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Noble-metal free plasmonic nanomaterials for enhanced photocatalytic applications—A review

Nano Research 2022年第12期15卷 10268-10291页

作者： Jinghua Li Yiming Zhang Yalong Huang Bing Luo Li Jing Dengwei Jing International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an710049China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an710049China

Plasmonic nanomaterial catalysis is currently at the frontier of photocatalysis,overcoming the limitations of wide bandgap semiconductors for light *** localized surface plasmon resonance(LSPR)properties allow broad ultraviolet-visible-near infrared ray(UV-vis-NIR)absorption,making it an ideal material for solar energy *** plasmonic nanostructures rely on precious *** noble metal plasmonic nanomaterials have proven to be one of the strategies for enhancing photocatalytic activity,their expensive cost and limitations in light absorption range have hindered their practical *** a result,noble-metal free plasmonic nanomaterials have risen to the top of the research priority ***,this paper reviews the fundamental principles and classification of the LSPR effect of noble-metal free plasmonic nanomaterials in photocatalytic and their recent applications in hydrogen generation,carbon dioxide reduction,and pollutant *** cases elucidate the possible working mechanism of enhanced photocatalysis by noble-metal free plasmonic ***,the challenges and future opportunities for noble-metal free plasmonic nanomaterials in energy conversion and storage are discussed and envisioned.

关键词： localized surface plasmon resonance(LSPR) noble-metal free plasmonic nanomaterials photocatalysis

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Numerical study of EGR effects on reducing the pressure rise rate of HCCI engine combustion

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中国高等学校学术文摘·能源与动力工程 2010年第3期4卷 376-385页

作者： Gen CHEN Norimasa IIDA Zuohua HUANG State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China Graduate School of Science and Technology Keio University Japan Graduate School of Science and Technology Keio University Japan State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China

The effects of the inert components of exhaust gas recirculation (EGR) gas on reducing the pressure rise rate of homogeneous charge compression ignition engine combustion were investigated numerically by utilizing the CHEMKIN II package and its SENKIN code, as well as Curran's dimethyl ether reaction scheme. Calculations were conducted under constant volume combustion and engine combustion (one compression and one expansion only, respectively) conditions. Results show that with constant fuel amount and initial temperature and pressure, as EGR ratio increases, combustion timings are retarded and the duration of thermal ignition preparation extends non-linearly; peak values of pressure, pressure rising rate (PRR), and temperature decrease; and peak values of heat release rate in both low temperature heat release (LTHR) and high temperature heat release decrease. Moreover, maximum PRR decreases as CA50 is retarded. With constant fuel amount, mixtures with different EGR ratios can obtain the same CA50 by adjusting the initial temperature. Under the same CA50, as EGR ratio increases, the LTHR timing is advanced and the duration of thermal ignition preparation is extended. Maximum PRR is almost constant with the fixed CA50 despite the change in EGR ratio, indicating that the influence of EGR dilution on chemical reaction rate is offset by other factors. Further investigation on the mechanism of this phenomenon is needed.

关键词： HCCI engine combustion EGR DME CA50 PRR

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Technological innovations on direct carbon mitigation by ordered energy conversion and full resource utilization

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Carbon Neutrality 2022年第1期1卷 598-619页

作者： Liejin Guo Zhisong Ou Ya Liu Zhiwei Ge Hui Jin Guobiao Ou Mengmeng Song Zihao Jiao Wenhao Jing State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityNo.28Xianning West RoadXi’an 710049People’s Republic of China

Coal consumption leads to over 15 billion tons of global CO_(2) emissions annually,which will continue at a considerable intensity in the foreseeable *** remove the huge amount of CO_(2),a practically feasible way of direct carbon mitigation,instead of capturing that from dilute tail gases,should be developed;as intended,we developed two innovative supporting technologies,of which the status,strengths,applications,and perspective are discussed in this *** is supercritical water gasification-based coal/biomass utilization technology,which orderly converts chemical energy of coal and low-grade heat into hydrogen energy,and can achieve poly-generation of steam,heat,hydrogen,power,pure CO_(2),and *** other one is the renewables-powered CO_(2) reduction techniques,which uses CO_(2) as the resource for carbon-based fuel *** combining the above two technical loops,one can achieve a full resource utilization and zero CO_(2) emission,making it a practically feasible way for China and global countries to achieve carbon neutrality while creating substantial domestic benefits of economic growth,competitiveness,well-beings,and new industries.

关键词： Carbon neutrality Coal utilization Direct carbon mitigation Supercritical water gasification Renewable energy CO_(2)reduction

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Gold/oxide heterostructured nanoparticles for enhanced SERS sensitivity and reproducibility

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Rare Metals 2020年第7期39卷 834-840页

作者： Qi-Kui Fan Ting-Zhuo Liu Hou-Shen Li Shu-Meng Zhang Kai Liu Chuan-Bo Gao Frontier Institute of Science and Technology and State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710054China College of Chemistry and Material Science Shandong Agricultural UniversityTaian 271018China

In surface-enhanced Raman scattering(SERS),it is highly desirable to obtain Raman signals with high sensitivity and reproducibility from noble metal nanoparticle substrates,which remains a great challenge due to the inhomogeneity of the plasmonic coupling that is sensitive to the interparticle *** this work,we report that the interparticle plasmonic coupling could be circumvented by first synthesizing Au/metal or nonmetal oxide heterostructured nanoparticles and then depositing them uniformly onto the substrates,leading to high reproducibility of the Raman *** plasmonic coupling has been found at the Au/oxide interface,which enables high sensitivity of the SERS analysis that accompanies the excellent signal *** different oxides investigated(SiO2,TiO2 and Fe2O3),the Au/Fe2O3 heterostructured nanoparticles demonstrate the highest Raman enhancement *** believe our strategy opens a promising route to fabricate SERS substrates that are capable of sensitively and quantitatively detecting molecules of interest in a much reliable manner.

关键词： Gold nanoparticles Au/oxide heterostructures Hot spots Surface-enhanced Raman scattering Reproducibility

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An Experimental Study Of Gas-Liquid Slug flow In Vertical And Inclined Tubes Using High Speed Motion Analyzer

An Experimental Study Of Gas-Liquid Slug Flow In Vertical An...

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ASME 1996 International Mechanical engineering Congress and Exposition, IMECE 1996

作者： Xia, Guodong Zhou, Fangde Hu, Mingsheng State Key Laboratory of Multiphase Flow In Power Engineering Xi’an Jiaotong University Xi’an710049 China

ISBN: (纸本)9780791815212

Experimental investigation was carried out for gas-liquid slug flow in vertical and inclined tubes. The non- Invasive measurements of the gas-liquid slug flow were taken by using the EKTAPRO 1000 High Speed Motion Analyzer. The present paper has obtained the information on the velocity of the Taylor bubble, the size distribution of the dispersed bubbles in the liquid slugs and some characteritics of the liquid film around the Taylor bubble. The experimental results are in good agreement with the available data. © 1996 American Society of Mechanical Engineers (ASME). All rights reserved.

关键词： Liquid films

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Experimental and modeling study on auto-ignition of DME/ n -butane blends under engine relevant pressure

Experimental and modeling study on auto-ignition of DME/ n -...

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SAE 2014 World Congress and Exhibition

作者： Jiang, Xue Zhang, Yingjia Pan, Lun Man, Xingjia Huang, Zuohua State Key Laboratory of Multiphase Flow in Power Engineering Xi'An Jiaotong University Xi'an 710049 China

In this study, the ignition delay times of DME/n-C4H 10 fuel blends (neat DME, 50/50 and neat n-C4H 10) diluted with argon were measured behind reflected shock waves. The experiments were performed in the temperature range of 1250 - 1600 K, at pressure of 2.0 MPa and equivalence ratios from 0.5 to 2.0. A latest kinetic mechanism NUIG Aramco Mech 1.3 was validated against the present ignition data and used to conducted chemical kinetic analysis. Different equivalence-ratio- dependent was exhibited at different temperature regimes for DME, n-C 4H10, and their blend. Fuel flux analysis, sensitive analysis and mole fraction analysis were carried out for understanding the interaction between the ignition chemistries of DME and n-C4H 10. Copyright © 2014 SAE International.

关键词： Shock waves

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Modulating redox transition kinetics by anion regulation in Ni-Fe-X(X=O,S,Se,N,and P)electrocatalyst for efficient water oxidation

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Nano Research 2024年第6期17卷 4720-4728页

作者： Liting Wei Kaini Zhang Rui Zhao Lei Zhang Yan Zhang Suyi Yang Jinzhan Su International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China Department of Applied Chemistry Yuncheng UniversityYuncheng 044000China

NiFe-based electrocatalysts will experience dynamical surface reconstruction during oxygen evolution reaction(OER)process,and the derived metal(oxy)hydroxide hybrids on the surface have been considered as the actual active species for *** efforts have been dedicated to understanding the surface reconstruction,but there is rare research on recognizing the origin of improved performance derived from anion species of ***,the OER electrocatalytic characteristics were tuned with different anions in NiFe-based catalyst,using NiFe-based oxides/nitride/sulfide/selenides/phosphides(NiFeX,X=O,N,S,Se,and P)as the model *** combination of X-ray photoelectronic spectroscopy,electrochemical tests,operando spectroscopic characterizations,and density functional theory(DFT)calculations,reveals that anion with lower electronegativity in NiFe-based catalyst leads to higher conductivity and delayed valence transition of Ni sites,as well as optimized adsorption behavior towards oxygen intermediates,contributing to enhanced OER ***,NiFeP electrocatalyst demonstrates an ultralow overpotential of 265 mV at 20 mA·cm−2 for OER,as well as long-term *** work not only offers further insights into the effect of anionic electronegativity on the intrinsic OER electrocatalytic properties of NiFe-based electrocatalyst but also provides guide to design efficient non-noble metal-based electrocatalysts for water oxidation.

关键词： oxygen evolution reaction(OER) anion species electronegativity valence transition

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Boosting photocatalytic hydrogen production via interfacial engineering over a Z-scheme core/shell heterojunction

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Nano Research 2023年第1期16卷 352-359页

作者： Bing Luo Jinghua Li Wei Wang Chaoqian Ai Haihan Zhang Yuxin Zhao Dengwei Jing School of Chemical Engineering and Technology Xi'an Jiaotong UniversityXi'an 710049China International Research Center for Renewable Energy&State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong UniversityXi’an 710049China

Designing high efficacy photocatalysts is a promising way to improve solar fuel production *** this work,we prepared a core/shell composite of loose ZnCr layered double hydroxide nanosheets modified CdS nanorods for efficient visible light driven photocatalytic hydrogen *** highest hydrogen production rate achieved 425.8μmol·h^(−1) without adding any noble metal cocatalyst under the visible light stimulus,which is 22.4 times that of 1 wt.%Pt-modified *** corresponding apparent quantum yield is 13.9%at 420 *** is revealed that the synergistic actions of the interfacial redox shuttle of Cr^(3+)/Cr^(δ+)and the interfacial electric field enable the efficient separation of photoinduced charge carriers between two components via a Z-scheme energy band ***,with the hydrogen evolution contribution of Zn^(2+),a remarkable improvement in photocatalytic performance was achieved in contrast to bare *** work provides an effective methodology to construct highly efficient and economically viable photocatalysts for solar H_(2)production and mechanistic study.

关键词： photocatalysis heterojunction interfacial engineering noble metal free hydrogen production

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Experimental investigation of gasoline spray vaporization behaviors under various ambient conditions 12

Experimental investigation of gasoline spray vaporization be...

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12th Asia-Pacific Conference on Combustion, ASPACC 2019

作者： Zhan, Cheng Yang, Rui Tong, Shangqing Huang, Zuohua State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

In terms of spray vaporization visualization, effects of ambient temperature (394-516 K) and ambient pressure (0.1-3.8 MPa) on multi-hole gasoline spray macroscopic characteristics has been investigated separately via optical diagnostics. Schlieren method was adopted to visualize vapor phase fuel at high ambient temperature. Laser sheet optical patternation provided us with cross-section perspective to verify results in schlieren images and acquire additional information like plume distribution. The results show that vaporization process will be promoted by high ambient temperature due to enhanced heat transfer between spray body and surrounding gas. The effects of ambient pressure on spray evolution possess different inner mechanisms with ambient temperature variation. In low ambient temperature, axial evolution indicated by vapor tip penetration will be restricted by high ambient pressure, whereas radial expansion indicated by spray angle will be facilitated. For atmospheric ambient pressure in high ambient temperature, spray collapse will appear due to enhanced vaporization of single plume and intensified jet-to-jet interaction. Moreover, because of inhibited vaporization of light component in high ambient pressure, vaporization model will transfer from distilled-like vaporization to co-vaporization, indicated by homogeneous vapor phase distribution. © Asia-Pacific Conference on Combustion, ASPACC *** right reserved.

关键词： Vaporization

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Estimation of likely accident progression at Fukushima Daiichi unit 2

Estimation of likely accident progression at Fukushima Daiic...

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2017 Transactions of the American Nuclear Society, ANS 2017

作者： Li, Gen Zhang, Jun Yan, Junjie State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

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