SEPARATION SCIENCE AND TECHNOLOGY
·
2016
·
IF 1.083
Zijian Su,Yuanbo Zhang,Jun Chen,Bingbing Liu,Guanghui Li,Tao Jiang
In this study, a process of magnetizing roasting followed by magnetic separation, which is used to separate or recover tin and iron from the high calcium type tin- and iron-bearing tailings (containing 35.53 wt.% Fe and 0.56 wt.% Sn), was investigated . A magnetic concentrate containing 66.3 wt.% Fe and 0.07 wt.% Sn with an iron recovery rate of 92.9 wt.% was obtained under optimal conditions: anthracite ratio of 2.5:100, roasting temperature of 850°C, roasting time of 30 min, grinding time of 10 min, and magnetic field intensity of 0.1 T. In addition, the effect of roasting parameters on the separation of iron and tin and phase transformation of SnO2 was investigated by using X-ray powder diffraction, Scanning Electron Microscopy–Energy Dispersive Spectroscopy, etc.
研究领域:
冶金学
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矿物加工
·
材料科学
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产品关联
DOI
高影响因子
Nanoscience and Nanotechnology Letters
·
2017
·Vol. 9
·期 12
·1947-1952
·
IF 1.889
Wu Han,Zhou Liyan,Yan Shancheng,Song Haizeng,Shi Yi
Recently, layered IV–VI metal monochalcogenides have attracted a lot of attention because of their unique properties. Among them, tin monoxide (SnO) has been widely studied as thin films for the application in high-mobility p-channel transistor and photoelectricity device
fabrication. In this work, we successfully synthesized SnO nanoshells through a facile solution chemical method. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images confirmed the morphology of these nanoshells. The surface chemical composition was investigated
by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Raman and photoluminescence spectra were used to study the optical properties of nanoshells with different sizes, which were formed in different concentrations. We found that the special nanostructure may result in abundant
Sn or O vacancies on the surface of nanoshells, and these defects resulted in a broad photoluminescent signal. This work provided a solution synthesis method to prepare SnO and other IV–VI metal monochalcogenides as well as their promising applications in optical device.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Zhen Li,Yajun Chen,Shuangjiang Li,Yunfei Zhi,Yonghao Ni,Lei Tao,Shaoyun Shan
Heat-insulating clear coatings have been widely studied and used in energy conservation of buildings. In this article, tungsten-doped tin dioxide (WTO) nanoparticles were synthesized by a facile hydrothermal approach. The effects of molar doping ratios of tungsten, calcination temperatures of the WTO precursor, and hydrothermal synthesis temperatures on the phase composition and optical properties of WTO powder were investigated. The conditions for the preparation of WTO with better optical properties are as follows: the hydrothermal temperature is 180 °C, the molar doping ratio of tungsten is 1%, and the hydrothermal product is calcined at 900 °C. A possible mechanism of the optical properties of nano-WTO powder was proposed, in which tungsten ions provide carriers for tin oxide. It is worth mentioning that this is the first report on the synthesis of WTO nanoparticles and the development of their near-infrared light shielding properties.
研究领域:
材料科学
·
能源与环境科学
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DOI
高影响因子
Nature Energy
·
2026
·
IF 70.1
Ma Tianshu,Zhao Yue,Zhu Jingwei,Yin Xinxing,An Yidan,Chen Cong,Shang Minghui,Wang Huayang,Wu Zhanghao,Liu Yuhui,Chen Chen,Guan Yuxiang,Luo Jincheng,Zhang Jing,Li Minghui,Xiao Chuanxiao,Yao Fang,Lin Qianqian,Yang Zhenhai,Cao Guoyang,Wang Changlei,Zhao Dewei,Li Xiaofeng
Low-bandgap ( E g ~ 1.25 eV) tin–lead perovskite solar cells hold great potential for constructing efficient all-perovskite tandem solar cells (TSCs). However, rapid degradation of perovskite precursor solutions, owing to easy oxidation of Sn 2+ , remains a major challenge. Here we elucidate oxidation pathways in Sn–Pb perovskite precursors. We further introduce basic amino acids and basic amino acids sulfate (BAAS) as proton scavengers, which stabilize the ink for over 300 days. BAAS neutralizes excess protons to mitigate dimethyl sulfoxide-driven oxidation reactions, whereas sulfate ions coordinate Sn 2+ to passivate defects and regulate crystallization. The optimized low-bandgap perovskite solar cell achieves a power conversion efficiency of 24.06% with an open-circuit voltage of 0.905 V, enabling two-terminal all-perovskite TSCs with a power conversion efficiency of 30.24% (certified 29.56%). The BAAS-passivated TSCs retain over 85% of their initial performance after 1,000 hours of the maximum power point operation under 1-sun illumination.
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DOI
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 10
·4698-4704
·
IF 3.5
Jing-Ning Lv,Jie Zhang,Yu-Meng Liu,Shao-Ya Zhang,Xiang-Yuan Deng,Man Xu,Xiao-Wu Lei,Zhi-Wei Chen,Cheng-Yang Yue
Considering the instability and toxicity of 3D Pb-based perovskite nanocrystals, lead-free low-dimensional organic–inorganic hybrid metal halides have attracted widespread attention as potential substitutes. Herein, two new tin-based 0D halides [H4BAPP]SnBr5·Br and [H4BAPP]SnCl5·Cl·H2O (BAPP = 1,4-bis(3-aminopropyl)piperazine) were synthesized successfully based on [SnX5]3− as an emission center. Typically, [H4BAPP]SnBr5·Br and [H4BAPP]SnCl5·Cl·H2O display broadband yellow and yellow-green light emissions originating from the radiative recombination of self-trapped excitons (STEs). The photoluminescence quantum yields (PLQYs) of the two compounds were calculated to be 19.27% and 2.36%, respectively. Furthermore, the excellent chemical and thermal stability and broadband light emissions reveal their potential application in solid-state white lighting diodes.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2026
·
IF 3.4
Yingshi Su,Sijie Chen,Ting Zhang,Weiran Zheng
Fluorine-doped tin oxide (FTO) is ubiquitously employed as a transparent conducting substrate in spectroelectrochemical and photoelectrochemical applications, yet its intrinsic optical stability under operando conditions has not been systematically evaluated. Here, we use operando ultraviolet–visible spectroelectrochemistry, complemented by liquid-phase atomic force microscopy, to track the real-time optical evolution of FTO in three representative aqueous electrolytes (0.5 M H2SO4, 1.0 M KCl, and 1.0 M KOH) under both cyclic voltammetry (CV) and chronoamperometry. We establish a two-signature diagnostic framework that distinguishes reversible, potential-tracking absorption edge shifts arising from Fermi-level modulation of the Burstein–Moss effect from irreversible degradation manifesting as either selective absorption edge redshifting (surface dedoping) or a broadband absorbance increase (roughening and scattering). Under CV cycling, FTO remains optically stable in most electrolyte-potential window combinations, with notable exceptions: cathodic cycling in KCl induces irreversible baseline shifts via Sn–Cl complexation, and anodic cycling in KOH causes progressive dedoping through hydroxide-mediated dissolution. Chronoamperometric experiments at fixed cathodic (−0.4 VRHE) and anodic (1.8 VRHE) potentials reveal that sustained polarization substantially amplifies degradation beyond what cycling predicts, even for conditions deemed safe under CV. Critically, the Faradaic current magnitude proves to be a poor predictor of optical damage: H2SO4 generates the largest anodic current yet shows minimal spectral change, whereas KCl produces negligible current but measurable optical degradation through chemical corrosion. These findings provide electrolyte- and potential-specific stability maps and practical guidelines to prevent misattribution of substrate-driven optical artifacts to deposited catalysts or active layers in operando spectroelectrochemical studies.
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2024
·Vol. 59
·期 5
·1958-1967
·
IF 3.5
Tang Haifeng,Yan Bingzhen,Zhang Peigen,Yin Xiaodan,Tian Zhihua,Das Mahapatra Susmriti,Zheng Wei,Tang Jingwen,Sun ZhengMing
Micro- and nano-sized one-dimensional (1D) metallic materials exhibit tremendous potential in various technological applications such as flexible and transparent electrodes, sensing, and catalysis. However, achieving eco-friendly and large-scale fabrication of diverse 1D metals remains a formidable challenge. The occurrence of A-site whisker growth from MAX phase presents an opportunity for developing an innovative 1D metal fabrication technique. Herein, we investigate the significant role of oxygen in promoting whisker growth from mechanically damaged Ti 2 SnC MAX phase. Our findings reveal that oxidation of the M-site (titanium) in Ti 2 SnC phases enhances the formation of atomized tin, which plays a crucial role in tin whisker growth. Furthermore, by employing alternative MAX phase precursors, this technique demonstrates the potential to fabricate 1D metals beyond tin. The diverse A-site elements in MAX phases suggest that this approach could serve as a universal strategy for synthesizing various 1D metallic materials. Graphical abstract
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shi Chen,Libin Wang,Xianluo Hu
Electrode materials are the key to electrochemical energy storage devices like supercapacitors. However, current materials can hardly meet the charge-storage capacity and/or operability requirements of practical scenarios in harsh low-temperature conditions. Here we report the advancement in photothermal-assisted supercapacitors operable at −40 °C using an electrochemically active and photothermal electrode material of commercially available TiN nanocrystals. Bifunctional TiN shows broad light absorption (>98%) in the whole solar spectrum and high photothermal conversion efficiency (62.5%). Even in an open atmospheric environment, the photochemical effect boosts the device with a considerable temperature rise from −36.6 °C to −10.8 °C under 1 solar illumination. Meanwhile, the as-fabricated device exhibits highly stable and reversible charge-storage capability. Its capacitance is enhanced by 38.0% at 5 mV s −1 at −40 °C, achieving 70.9% of the capacitance at 25 °C. The energy density is improved by 81.1% at 140 mW cm −2 at −40 °C, reaching 59.3% of the capacitance at 25 °C. The route for preparing TiN inks and fabricating screen-printed devices is simple and cheap, which is suitable for industrial mass production. The self-heating integration approach provides a promising strategy for designing new functionalized energy-storage devices with low temperature resistant features.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Energy Research
·
2021
·
IF 4.008
Hao Jiawen,Song Xueping,Jia Shaowu,Mao Wei,Yan Yuxiao,Zhou Jinghong
Heteropoly acids containing Brønsted and Lewis acids show excellent catalytic activity. Brønsted acids promote the depolymerization of polysaccharides (such as starch and cellulose) into glucose, while Lewis acids catalyze the conversion of glucose to 5-hydroxymethylfurfural (HMF). Designing stable Brønsted-Lewis acid-containing bifunctional heterogeneous catalysts is crucial for the efficient catalytic conversion of polysaccharides to HMF. In this study, a series of Brønsted -Lewis acid bifunctional catalysts (SnxPW, X = 0.10–0.75) were investigated for the conversion of cassava starch to HMF. The structure of the catalysts was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, Pyridine Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The acid strength and acid capacity were also investigated. The effects of reaction time, temperature, catalyst concentration, and cassava starch concentration on the selectivity, conversion rate, and yield were examined. The results showed that, among the analyzed catalysts, Sn0.1PW presented the best ability under the test conditions for catalyzing the conversion of starch to HMF. At the optimized conditions of a reaction temperature of 160°C, a catalyst dosage of 0.50 mmol/gstarch, and a 1 h reaction time, the starch conversion rate was 90.61%, and the selectivity and yield of HMF were 59.77 and 54.12%, respectively. Our findings contribute to the development of HMF production by the dehydration of carbohydrates.
研究领域:
化学工程
·
可再生资源转化
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产品关联
DOI
高影响因子
Micro & Nano Letters
·
2013
·Vol. 8
·期 1
·23-26
·
IF 0.845
Wei Wang,Yong Li,Hui Wang
The electrocatalytic performance of commercial PtRu/C is significantly enhanced by directly mixing a few SnO 2 nanoparticles. The composite catalysts show enhanced CO oxidation, higher activity and better stability than commercial PtRu/C. Among the different ratios of SnO 2 nanoparticles (10–40%), the SnO 2 –PtRu/C (20%) composite catalyst shows the best catalytic activity for methanol oxidation. The effect of temperature on methanol oxidation was also investigated and the apparent activation energy ( E a ) value of catalyst was obtained. The results here suggest a simple route to enhance the catalytic efficiency for commercial PtRu/C catalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SPECTROSCOPY
·
2018
·
IF 1.642
Mei Liu,Ying Shi,Guangping Zhang,Yongheng Zhang,Meimei Wu,Junfeng Ren,Baoyuan Man
Surface-enhanced Raman spectroscopy (SERS) is a powerful spectroscopy technique to detect and characterize molecules at a very low concentration level. The two-dimensional (2D) semi-conductor layered material, tin diselenide (SnSe2), is used as a new substrate for enhancing the Raman signals of adsorbed molecules. Three kinds of molecules—Rhodamine 6G (R6G), crystal violet (CV), and methylene blue (MB)—are used as probe molecules to evaluate the SERS performance of SnSe2. The Raman signals of different molecules can be enhanced by SnSe2 nanoplates (NPs). The distinguishable Raman signal of R6G molecules can be obtained for adsorbent concentrations as low as 10−17 mol/L. Based on a detailed analysis of the bandgap structure and opto-electrical properties of SnSe2 NPs, we discuss the process of charge transfer and the Raman enhancement mechanism of SnSe2 NP. The high Raman sensitivity of SnSe2 NPs is related to the charge transfer between molecules and SnSe2, 2D layered structure, and indirect bandgap of few-layered SnSe2. The research results will help to expand the application of SnSe2 in microanalysis, improve the measurement accuracy of SERS, and possibly find use in optoelectronic device integration.
研究领域:
材料科学
·
光学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 15
·9316-9320
·
IF 3.108
Li-Long Jiang,Xiangzhou Zeng,Mengkai Li,Man-Qing Wang,Tong-Yu Su,Xiao-Chun Tian,Jing Tang
We synthesized a HKUST-1 metal–organic framework (MOF) on indium tin oxide (ITO) using an electrodeposited Cu film. The electrodeposited Cu/ITO was used as a source of Cu ions, which were linked with benzene-1,3,5-tricarboxylic acid on the ITO surface to form HKUST-1. Synthesized HKUST-1/ITO was characterized by X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM), which showed that the morphology of the HKUST-1 framework was nearly octahedral. Our results also revealed that the growth of HKUST-1 depended on the potential and synthesis time used. This method can be applied to fabricate ordered patterns of HKUST-1 on ITO substrates, offering a new way to grow MOFs on many other kinds of conductive substrates.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
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