Nanoscale
·
2021
·Vol. 13
·期 10
·5489-5496
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IF 7.79
Zhiwei Wang,Xiang Wang,Qian Chen,Xiaoshan Wang,Xiao Huang,Wei Huang
The spatial arrangement of heterostructures based on two-dimensional layered materials is important in controlling their electronic and optoelectronic properties. In this contribution, by controlling the reaction kinetics and thus the nucleation and growth sequence of p-type SnS and metallic NbS2, controllable preparation of both SnS@NbS2 core@shell and SnS/NbS2 lateral heterostructures was realized. The SnS@NbS2 core@shell heterostructures were further applied in photodetectors, and interestingly, a negative photoresponse was observed due to the Seebeck effect exerted on the NbS2 shell. Compared with the pure metallic NbS2, the SnS@NbS2 core@shell heterostructures showed a 15 times increased signal-to-noise ratio and much improved photocurrent stability, largely due to the charge and heat transfer between the SnS core and NbS2 shell.
研究领域:
材料科学
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光电材料
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产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 6
·1531
·
IF 5.076
Haoxian Chen,Jiayi Wang,Yan Zhao,Qindan Zeng,Guofu Zhou,Mingliang Jin
The severe shuttle effect of soluble polysulfides hinders the development of lithium–sulfur batteries. Herein, we develop a three-dimensionally ordered macro/mesoporous (3DOM) Nb2O5/Nb4N5heterostructure, which combines the strong adsorption of Nb2O5and remarkable catalysis effect of Nb4N5by the promotion “adsorption-transformation” mechanism in sulfur reaction. Furthermore, the high electrocatalytic activity of Nb4N5facilitates ion/mass transfer during the charge/discharge process. As a result, cells with the S-Nb2O5/Nb4N5electrode delivered outstanding cycling stability and higher discharge capacity than its counterparts. Our work demonstrates a new routine for the multifunctional sulfur host design, which offers great potential for commercial high-performance lithium–sulfur batteries.Keywords:Nb2O5;Nb4N5;heterostructure;lithium-sulfur batteries
研究领域:
材料科学
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能源存储
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产品关联
DOI
PubMed
高影响因子
AIP Advances
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2024
·Vol. 14
·期 3
·
IF 1.4
Wang Xingtian,Zhu Junfeng,Liu Wenbing,Li Wei,Wang Hu
High levels of groundwater containing both arsenic and fluorine are prevalent, resulting in serious health problems when consumed as drinking water. This co-pollution phenomenon is widespread and requires urgent attention. The multiple forms of arsenic and arsenic–fluorine co-contamination pose a significant challenge to efficiently co-remove both substances. This research utilized a green and stable synthesis approach to create MgLaFe layered double oxide (LDO) heterostructures, which were anchored on α-MnO 2 nanowires. The materials comprise magnesium and lanthanum elements with a powerful attraction toward fluoride ions; elemental iron, which can establish stable compounds with arsenate; and MnO 2 , which can effectively oxidize arsenous acid, thereby enabling efficient co-removal of arsenic and fluorine. The efficient oxidation process of the MnO 2 nanowire and the prompt ion adsorption process of the LDO work together synergistically. The adsorption performance was assessed through isotherms and kinetic fitting. Chemisorption was found to be the process for As(Ⅲ), As(V), and F − adsorption, with As(Ⅲ) going through monolayer adsorption on the surface of MnO 2 nanowires, while As(V) and F − were mainly adsorbed by multilayer process on LDO. The maximum adsorption capacities were 111.76, 230.51, and 765.10 mg/g for As(Ⅲ), As(V), and F − , respectively. The x-ray photo-electronic spectroscopy analysis provided further elucidation on the adsorption mechanism of the MnO 2 @LDO heterostructure, detailing each component's role in the process. The results confirm the successful construction of the heterostructure and the efficient coupling of oxidation and adsorption.
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
JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
Qian Chen,Xiao Wang,Wanyan Liu,Tao Luo,Zhen Jin,Yong Zhang,Jian Huang,Hua Zhang,Jinhua Wang,Fumin Peng
Currently, Cr(VI) poses a great threat to the human health and ecosystem due to its acute toxicity and potential carcinogenicity. In order to quickly and efficiently reduce Cr(VI) to Cr(III) by photocatalysis , a new In 2 S 3 -ZnIn 2 S 4 heterostructure hierarchical microtubes, which is based on the combination of the main three strategies for the enhancement of photocatalysts’ performance including semiconductor heterostructure, hierarchical microstructure, and hollow morphology, were designed and successfully synthesized via a facile liquid chemical treatment of metal-organic frameworks pre-synthesized as a self-sacrificing template. The microstructure, composition and photocatalytic properties of In 2 S 3 -ZnIn 2 S 4 composite were investigated by means of SEM, TEM, XRD , XPS, PL and electrochemical techniques . The photocatalytic reduction performance of In 2 S 3 -ZnIn 2 S 4 composites are much better than that of pure In 2 S 3 and ZnIn 2 S 4 under visible light irradiation . For the best photocatalytic activity of the as-prepared sample, the Cr(VI) with the initial concentration of 80 mg/L in the water can be photocatalytic reduced 93.4% in 10 min under visible light irradiation, which meet the requirement of design well.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Dongxu Zhu,Guyu Liu,Guangjiang Zhang,Zihao Yin,Huan Yang,Shuai Gao,Chenhe Zhang,Xinguo Xi
Spinel-type transition metal oxide (AB 2 O 4 ) are promising non-precious metal catalysts for oxygen evolution reaction (OER), addressing the challenges of high cost and poor stability in electrocatalytic water splitting. However, their widespread application is hindered by low electrical conductivity and suboptimal performance. In this study, we developed an oxygen vacancy anchoring strategy to construct a highly efficient and durable NiCo 2 O 4 -NiSe 2 heterojunction catalyst on a nickel foam substrate. The three-dimensional cross-linked porous nanorod array facilitates mass and charge transportation. The abundant interconnected interfaces enhance electron transfer kinetics and adsorption of OH intermediates, as confirmed by theoretical simulations. As a result, the as-synthesized NiCo 2 O 4 @NiSe 2 /NF exhibits an overpotential of only 299 mV at a current density of 60 mA cm −2 , significantly outperforming the single-phase NiCo 2 O 4 and demonstrating exceptional durability.
研究领域:
材料科学
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电催化
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能源转换
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DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Shumail Farhan,Asif Hassan Raza,Long Li,Songyu Yang,Yan Wu
Comprehending the catalytic reaction implementation for heterostructure photocatalysts is crucial by scrutinizing the spatial separation and transfer process of photoexcited charges at nanoscale junctions. Herein, we fabricated the F-doped TiO 2 /ZnIn 2 S 4 -based S-scheme heterostructure using a direct liquid-assembly method. The optimum hydrogen evolution rate (HER) of ∼ 1.58 mmol g –1 h –1 was acquired for 30-F 3 T@ZIS, which was about 15 and 2 times superior to the pristine F-doped TiO 2 and ZnIn 2 S 4 , respectively. The interaction between F-doped TiO 2 and ZnIn 2 S 4 facilitated the charge transfer from ZIS to F 3 T which was confirmed through XPS. UV–vis spectroscopy and Mott–Schottky validated that F-doped TiO 2 and ZnIn 2 S 4 retain the suitable energy band alignment for the S-scheme heterostructure. In situ, KPFM and EPR analysis revealed that F-doped TiO 2 and ZnIn 2 S 4 possess a spontaneous photoelectrochemical response, and their junction significantly improves the internal electric field by separating photoexcited charge carriers. This work provides a conclusive experimental and theoretical validation for an internal electric field and charge flow direction in non-noble-metal-based heterostructure photocatalysts.
研究领域:
材料科学
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催化化学
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DOI
PubMed
高影响因子
CRYSTENGCOMM
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2025
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IF 2.6
Bolin Ma,Guanghui Chen,Lingling Zhou,Chengyang Ni,Xinyu Sun,Lei Zhang,Xinguo Xi,Lanqin Tang,Yong Zhou
The development of highly efficient photocatalysts for CO2 reduction remains a critical challenge in achieving sustainable energy conversion. In this study, we report the synthesis of a UiO66-NH2@In2O3, integrating UiO66-NH2 metal organic frameworks (MOFs) with indium oxide (In2O3) nanoparticles, forming a robust heterostructure. Characterization results demonstrated that calcination at 250 °C for 4 hours yielded a heterostructure with indium uniformly incorporated, as confirmed by XRD, SEM, TEM and ICP-OES analyses. XPS studies revealed significant electronic interactions between UiO66-NH2 and In2O3, including shifts in binding energies of indium and zirconium, indicative of chemical bonding. This heterostructure facilitated enhanced charge separation and transfer, as evidenced by photocurrent measurements, leading to superior photocatalytic CO2 reduction performance. Under light irradiation, UiO66-NH2@In2O3 achieved a CO production rate of 83.68 μmol g−1 during the first hour and a cumulative yield of 485.08 μmol g−1 after 7 hours, significantly outperforming pristine UiO66-NH2 and In2O3. The superior activity is attributed to the large surface area of UiO66-NH2, facilitating CO2 adsorption, and the heterojunction formation with In2O3, enhancing charge carrier dynamics. These findings highlight the synergistic effects of UiO66-NH2 and In2O3, providing insights into the design of advanced photocatalysts for environmental and energy applications.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Chuan Gang,Jiayi Chen,Qihao Chen,Yantao Chen
The supported and dispersed ultrafine active species for electrocatalytic water oxidation are quite promising for the high intrinsic activity. A novel heterostructure of ultrafine FeOOH nanodots with an average size of 2.3 nm supported on CoAl-LDH nanosheets , is constructed by a facile method under ambient conditions. The as-prepared FeOOH@CoAl-LDH shows a strong interfacial interaction upon the formation of heterostructure, and is demonstrated as a highly efficient and stable electrocatalyst that demands 272 mV to attain 50 mA cm −2 and exhibits a Tafel slope of 40 mV dec −1 . Moreover, density functional theory calculations manifest the coupling of FeOOH with CoAl-LDH can effectively decrease the energy barrier during the water oxidation process by optimizing the adsorption free energy of intermediates in the reaction pathway. The successful development of FeOOH@CoAl-LDH can shed light on the design of novel electrocatalysts that can fully take advantages of small size, heterostructure and synergistic effect.
研究领域:
材料科学
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电化学
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理论计算
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DOI
PubMed
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2020
·Vol. 26
·期 17
·3870-3876
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IF 4.857
Xiaoshan Wang,Yao Liu,Jie Dai,Qian Chen,Xiao Huang,Wei Huang
Graphical By taking advantage of the crystal phase dependent electronic property of SnSe x based materials, SnSe( x %)/SnSe 2 (100− x %) p–n heterostructures were synthesized via a facile one-step colloidal method, and the SnSe(50 %)/SnSe 2 (50 %) based sensor exhibited much improved sensing performance due to the formation of p–n hetero-junctions. The formation of semiconductor heterostructures is an effective approach to achieve high performance in electrical gas sensing. However, such heterostructures are usually prepared via multi-step procedures. In this contribution, by taking advantage of the crystal phase-dependent electronic property of SnSe x based materials, we report a one-step colloid method for the preparation of SnSe( x %)/SnSe 2 (100− x %) p–n heterostructures, with x ≈30, 50, and 70. The obtained materials with solution processability were successfully fabricated into NO 2 sensors. Among them, the SnSe(50 %)/SnSe 2 (50 %) based sensor with an active layer thickness of 2 μm exhibited the highest sensitivity to NO 2 (30 % at 0.1 ppm) with a limit of detection (LOD) down to 69 ppb at room temperature (25 °C). This was mainly attributed to the formation of p–n junctions that allowed for gas-induced modification of the junction barriers. Under 405 nm laser illumination, the sensor performance was further enhanced, exhibiting a 3.5 times increased response toward 0.1 ppm NO 2 , along with a recovery time of 4.6 min.
研究领域:
材料科学
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化学传感器
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纳米技术
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DOI
高影响因子
Nanomaterials
·
2018
·Vol. 8
·期 10
·835
·
IF 3.504
Jiaqi Chen,Shaolong Huang,Yaojia Long,Jiahao Wu,Hui Li,Zhao Li,Yu-Jia Zeng,Shuangchen Ruan
Photocatalysis is a green technique that can convert solar energy to chemical energy, especially in H2production from water splitting. In this study, ZnO and red phosphorus (ZnO/RP) heterostructures were fabricated through a facile calcination method for the first time, which showed the considerable photocatalytic activity of H2evolution. The photocatalytic activities of heterostructures with different ratios of RP have been investigated in detail. Compared to bare ZnO, ZnO/RP heterostructures exhibit a 20.8-fold enhancement for H2production and furthermore overcome the photocorrosion issue of ZnO. The improved photocatalytic activities highly depend on the synergistic effect of the high migration efficiency of photo-induced electron–hole pairs with the inhibited charge carrier recombination on the surface. The presented strategy can also be applied to other semiconductors for various optoelectronics applications.Keywords:photocatalysis;H2evolution;red P;ZnO;heterostructure
研究领域:
材料科学
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能源科学
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DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
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2024
·
IF 5.1
Haochun Chen,Yin Wang,Shuxing Zhou,Nianpeng Li,Xijun Liu,Abdukader Abdukayum,Lei Zhang,Guangzhi Hu
The development of water-separation-performing, noble-metal-free, and cost-effective electrocatalysts is of the utmost importance. This work outlines the preparation of ordered, macroporous MoS 2 –Fe 2 Mo 3 O 8 /MoO 2 electrocatalysts with heterogeneous structures using pyrolysis and sulfidation methods. The resulting macroporous and heterogeneous structures feature more active sites and facilitate ion diffusion, thereby effectively improving the overall performance. The catalyst demonstrated excellent performance in both the oxygen evolution reaction (OER) and the hydrogen evolution reaction (HER) in a 1 M potassium hydroxide solution, requiring overpotentials of 213 and 60 mV, respectively, to achieve a current density of 10 mA cm −2 . Moreover, the MoS 2 –Fe 2 Mo 3 O 8 /MoO 2 -based electrolyzer only requires an output voltage of 1.49 V, exhibiting superior performance and long-term stability compared to commercial catalysts. This study introduces a novel approach for achieving a heterogeneous macroporous structure that can enhance electrocatalysis .
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
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Chao Yue Zhang,Zhong Wei Lu,Yu Hai Wang,Zhe Dai,Hao Zhao,Geng Zhi Sun,Wei Lan,Xiao Jun Pan,Jin Yuan Zhou,Er Qing Xie
Many heterostructures containing two types of strong polar bonds were often designed to synergistically increase the chemical confining for soluble lithium polysulfide in lithium-sulfur batteries (LSBs). To make maximum use of the two chemical interactions on confining the polysulfides, a novel structure of 2D hexagonal WS 2 -rimmed Co 9 S 8 heterostructure nanoflakes was designed on the surface of carbon nanofiber (CNF) skeletons via a simple technique. The composite nanoflakes are ~50 nm in diameter and ~5 nm in thickness, and comprised of a ~40-nm Co 9 S 8 core and a 3–4 WS 2 edge. In this design, the Co 9 S 8 core and WS 2 edge can confine the polysulfides and catalyze the electrochemical progresses at the same time. Electrochemical tests indicated that the CNF@WS 2 @Co 9 S 8 -S cathodes show a high capacity (1175 mAh g −1 at 0.1 C), an excellent rate capability (keep 77.85% at 2.0 C), and a superior cycling stability (a low decay rate of 0.061% per cycle at 2.0 C, even lower at 7.0 C and 12.0 C).
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）