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
ACS Applied Materials & Interfaces
·
2013
·
IF 5.008
Mingxi Chen,Congcong Zhang,Lingzhi Li,Yu Liu,Xichuan Li,Xiaoyang Xu,Fengling Xia,Wei Wang,Jianping Gao
A facile approach to prepare SnO2/rGO (reduced graphene oxide) hybrid nanoparticles by a direct redox reaction between graphene oxide (GO) and tin powder was developed. Since no acid was used, it is an environmentally friendly green method. The SnO2/rGO hybrid nanoparticles were characterized by ultraviolet–visible spectroscopy, Raman spectroscopy, thermogravimetric analysis, X-ray diffraction analysis, and X-ray photoelectron spectroscopy. The microstructure of the SnO2/rGO was observed with scanning electron microscopy and transmission electron microscopy. The tin powder efficiently reduced GO to rGO, and the Sn was transformed to SnO2 nanoparticles (∼45 nm) that were evenly distributed on the rGO sheets. The SnO2/rGO hybrid nanoparticles were then coated on an interdigital electrode to fabricate a humidity sensor, which have an especially good linear impedance response from 11% to 85% relative humidity.
研究领域:
材料科学
·
纳米技术
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PAPERS
·
2024
·Vol. 78
·期 13
·7573-7581
·
IF 2.1
Xu Xianglan,Qian Zijian,Wang Dongxue,Liu Fang,Zhu Jia,Fang Xiuzhong,Xu Junwei,Wang Xiang
The rutile SnO 2 monolayer dispersion capacity on the rutile TiO 2 (r-TiO 2 ) was obviously higher than that on the anatase TiO 2 (a-TiO 2 ) via the qualification of the X-ray diffraction extrapolation method, presenting a like-disperses-like rule. Combined hydrogen temperature-programmed reduction and X-ray photoelectron spectroscopy results revealed that stronger interaction occurred between the supported SnO 2 and the r-TiO 2 than and the a-TiO 2 , thus resulting in higher SnO 2 dispersion on the r-TiO 2 . The SnO 2 /r-TiO 2 catalysts exhibited higher CO activity than the SnO 2 /a-TiO 2 catalysts with the same SnO 2 loadings, verified that the supported SnO 2 and the support sharing a crystalline phase is favorable to achieve the more active dispersed component. The CeO 2 monolayer dispersion capacities on cubic c-ZrO 2 and monoclinic m-ZrO 2 supports further confirmed the universality of the like-disperses-like rule for oxide–oxide systems independent on preparation methods. By comparing a series of oxide–oxide systems, the like-disperses-like rule involved not only the crystalline phase and lattice matching, but also M–O bond characteristics of two oxides. Graphical Abstract
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 32
·20062-20067
·
IF 3.108
Fengcai Li,Jia Du,Hao Yang,Wei Shi,Peng Cheng
N-Doped-carbon-coated 2–4 nm SnO2 nanoparticles were synthesized via a facile metal–organic framework (MOF) coating process followed by a calcination of the SnO2@MOF composite. The as-prepared SnO2 nanoparticles are well dispersed and coated with a uniform nitrogenous carbon structure, which can effectively prevent volume expansion during discharge and charge processes. Benefiting from the advantages of a synergistic effect of SnO2 nanoparticles and carbon structure, these materials exhibit excellent electrochemical performance. For the optimized material SOC-3, a reversible specific capacity of 1032 mA h g−1 was maintained at 100 mA g−1 after 150 cycles with a coulombic efficiency of 99%. When the current was increased to 500 mA g−1, a capacity of 600 mA h g−1 was still attained.
✓ 已验证
DOI
高影响因子
Catalysts
·
2020
·Vol. 10
·期 2
·211
·
IF 3.52
Yongxin Zhang,Long Lin,Xiaoming Zheng,Chunyan Liu,Quanren Zhu,Hongchen Guo
In this study, a series of SnO2modified zeolite catalysts (Snx-S-1; x is the weight percentage of Sn) were prepared with SnCl2and a defective Silicalite-1 (S-1) zeolite via facile deposition–precipitation method. It was found that the stannic species modified all-silica zeolite catalysts were active for the intermolecular condensation of ethylenediamine (EDA) to 1, 2-Diazabicyclo [2, 2, 2] octane (TEDA) and piperazine (PIP). The best catalyst Sn6-S-1 (6 wt.% Sn loading) showed 86% EDA conversion and 93% total selectivity to TEDA and PIP. By contrast, the defective S-1 zeolite parent showed only approximately 9% EDA conversion under the same conditions. With the help of catalyst characterization techniques including hydroxyl vibration and pyridine adsorption FT-IR spectroscopy (transmission mode), the enhancement of the catalytic activity of the SnO2modified zeolite catalysts (Snx-S-1) was mainly attributed to the formation of mild Lewis acid sites in the siliceous zeolite. Both the hydroxyl nests of the defective S-1 zeolite and the dispersed SnO2clusters should be the important factors for the formation of mild Lewis acid sites on the modified zeolite. Based on the catalytic performance of the modified zeolite in the conversion of EDA to PIP and TEDA, it is inferred that the mildly acidified defective S-1 zeolite by the SnO2deposition modification might become a very active and durable catalyst for reactions involving strongly alkaline reactants and products.Keywords:defective Silicalite-1;SnO2modification;acidity;condensation of ethylenediamine
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Fengyi Zhong,Chaowei Yuan,Ye He,Yanjuan Sun,Jianping Sheng,Fan Dong
Constructing heterostructure is an effective way to fabricate advanced photocatalysts. However, the catalytic performance of typical common multi-dimensional bulk heterostructure still suffers from the limited active interface and inefficient carrier migration. Herein, we successfully synthesize the SnO 2 /Cs 3 Bi 2 I 9 dual-quantum-dots nanoheterostructure (labeled as SCX, X = 1, 2, 3) for efficiently and stably photocatalytic NO removal under visible light irradiation. The NO removal rate of SC2 is almost 8 and 17 times higher than that of the single SnO 2 and Cs 3 Bi 2 I 9 , respectively. Moreover, the SC2 photocatalyst shows only 3 % attenuation after five consecutive cycles, demonstrating good photocatalytic stability. Systematic experimental characterization and theoretical density functional theory calculations revealed that the high activity and stability of SCX originated from the efficient charge transfer at the confined interface between SnO 2 and Cs 3 Bi 2 I 9 quantum dots . This work provides a new perspective for constructing innovative dual-quantum-dots nanoheterostructure and assesses their potential in photocatalytic environmental applications.
研究领域:
材料科学
·
环境科学
·
理论计算
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2025
·
IF 4.8
Xinyu Liu,Chengxiong Wang,Feng Feng,Yinglong Wu,Shiying Chang,Guangxin Liu,Dong Tian,Weinan Yang,Xianming Cheng,Dongxia Yang,Kongzhai Li,Yunkun Zhao
Catalyst deactivation caused by SO 2 poisoning generally hinders commercial viability of CO oxidation catalysts in the field of industrial flue gas purification. XPS results, CO-DRIFTS spectra and DFT calculations suggested that Pt was highly-dispersed and remained the oxidative states on SnO 2 support, resulting in that the rate-determining step of CO oxidation is to clean up the adsorbed CO and PtS 2 species is readily formed in a SO 2 -contained hydrothermal environment. It predominantly maintained metallic Pt 0 in the Pt/WO 3 catalyst, thereby led to cleaning up the activated oxygen atoms as the rate-determining step. It is very difficult to remove the sulfur species in SO 2 -poisoned catalysts within 600 °C and the mechanisms of CO oxidation are not affected by SO 2 poisoning for Pt/SnO 2 and Pt/WO 3 catalysts. These findings provide some significant insights to understand the mechanisms of CO oxidation and SO 2 -tolerance.
研究领域:
催化化学
·
环境科学
·
理论计算化学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Jiaojiao Fang,Jiaqi Li,Yukai Chen,Jiale Cheng,Chengyang Zhu,Junjie Mao
CO2-selective photoreduction to value-added products is ideal, but its practical application suffers from weak photogenerated carrier separation and insufficient multielectron transport. Herein, we constructed the tricomponent AuNPs@SnO2–AuNCs hybrid by decorating Au nanoclusters (AuNCs) on the Au nanoparticle (AuNPs)@SnO2 core–shell structure. AuNC–NP dual coupling endowed AuNPs@SnO2–AuNCs with an excellent CO yield of 64.8 μmol g–1 h–1 during CO2 photoreduction, which was higher than the role of separate application of AuNCs (25.3 μmol g–1 h–1) and AuNPs (16.0 μmol g–1 h–1). It was mainly attributed that the coaction of AuNPs and AuNCs not only enhanced the visible light absorption capacity but also improved the photogenerated carrier separation/migration. As a result, the electron-rich AuNCs induced from plasmonic AuNPs and photoexcited SnO2 promoted the photocatalytic CO2-to-CO performance. This work provides a new perspective to design multicomponent photocatalysts for highly efficient CO2 conversion.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 30
·10333-10341
·
IF 7.059
Jiaqi Sheng,Xiaofang Liu,Chengzhi Niu,Yufeng Sun,Yao Chen,Hengyang Wang,Bin Zhang,Guoyu Wang,Xiaoyuan Zhou,Guang Han
Bottom-up solution synthesis has been considered as a facile and energy-efficient approach for SnSe thermoelectric materials. Herein, we report a microwave-assisted hydrothermal method for the fast and controllable synthesis of SnSe with optimised thermoelectric properties. The NaOH concentration in solution precursors was demonstrated as a key factor influencing the phase composition, diameter, and morphology of the hydrothermal products as well as the thermoelectric properties of the corresponding sintered pellets. It is found that a NaOH : SnCl2 molar ratio of 30 leads to the formation of phase-pure SnSe microrods, and the pellet constructed from these rods obtains a maximum ZT of 1.08 and 0.78 at 773 K in parallel and perpendicular alignments to the pressing direction, respectively. These ZT values are significantly higher than the ZT value achieved by the pellet that was sintered from the hydrothermal powders prepared without NaOH and comprised the mixed phases of SnSe, SnO2, and SnSe2. This enhancement is primarily due to the improved power factor together with the lower lattice thermal conductivity owing to the significantly reduced fraction of SnO2 in the pellet. This study not only provides a microwave-assisted solution strategy for the fast, efficient, and controllable synthesis of SnSe materials, but also identifies the key synthesis parameters for securing better thermoelectric performance.
研究领域:
材料科学
·
能源材料
·
热电材料
✓ 已验证
DOI
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 45
·21917-21926
·
IF 6.97
Zhichao Lin,Jingjing Yan,Qingbin Cai,Xiaoning Wen,Hongye Dong,Cheng Mu
Co-modification of an electron transport layer (ETL) with metal oxides and organic molecules can optimize the structure of the ETL and improve the performance of perovskite solar cells (PSCs). Here, a sandwich-structured ETL consisting of MgO/SnO2/EA was designed by co-modifying a SnO2 ETL with magnesium oxide (MgO) and ethanolamine (EA). The device with an ETL modified with MgO and EA has excellent performance in enhancing electron transport and blocking holes. It also inhibits the formation of deep defect states and improves the stability of the device. The introduction of MgO effectively improves the open-circuit voltage (VOC) of the device, while EA increases the short-circuit current density (JSC). The optimal efficiency of the PSC using the ETL co-modified with MgO and EA is 20.23%, which is much higher than that of the device with the unmodified SnO2 ETL (17.94%). The method described here provides an effective way to develop high performance ETLs co-modified with metal oxides and organic compounds for perovskite-based optoelectronic devices.
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
Mineral Processing and Extractive Metallurgy Review
·
2017
·
IF 1.219
Zijian Su,Yuanbo Zhang,Bingbing Liu,Yingming Chen,Guanghui Li,Tao Jiang
A selective reduction volatilization (SRV) process developed by the authors was effective to remove tin from the complex tin-bearing iron concentrates. It is reported that many gangue minerals of quartz, calcite, and fluorite are existent in the concentrates. Our previous studies investigated the effect of quartz and calcite on the removal of tin. In this study, the effect of fluorite (calcium fluoride) was conducted, and pure CaF2 was added into the tin-bearing iron concentrates to investigate how CaF2 affected the tin volatilization behavior under different roasting conditions. The effect of CaF2 on the phase transformation of SnO2 was also determined using SEM-EDS and XRD. The results indicated that SnF2 was much easier to volatilize than SnO under CO-CO2 atmosphere in the presence of CaF2, so the calcium fluoride in the concentrates was beneficial to promote the tin removal during the SRV process.
研究领域:
冶金学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shuo Wang,Guangshe Li,Taotao Huang,Chang Liu,Xinbo Li,Qian Zhang,Yongcun Zou,Liping Li
The interface of substances at high temperature is completely different from that at room temperature, which gives a chance to create some unprecedented physical and chemical properties. These interface-dominated properties can significantly improve the carrier transport kinetics. In this paper, we report on the synthesis of heterogeneous catalysts involving P doped g-C 3 N 4 and SnO 2 , providing a first example of using high temperature interfacial chemistry to create P-Sn bonds between thermo-soften two-dimensional substance and hard oxide. Nuclear magnetic resonance (NMR) and X-ray photoelectron spectroscopy (XPS) data confirmed the presence of P-Sn bonds in the heterogeneous catalysts of P doped g-C 3 N 4 and SnO 2 during the rapid thermal quenching process. Owing to the promoted fast separation of photogenerated carriers, P-Sn bond enriched catalyst exhibits the best Cr(VI) photoreduction performance among the g-C 3 N 4 -based photocatalysts ever reported. Even at high Cr(VI) concentrations (at 500 ppm), this catalyst retains a high catalytic activity as well as good stability. High temperature interface chemistry produced by thermal quenching process will provide a universal methodology for constructing interfacial bonds and guiding the synthesis of new interfacial functional materials.
研究领域:
材料科学
·
环境科学
·
物理化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）