributed to severe volume fluctuations, phase aggregation, and sluggish reaction kinetics during cycling. Here, we report a straightforward and efficient template-directed oxidation strategy for the synthesis of two-dimensional polycrystalline SnO2 nanosheets as advanced LIB anodes using layered tin diselenide nanosheets as sacrificial precursors. The SnO2 nanosheets synthesized at 500 °C (SnO2-500) exhibit a wrinkled lamellar architecture comprising interconnected SnO2 nanoparticles, which is advantageous for applications in LIBs. As a result, the obtained SnO2-500 anode delivered exceptional cycling stability (623.7 mA h g–1 after 100 cycles at 0.5 A g–1), along with outstanding specific capacity and rate performance (1245.7 mA h g–1 at 0.1 A g–1 and 554.1 mA h g–1 at 5 A g–1).
研究领域:
材料科学
·
电化学
·
纳米技术
·
储能
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Mengxiao Yan,Tingjie Mao,Tiantian Zeng,Kai Chen,Shun Wang,Juan Wang,Huile Jin
Electrochemically reducing CO2 (CO2RR) to high-value chemical products is recognized as a promising route to simultaneously reduce the consumption of fossil fuels and carbon emission. The fabrication of syngas with an appropriate H2/CO ratio by CO2RR has been widely studied, but the dynamic evolution of the catalyst is still ambiguous. Herein, the reconstruction of CuO/SnO2 nanosheets (NSs) with a heterojunction structure in the CO2RR process was reported by an in situ X-ray diffractometer technique. The products of the CO2RR on the optimized CuO/SnO2 NSs are CO and H2, achieving a nearly 100% total Faraday efficiency. Moreover, the resulting syngas is maintained at a constant 2:1 ratio of H2/CO over a wide potential of −0.8 to −1.2 V versus the reversible hydrogen electrode. Importantly, the detailed characterizations show that Cu2+ is reduced to Cu during the CO2RR process, while the valence state of Sn remains stable. This study presents strong experimental support for the dynamic evolution process of electrocatalysts in other energy conversion fields.
研究领域:
材料科学
·
能源转换
·
电催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhaopeng Li,Hongye Qin,Kunjie Zhu,Pei Liu,Xuchun Chen,Xiaotian Wang,Haixia Li,Lifang Jiao
Although tremendous efforts have been dedicated to promote the electrochemical stability of sodium metal batteries (SMBs), the uncontrollable dendrites growth and inevitable side reactions at the sodium (Na) anode/electrolyte interface have not been effectively resolved. In this work, a flexible and functionalized 3D framework with mesoporous SnO2 nanosheet arrays (SnO2@CC-12) is fabricated to serve as a sodiophilic matrix toward dendrite-free Na metal anode. The mesoporous SnO2 nanosheet arrays provide abundant sodiophilic sites and sufficient internal voids, which can not only accelerate electron transport to reduce the local current density of Na anode surface but also manipulate the Na+ flux deposition to suppress the growth of Na dendrites. Therefore, the SnO2@CC-12-Na symmetric cell exhibits an ultralow overpotential of 9 mV and superior Na plating/stripping stability over 2200 h at 1.0 mA cm–2. Moreover, the full cells using Na3V2(PO4)3 cathode show favorable high-rate performance and impressive long cycling stability with 95.1% capacity retention over 1000 cycles at 500 mA g–1. This work may provide a new insight into the design of functionalized interface layer with high sodiophilicity toward dendrite-free SMBs.
研究领域:
电化学
·
材料科学
·
能源存储
·
纳米材料
·
界面工程
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
·
2016
·Vol. 11
·期 1
·1-7
·
IF 2.584
Chen Zeng,Wei Chaochao,Li Shengjun,Diao Chunli,Li Wei,Kong Wenping,Zhang Zhenlong,Zhang Weifeng
SnO 2 nanosheet-structured films were prepared on a fluorine-doped tin oxide (FTO) substrate using ZnO nanosheet as template. The as-prepared SnO 2 nanosheets contained plenty of nano-voids and were generally vertical to the substrate. TiO 2 nanoparticles were homogeneously deposited into the intervals between the SnO 2 nanosheets to prepare a hierarchically structured SnO 2 /TiO 2 hybrid film. The hybrid films were co-sensitized with CdS and CdSe quantum dots. The sensitized solar cells assembled with the SnO 2 /TiO 2 hybrid film showed much higher photoelectricity conversion efficiency than the cells assembled with pure TiO 2 films. The lifetime of photoinduced electron was also investigated through electrochemical impedance spectroscopy, which showed that the SnO 2 /TiO 2 hybrid film electrode is as long as the TiO 2 film electrode.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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