JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 23
·19614-19619
·
IF 2.324
Hu Yiwei,Chen Xinhang,Ren Xiaohui,Huang Zongyu,Qi Xiang,Zhong Jianxin
Tin disulfide (SnS 2 ) has been attracted intensive attention in the field of photoelectric conversion due to its appropriate band gap and glorious electronic mobility. The hexagon SnS 2 nanosheets has been successfully integrated through a facile one-pot hydrothermal method. SEM images, Raman spectra, atomic force microscope and X-ray diffraction patterns are measured to carry out to investigate the morphologies and microstructures of SnS 2 nanosheetsm, confirming a good crystallized SnS 2 . Then, the photochemical activity of as-prepared SnS 2 nanosheets were tested in the electrolyte of Na 2 SO 4 . Photoelectrochemical tests demonstrate that the photocurrent density of as-prepared hexagon SnS 2 nanosheets (1.66 µA/cm 2 at a light intensity of 140 mW/cm 2 ) is hugely increased with increasing light intensity. Furthermore, after 50 cycles, the photocurrent density does not change significantly, indicating that the as-prepared SnS 2 nanosheets possesses superior stabilities. The outstanding photocatalytic performances of SnS 2 nanosheets are not only resulted from its huge specific surface area, which can harvest more light and provide more active sites, but also attributed to its superior charge mobility, which can facilitate the separation photogenerated electron–hole pairs and the charge transfer between SnS 2 nanosheets and the electrode. The most important is that our work reveals the hexagonal SnS 2 nanosheets not only possess superior photoelectrochemical properties, but also have great potential applications in energy conversion and photodetector fields.
研究领域:
材料科学
·
光催化
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能源转换
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纳米材料
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光电化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 12
·期 5
·4610-4618
·
IF 1.5
Chenle Zhang,Libo Deng,Peixin Zhang,Xiangzhong Ren,Yongliang Li,Tingshu He
Electrocatalytic NiS 2 cubes were directly synthesized on F-doped tin oxide using a hydrothermal approach and used as counter electrode in dye-sensitized solar cells (DSSCs). The NiS 2 cubes displayed an excellent electrocatalytic activity in the reduction of I 3 − showing a power conversion efficiency of 5.56%, which is close to that of the Pt-containing DSSC (7.05%). Furthermore, the NiS 2 cubes showed a comparable stability to Pt. This is ascribed to the low resistance to diffusion and transfer of electrolyte ions. These results suggest that the NiS 2 cubes prepared through a facile process is a promising substitute to Pt electrode.
研究领域:
材料科学
·
能源化学
·
纳米材料
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电化学
·
光伏器件
✓ 已验证
DOI
高影响因子
MATERIALS LETTERS
·
2014
·
IF 2.269
Jianxiu Liu,Dafeng Zhang,Xipeng Pu,Daoyou Dong,Peiqing Cai,Hyo Jin Seo
Magnetically separable Zn 1− x Cd x S/γ-Fe 2 O 3 ( x =0–1) photocatalysts were synthesized by a one-step combustion method. The structures, morphologies, absorbance, optical and photocatalytic properties of the samples were studied by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy , ultraviolet–visible spectrophotometry and photoluminescence . The experimental results show that the formation of hexagonal Zn 1− x Cd x S and γ-Fe 2 O 3 and the combination of them were one-pot achieved. The Cd 2+ content has a significant influence on the absorbance of visible light and fluorescence properties. The magnetic properties of samples ensure the magnetic separation by using a magnet. CdS/γ-Fe 2 O 3 shows the best photocatalytic performance compared with other samples, ascribed to its small energy band gap and matching energy band structure between CdS and γ-Fe 2 O 3 . Moreover, no obvious deterioration was observed in the stability tests.
研究领域:
材料化学
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光催化
·
纳米材料
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环境功能材料
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无机合成
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 24
·11370-11376
·
IF 9.931
Qinglong Fu,Pan Yang,Jingchuan Wang,Hefang Wang,Lijun Yang,Xiaochong Zhao
Simple, safe and economic methods to prepare Ni nanofibers are required for their practical application. Herein, an in situ vacuum thermal reduction strategy is proposed to synthesize Ni nanofibers on a large scale, which involves electrospinning of a nickel acetate/polyvinylpolypyrrolidone/ethyl cellulose (NiAc/PVP/EC) precursor solution, followed by vacuum thermal treatment. Characterization of the morphology and microstructure reveals that the as-prepared Ni nanofibers are composed of nano-size Ni grains and possess a large surface area. Moreover, it has been demonstrated that the content of EC is closely related to the size of Ni grains and thus the surface area of Ni nanofibers. On account of their high specific surface area, the as-prepared Ni nanofibers exhibit efficient catalytic properties for H2 generation from hydrous hydrazine in an alkaline solution.
研究领域:
材料科学
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纳米技术
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催化化学
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能源材料
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物理化学
✓ 已验证
DOI
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2021
·
IF 7.328
Yunfeng Wu,Yu Zang,Liang Xu,Jianjun Wang,Hongge Jia,Fengjuan Miao
High-performance conjugated microporous polymer (CMP)/TiO 2 photocatalytic antibacterial nanocomposites were successfully synthesized by in situ Sonogashira polymerization. TiO 2 was uniformly dispersed onto the surface and within the CMP which show the microporous nature with narrow pore size distribution. The high crystallinity and thermal stability of the CMP/TiO 2 nanocomposites are attractive for use as antibacterial materials. The composites we prepared showed excellent photocatalytic antibacterial properties for the inactivation of Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) under visible light irradiation. The photocatalytic antibacterial rates of nanocomposites against E. coli and S. aureus after 120 min of visible light irradiation were 98.14% and 100%, respectively. The superoxide anion ( O 2 − ) was confirmed to be an important substance in the antibacterial process above. The cytocompatibility of the antibacterial agents was studied in terms of cytotoxicity against NIH 3T3 fibroblasts. More than 95% of the cells were still alive in the presence of the nanocomposites, both without and with light irradiation, indicating the good cytocompatibility of the nanocomposites. Judging from the excellent photocatalytic antibacterial properties and ultralow toxicity of nanocomposites, these materials can be used in many fields such as medical treatment, transportation and construction.
研究领域:
材料科学
·
纳米医学
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生物材料
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光催化
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抗菌治疗
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Jishu Han,Fangxu Dai,Ying Liu,Ruiyang Zhao,Lei Wang,Shouhua Feng
The photocatalytic hydrogen production has become one of the most promising strategies to solve the energy crisis and environmental pollution. Novel CdSe/SrTiO 3 nanocomposites (average diameter ≈ 114.6 nm) with high photocatalytic activity are synthesized and used for visible light photocatalytic water splitting for hydrogen production . Through optimizing the concentration of CdSe QDs, CdSe/SrTiO 3 nanocomposites exhibit increased visible light absorption and enhanced photocatalytic hydrogen evolution efficiency compared to SrTiO 3 nanoparticles. The maximum H 2 evolution amount reaches to 3350.53 μmol in 8 h by using CdSe/SrTiO 3 -3 as catalyst. Owing to the formation of heterojunction at the interface between CdSe and SrTiO 3 , the electrochemical impedance spectrum of CdSe/SrTiO 3 -3 exhibits the smallest arc radius and the photocurrent density of CdSe/SrTiO 3 -3 reaches to 0.26 μA cm −2 . The photogenerated electrons are effectively separated and transferred and the recombination of electron-hole pairs is avoided, thus significantly improving the photocatalytic hydrogen production performance of CdSe/SrTiO 3 nanocomposites.
研究领域:
材料科学
·
物理化学
·
纳米催化
·
能源材料
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光催化
✓ 已验证
DOI
高影响因子
JOURNAL OF HETEROCYCLIC CHEMISTRY
·
2022
·Vol. 59
·期 9
·1561-1572
·
IF 2.035
Ling Jiang,Si-Yu Yan,Jing-Wen Dong,Li-Dan Ye,Yue Cheng,Xiao-He Chu
A series of polysubstituted pyrroles were rapidly synthesized in moderate to good yields via catalyst-free one-pot three-component reaction of 1,3-dicarbonyl compounds with primary amines and nitrostyrenes by using liquid-assisted grinding. This protocol provides several advantages over the conventional chemical synthesis, such as simple work-up procedure, wide substrate scope, short reaction time, and environmental friendliness. Structures of polysubstituted pyrroles were confirmed by 1 H NMR, 13 C NMR, and ESI-MS studies.
研究领域:
有机化学
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药物化学
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绿色化学
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合成方法学
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杂环化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Lvlv Ji,Lei Zhu,Jianying Wang,Zuofeng Chen
A self-supported copper sulfide (CuS) nanowire array (NWA) of hierarchical and porous structure has been developed on Cu foil via two consecutive liquid-solid reactions at room temperature. The composition, structure and morphology of the as-prepared CuS NWA samples have been systematically investigated by a series of techniques. When applied as cathode for the hydrogen evolution reaction (HER) in neutral solution, the optimized CuS NWA electrode exhibits excellent HER performance with high long-term stability. To achieve current densities of 10 and 100 mA cm −2 , it requires overpotentials of only ∼97 and ∼226 mV, respectively. The excellent catalytic performance of CuS NWA toward HER is attributable to the binder-free electrode construction strategy, the unique porous nanowire array structure, and the small solubility product ( K sp ) value of CuS that guarantees the high catalyst stability.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源化学
·
催化化学
✓ 已验证
DOI
高影响因子
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2020
·
IF 3.442
Deqiang Feng,Jie He,Lingcheng Zheng,Wenjun Jiang,Ce Zhang,Long Li,Jian Song,Wei Yao
Developing novel catalysts and catalysis processes are highly attractive in environmental protection and energy utilization. Photocatalysis-Fenton combinational process is an environmentally friendly technology and has broad application prospects. In this work, thin Fe@α-Fe 2 O 3 nanosheets with thickness of 2–5 nm were designed by oxidation of Fe metal nanostructure synthesized using a modified solution reaction method. The nanosheet structure with thin thickness has short diffusion distance for the photogenerated carriers and prolongs the carriers' life. Simultaneously, the presence of Fe can reduce the resistance of system and further promote the transport and transfer of photogenerated carriers from the bulk to the surface, causing less carrier recombination and better photocatalytic performance. What's more, the Fe@α-Fe 2 O 3 composite can induce the Fenton-like reaction to generate active • OH radicals, which significantly improve the degradation rate . The synergistic effect of photocatalysis and Fenton processes makes the system show an enhanced photodegradation performance: 96.5% of RhB is degraded after 60 min visible light irradiation , especially, 84.3% of RhB is degraded within the first 10 min, which are much higher than that of the pure α-Fe 2 O 3 sample. This work demonstrates that the conjunction of photocatalysis and Fenton processes based on the Fe@α-Fe 2 O 3 nanosheets provides a potential application for pollutants degradation.
研究领域:
环境化学
·
材料科学
·
催化化学
·
纳米科技
·
物理化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 50
·39878-39883
·
IF 3.84
Cheng Feng,Yunhui Hao,Li Zhang,Ningzhao Shang,Shutao Gao,Zhi Wang,Chun Wang
Formic acid (FA) has tremendous potential as a safe and convenient source of hydrogen for renewable energy storage, but controlled and efficient dehydrogenation of FA by a robust solid catalyst constitutes a major challenge. In this report, a metal nanoparticle functionalized zeolitic imidazolate framework (ZIF) derived N-decorated nanoporous carbon (NPC) support was fabricated and used as an efficient FA decomposition catalyst for the first time. The resultant AgPd@NPC catalyst exhibited 100% H2 selectivity and high catalytic activity (TOF = 936 h−1) toward the dehydrogenation of formic acid at 353 K. The synergetic interaction between the metal nanoparticles and NPC greatly enhances the catalytic performance of the as-prepared catalyst.
研究领域:
催化化学
·
能源材料
·
纳米材料
·
物理化学
·
氢能存储
✓ 已验证
DOI
高影响因子
MACROMOLECULAR CHEMISTRY AND PHYSICS
·
2016
·Vol. 217
·期 24
·2726-2735
·
IF 2.495
Huiliang Sun,Shuren Zhang,Yike Yang,Xiao Li,Hongmei Zhan,Yanxiang Cheng
Six aryl Pd(II) bromide complexes based on perylene diimide derivative (Ar) and phosphine mixed-ligands are successfully synthesized by directly oxidative addition of Ar–Br to the Pd(0) precursor. These complexes with the general formulas ArPdBr(PCy 3 ) 2 (PCy 3 = tricyclohexylphosphine; Pd1–Pd3 ) and [ArPdBr(TXP-2,4)] 2 (TXP-2,4 = tri-2,4-xylylphosphine; Pd4–Pd6 ) are stable and can be handled in air at room temperature. By employing the Pd(II) complexes as initiators, Suzuki catalyst transfer polymerization (SCTP) of AB-type fluorene monomer is investigated for preparing polyfluorenes (PFs) with the defined end group. Complexes Pd4–Pd6 with auxiliary TXP-2,4 ligand can initiate polymerization of AB-type fluorene monomer at room temperature, while higher polymerization temperature is required for Pd1–Pd3 with alkyl phosphine PCy 3 . The obtained polymers are analyzed by matrix-assisted laser desorption ionization-time-of-flight mass spectrometry, which confirms that the Ar group is appended to the terminus of the polymer chain. Moreover, PFs prepared by Pd4–Pd6 -catalyzed SCTP bear precisely the Ar group on one chain end and 4- tert -butylphenyl end-capping group on the opposite end, which indicates that Pd4–Pd6 with the bulky TXP-2,4 exhibit better catalytic performance in SCTP. Photoluminescence spectra of the obtained polymers show a dual or a blue emission resulting from the difference of the molecular weight.
研究领域:
高分子化学
·
有机合成
·
功能材料
·
聚合反应机理
·
光电子材料
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2015
·Vol. 41
·期 3
·1550-1558
·
IF 3.313
Meilin Lv,Shuang Ni,Zhuo Wang,Tongcheng Cao,Xiaoxiang Xu
Doping has generally been served as one of the most efficient strategies for the improvement of wide band gap semiconductor photocatalysts . However, atomic arrangements of doped elements in the host crystal structure have often been overlooked, particularly during the investigation and evaluation of dopant functionality. It is known that electronic structures of a semiconductor are profoundly controlled by atomic occupancies in different crystallographic positions. Knowledge about dopant accommodations in the crystal structure and their influence towards photocatalytic performance is highly desired. Here, we investigated four compositional and structural relevant compounds CrNbO 4 , CrTaO 4 , Sr 2 CrNbO 6 and Sr 2 CrTaO 6 with the aim to study the effects of cation ordering/disordering upon their photocatalytic activity . Our results showed that ordered cations, namely Cr and Nb/Ta, are detrimental to the photocatalytic performance. Theoretical calculations indicate that cation ordering would enlarge the band gap and inhibit charge transfer between Cr and Nb/Ta. Our findings imply that ordered dopants in photocatalytic materials would severely offset the benefits of doping and might be a reason for the decreased activity at high doping levels often encountered.
研究领域:
材料科学
·
半导体物理
·
光催化
·
固体化学
·
能源材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）