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学者姓名：桑丽霞
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摘要 ：
Metal-organic frameworks (MOFs) as emerging material have drawn much attention to apply to the field of water splitting. In this paper, layered NiFe-MIL-53 and nanoflower-like CoFe-MOF-74 were sequentially grown on nickel foam through two-step in -situ growth to construct a MOF-74/MIL-53 heterojunction. On this basis, we used the localized surface plasmon resonance (LSPR) effect of gold nanoparticles (Au NPs) to significantly improve the oxygen evolution reaction performance of MOF-74/MIL-53 heterojunction. Under illumation, the obtained Au-MOF-74/MIL-53 exhibits a lower overpotential of 218 mV, which is far superior to commercial catalyst. The reaction kinetics are significantly enhanced due to the lower charge transfer resistance and the higher electric double layer capacitance. We confirmed the existence of charge transfer between Au NPs and MOFs, and at the same time, the deposition of Au NPs significantly reduced the charge transfer resistance of MOF-74/MIL-53. On the basis of our work, we provide a novel MOF-based electrocatalytic nanocomposite structure for efficient water splitting.
关键词 ：
Water electrolysis Water electrolysis MOF MOF Plasmonic Au Plasmonic Au Heterojunction Heterojunction Oxygen evolution reaction Oxygen evolution reaction
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| GB/T 7714 | Liu, Xiaohang , Sang, Lixia , Zhou, Tingyi . High-efficient water splitting over an in-situ growth novel electrocatalyst of metal-organic framework-based nanostructures [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 69 : 441-450 . |
| MLA | Liu, Xiaohang 等. "High-efficient water splitting over an in-situ growth novel electrocatalyst of metal-organic framework-based nanostructures" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 69 (2024) : 441-450 . |
| APA | Liu, Xiaohang , Sang, Lixia , Zhou, Tingyi . High-efficient water splitting over an in-situ growth novel electrocatalyst of metal-organic framework-based nanostructures . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2024 , 69 , 441-450 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Exploring the plasmon energy dissipation mechanism of bimetallic nanostructures after photoexcitation is of great significance for controlling energy transfer in plasmonic applications. The absorption, scattering, and extinction spectra of Ag@Cu, Ag@Pt, and Ag@Co core-shell nanostructures are calculated by finite element method, and the energy dissipation process is visualized by using particle trajectory and the absorbed power density distribution. The absorption/scattering ratio of the core-shell nanostructures, the shell absorptivity, the time-domain electric field as well as the extra-core electron arrangements of Ag, Cu, Pt, and Co atoms are analyzed for figuring out the energy dissipation mechanism. The results show that when a non-plasmonic metal is coated on the surface of a plasmonic metal, the plasmon energy dissipates preferentially in the shell, and the degree of dissipation depends on the imaginary part of the dielectric constant of the shell and the core. A larger dielectric constant of the shell can cause more energy to be transferred from the plasmonic metal to the shell region. This study provides the fundamental physical framework and design principles for plasmonic nanostructures.
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| GB/T 7714 | Sang, Lixia , Ren, Zhiyong , Zhao, Yue . Localized surface plasmon energy dissipation in bimetallic core-shell nanostructures [J]. | JOURNAL OF CHEMICAL PHYSICS , 2024 , 161 (3) . |
| MLA | Sang, Lixia 等. "Localized surface plasmon energy dissipation in bimetallic core-shell nanostructures" . | JOURNAL OF CHEMICAL PHYSICS 161 . 3 (2024) . |
| APA | Sang, Lixia , Ren, Zhiyong , Zhao, Yue . Localized surface plasmon energy dissipation in bimetallic core-shell nanostructures . | JOURNAL OF CHEMICAL PHYSICS , 2024 , 161 (3) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
There has been an increasing interest in using thermoplasmonics effect of metallic nanoparticles to increase the rate of chemical reactions. However, it remains a challenge to separate out the role of thermoplasmonics effect from the localized surface plasmon resonance (LSPR). In this work, Au@SiO2/TiO2 with different SiO2 shell thicknesses (2, 3, 4, and 5 nm) are prepared as plasmonic composite photoanodes for photoelectrochemical (PEC) water splitting. Their electric and temperature field distributions are calculated by coupling the wave optics and the heat transfer modules in the COMSOL software. The decoupling of the LSPR relaxation mechanism of hot electron injection and thermoplasmonics effect is achieved by adjusting the SiO2 shell thickness. When the SiO2 thickness reaches 4 nm, the transmission process of the hot electrons produced by Au nanoparticles to TiO2 is completely hindered, and the thermoplasmonics effect is retained. By comparing the activities of Au@SiO2-4/ TiO2 with Au/TiO2, the relative contribution of thermoplasmonics effect can be estimated to be 36 % in PEC water splitting.
关键词 ：
SiO2 shell SiO2 shell PEC PEC Thermoplasmonics effect Thermoplasmonics effect Decoupling Decoupling Hot electron injection Hot electron injection
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| GB/T 7714 | Zhao, Yue , Sang, Lixia , Ren, Zhiyong . Decoupling the role of thermoplasmonics effect and hot electron injection of metallic nanoparticles in photoelectrochemical system [J]. | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2024 , 267 . |
| MLA | Zhao, Yue 等. "Decoupling the role of thermoplasmonics effect and hot electron injection of metallic nanoparticles in photoelectrochemical system" . | SOLAR ENERGY MATERIALS AND SOLAR CELLS 267 (2024) . |
| APA | Zhao, Yue , Sang, Lixia , Ren, Zhiyong . Decoupling the role of thermoplasmonics effect and hot electron injection of metallic nanoparticles in photoelectrochemical system . | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2024 , 267 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
It is of great interest to enhance the photoelectrochemical hydrogen production rate of TiO2 by utilizing the new Metal-organic frameworks material such as NH2-MIL-125(Ti), but the assembly method and its details often bring about a significant difference in performances of the composite photoelectrode. In this study, NH2-MIL-125 is grown on the surface of TiO2 nanorods by an in-situ strategy, and then Cu-modified NH2-MIL-125/TiO2 photoanode is prepared by impregnation method. Based on the characterization of SEM, UV-VIS DRS and PL spectra, the disc-like NH2-MIL-125 can improve the light absorptance in visible light region, and the modification of Cu}/Cu2} can inhibit the charge recombination in NH2-MIL-125/TiO2 photoanode, resulting in the improved the carrier transport ability verified by EIS and IMPS. Under AM 1.5 illumination, H2 evolution rate over Cu-NH2-MIL125/TiO2 is boosted a great extent, which is 4.6 times than that of pristine TiO2. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
关键词 ：
TiO 2 nanorods TiO 2 nanorods Photoelectrode Photoelectrode Cu-NH 2-MIL-125 Cu-NH 2-MIL-125 Hydrogen production Hydrogen production
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| GB/T 7714 | Sang, Lixia , Liu, Xiaohang , Wang, Xudong et al. Enhanced photoelectrochemical hydrogen production by a composite photoanode constructed with TiO2 nanorods and Cu-modified NH2-MIL-125 [J]. | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (39) : 14697-14706 . |
| MLA | Sang, Lixia et al. "Enhanced photoelectrochemical hydrogen production by a composite photoanode constructed with TiO2 nanorods and Cu-modified NH2-MIL-125" . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 48 . 39 (2023) : 14697-14706 . |
| APA | Sang, Lixia , Liu, Xiaohang , Wang, Xudong , Lei, Lei , Cao, Angran . Enhanced photoelectrochemical hydrogen production by a composite photoanode constructed with TiO2 nanorods and Cu-modified NH2-MIL-125 . | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY , 2023 , 48 (39) , 14697-14706 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Mixed nitrates with relative low melting point have widely been used as thermal storage medium in the concentrated solar power stations. However, their maximum working temperatures aren't high enough to integrate with more efficient power generation systems such as the supercritical CO2 cycle. In the present work, mixed nitrates with elevated working temperature were obtained by adding KCl/K2CO3. With the help of FactSage software and back-propagation (BP) algorithm combined with genetic algorithm (GA), the eutectic compositions and melting points of NaNO3-KNO3-KCl and NaNO3-KNO3-K2CO3 were predicted, and the validity of BP algorithm combined with GA was verified. Based on DSC and TG curves, the melting points of the as-prepared NaNO3-KNO3-KCl and NaNO3-KNO3-K2CO3 are 206.12 degrees C and 207.24 degrees C, respectively, which are in agreement with predicted values. Moreover, their decomposition temperatures were increased to more than 640 degrees C. In addition, the specific heat capacity of both mixed molten salts was measured, and it also was calculated by using FactSage software. This work provides two new ternary molten salts based on nitrates with higher working temperature and develops the prediction method on phase diagram calculation and machine learning.
关键词 ：
Molten salt Molten salt Machine learning Machine learning Working temperature Working temperature Phase diagram calculation Phase diagram calculation Concentrated solar power Concentrated solar power
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| GB/T 7714 | Sang, Lixia , Lv, Xiaoyuan , Wu, Yuting . NaNO3-KNO3-KCl/K2CO3 with the elevated working temperature for CSP application: Phase diagram calculation and machine learning [J]. | SOLAR ENERGY , 2023 , 252 : 322-329 . |
| MLA | Sang, Lixia et al. "NaNO3-KNO3-KCl/K2CO3 with the elevated working temperature for CSP application: Phase diagram calculation and machine learning" . | SOLAR ENERGY 252 (2023) : 322-329 . |
| APA | Sang, Lixia , Lv, Xiaoyuan , Wu, Yuting . NaNO3-KNO3-KCl/K2CO3 with the elevated working temperature for CSP application: Phase diagram calculation and machine learning . | SOLAR ENERGY , 2023 , 252 , 322-329 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
The thermoplasmonics effect has achieved increasing attention because it can be utilized as an efficient and highly localized heat source at the nanoscale, but there have been few studies to well clarify and quantify it in the process of plasmonic solar water splitting. In this work, Au-rGO/TiO2 photoelectrode is fabricated by loading Au nanoparticles (NPs) and rGO onto TiO2 nanoring-nanotube arrays via electrodeposition and cyclic voltammetry, respectively. COMSOL Multiphysics is used to simulate and calculate the temperature field of Au nanoparticles, and the obtained data is selected and imported into the artificial neural network model to further predict the temperature of 800-1000 Au NPs arrays under AM 1.5 light intensity. The predicted results are consistent with the temperature rises of the reaction system measured by an infrared thermal imaging camera. The temperature at which Au-rGO/TiO2 reaches a steady state has been verified to be 314.55 K, which can greatly accelerate the thermoplasmonics effect based on Au NPs and the positive effect of rGO on the heat transfer process from Au to TiO2. This work innovatively combines multiphysics simulation with machine learning, providing an approach to quantify the thermoplasmonics effect of photoelectrode in solar-hydrogen conversion.
关键词 ：
Thermoplasmonics effect Thermoplasmonics effect Au NPs Au NPs Machine learning Machine learning Solar-hydrogen conversion Solar-hydrogen conversion rGO rGO
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| GB/T 7714 | Zhao, Yue , Sang, Lixia , Wang, Chong . Thermoplasmonics effect of Au-rGO/TiO2 photoelectrode in solar-hydrogen conversion [J]. | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2023 , 255 . |
| MLA | Zhao, Yue et al. "Thermoplasmonics effect of Au-rGO/TiO2 photoelectrode in solar-hydrogen conversion" . | SOLAR ENERGY MATERIALS AND SOLAR CELLS 255 (2023) . |
| APA | Zhao, Yue , Sang, Lixia , Wang, Chong . Thermoplasmonics effect of Au-rGO/TiO2 photoelectrode in solar-hydrogen conversion . | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2023 , 255 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
A supercritical CO2 (sCO(2)) Brayton cycle solar power system based on solid particle thermal energy storage is proposed to enhance the efficiency of concentrated solar power (CSP). The effective thermal conductivity and thermal cycling stability of solid particles are crucial for sCO(2) CSP applications. Some natural and artificial solid particles, such as black silicon carbide, green silicon carbide, white corundum, brown corundum, brown ceramsite sand, garnet, river sand and desert sand are considered as potential thermal energy storage medium due to its low cost and easy availability in large quantities. However, there are few studies about the effective thermal conductivity and stability of these solid particles after thermal cycling tests. In this study, the effective thermal conductivity of these solid particles was measured by the hot wire method. Particularly, the effective thermal conductivity of black silicon carbide and green silicon carbide was measured by modified hot wire method. In addition, the changes of mass, real density, bulk density, void fraction and mean diameter of the above-mentioned solid particles after 100 times thermal cycling tests were also recorded to analyze thermal cycling stability. Based on the results of all the above tests, green silicon carbide exhibits high effective thermal conductivity and good thermal cycling stability, which presents a great potential as a thermal energy storage medium.
关键词 ：
Effective thermal conductivity Effective thermal conductivity sCO(2) concentrated solar power sCO(2) concentrated solar power Solid particles Solid particles Thermal cycling tests Thermal cycling tests The hot wire method The hot wire method
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| GB/T 7714 | Sang, Lixia , Wang, Kaiyin , Zhang, Ran et al. Effective thermal conductivity and thermal cycling stability of solid particles for sCO(2) CSP applications [J]. | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2022 , 242 . |
| MLA | Sang, Lixia et al. "Effective thermal conductivity and thermal cycling stability of solid particles for sCO(2) CSP applications" . | SOLAR ENERGY MATERIALS AND SOLAR CELLS 242 (2022) . |
| APA | Sang, Lixia , Wang, Kaiyin , Zhang, Ran , Wang, Yuancong , Wu, Yuting . Effective thermal conductivity and thermal cycling stability of solid particles for sCO(2) CSP applications . | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2022 , 242 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Direct particle receiver of the concentrated solar power (CSP) with a supercritical CO2 (sCO2) Brayton cycle is based on the solid particles to achieve high efficiency at high temperature. Among all kinds of solid particles, desert sand is abundant and cheap, however its solar weighted absorptance and thermal stability remain to be improved. In this work, the dark desert sands were obtained by in-situ coating transition metal oxides via sol-gel combustion process. The thermal stability of the resultant samples was analyzed according to the changes in composition, morphology and optical properties before and after thermal treatment at 800 degrees C for 200 h. Based on the characterization of UV-Vis-NIR diffuse reflectance spectroscopy, the solar weighted absorptance of each sample was calculated. Compared with the original particles, all of dark desert sands have the improved solar weighted absorptance, and the highest value of 0.8635 belongs to desert sand coated with spinel CuMn2O4. Moreover, compared to the original desert sand, each dark desert sand has superior thermal stability. In addition, the specific heat of particles was measured at different temperatures, and it is found that the coating has lesser effects on the specific heat of desert sand. The solar weighted absorptance of dark desert sand nearly unchanged after attrition and the coating remained well maintained on the surface of the sample. This work provides a practical and feasible way to enhance the solar weighted absorptance and thermal stability of desert sand, making it possible to apply in sCO2 CSP.
关键词 ：
Transition metal oxides Transition metal oxides Solar weighted absorptance Solar weighted absorptance Desert sand Desert sand Thermal stability Thermal stability CSP CSP
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| GB/T 7714 | Sang, Lixia , Wang, Kaiyin , Wu, Yuting et al. The improved solar weighted absorptance and thermal stability of desert sand coated with transition metal oxides for direct particle receiver [J]. | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2022 , 251 . |
| MLA | Sang, Lixia et al. "The improved solar weighted absorptance and thermal stability of desert sand coated with transition metal oxides for direct particle receiver" . | SOLAR ENERGY MATERIALS AND SOLAR CELLS 251 (2022) . |
| APA | Sang, Lixia , Wang, Kaiyin , Wu, Yuting , Ma, Chongfang . The improved solar weighted absorptance and thermal stability of desert sand coated with transition metal oxides for direct particle receiver . | SOLAR ENERGY MATERIALS AND SOLAR CELLS , 2022 , 251 . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
In this paper, plasmonic Ag and Cu nanoparticles were co-deposited on TiO2 nanoring/nanotube arrays (TiO2 R/T) by using two-step pulse electrodeposition method for investigating the optical and photoelectrochemical properties, in comparison to monometallic Ag, Cu decoration. By optimizing the electrodeposition cycle times and electrolyte concentration, bimetallic Ag-Cu/TiO2 R/T-0.5 with moderate densities and sizes of Ag and Cu nanoparticles was fabricated and shows great photocatalytic potential, in which, Ag mainly facilitates the generation of hot electrons by absorbing visible light and Cu plays an important role in accelerating the separation and transportation of hot electrons. The hydrogen production rate was tested as 425 mu L h(-1) cm(-2), which is about 1.34-fold enhanced H2 production over TiO2 R/T. Furthermore, molecular dynamics simulations were made for analyzing the interface electrostatic properties between plasmonic nanoparticles of Ag or Cu and the semiconductor TiO2. It is calculated that bimetallic Ag-Cu/TiO2/H2O system has larger interfacial Helmholtz potential than monometallic Ag/TiO2/H2O, Cu/TiO2/H2O and pure TiO2/H2O systems, accelerating the four-electron reaction occurring at the semiconductor/electrolyte interface. This research put forward a feasible and simple pulse electrodeposition method to fabricate bimetallic photoanodes for enhanced hydrogen evolution and an important analysis method of semiconductor/ metal/electrolyte interface characteristics. (C) 2022 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan.
关键词 ：
Interface electrostatic properties Interface electrostatic properties Photoelectrochemical water splitting Photoelectrochemical water splitting Deposition density Deposition density Bimetallic Ag-Cu nanoparticles Bimetallic Ag-Cu nanoparticles Pulse electrodeposition method Pulse electrodeposition method
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| GB/T 7714 | Lei, Lei , Sang, Lixia , Gao, Yunlong . Pulse electrodeposition of Ag, Cu nanoparticles on TiO2 nanoring/nanotube arrays for enhanced photoelectrochemical water splitting [J]. | ADVANCED POWDER TECHNOLOGY , 2022 , 33 (3) . |
| MLA | Lei, Lei et al. "Pulse electrodeposition of Ag, Cu nanoparticles on TiO2 nanoring/nanotube arrays for enhanced photoelectrochemical water splitting" . | ADVANCED POWDER TECHNOLOGY 33 . 3 (2022) . |
| APA | Lei, Lei , Sang, Lixia , Gao, Yunlong . Pulse electrodeposition of Ag, Cu nanoparticles on TiO2 nanoring/nanotube arrays for enhanced photoelectrochemical water splitting . | ADVANCED POWDER TECHNOLOGY , 2022 , 33 (3) . |
| 导入链接 | NoteExpress RIS BibTex |
摘要 ：
Bimetallic nanostructures have been endowed with the function of enhancing photon absorption and charge separation for photo-hydrogen conversion. Bimetallic CuAg/TiO2 nanotube arrays (TNTAs) were synthesized with the different ratios of precursors Cu2+ and Ag+ (1 : 3, 1 : 1, and 3 : 1) and their local electric field distribution was characterized by means of COMSOL software. The results demonstrate that the increase of the amount of Cu particles has an active effect on the inhibition of the hot spot effect between Ag particles. In addition, the current flow between Ag and Cu verified the "double take" of Cu particles. They receive hot electrons transferred from Ag, and also provide injected hot electrons for TiO2. Based on X-ray photoelectron spectroscopy, the binding energy shifts in a CuAg bimetal with different metal ratios, indicating the electron transfer behavior from Ag to Cu. When an optimal proportion of the CuAg bimetal is 3 : 1, the photocurrent density and average hydrogen evolution rate of CuAg/TNTAs were 1.78 and 1.69 times higher, respectively, than those of pure TNTAs, implying far more efficient migration of hot electrons.
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| GB/T 7714 | Yu, Zexin , Gao, Yunlong , Sang, Lixia et al. Probing into the double identity of Cu in bimetallic CuAg-TNTA hot-electron devices for photo-hydrogen conversion [J]. | CATALYSIS SCIENCE & TECHNOLOGY , 2021 , 11 (19) : 6529-6536 . |
| MLA | Yu, Zexin et al. "Probing into the double identity of Cu in bimetallic CuAg-TNTA hot-electron devices for photo-hydrogen conversion" . | CATALYSIS SCIENCE & TECHNOLOGY 11 . 19 (2021) : 6529-6536 . |
| APA | Yu, Zexin , Gao, Yunlong , Sang, Lixia , Lei, Lei . Probing into the double identity of Cu in bimetallic CuAg-TNTA hot-electron devices for photo-hydrogen conversion . | CATALYSIS SCIENCE & TECHNOLOGY , 2021 , 11 (19) , 6529-6536 . |
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