ACS Applied Energy Materials
·
2019
·
IF 0
Ting Qu,Qiang Tan,Yingjie Chen,Liting Liu,Shengwu Guo,Yuanzhen Chen,Yan Liu,Sai Li,Yongning Liu
Direct alcohol fuel cell technology (DAFC) has gained significant interest recently as it is a green energy technology with a low/zero pollution emission. Nevertheless, the sluggish kinetics of the electrocatalysis process and the high cost of anode catalysts still impede the wide application of DAFC. Moreover, the limited understanding of the reaction mechanism restrains the development of anode catalysts. Here, we have prepared a Pd-(SnO2@C)/C catalyst and highlighted a strategy to demonstrate the effects of active oxygen-contained species and electronic interaction, which are identified to have a synergistic effect. The as-prepared Pd-(SnO2@C)/C catalyst showed remarkable activity and stability for EOR and MOR in alkaline media. It also had an encouraging performance in a polymer fiber membrane-based alkaline DAFC, where a NiCo2O4 catalyst was used for the oxygen cathode. Combined with the theoretical analysis and the experimental research results, this study reveals that the electronic interaction is the dominant mechanism in the synergistic effect, which provides theoretical guidance and technical support for the preparation of the next generation of high catalytic activity and high stability anode catalysts of DAFC.
研究领域:
电化学
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催化
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能源材料
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燃料电池
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DOI
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 33
·15797-15812
·
IF 3.553
Weng Mingmei,Zhu Qi,Wang Aiwen,Liu Guanjin,Huang Honghao
Abstract A SnO 2 @β-Fe(Zr)OOH nanocomposite, β-FeOOH doped with Zr on SnO 2 hollow spheres, was synthesized by two-step hydrothermal method to solve the problem of nitrate pollution in sewage. The structure and properties of samples which synthesized in this work were analyzed by means of XRD, SEM, TEM, XPS, BET and Zeta potential systematically. Moreover, the effects of initial nitrate concentration, pH, time and temperature on nitrate removal were also investigated. The amount of nitrate nitrogen adsorbed by the SnO 2 @β-Fe(Zr)OOH nanocomposite was 14.0 mg/g in the first 30 min. Based on the analysis of the nitrate adsorption kinetic model of SnO 2 @β-Fe(Zr)OOH nanocomposite in water, the adsorption was in line with the second-order kinetic model and belonged to chemical adsorption. It showed that the Langmuir adsorption isotherm model fitting results are superior to the Freundlich isothermal adsorption model through fitting the adsorption isotherm. With the increase of temperature, the maximum adsorption capacity showed the same trend, which indicated that the adsorption process is an endothermic process. In addition, adsorption thermodynamic studies were carried out to prove that the reaction process is a spontaneous reaction. After six adsorption–desorption cycles, the composite still has an adsorption capacity of 80%. Graphic abstract
研究领域:
环境科学
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材料科学
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DOI
高影响因子
MICROCHIMICA ACTA
·
2022
·Vol. 189
·期 11
·1-15
·
IF 6.408
Qin Dongmiao,Meng Shuo,Wu Yusheng,Luo Zhi,Deng Biyang
An efficient electrochemiluminescence resonance energy transfer (ECL-RET) method is proposed which combines the luminescent materials of tris(4,4′-dicarboxylicacid-2,2′-bipyridyl) ruthenium(II) (energy donor) and tin dioxide and tin disulfide quantum dots (SnO 2 /SnS 2 QDs) (energy acceptor) into the isoreticular metal − organic framework-3 (IRMOF-3) material to form a composite. In this mode, the distance between the energy donor and the acceptor was greatly shortened, reducing the energy loss, and thereby effectively improving RET efficiency and further significantly improving the ECL signal. The obtained composite (SnO 2 /SnS 2 QDs-Ru@IRMOF-3) was combined with sandwich immunoreaction to construct an ECL immunosensor for the sensitive detection of procalcitonin (PCT). Under the optimized experimental conditions with a working potential of − 1.48 V (vs Ag/AgCl), the proposed PCT biosensor exhibited a linear concentration range of 1 × 10 −4 –200 ng mL −1 , with a detection limit of 0.029 pg mL −1 ( S / N = 3). The biosensor was used to detect PCT in actual samples. The biosensor has broad application prospects in biological analysis and clinical diagnosis due to its high sensitivity, good selectivity, and good stability. Graphical abstract
研究领域:
分析化学
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生物传感器
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临床诊断
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DOI
PubMed
高影响因子
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
·
2023
·
IF 3.3
Xueying Wang,Qian Ma,Qi Zhang,Yi Wang,Lingyu Li,Dongheng Zhao,Zhiqiang Liu
Porous double-channel α-Fe 2 O 3 /SnO 2 heterostructures with tunable surface/interface transport mechanism have been originally fabricated by the electrospinning and subsequent calcination process. With the increase of Sn content from 0 to 5 mol%, the morphology of α-Fe 2 O 3 -based materials changed from porous fibers to ribbons with both sides curled inward. Double-channel structure can provide more active sites and enhanced adsorption capacity with the large specific surface areas of 233.2 m 2 /g. The optimal α-Fe 2 O 3 /SnO 2 composites exhibit the highest response value (32.38) and fastest response/recovery times (33/58 s) than those of other samples to 100 ppm N,N-dimethylformamide (DMF) at 360 °C. Meanwhile, good cycling and long-term stability and high gas selectivity of the composites are conductive to the feasible detection to DMF under high temperature (≥360 °C) condition. The enhanced gas-sensitive properties of α-Fe 2 O 3 /SnO 2 composites at high temperature are closely related to phase composition, unique morphology, efficient n-n heterojunction and accelerated surface/interface charge transfer process. Significantly, the porous double-channel α-Fe 2 O 3 /SnO 2 composite is expected to be a potential candidate for DMF vapor detection in the dye or pesticide industry to prevent DMF explosion under high temperature conditions in the future.
研究领域:
材料科学
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传感技术
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Kungang Chai,Shizhao Zhang,Hongjie Liu,Shaopeng Wang,Zhenghua Chen,Kefu Yu,Liwei Wang
Higher resistance is exceptionally detrimental to metal oxide-based electrochemical sensors' detection performances that depend on their electrical conductivity. Herein, guided by the synergistic effect of the heterophase boundary, a hollow core–shell combination with a double-layered structure was engineered via hydrolysis strategy, namely nitrogen-doped carbon hollow nano-microspheres (N C HNMs) coated with SnO 2 outer layer (N C@SnO 2 HNMs), then applied for high-performance electrochemical sensing. Advantages including large surface area and strong electronic coupling of Sn-C bond on the boundary facilitated the adsorption of target molecules and electron transferring across the composites, achieving efficient quantitative identification. Density functional theory (DFT) calculation demonstrated the motivation of the charge accumulation at the interface due to the formation of the Sn-C bond, which acted as a bridge for charge transfer. Unsurprisingly, the N C@SnO 2 HNMs-based electrode showed an excellent performance toward dopamine (DA), such as favorable DA selectivity, a lower limit of detection, and a wide linear detection range. Moreover, the electrode material could be applied to the microsensor for in-situ DA detection in artificial sweat.
研究领域:
材料科学
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电化学
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纳米技术
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传感器
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Hang Zhong,Wenbo Li,Yin Huang,Duoling Cao,Congqiang Zhang,Huaxi Bao,Zhiguang Guo,Li Wan,Xu Zhang,Xiuhua Zhang,Yuebin Li,Xiaoming Ren,Xianbao Wang,Dominik Eder,Kai Wang,Shengzhong Frank Liu,Shimin Wang
All-inorganic CsPbI3 perovskites have great potential in tandem cells in combination with other photovoltaic devices. However, CsPbI3 perovskite solar cells (PSCs) still face a huge challenge, resulting in a low power conversion efficiency (PCE) relative to organic–inorganic PSCs. In this work, we introduced tetrabutylammonium acetate (TBAAc) as a buffer layer between the SnO2 electron-transport layer (ETL) and CsPbI3 all-inorganic perovskite film interface for the first time. TBAAc not only improved the conductivity of SnO2 ETL but also formed a 1D TBAPbI3 layer between the SnO2 ETL and the 3D CsPbI3 all-inorganic perovskite film, thereby enhancing the stability and passivating the surface defects of the CsPbI3 perovskite to fabricate high-efficiency carbon-counter electrode (CE)-based CsPbI3 solar cells. We fabricated carbon-CE-based hole-transporting layer ( HTL)-free PSCs with an FTO/SnO2/TBAAc/CsPbI3/C structure. The open-circuit voltage (Voc), short circuit current density (Jsc), PCE, and fill factor of the champion CsPbI3 PSCs simultaneously enhanced to 1.08 V, 17.48 mA/cm2, 12.79, and 67.8%, respectively. This PCE is currently one of the high efficiencies reported for the above planar-structured carbon-CE-based CsPbI3 PSCs to date. Moreover, the optimized device exhibits excellent stability, which retained over 83% of its initial PCE after 350 h. This work provides a facile way of simultaneous optimization of the SnO2 ETL and the CsPbI3 perovskite layer to fabricate stable and high-efficiency carbon-CE-based CsPbI3 PSCs.
研究领域:
材料科学
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可再生能源
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光伏技术
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2023
·
IF 11.9
Zhenkuang Lei,Mingqiang Ning,Xueheng Zhuang,Qikui Man,Baogen Shen
The engineering of heterogeneous interfaces is an effective way to develop high-performance electromagnetic wave (EMW) absorbing materials. In this work, density functional theory (DFT) calculations were used to predict the SnO2/SnS2 heterointerface effect for boosting electromagnetic wave loss. Then a method for constructing SnO2/SnS2 heterostructures by modulating the SnO2 precursor on carbon cloth (CC) with controlled sulfurization is proposed. Benefiting from the introduction of SnO2/SnS2 heterostructures, the S-2 absorber achieves a minimum reflection loss (RLmin) of −50.9 dB and maximum EAB up to 4.18 GHz with a matching thickness of 5.0 mm and 1.5 mm. Moreover, the materials also exhibit strong hydrophobicity and high electrical conductivity, giving them potential applications such as self-cleaning, and good electrical and thermal properties. This study provides an insight into the mechanism of heterogeneous interfaces for enhancing the attenuation capability of EMW and opens avenues for developing high-performance absorbers.
研究领域:
材料科学
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电磁学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kailin Chi,Yuechen Zhai,Yao Wang,Xin Zhang,Fucheng Liang,Shibo Wang
The achievement of complete conversion of PbBr 2 films presents a significant challenge in the development of CsPbBr 3 films with consistent growth, comprehensive coverage, and controllable components. To address this challenge, introducing a porous structure in the planar PbBr 2 film is advantageous for facilitating the immersion of CsBr precursor, thereby reducing impurity phase formation and mitigating strain caused by the film volume expansion. In order to accomplish this, indium tribromide (InBr 3 ) was employed as an additive and the InBr 3 (DMF) 3 adduct was utilized to expedite the release of organic molecules in PbBr 2 (DMF), resulting in the transformation of planar PbBr 2 film into porous structures. The growth orientation of PbBr 2 crystals was altered by this transformation, effectively suppressing the generation of metallic Pb impurities in the film. Additionally, it not only optimizes the morphology of CsPbBr 3 film but also reduces impurity phase. As a result, the InBr 3 :CsPbBr 3 perovskite solar cell achieved an efficiency of 7.28 %. The majority of In 3+ ions were concentrated near the buried interface between SnO 2 and InBr 3 :CsPbBr 3 , leading to significant improvements in both non-radiative recombination defect states within the perovskite film and electron injection and collection capabilities within the device.
研究领域:
材料科学
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太阳能
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光伏技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Dongxue Fan,Kai Cui,Yang Li,Caiqin Miao,Qun Wang,Xiaohong Wu
Flexible perovskite solar cells (F-PSCs) have demonstrated remarkable potential for next-generation wearable platforms. Nonetheless, the reduction of open-circuit voltage (VOC) at the interface within F-PSCs poses a significant barrier to improving the photoelectric conversion efficiency (PCE). Herein, we reported an effective “two birds with one stone” strategy by utilizing carbon dots (CDs) as a multifunctional treatment modulator to modify the SnO2 electron transport layer (ETL) and buried interface. On the one hand, CDs were explored to passivate trap states associated with Sn dangling bonds and oxygen vacancies on SnO2 surfaces through Lewis acid–base coordination, thereby enhancing the electron mobility of SnO2 films and facilitating charge extraction from perovskite layers. On the other hand, the functional groups (including carboxyl, fluorine, and amino) on CDs enable the formation of coordination and hydrogen bonding with PbI2, promoting the formation of high-quality perovskite films with reduced defect densities. The collective enhancements effectively mitigate trap-assisted charge recombination and interfacial energy loss, significantly reducing the device voltage deficit and enabling F-PSCs to attain a PCE of 22.97% with enhanced VOC from 1.06 to 1.18 V. Notably, CDs-incorporated devices demonstrate exceptional operational durability, maintaining 83% of initial PCE after 400 h of continuous illumination (AM 1.5G) in an air atmosphere and retaining 81% PCE following 4000 cyclic bending tests (6 mm radius). This methodology establishes a robust framework for simultaneously enhancing both the efficiency and stability in FAPbI3-based F-PSCs.
研究领域:
材料科学
·
能源技术
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Yutang Kang,Jiahao Chen,Shasha Feng,Huixian Zhou,Fangqi Zhou,Ze-Xian Low,Zhaoxiang Zhong,Weihong Xing
Particulate matters (PMs) emissions from energy consumption contribute the vast majority of PM pollution, which are typically associated with high temperatures (>300 °C) and are difficult to remove directly at high temperatures. Electrospinning nanofiber membranes have irreplaceable advantages of high removal efficiency and low pressure drop for PMs filtration, however, the efficient filtration of PMs at high temperature is challenging for polymer-based nanofiber membranes because of the poor heat resistance and inflammability. Herein, we design a thermally-oxidized polyacrylonitrile/polyvinylpyrrolidone/SnO 2 (OPAN/PVP/SnO 2 ) nanofiber membrane by performing the thermally induced cyclization and oxidation reaction of PAN/PVP/SnCl 2 nanofiber membrane at 350 °C in air. During the thermal oxidization process, Sn 2+ acted as a catalyst and activation, preventing the melting and fusion of PAN nanofibers. The addition of PVP greatly increased the mechanical properties of OPAN/SnO 2 nanofiber membrane. The prepared OPAN/PVP/SnO 2 nanofiber membrane possesses superior PMs filtration performance at room temperature, with the PM 0.3 and PM 2.5 filtration efficiency of 99.53% and 99.98%, respectively. The OPAN/PVP/SnO 2 nanofiber membrane exhibits high temperature tolerance up to 350 °C and wide pH tolerance of 1–14, it remains a high PMs removal efficiency of 98.51% at 350 °C and 98.67% at 300 °C. Moreover, the OPAN/PVP/SnO 2 nanofiber membrane shows excellent fire retarding and self-extinguishing property not shown in pristine PAN nanofiber membrane. This work provides a novel approach for clean use of energy via a cost-effective, heat-resistant, and flame-retardant nanofiber membrane.
研究领域:
环境科学
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材料科学
·
纳米技术
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2020
·
IF 3.557
Xinting Han,Junyan Peng,Shaohua Jiang,Jian Xiong,Yu Song,Xiao Gong
Good mechanical and chemical stabilities are the key factors for the wide application of superhydrophobic surfaces. In this work, we first prepared raspberry-like hollow structured SnO2 nanoparticles using a simple hydrothermal method, followed by an annealing step. Then, the intrinsic raspberry-like hollow SnO2 nanoparticles were combined with hydrophilic SiO2 nanoparticles to construct rough surfaces with suitable hierarchical structures, and 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS-17) was used as a hydrophobic modifier of SnO2, while epoxy resin was used as an adhesive to prepare a superamphiphobic coating with good stability and durability. Such a coating can be applied on various substrates using a simple spray-coating or drop-coating method. The water contact angle and diiodomethane contact angle of the coating could reach up to ∼165 and ∼151°, respectively. After various chemical and mechanical stability tests including hot water treatment, salt water corrosion, strong adhesive tape peeling, and kneading, the coatings still remained amphiphobic. The facile fabrication of the robust superhydrophobic coating has great potential for applications in real life and industrial production.
研究领域:
材料科学
·
表面化学
·
纳米技术
·
涂层与薄膜
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Xiangjuan Ma,Yan Yan,Qizhou Dai,Jianxian Gao,Shengjue Liu,Yijing Xia
This study focused on the electrochemical oxidation of Acid Blue 9 (AB 9) under direct and pulse current modes using a Ti/SnO 2 -Sb/α,β-Polytetrafluoroethylene-Fe-PbO 2 (PTFE-Fe-PbO 2 ) anode. The results showed that 99.0% of AB 9 and 68.9% of COD could be eliminated at initial pH of 5, initial AB 9 concentration of 100 mg L -1 , pulse frequency of 4000 Hz, current density of 20 mA cm −2 and pulse duty cycle of 50% after 120 min of electrolysis. The pulse electrochemical oxidation of AB 9 at the investigated conditions followed pseudo-first-order kinetics. Compared with the direct current mode, 76.0% of energy consumption could be saved at pulse current mode. The effect of mass transfer and electrode distance on the pulse electrochemical oxidation of AB 9 was also investigated in terms of mass transfer coefficient and effectiveness factor, the results showed that the reduced electrode distance was beneficial to improve the mass transfer and oxidation efficiency, as well as the energy efficiency. LC-MS analysis revealed that benzenesulfonate group, C-N and C-S bonds in AB 9 molecule were initially cleaved under the attack of ⋅OH, then some carboxylic acids were formed and eventually mineralized to CO 2 and H 2 O. Therefore, pulse electrochemical oxidation with a PTFE-Fe-PbO 2 electrode might be a promising alternative to enhance the practicability of electrochemical treatment for dye wastewater.
研究领域:
环境工程
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电化学
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废水处理
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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）