JOURNAL OF ALLOYS AND COMPOUNDS
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2018
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IF 3.779
Junting Wang,Jun Li,Kai Wang,Jie Gong,Yuan Li,Gaoke Zhang
Although the preparation of Aurivillius-type oxyfluoride compounds as photocatalysts has been reported, the control synthesis of Bi 2 NbO 5 F with the exposed highly active facets is still challenging. Herein, the pure Bi 2 NbO 5 F plates have been successfully synthesized through a novel molten salt strategy. Compared to Bi 2 NbO 5 F prepared by solid state method (BF S), the Bi 2 NbO 5 F obtained by molten salt method revealed better crystallinity and purity. Transmission electron microscope (TEM) and corresponding selected area electron diffraction (SAED) confirm that the main exposed facet of Bi 2 NbO 5 F plates is {010} facet. Density functional theory (DFT) calculations indicated Bi 2 NbO 5 F crystal belongs to direct-gap semiconductor and its {010} facet was the most active facet due to its highest surface energy. The Bi 2 NbO 5 F sample with exposed highly active {010} facet exhibited promoted photocatalytic activity for degradation of tetracyclines (TC) and rhodamine B (RhB) in water as compared to the BF S. The free radical capture experiments prove that O 2 − , OH and h + are the main active radicals. The Bi 2 NbO 5 F plates with exposed {010} facet still had high photocatalytic activity even after four cycles. Finally, the possible mechanism of Bi 2 NbO 5 F nanoplate for photocatalytic degradation of pollutants was proposed.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Ziwei Deng,Qi Wang,Dachun Peng,Hongbo Liu,Yuxi Chen
Olivine-type LiFe x Mn 1- x PO 4 /C cathode materials are of great interest for lithium-ion batteries because of their higher lithium ion intercalation potential compared with that of LiFePO 4 . Two types of LiFe 0.5 Mn 0.5 PO 4 /C nanorods with different sizes and crystal structures were synthesized through a facile glycol-based solvothermal process with different precursor feeding sequences. The microstructural investigation revealed that the size and structure of the LiFe 0.5 Mn 0.5 PO 4 nanorods can be tuned by nucleation and crystal growth rates of the intermediate precipitates, which can be controlled by precursor feeding sequence. The LiFe 0.5 Mn 0.5 PO 4 nanorods obtained through the first feeding sequence (a solution of transition metal salts was added dropwise into the solution mixture of LiOH and H 3 PO 4 ) exhibited less exposure of the (010) crystal faces and had bigger sizes compared with those of the LiFe 0.5 Mn 0.5 PO 4 nanorods obtained through the second feeding sequence (a LiOH solution was added dropwise into the solution mixture of H 3 PO 4 and transition metal salts). Electrochemical investigations indicated that the LiFe 0.5 Mn 0.5 PO 4 nanorods obtained through the second feeding sequence showed substantially improved electrochemical performance, in which the discharge capacities reached 157 and 119 mAh g −1 at 0.2 and 5 C, respectively. Furthermore, a capacity retention of 89% was obtained after 500 cycles at 1 C, demonstrating excellent cyclic stability.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
Advanced Sustainable Systems
·
2025
·
IF 6.1
Wei Lin,Yulu Wu,Xinyu Hu,Peng Yang,Hong Wen,Tianfu Zhao,Lianbang Wang,Chaoqi Shen
A well-designed solvothermal approach has been employed to synthesize olivine LiMn 0.5 Fe 0.5 PO 4 (LMFP) cathode material with a nanoplate configuration. This method precisely controls crystal growth to achieve a high proportion of (010) facets while minimizing intrinsic defects. These modifications significantly enhance lithium-ion diffusion kinetics and optimize the electrochemical performance of LMFP. The nanoscale of the (010) facets and the reduced anti-site defect concentration in the MP-PRO sample functionalize jointly to promote lithium-ion transport during the long-cycle. Furthermore, the superior electrochemical performance is closely linked with significantly reduced impedance and enhanced Mn redox kinetics. Both theoretical calculations and experimental results indicate that the confinement effect induced by 1,3-propanediol directs facet orientation and confines nanoplate growth. Compared to the product synthesized using water (MP-H 2 O), the 1,3-propanediol-based sample (MP-PRO) delivers a high specific capacity of 130.7 mAh g −1 at 5C and demonstrates excellent cycling stability, with an 84.6% capacity retention after 1000 cycles. This study provides new insights into the kinetics of Mn redox in LMFP electrodes and reveals an effective electrode structure design to realize long-life high rate batteries.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2017
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IF 4.364
Puhong Wen,Lili Ai,Taotao Liu,Dengwei Hu,Fangyi Yao
The regular orthorhombic Nb 2 O 5 (O-Nb 2 O 5 ) rectangle nanosheets dominantly exposed (010) facet are synthesized by a hydrothermal topological reaction with a precursor of K 4 Nb 6 O 17 ·4.5H 2 O (KNbO). The structure and morphology of the samples obtained at different temperatures and pH values of reacting solution are investigated. The results suggest that there are two topological reactions in this process. One is the acid-exchanging reaction transforming into H 4 Nb 6 O 17 ·3H 2 O (HNbO) nanosheets from KNbO rectangle nanosheets , and the other is dehydration reaction transforming into O-Nb 2 O 5 rectangle nanosheets from HNbO nanosheets. And the {010} facets of O-Nb 2 O 5 crystal are transformed from the {010} facets of HNbO crystal in the ingenious topological reaction. The photoelectric performance of the obtained O-Nb 2 O 5 nanosheets is evaluated by decomposing water to H 2 under 370 nm UV light illumination and measuring the accompanying photocurrent . The photocurrent density is 680 nA·cm − 2 generated by splitting water with O-Nb 2 O 5 nanosheets as photocatalyst , and it is 4.3 times of the contrast sample. The result indicates that the (010) facet of O-Nb 2 O 5 is one of the highest photocatalytic active surfaces and shows high photoelectric conversion efficiency. Thus, the O-Nb 2 O 5 nanosheets dominantly exposed (010) facet have potential applications in photocatalyst and photoelectric nanodevices .
研究领域:
材料科学
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光催化
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纳米材料
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无机化学
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能源材料
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DOI
高影响因子
Nanomaterials
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2025
·Vol. 15
·期 13
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IF 4.3
Shenghua Yuan,Chengwen Ren,Ziwei Liu,Yu Chen,Wenhui Wang
Lithium-rich layered oxide (LLO) has received extensive attention from researchers due to its high initial discharge capacity (≥250 mAh g−1). However, defects such as its high initial irreversible capacity, voltage decay, and poor rate performance have severely limited its commercialization. These issues arise because the Li2MnO3component in LLO is activated during the initial cycle, leading to the participation of lattice oxygen anions (O2−) in redox reactions. This results in irreversible oxygen loss (O2) and subsequent structural phase transitions. To address these challenges, this study focuses on Li1.2Ni0.13Co0.13Mn0.54O2as the host material, utilizing abundant exposed (010) plane secondary particles and employing a vanadium (V) doping strategy to enhance electrochemical performance. The V forms strong V-O bonds with the lattice oxygen, effectively suppressing irreversible oxygen loss and improving structural stability. The results demonstrate that the LLO achieves the best electrochemical performance as the doping amount is 1 mol%, and the capacity retention improves from 74.5% (undoped) to 86% (V-doped) after 140 cycles at 0.5 C.
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2025
·
IF 4.7
Xiangge Wang,Xiaoxiao Lu,Wen-Jie Chen,Chunmei Xiao,Miaoling Huang,Xiaoyang Pan,Bo Weng,Shijing Liang
In recent years, piezo-catalytic hydrogen production has been widely investigated for potential applications. Despite various strategies having been utilized to enhance the performance of piezocatalysts, there is a scant report on improving catalytic activity through the modulation of carrier migration pathways. Herein, we have successfully synthesized BiOCl with exposed {001} and {010} facets through facet engineering. The built-in electric field within the BiOCl crystals is oriented perpendicular to the {001} facets and parallel to the {010} facets, leading to differing charge carrier transfer pathways in the two samples. Specifically, in the BiOCl-010 sample, due to the electric field parallel to the nanosheet plane, charge carriers migrate along the x-axis. In contrast, in the BiOCl-001 sample, the electric field is perpendicular to the nanosheet plane, causing charge carriers to transfer along the z-axis, resulting in a shorter charge carrier migration distance. Consequently, BiOCl-001 demonstrates superior piezo-catalytic performance compared to BiOCl-010 toward H2 production and dye degradation. Both samples exhibit identical morphologies and similar energy band structures. Therefore, the enhanced performance is attributed to its shorter charge transport distance as well as the relatively higher piezoelectric coefficient associated with the {001} facets of BiOCl, which facilitates effective carrier separation.
研究领域:
材料科学
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催化
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纳米技术
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环境科学
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能量转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）