JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2014
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IF 3.552
Jian-Wen Shi,Hui-Ying Ai,Jian-Wei Chen,Hao-Jie Cui,Ming-Lai Fu
Composite photocatalysts composed of nitrogen-doped anatase TiO 2 plates with exposed {0 0 1} facets (NTS) and graphene nanosheets (G) were firstly synthesized by a facile one-pot hydrothermal process. The morphologies, structural properties, and photocatalytic activities of the resultant NTS/G composites were investigated in detail. Graphene nanosheets were demonstrated play three important roles in the NTS/G composites, as transporter of photo-excited electrons, extender of light absorption range and enhancer of adsorptive capacity, respectively. Due to the effective charge anti-recombination, the efficient utilization of the visible light and the high adsorptive capacity to target pollutants, the composites exhibited significant improvement in photocatalytic degradation of methylene blue under visible light irradiation. Based on the results, the mechanism of enhanced visible-light photocatalytic activity on NTS/G composites was proposed.
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JOURNAL OF MEMBRANE SCIENCE
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2015
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IF 5.056
Wenbin Shi,Linjun Zhang,Jie Deng,Dongsheng Wang,Shudong Sun,Weifeng Zhao,Changsheng Zhao
Redox-responsive materials have attracted much attention, and redox-responsive membrane is strongly desired since enormous numbers of redox reactions carry out in living systems. Herein, a novel polymeric membrane with redox-resposive hydraulic permeability is fabricated by introducing a reversible redox-responsive system based on the host–guest complex between ferrocene (Fc) and β-cyclodextrin (β-CD) into polyethersulfone (PES) membrane. As the result of reversible redox-responsive formation or deformation of the complex, the water flux for the membrane with 18.3 wt% redox-responsive materials was 270 mL/m 2 mmHg h in original state, while increased to 1022 mL/m 2 mmHg h in oxidation state and decreased to 538 mL/m 2 mmHg h in reduction state. In addition, the results of water contact angle, surface zeta potential and the gas flow/liquid displacement confirmed that the origin of the redox-responsive hydraulic permeability were the change of the pore size and porosity for the modified membranes. The redox-responsive membranes have great potential to be utilized in the fields of chemical detection, drug delivery, biological treatments and so on.
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JOURNAL OF CRYSTAL GROWTH
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2015
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IF 1.698
Huacheng Cai,Wendong Wang,Peiwen Liu,Guangming Wang,Ankang Liu,Zhe He,Zhaofang Cheng,Shengli Zhang,Minggang Xia
We demonstrate tin (Sn) nanowires growth enhanced by Selenium (Se) atoms via physical vapor transport (PVT) method. The Raman spectroscopy, X-ray diffraction, scanning electron microscopy and high-resolution transmission electron microscopy show that Sn nanowires are synthesized with a large quantity, good quality and high purity of Sn. The growth of Sn nanowires is attributed to Solid–Vapor–Liquid mechanism. The effects of gold nanoparticles catalyst, Si substrate, and Se atoms on Sn nanowires growth are discussed in detail. We find that Se atom plays a key role in the growth of Sn nanowires. The gaseous Sn atoms are absorbed by the eutectic alloy droplets of Se–Au at first. Then Sn atoms precipitate at the liquid–solid phase interface due to a supersaturated solution and form a one-dimensional nanostructure. In all, this PVT method could provide a simple and quick way to synthesize monocrystalline Sn nanowires with an advantage in both quality and quantity. The optical transmittance of Sn nanowires thin film with 2 μm 2 density approaches 85–90% in visible wavelength. Therefore, the Sn nanowires thin film can be applied to transparent electrode along with their metallic property.
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SURFACE & COATINGS TECHNOLOGY
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2017
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IF 2.589
K.Q. Song,Z.C. Lu,M. Zhu,R.Z. Hu,M.Q. Zeng
Nanocomposite Al–Sn-based bearing alloys produced by mechanical alloying (MA) exhibit high hardness; however, their poor sintering density and ductility limit their wide spread application. Here, we present a strategy to produce a dual-scale structure in an Al–Sn–Si alloy consisting of coarse and ultrafine grains through a combination of conventional powder sintering and thermomechanical treatment . We found that severe deformation and the presence of an Al–Si eutectic mixture for sample induced abnormal grain growth of Al to create the dual-scale Al–Sn–Si alloy through annealing treatment. An optimum matching of ductility and strength , and optimum wear performance were achieved at annealing temperatures of 500 and 550 °C. Detailed investigation of the wear mechanism revealed that the combination of high strength and high ductility provided by the dual-scale structure is a key factor for the improvement of the wear properties.
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ENVIRONMENTAL ENGINEERING SCIENCE
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2024
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IF 1.8
Longjin Tian,Ying Liu,Wen Qiu,Guozhi Fan,Cheng Pan,Qunpeng Cheng
To solve the bottleneck of low degradation rate and low biogas yield in anaerobic digestion of food waste, the addition of anionic surfactant sodium N-lauroylsarcosinate (SN) and nonionic surfactant primary alcohol ethoxylate (AEO) were proposed. The results showed that both surfactants could promote the methane production and facilitate the degradation of food waste. The highest methane yield per mass of volatile solid was obtained in 0.1 g/L AEO (497.14 mL) and 1 g/L SN (445.51 mL), which was improved by 92% and 72% compared with the control group. While with the increase of surfactant concentration, methane yield was decreased due to negative effect caused by the surfactant. This corresponded with the variation of pH, total volatile fatty acids (TVFAs), and soluble chemical oxygen demand (SCOD). The microbial community analysis showed that the relative abundance of methanobacterium increased while the relative abundance of methanosaeta decreased after the addition of surfactant. Meanwhile, the methane production pathway was shifted from codominance of hydrogenotrophic and aceticlastic methanogens to predominance by hydrogenotrophic methanogens in the groups with low concentration of AEO and SN.
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Nature Energy
·
2024
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IF 49.7
Yu Danni,Pan Mengling,Liu Gaoqi,Jiang Xianyuan,Wen Xin,Li Wenzhuo,Chen Shaojie,Zhou Wenjia,Wang Hao,Lu Yue,Ma Mingyu,Zang Zihao,Cheng Peihong,Ji Qingqing,Zheng Fan,Ning Zhijun
Tin–lead mixed perovskite-based tandem solar cells show promise. However, the inherent oxidation of tin remains a challenge for achieving high power conversion efficiency and device stability. In this study, we present an approach to address this challenge by developing an electron-withdrawing chloromethyl phosphonic acid ligand based on the substituent effect, designed to mitigate tin oxidation in tin–lead mixed perovskite materials. The introduction of this electron-withdrawing ligand improves the redox potential of the tin adduct. Furthermore, it leads to a substantial increase in the ionization potential of the perovskite structure. Through comparative analysis with conventional coordinating molecules, we reveal that the electron-withdrawing ligand is more effective in suppressing tin oxidation and reducing the defect density within the tin-based perovskite film. Using our approach, we demonstrate certified efficiency of 26.96% for all-perovskite tandem solar cells.
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ACS Sustainable Chemistry & Engineering
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2024
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IF 7.1
Xiaoquan Han,Tianqi Li,Jianxun Zhao,Shang Gao,Jing Zhao,Wanqiang Liu
Despite the recent resurgence of rechargeable aqueous zinc batteries (RAZBs), challenges persist for Zn metal anodes, including dendrite growth and corrosion in mild aqueous electrolytes during cycling. Developing a simple and effective solution is crucial. This study introduces a one-step strategy to create a protective layer at room temperature comprising the superconductor Nb3Sn and embedded Zn foil. The Nb3Sn–Zn composite, with a high Zn2+ transfer number and uniform nucleation sites, exhibits excellent zinc affinity and synergistic effects. This composite effectively inhibits dendrite growth by controlling Zn nucleation and prevents Zn corrosion and hydrogen evolution by shielding the Zn metal surface from electrolyte attack. The Nb3Sn–Zn composite shows remarkable electrochemical properties, including a low voltage hysteresis, high Coulombic efficiency, and prolonged cycling stability. Furthermore, a full cell utilizing the Nb3Sn–Zn anode and MnO2 cathode demonstrates superior rate capability and cycle life stability. The present research introduces an innovative methodology for the design of dendrite-free Zn anodes suitable for practical applications.
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Chemical Science
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2024
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IF 7.6
Wei-Xing Chen,Zi-Sheng Li,Harry W. T. Morgan,Cong-Cong Shu,Zhong-Ming Sun,John E. McGrady
We report here the synthesis and characterization of two endohedral Zintl-ion clusters, [Fe4Sn18]4− and [Fe4Pb18]4−, which contain rhombic Fe4 cores. The Fe–Fe bond lengths are all below 2.5 Å, distinctly shorter than in the corresponding Cu clusters, indicating the presence of Fe–Fe bonding. Subtle differences in the structure of the Fe4 core between the two clusters suggest that the change in tetrel element causes a change in electronic ground state, with a very short Fe–Fe bond length of 2.328 Å present across the diagonal of the rhombus in the lead case.
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Small
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2024
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IF 13
Siyi Hong,Leiming Wu,Zizhen Xiao,Yinxiang Chen,Artem Kuklin,Huating Liu,Hans Ågren,Xiaohui Ren,Ye Zhang
Few-layer tin (Sn)-based nanosheets (NSs) with a thickness of ≈2.5 nm are successfully prepared using a modified liquid phase exfoliation (LPE) method. Here the first exploration of photo-electrochemical (PEC) and nonlinear properties of Sn NSs is presented. The results demonstrate that the PEC properties are tunable under different experimental conditions. Additionally, Sn NSs are shown to exhibit a unique self-powered PEC performance, maintaining a good long-term stability for up to 1 month. Using electron spin resonance, active species, such as hydroxyl radicals (·OH), superoxide radicals (·O 2 − ), and holes (h + ), are detected during operations, providing a deeper understanding of the working mechanism. Furthermore, measurements of nonlinear response reveal that Sn NSs can be effective for all-optical modulation, as it enables the realization of all-optical switching through excitation spatial cross-phase modulation (SXPM). These findings present new research insights and potential applications of Sn NSs in optoelectronics.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
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IF 15.7
Wu Meng,Liu Xinyu,Liu Hong,Li Dabing,Qi Xiang,Zeng Jianrong,Gao Lei,Nan Ce-Wen,Fan Li-Zhen
Designing halide solid electrolytes with high ionic conductivity and good (electro)chemical stability is essential for the advancement of all-solid-state sodium-ion batteries. Unfortunately, most sodium-based halide solid electrolytes experience limited ionic conductivities and ambiguous correlations between their structure features and ion transport properties. Here we report a design strategy to boost the conductivities of sodium halides by regulating vacancy and charge carrier concentrations through a facile Na- and Cl-deficient compositions method. This approach achieves a balanced structure with optimal vacancy and carrier content, rendering several-fold conductivities enhancement of series sodium halides. Furthermore, a fluorination-induced amorphization protocol is employed to enhance (electro)chemical stability and interfacial compatibility without detrimentally influencing conductivities. The promoted conductivities of the fluorinated sample are primarily due to increased local structural disorder and enhanced prismatic Na coordination. When paired with an uncoated Na 3 V 2 (PO 4 ) 3 positive electrode and a Na 3 PS 4 -coated Na 15 Sn 4 negative electrode, the Na 0.5 ZrCl 4 F 0.5 catholyte enables the battery to run for 300 cycles, retaining 94.4% of its initial discharge capacity at room temperature. This study provides a versatile pathway for creating inorganic ion conductors with high conductivity and long-term cyclability, advancing the development of all-solid-state sodium-ion batteries.
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Journal of Materials Chemistry C
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2025
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IF 5.1
Gaoning Fan,Weishuai Duan,Mengjiao Dong,Xueting Luo,Pengyu Zhou,Chun Sun,Yonghui Zhang,Mengjun Wang,Chao Fan
As a member of two-dimensional materials, tin disulfide (SnS2) holds great potential for highly sensitive detectors used in high-resolution, low-power imaging. Nevertheless, SnS2-based detectors face challenges, such as a narrow detection range, low responsivity, and slow response speed. In this work, gate-modulated phototransistors based on a tin monoselenide/tin disulfide (SnSe/SnS2) heterostructure were fabricated, demonstrating a spectral response from visible to near-infrared. The phototransistors exhibited a maximum responsivity of 2667.1 A W−1 and an extremely high detectivity of 1.02 × 1013 cm Hz1/2 W−1 under 405 nm illumination. Additionally, they exhibited an extremely high responsivity of 537.6 A W−1 and a high external quantum efficiency of 78.3 × 104% under 850 nm illumination. The photodetection performance could be modulated by the back-gate voltage. At a back-gate voltage of 50 V, the phototransistor achieved an enhanced responsivity of 4002.9 A W−1, surpassing detectors based on individual components and most other two-dimensional materials. This work provides an effective strategy for achieving gate-modulated photodetection performance and broadens the scope of applications for SnS2-based detectors.
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ACS Applied Materials & Interfaces
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2024
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IF 8.3
Ze Li,Wen-Jie Li,Jun Guo,Zi-Yuan Wang,Xing Yang,Yu-Ke Zhu,Tian-En Shi,Yi-Xin Zhang,Jing Feng,Zhen-Hua Ge
SnSe materials have attracted extensive attention in thermoelectrics due to their low thermal conductivity. Nevertheless, the thermoelectric properties of n-type polycrystalline SnSe are still low, and metallic Sn distributed in the SnSe1–x materials would affect the repeatability of thermoelectric performance. Herein, the thermoelectric properties of n-type polycrystalline SnSe0.95-based composites are highly enhanced by heterogeneous Cu doping. The carrier concentration of the SnSe0.95 material was optimized by SnCl2 doping. The strategy of heterogeneous Cu doping is employed in further improving the thermoelectric performance of the SnCl2-doped SnSe0.95 materials. In addition, partial Cu+ doping tunes the electron concentration to enhance the Seebeck coefficient. Moreover, metallic Sn distributed along the grain boundaries can be stabilized by forming Cu6Sn5 alloys, which improve the thermal stability of bulk composites. Excessive Cu particles and SnCl2 precipitates strengthen phonon scattering for lowering the lattice thermal conductivity. Ultimately, a peak ZT of 1.55 is yielded at 773 K in the SnSe0.95–1 wt % SnCl2–1 wt % Cu bulk composite, whose mechanical hardness is also increased. Hence, these results promote a feasible approach to simultaneously enhance the thermoelectric and mechanical properties of n-type SnSe-based composites, which might be worth exploring in other thermoelectric materials.
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