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Triazine-COF@silicon nanowire mimicking plant leaf to enhance photoelectrocatalytic CO_(2)reduction to C2þchemicals

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Green Energy & Environment 2025年第2期10卷 422-432页

作者： Wenrui Wan Fanhua Meng Si Chen Jianhua Wang Chunyan Liu Yan Wei Chenpu He Li Fan Qiaolan Zhang Weichun Ye Huanwang Jing State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou730000GansuChina Key Laboratory of Green Chemical Media and Reactions(Ministry of Education) School of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang453007HenanChina School of Chemical Engineering Lanzhou University of Arts and SciencesLanzhou730010China

Converting CO_(2)and water into valuable chemicals like plant do is considered a promising approach to address both environmental and energy *** inspiration from the structures of natural leaves,we designed and synthesized a novel copper-coordinated covalent triazine framework(CuCTF)supported by silicon nanowire arrays on wafer *** marks the first-ever application of such a hybrid material in the photoelectrocatalytic reduction of CO_(2)under mild *** Si@CuCTF6 heterojunction has exhibited exceptional selectivity of 95.6%towards multicarbon products(C^(2+))and apparent quantum efficiency(AQE)of 0.89%for carbon-based *** active sites of the catalysts are derived from the nitrogen atoms of unique triazine ring structure in the ordered porous framework and the abundant Cu-N coordination sites with bipyridine ***,through DFT calculations and operando FTIR spectra analysis,we proposed a comprehensive mechanism for the photoelectrocatalytic CO_(2)reduction,confirming the existence of key intermediate species such as*CO_(2)-,*=C=O,*CHO and*CO-CHO *** work not only provides a new way to mimic photosynthesis of plant leaves but also gives a new opportunity to enter this research field in the future.

关键词： silicon Photoelectrocatalysis CO_(2)reduction Covalent triazine framework Sustainable chemistry

silicon prepared by electro-reduction in molten salts as new energy materials

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Journal of Energy Chemistry 2020年第8期29卷 46-61,I0002页

作者： Tingting Jiang Xinyi Xu George Z.Chen The State Key Laboratory of Refractories and Metallurgy College of Materials and MetallurgyWuhan University of Science and TechnologyWuhan 430081HubeiChina Electrochemical Technologies Group Faculty of EngineeringUniversity of NottinghamNottingham NG27RDUK Electrochemical Technologies Group Faculty of Science and EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100ZhejiangChina

silicon has a large impact on the energy supply and economy in the modern world. In industry, high purity silicon is firstly prepared by carbothermic reduction of silica with the produced raw silicon being further refined by a modified Siemens method. This process suffers from the disadvantages of high cost and contaminant release and emission. As an alternative, the molten salt electrolysis approach, particularly the FFC Cambridge Process(FFC: Fray-Farthing-Chen), could realize high purity silicon products with morphology-controllable nanostructures at low or mild temperatures(generally 650–900 ℃). In this article, we review the development, reaction mechanisms, and electrolysis conditions of silicon production by the FFC Cambridge Process. Applications of the silicon products from electrolysis in molten salts are also discussed in terms of energy applications, including using them as the photovoltaic element in solar cells and as the charge storage phase in the negative electrode(negatrode) of lithium ion batteries.

关键词： Electrolysis Molten salt silicon Nanomaterial Li ion battery Solar cell

silicon-based optoelectronic synaptic devices

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Chinese Physics B 2020年第7期29卷 1-14页

作者： Lei Yin Xiaodong Pi Deren Yang State Key Laboratory of silicon Materials and School of Materials Science and Engineering Zhejiang UniversityHangzhou 310027China

High-performance neuromorphic computing(i.e.,brain-like computing)is envisioned to seriously demand optoelectronically integrated artificial neural networks(ANNs)in the *** synaptic devices are critical building blocks for optoelectronically integrated *** the large-scale deployment of high-performance neuromorphic computing in the future,it would be advantageous to fabricate optoelectronic synaptic devices by using advanced silicon(Si)*** calls for the development of Si-based optoelectronic synaptic *** this work we review the use of Si materials to make optoelectronic synaptic devices,which have either two-terminal or three-terminal structures.A series of important synaptic functionalities have been well mimicked by using these Si-based optoelectronic synaptic *** also present the outlook of using Si materials for optoelectronic synaptic devices.

关键词： silicon optoelectronic synaptic devices neuromorphic computing

silicon lithium-ion battery anode with enhanced performance： Multiple effects of silver nanoparticles

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Journal of Materials Science & Technology 2018年第10期34卷 1902-1911页

作者： Shanshan Yin Qing Jia Xiuxia Zuo Shuang Xie Kai Fang Yonggao Xia Jinlong Li Bao Qiu Meimei Wang Jianzhen Ban Xiaoyan Wang Yi Zhang Ying Xiao Luyao Zheng Suzhe Liang Zhaoping Liu Cundong Wang Ya-Jun Cheng Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China North University of China Taiyuan 030051 China The University of Nottingham Ningbo China Ningbo 315100 China Nano Science and Technology Institute University of Science and Technology of China Suzhou 215123 China Department of Materials University of Oxford Parks Rd. OX1 3PH Oxford UK

silicon has been regarded as one of the most promising next generation lithium-ion battery anode. How- ever, the poor cyclic stability of the Si based anode has severely limited its practical applications, which is even worse with high mass loading density （〉1 mg cm^-2 ）. A new concept has been developed to enhance the electrochemical performance of the Si nanoparticle anode. Silver nanoparticles are composited with the silicon nanoparticles in a facile way for the first time. It is found that the mechanical properties of the Si electrode have been significantly improved by the incorporation of the silver nanoparticles, leading to enhanced cyclic performance. With the Si/Ag mass ratio of 4：1, the reversible specific discharge capacity is retained as l 156 mA h g^-1 after 100 cycles at 200 mAg^-1, which is more than three times higher than that of the bare silicon （318 mA h g^-1 ）. The rate performance has been effectively improved as well due to excellent electron conductivity of the silver nanoparticles.

关键词： silicon Silver Nanoparticles Nanocomposite Lithium-ion battery Anode

silicon nanophotonics for on-chip light manipulation

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Chinese Physics B 2018年第10期27卷 46-57页

作者： Jingshu Guo Daoxin Dai Center for Optical and Electromagnetic Research State Key Laboratory for Modern Optical InstrumentationCollege of Optical Science and EngineeringZhejiang UniversityHangzhou 310058China

The field of silicon nanophotonics has attracted considerable attention in the past decade because of its unique advantages,including complementary metal–oxide–semiconductor（CMOS） compatibility and the ability to achieve an ultra-high integration density. In particular, silicon nanophotonic integrated devices for on-chip light manipulation have been developed successfully and have played very import roles in various applications. In this paper, we review the recent progress of silicon nanophotonic devices for on-chip light manipulation, including the static type and the dynamic type. Static onchip light manipulation focuses on polarization/mode manipulation, as well as light nanofocusing, while dynamic on-chip light manipulation focuses on optical modulation/switching. The challenges and prospects of high-performance silicon nanophotonic integrated devices for on-chip light manipulation are discussed.

关键词： silicon nanophotonics polarization mode manipulation nanoplasmonics optical modulator optical switch.

silicon-based on-chip hybrid(de)multiplexers

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Science China(Information Sciences) 2018年第8期61卷 90-103页

作者： Chenlei LI Hao WU Ying TAN Shipeng WANG Daoxin DAI Centre for Optical and Electromagnetic Research State Key Laboratory for Modern Optical InstrumentationCollege of Optical Science and Engineering Zhejiang University

A review is given on the recent progress of silicon-based on-chip hybrid multiplexers, which are the key elements to enable more than one(de)multiplexing techniques simultaneously, including wavelengthdivision-multiplexing(WDM), polarization-division-multiplexing(PDM), and mode-division-multiplexing(MDM). This helps enhance the link capacity of optical interconnects multiplexed with many *** first part gives a review on the recent developed silicon-based hybrid WDM-PDM(de)multiplexers enabling WDM and PDM simultaneously, which helps achieve 2 N channels by introducing N wavelengths and dual polarizations. The recent progress of silicon-based hybrid WDM-MDM(de)multiplexers developed is reviewed in the second part. With the hybrid WDM-MDM(de)multiplexers, one can achieve N × M channels by using N wavelengths and M guided-modes. Finally, the silicon-based hybrid MDM-PDM(de)multiplexers are presented as the key to enhance the link capacity for a single wavelength carrier.

关键词： silicon photonics (de)multiplexing wavelength mode polarization waveguide

silicon-based inorganic-organic hybrid optoelectronic synaptic devices simulating cross-modal learning

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Science China(Information Sciences) 2021年第6期64卷 188-195页

作者： Yayao LI Yue WANG Lei YIN Wen HUANG Wenbing PENG Yiyue ZHU Kun WANG Deren YANG Xiaodong PI State Key Laboratory of silicon Materials School of Materials Science and EngineeringZhejiang University Advanced Semiconductor Research Institute ZJU-Hangzhou Global Scientific and Technological Innovation Center

With advances in Si-based technology infrastructures and the rapid integration of Si-based optoelectronics, Si-based optoelectronic synaptic devices have the potential to greatly facilitate the large-scale deployment of neuromorphic computing. The incorporation of solution-processable polymer semiconductors into Si-based optoelectronics may enable the cost-effective fabrication of optoelectronic synaptic ***(3-hexylthiophene)(P3HT) is a semiconducting polymer used to manufacture optoelectronic synaptic transistors with P3HT channels and Si gates. The gate dielectric between them consists of a *** inorganic-organic Si/P3HT optoelectronic synaptic transistors can mimic synapses when exposed to optical and electrical stimuli. The Si/P3HT synaptic devices can spatiotemporally integrate optical and electrical stimuli to mimic cross-modal learning.

关键词： poly(3-hexylthiophene) silicon optoelectronic synaptic devices cross-modal learning transistor

silicon on Insulator with Highly Uniform Top Si Fabricated by H/He Coimplantation

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Chinese Physics Letters 2019年第6期36卷 103-106页

作者： Xin Su Nan Gao Meng Chen Hong-Tao Xu Xing Wei Zeng-Feng Di State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences University of Chinese Academy of Sciences Shanghai Simgui Technology Co. Ltd.

silicon on insulator with highly uniform top Si is fabricated by co-implantation of H+and He+ions. Compared with the conventional ion-slicing process with H implantation only, the co-implanted specimens whose He depth is deeper than H profile have the top Si layer with better uniformity after splitting. In addition, the splitting occurs at the position that the maximum concentration peak of H overlaps with the secondary concentration peak of He after annealing. It is suggested that the H/He co-implantation technology is a promising approach for fabricating fully depleted silicon on insulator.

关键词： silicon on Insulator H/He Coimplantation secondary concentration peak

silicon-substituted rhodamines for stimulated emission depletion fluorescence nanoscopy

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Chinese Chemical Letters 2022年第1期33卷 133-140页

作者： Ning Wang Yumeng Hao Xiaowei Feng Haidan Zhu Dazhi Zhang Ting Wang Xiaoyan Cui Department of Chemistry School of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200241China Department of Organic Chemistry College of PharmacyNaval Medical University(Second Military Medical University)Shanghai 200433China

As an essential part in the toolbox of super-resolution microscopy,stimulated emission depletion(STED)nanoscopy has been widely explored in revealing the substructure and bioactivities in fluorescence *** the applied STED fluorophores,silicon-substituted rhodamines(SiRs)belong to one of the most extensively employed *** carboxy-SiR was favored in STED bioimaging with many advantages,including reliable photostability,cell permeability,tunable fluorogenicity,feasible structural decoration and so *** reviewed the research of carboxy-SiR in the STED nanoscopy and hopefully this can inspire more efforts in the design and application of STED fluorophores.

关键词： silicon Xanthene Super-resolution Stimulated emission depletion