MOLECULES
·
2021
·Vol. 26
·期 20
·6108
·
IF 4.412
Xiaoli Wang,Xinyu Zhao,Yin Wang
There is an ever-increasing trend toward bendable and high-energy-density electrochemical storage devices with high strength to fulfil the rapid development of flexible electronics, but they remain a great challenge to be realised by the traditional slurry-casting fabrication processes. To overcome these issues, herein, a facile strategy was proposed to design integrating an electrode with flexible, high capacity, and high tensile strength nanosheets with interconnected copper micro-fibre as a collector, loaded with a novel hierarchical SnO2nanoarchitecture, which were assembled into core–shell architecture, with a 1D micro-fibre core and 2D nanosheets shell. When applied as anode materials for LIBs, the resultant novel electrode delivers a large reversible specific capacity of 637.2 mAh g−1at a high rate of 1C. Such superior capacity may benefit from rational design based on structural engineering to boost synergistic effects of the integrated electrode. The outer shell with the ultrathin 2D nanoarchitecture blocks can provide favourable Li+lateral intercalation lengths and more beneficial transport routes for electrolyte ions, with sufficient void space among the nanosheets to buffer the volume expansion. Furthermore, the interconnected 1D micro-fibre core with outstanding metallic conductivity can offer an efficient electron transport pathway along axial orientation to shorten electron transport. More importantly, the metal’s remarkable flexibility and high tensile strength provide the hybrid integrated electrode with strong bending and stretchability relative to sintered carbon or graphene hosts. The presented strategy demonstrates that this rational nanoarchitecture design based on integrated engineering is an effective route to maintain the structural stability of electrodes in flexible LIBs.Keywords:anode;flexible electronics;nanosheets;SnO2
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Baoshuai Xing,Xiaoli Cheng,Tingting Wang,Xianfa Zhang,Lihua Huo,Yingming Xu
Chlorine (Cl 2 ) is a highly hazardous and corrosive substance that can cause severe respiratory problems and skin burns in humans at low doses. The effective detection of Cl 2 has become critical for protecting both the ecological environment and public health. Herein, the oxygen vacancy-abundant SnO 2 were synthesized using SnS as template followed by the calcination method. The resultant SnO 2 -800 sensor exhibits improved sensing response to Cl 2 (about 205–10 ppm) at room temperature, together with a trace detection limit of 100 ppb. Such excellent sensing properties could be assigned to several reasons including the unique cross-linked structure, the appropriate amount of grain boundaries, and especially sufficient oxygen vacancies. The XPS, GC-MS techniques and DFT theoretical calculation were combined used to detailly investigate the sensing mechanism. This work might shed light on the rational design of high-performance sensing materials via defect engineering.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Qiaoling Xing,Xujie Chen,Yong Cai,Ming Zhang
As a kind of green energy, hydrogen (H 2 ) has been widely concerned and applied by people. One of the biggest challenges for sensing applications is the quick detection of hydrogen leaks or their release in various conditions, particularly in large electric vehicle batteries. This study successfully constructed a quick response and recovery hydrogen sensor based on the In 2 O 3 -SnO 2 heterojunction. The response and recovery time of the In 2 O 3 -SnO 2 hydrogen sensor is 1.1/1.9 s to 50 ppm H 2 . This is reduced to 11.0 %/9.5 % compared to the SnO 2 hydrogen sensor. This sensor's remarkable gas detecting properties are mainly attributed to the In 2 O 3 -SnO 2 heterojunction creation, crystal structure modification, and increased specific surface area (92.9 m 2 /g). Homogenous In 2 O 3 -SnO 2 nanocomposites contain more oxygen defects, which is the primary factor enhancing the sensor's ability to detect gases. Firstly, indium ions are incorporated in the lattice of SnO 2 results in lattice distortion and enhances the presence of oxygen deficiency in the composites, which plays a pivotal role in achieving rapid response and recovery of the sensor. Secondly, In 2 O 3 -SnO 2 heterostructures promote rapid adsorption of oxygen molecules and target gases by facilitating effective electron mobility on their surface. The quicker response and recovery times of hydrogen sensors based on In 2 O 3 -SnO 2 heterojunctions are observed. This innovative approach to creating fast-responding gas sensors highlights the promise of heterojunction-based hydrogen sensors for real-time H 2 monitoring and opens up new research directions.
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
·
2017
·
IF 5.401
Wei Zhang,XiaoLi Cheng,Xianfa Zhang,Yingming Xu,Shan Gao,Hui Zhao,Lihua Huo
Distinctive mesoporous SnO 2 microtubes were synthesized via a facile and environmentally friendly solvothermal method. The gas sensor based on such SnO 2 microtubes exhibited not only the lower detection limit to detect formaldehyde and remarkable selectivity comparison with other various gases when operating within 92 °C, but also good linear relationship under concentration ranges of ppm level (1–100 ppm) and ppb level (10–100 ppb). The sensing properties of such SnO 2 microtubes have been greatly improved compared to previously reported hollow structures. This might be attributed to their large specific surface area and porous structure, which can promote the diffusion of gas molecules and their adsorption on the surface of the sensing material.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2023
·
IF 6.2
Yong Zhou,Zhihao Hu,Hongchao Zhao,Yanjie Wang,Jing Li,Cheng Zou
Hydrogen sulfide (H 2 S) emission from industrial fields and bacteria decomposing of sulfur-containing organic matter poses a significant impact on human health and atmospheric environment, thus necessitating the development of a H 2 S sensor with high sensitivity and exclusive selectivity especially at a very low dose. Chemiresistive sensors based on traditional metal oxides were readily limited by the elevated operating temperature and severe cross-sensitivity. To overcome these obstacles, we prepared two dimensional (2D) tin oxide (SnO 2 ) nanosheets decorated with thin black phosphorus (BP) as the sensing layer of MEMS H 2 S sensors. Compared with pure SnO 2 counterparts, BP-SnO 2 sensors demonstrated lower optimal working temperature (130 °C vs. 160 °C), higher response (8.1 vs. 4.6) and faster response/recovery speeds (39.8 s/47.4 s vs. 79 s/140 s) toward 5 ppm H 2 S as well as larger sensitivity (1.3/ppm vs. 0.342/ppm). In addition, favorable repeatability, long-term stability, selectivity and humidity tolerance were exhibited. Thin BP not only served as an excellent conductivity platform within the composites, but enriched the adsorption sites by constructing p-n heterojunctions and introducing more oxygen vacancy , thus separately accelerating and strengthening the gas-solid interaction. This study showcased the application superiorities of BP nanosheets in the field of gas sensing, simultaneously providing a new strategy for trace H 2 S sensing via the 2D heterojunctions.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganics
·
2023
·Vol. 11
·期 9
·366
·
IF 2.9
Jieting Zhao,Jiannan Song,Xilai Lu,Menghan Wu,Zhiqiao Yan,Feng Chen,Wanping Chen
Soluble noble metal salts are widely used for loading noble metals as nano-catalysts in many applications. In this paper, Pt-SnO2composite nanoceramics were prepared from SnO2nanoparticles and H2PtCl6using two Pt loading methods separately: for the solution reduction method, a H2PtCl6solution was added to a suspension of SnO2and zinc powder to form Pt on SnO2nanoparticles, and for the impregnation method, Pt was formed from H2PtCl6in the course of sintering. Although a series of samples prepared using both Pt loading methods showed a solid response to H2at room temperature, the ones prepared using the solution reduction method exhibited much better room-temperature hydrogen-sensing characteristics. For two samples of 0.5 wt% Pt and sintered at 825 °C, the response value for the sample prepared using the solution reduction method was 9700 to 1% H2–20% O2-N2, which was much larger than the value of 145 for the sample prepared using the impregnation method. Samples prepared using the two Pt loading methods have similar microstructures characterized via XRD, FESEM, EDS, TEM, and HRTEM. However, the residual chlorine content in those using the impregnation method was higher than those using the solution reduction method according to the analysis. It is proposed that the striking difference in room-temperature hydrogen sensing characteristics among samples prepared using these two different Pt loading methods separately resulted from their different chlorine removal processes. This study demonstrates the importance of a proper method for loading noble metals from their soluble salts as nano-catalysts in many applications.Keywords:SnO2;gas sensor;room temperature;Pt loading;catalyst
研究领域:
材料科学
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传感器技术
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 9
·2123
·
IF 3.623
Ming Liu,Caochuang Wang,Pengcheng Li,Liang Cheng,Yongming Hu,Yao Xiong,Shishang Guo,Haoshuang Gu,Wanping Chen
Many low-dimensional nanostructured metal oxides (MOXs) with impressive room-temperature gas-sensing characteristics have been synthesized, yet transforming them into relatively robust bulk materials has been quite neglected. Pt-decorated SnO2nanoparticles with 0.25–2.5 wt% Pt were prepared, and highly attractive room-temperature hydrogen-sensing characteristics were observed for them all through pressing them into pellets. Some pressed pellets were further sintered over a wide temperature range of 600–1200 °C. Though the room-temperature hydrogen-sensing characteristics were greatly degraded in many samples after sintering, those samples with 0.25 wt% Pt and sintered at 800 °C exhibited impressive room-temperature hydrogen-sensing characteristics comparable to those of their counterparts of as-pressed pellets. The variation of room-temperature hydrogen-sensing characteristics among the samples was explained by the facts that the connectivity between SnO2grains increases with increasing sintering temperature, and Pt promotes oxidation of SnO2at high temperatures. These results clearly demonstrate that some low-dimensional MOX nanocrystals can be successfully transformed into bulk MOXs with improved robustness and comparable room-temperature gas-sensing characteristics.
研究领域:
材料科学
·
传感器技术
✓ 已验证
DOI
高影响因子
ACS Sensors
·
2024
·
IF 8.2
Mingxue Zhang,Jihao Bai,Chengming Sui,Yilin Wang,Ziqi Liu,Tianrun Zheng,Fengmin Liu,Xishuang Liang,Geyu Lu
Hydrogen (H2) is colorless, odorless, and has a wide explosive concentration range (4–75 vol %), making rapid and accurate detection of hydrogen leaks essential. This paper demonstrates a method to modify the spatial distribution of nanocrystals (NCs) by adding surfactants to improve the sensing performance. In order to explore its potential for H2 gas-sensing applications, SnO2, containing different mass percentages of PdCu NCs, was dispersed. The results show that the 0.1 wt % PdCu-SnO2 sensor based on surfactant dispersion performs well, with a response to 0.1 vol % H2 that is 18 times higher than that of the undispersed 0.1 wt % PdCu-SnO2 sensor. The enhanced gas-sensing ability after dispersion can be attributed to the fact that the uniform distribution of NCs generates higher quantum efficiency and exposes more active sites on the carrier surface compared to nonuniform distribution. This study provides a simple, novel, and effective method to improve the sensor response.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Molecular Catalysis
·
2023
·
IF 4.6
Hele Liu,Pengfei Tan,Lu Yang,Mingyuan Zhang,Jiaoyang Chen,Ruifeng Ren,Huanhuan Zhai,Tiangui Qi,Jun Pan
Improving photocatalytic activity is crucial for promoting photocatalytic hydrogen production. Element doping is a feasible strategy to accelerate carrier separation and migration rate. Herein, a simple one-pot hydrothermal process was used to create In doped Sn 3 O 4 composite photocatalyst. It was demonstrated that the addition of In considerably raises the concentration of oxygen vacancy , which provides more unsaturated active sites, thus regulating the photocatalyst's electronic structure and surface properties, and promoting the carrier migration efficiency. Meanwhile, the light absorption range of samples after doping is redshifted, and the light absorption capacity is enhanced, which effectively improves the photocatalytic activity. Due to this, the optimal sample's average hydrogen production under visible light reached 22.83 μmol g −1 h −1 , 4.5 folds more than that of Sn 3 O 4 , and shown good stability. This research presents a novel approach for the development of metal oxide photocatalyst with excellent activity and durability.
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
JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Lili Liu,Yangyang Pu,Yao Lu,Na Li,Zhaoxia Hu,Shouwen Chen
Towards the breaking of the “trade-off” between proton conductivity and stabilities of sulfonated poly(aryl ether sulfone) (SPAES)-based proton exchange membranes, a strategy of compositing with the superacids of sulfated SnO 2 (ST) and SnO 2 -xCeO 2 (CSTx) is designed and carried out. The superacids of ST and CSTx have been synthesized by sulfonation of SnO 2 with sulfuric acid and subsequently doped with CeO 2 . By the solution casting approach, the composite membranes are obtained in a homogenous state and show excellent mechanical strength , thermal, dimensional and chemical stability. ST or CSTx in the composite membranes provides excess active sites and forms additional proton-conducting channels by a network of hydrogen bonds . Although with low IEC levels, all the composite membranes show larger water absorption and proton conductivity than the control SPAES membrane. As a result, the SPAES-2CST3 membrane achieves a power output of 673.6 mW/cm 2 at 80 °C, which is higher than the control membrane (481.8 mW/cm 2 ). The durability of the SPAES-2CST3 membrane under accelerated stress test conditions is significantly enhanced compared to the control SPAES membrane, and the aged SPAES-2CST3 membrane exhibits lower hydrogen crossover and better cell performance than the aged control SPAES membrane.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2021
·
IF 19.503
Jing Wu,Rong Zhao,Hui Xiang,Chenfan Yang,Wenda Zhong,Chengzhi Zhang,Qin Zhang,Xuanke Li,Nianjun Yang
Tin disulfide (SnS 2 ), one transition metal dichalcogenide (TMD) is a cost-effective and promising electrocatalyst for hydrogen evolution reactions (HER) in the alkaline electrolytes. Its electrocatalytic HER performance is unfortunately limited, originating from its un-conspicuous inherent catalytic activities and non-favorable adsorption sites for hydrogen. Herein, a tin disulfide/stannic oxide (SnS 2 /SnO 2 ) heterostructure is designed and grown on the nickel foam (denoted as SnS 2 /SnO 2 -NF). The SnS 2 /SnO 2 heterostructure introduces more active (100) facets or a high density of active sites, accelerates the diffusion kinetic of electrons and ions, lowers the water dissociation energies, and optimizes adsorption energies of hydrogen atoms. On this catalyst, superior HER performance is realized in an alkaline medium. An overpotential of 108 mV at a current density of −10 mA cm –2 with a Tafel slope of 50.1 mV dec –1 and long-term durability are achieved for HER in 1 M KOH. This work paves a new way to design high-performance HER electrocatalyst through facet engineering of the designed heterostructures.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Silicon
·
2018
·Vol. 10
·期 6
·2845-2854
·
IF 1.246
Zhang Bin,Jiang Yujie,Han Jian
Although research on halogen free flame retardant has achieved great progress, its practical application is restricted due to high additive amount and low efficency. To solve this problem, multilayers microcapsule [melamine–formaldehyde resin (MF)/silicon dioxide (SiO 2 )/zinc hydroxystannate (ZHS)] was prepared through a two-step method. Moreover, when 16.40 wt% SiO 2 /ZHS microcapsules was mixed with poly(vinyl chloride) (PVC) matrix, the obtained PVC composites exhibited a high limited oxygen index (LOI) of 32.5%, showing its excellent flame retardancy. Furthermore, for the compatibility between MF/SiO 2 /ZHS microcapsules and PVC to be improved, MF was coated to SiO 2 /ZHS microcapsules by in situ polymerization. When 16.40 wt% MF/SiO 2 /ZHS microcapsules were mixed with PVC matrix, the obtained PVC composites exhibited a high LOI of 35.5%, showing its high flame retardancy. Therefore, this easily prepared multilayers microcapsule with sufficient flame retardancy in this work, it could have a potential for engineering applications.
Taking advantage of microencapsulation strategy to fabricate MF/SiO2/ZHS microcapsules for fire-retardant PVC materials
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
危险品化学品经营许可证（带存储）