检索结果-南通市图书馆

Synergetic PVA degradation and H2 evolution in photocatalytic fuel cells using Ag@Fe_(2)O_(3) cathode

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2024年第1期18卷 85-93页

作者： Likun Sun Kesi Xiong Baoning Zhang Jinghong Fang Yingchao He Min Wang zhixing gan Fanglin Du Qiong Sun Liyan Yu Lifeng Dong College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationNanjing Normal UniversityNanjing 210023China Department of Physics Hamline UniversitySt.Paul 55104USA

In a dual-chamber photocatalytic fuel cell device,polyvinyl alcohol degradation and H2 evolution were concurrently *** setup involved commercial P25 as the photoanode and Ag@Fe_(2)O_(3) nanoparticles as the ***,the feasibility of a Fentonlike reaction in the cathode,utilizing Fe^(2+)ions and pumped O_(2),was *** cathode materials,polyvinyl alcohol types,and pH values’effects were assessed on device *** tests highlighted photoinduced holes(h+)and OH·radicals as pivotal contributions to polyvinyl alcohol ***-term stability of the device was established through cycling experiments.

关键词： photocatalytic fuel cell PVA Ag@Fe_(2)O_(3) cathode materials Fenton-like reaction

Increase of photoluminescence blinking frequency of 3C–SiC nanocrystals with excitation power

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics B 2018年第12期27卷 136-140页

作者： zhixing gan Weiping Zhou Ming Meng Center for Quantum Transport and Thermal Energy Science Key Laboratory of Optoelectronic Technology of Jiangsu ProvinceSchool of Physics and Technology Nanjing Normal University School of Science Nanjing University of Science and Technology School of Physics and Telecommunication Engineering Zhoukou Normal University

Super-resolution optical fluctuation imaging is dependent on the blinking frequency of ***,improvement of the photoluminescence(PL)blink frequency is *** is achieved for 3C–SiC nanocrystals(NCs)by simply increasing the excitation *** an excitation of 488 nm with powers of 5μW to 50μW,individual 3C–SiC NC always exhibits PL blinking with a short on-state sojourn time(<0.1 s).A fast Fourier transform method is exploited to determine the PL switching *** is found that the frequency of the bright state increases from 2 Hz to 20 Hz as the excitation power increases from 5μW to 50μW,which is explained by the Auger photonionization model.

关键词： photoluminescence nanocrystals blinking Auger photonionization

Design and mechanism insight on SiC quantum dots sensitized inverse opal TiO_(2) with superior photocatalytic activities under sunlight

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2023年第12期17卷 1913-1924页

作者： Yingchao He Qiong Sun Likun Sun zhixing gan Liyan Yu Lifeng Dong College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationNanjing Normal UniversityNanjing 210023China Department of Physics Hamline UniversitySt.PaulMN 55104USA

The combination of SiC quantum dots sensitized inverse opal TiO_(2) photocatalyst is designed in this work and then applied in wastewater purification under simulated *** various spectroscopic techniques,it is found that electrons transfer directionally from SiC quantum dots to inverse opal TiO_(2),and the energy difference between their conduction/valence bands can reduce the recombination rate of photogenerated carriers and provide a pathway with low interfacial resistance for charge transfer inside the *** a result,a typical type-II mechanism is proved to dominate the photoinduced charge transfer ***,the composite achieves excellent photocatalytic performances(the highest apparent kinetic constant of 0.037 min^(-1)),which is 6.2 times(0.006 min^(-1))and 2.1 times(0.018 min^(-1))of the bare inverse opal TiO_(2) and commercial P25 ***,the stability and non-toxicity of SiC quantum dots sensitized inverse opal TiO_(2) composite enables it with great potential in practical photocatalytic applications.

关键词： inverse opal TiO_(2) silicon carbide quantum dots quantum dot sensitized photocatalyst type-II charge transfer route

Unidirectionally aligned diphenylalanine nanotube/ microtube arrays with excellent supercapacitive performance

在线全文

学校读者我要写书评

暂无评论

Nano Research 2014年第6期7卷 929-937页

作者： Jinlei Zhang Xinglong Wu zhixing gan Xiaobin Zhu Yamin Jin National Laboratory of Solid State Microstructures and Department of Physics Nanjing University Nanjing 210093 China

High-temperature （150-220 ℃） growth leads to the formation of some peptide nanotube/microtube （NT/MT） arrays but the NTs/MTs exhibit closed ends, irreversible phase modification and eliminations of piezoelectric and hydrophilic properties. Here we demonstrate the fabrication of unidirectionally aligned and stable diphenylalanine NT/MT arrays with centimeter scale area at room temperature by utilizing an external electric field. The interactions between the applied electric field and dipolar electric field on the NTs and surface positive charges are responsible for the formation. The unidirectionally aligned MT array exhibits a supercapacitance of 1,000 μF·cm^-2 at a scanning rate of 50 mV·s^-1; this is much larger than the values reported previously in peptide NT/MT arrays.

关键词： FF nanotubes/microtubes aligned growth surface charge supercapacitance

The origins of the broadband photoluminescence from carbon nitrides and applications to white light emitting

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2016年第6期9卷 1801-1812页

作者： zhixing gan Yun Shan Jiarui Chen Qingfeng Gui Qizhen Zhang Shouping Nie Xinglong Wu Key Laboratory of Optoelectronic Technology of Jiangsu Province School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China Key Laboratory of Modern Acoustics MOE Institute of Acoustics Collaborative Innovation Center of Advanced Microstructures National Laboratory of Solid State Microstructures Nanjing University Nanjing 210093 China School of Environmental Science Nanjing Xiaozhuang University Nanjing 211171 China

Carbon nitrides synthesized by thermal polycondensation of melamine at 700 ~C exhibit photoluminescence （PL） ranging from 400 to 650 nm. This broad PL is attributed to band to band transitions and bandtail transitions of lone pair （LP） states of intra-tri-s-triazine and inter-tri-s-triazine nitrogens. The proposed PL mechanism is further confirmed by diffusion reflectance spectroscopy, as well as time-resolved and temperature-dependent PL. This intense fluorescence is stable at different pH and resistant to UV exposure, suggesting that this inexpensive broadband luminescent material could be significant for white- light-emitting （WLE） applications. Thus, quasi-WLE films and membranes with designed patterns are fabricated by embedding the carbon nitrides into polymethyl methacrylate. Moreover, even broader PL （400 to 740 nm） is acquired in com- posite films composed of carbon nitrides, further suggesting that the carbon nitrides are robust candidates for WLE.

关键词： photoluminescence carbon nitrides thermal polycondensation white light emission

Ultrahigh quantum efficiency photodetector and ultrafast reversible surface wettability transition of square In2O3 nanowires

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2017年第8期10卷 2772-2781页

作者： Ming Meng Xinglong Wu Xiaoli Ji zhixing gan Lizhe Liu Jiancang Shen Paul K. Chu School of Physics and Telecommunication Engineering Zhoukou Normal University Zhoukou 466001 China Key Laboratory of Modern Acoustics MOE Institute of Acoustics Collaborative Innovation Center of Advanced Microstructures Notional Laboratory of Solid State Microstructures Nanjing University Nonjing 210093 China School of Electronic Science and Engineering Nanjing University Nanjing 210093 China Key Laboratory of Optoelectronic Technology of Jiangsu Province School of Physical Science and Technology Nanjing Normal University Nanjing 210023 China Department of Physics and Materials Science City University ofHong Kong Tat Chee Avenue Kowloon Hong Kong China

Due to a large surface-to-volume ratio, the optoelectronic performance of low- dimensional semiconductor nanostructure-based photodetectors depends in principle on chemisorption/photodesorption at the exposed surface, but practical examples that show such an effect are still unavailable. Some theoretical calculations have predicted that the {001} facets of In2O3 can effectively accumulate photogenerated holes under irradiation, providing a model material to examine whether the facet cutting of nanowires （NWs） can boost their optoelectronic performance. Herein, we present the design and construction of a novel nanowire-based photodetector using square In2O3 NWs with four exposed {001} crystal facets. The photodetector delivers excellent optoelectronic performance with excellent repeatability, fast response speed, high spectral responsivity （Rλ）, and high external quantum efficiency （EQE）. The Rλ and EQE values are as high as 4.8 × 10^6 A/W and 1.46 × 10^9%, respectively, which are larger than those of other popular semiconductor photodetectors. In addition, the square In2O3 NWs show hydrophobic wettability as manifested by a contact angle of 118° and a fast photoinduced reversible switching behavior is observed.

关键词： square In2O3 nanowires crystal facet photodetector reversible wettability transition

All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国科学:技术科学英文版 2023年第9期66卷 2735-2742页

作者： WANG Yun ZHA YanFang YANG YunYi LIU CiHui DI YunSong CAO GuiYuan WEI ShiBiao CHEN ZhiHui gan zhixing Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationSchool of Artificial IntelligenceNanjing Normal UniversityNanjing 210023China Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthorn VIC 3122Australia Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceCollege of Electronic Information and Optical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence(PL) from perovskite nanocrystals(PNCs). A hierarchical photonic crystal(Hie PhC) is developed by self-assembling polystyrene(PS) and SiO2nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene(PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios(CR) of 24.7 and 74.0 dB, ***-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.

关键词： perovskite nanocrystals photonic crystals all-optical logic gates modulation of photoluminescence

Tunable Multicolor Fluorescence of Perovskite-Based Composites for Optical Steganography and Light-Emitting Devices

在线全文

学校读者我要写书评

暂无评论

Research 2023年第1期2022卷 185-195页

作者： Kewei Ma Qingfeng Gui Cihui Liu Yunyi Yang Fangjian Xing Yunsong Di Xiaoming Wen Baohua Jia zhixing gan Center for Future Optoelectronic Functional Materials School of Computer and Electronic Information/School of Artificial IntelligenceNanjing Normal UniversityNanjing 210023China College of Naval Architecture and Ocean Engineering Jiangsu Maritime InstituteNanjing 211170China Centrefor Translational Atomaterials Schoolof ScienceSwinburne University of TechnologyJohn Street Hawthon VIC3122Australia School of Science RMIT UniversityMelbourne3000 VICAustralia College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042China

Multicolor fluorescence of mixed halide perovskites enormously enables their applications in photonics and ***,it remains an arduous task to obtain multicolor emissions from perovskites containing single halogen to avoid phase ***,a fluorescent composite containing Eu-based metal-organic frameworks(MOFs),OD Cs PbBre,and 3D CsPbBrs is *** excitations at 365 nm and 254nm,the pristine composite emits blue(B)and red(R)fluorescence,which are ascribed to radiative defects within CsPbBr and 5Do→7F,transitions of Eu^(3+),***,after light soaking in the ambient environment,the blue fluorescence gradually converts into green(G)emission due to the defect repairing and 0D-3D phase *** permanent and unique photochromic effect enables anticounterfeiting and microsteganography with increased security through a micropatterning ***,the RGB luminescence is highly stable after encapsulation by a transparent polymer ***,trichromatic light-emitting modules are fabricated by using the fluorescent composites as color-converting layers,which almost fully cover the standard color ***,this work innovates a strategy for construction of tunable multicolor luminescence by manipulating the radiative defects and structural dimensionality.

关键词： composite composites perovskite

线性变位极谱法研究(Ⅸ)——CAEM过程配位吸附溶出可逆波理论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高等学校化学学报 1989年第7期10卷 696-699页

作者：甘知行宗慧民张祖训南京大学化学系

本文报遣CAEM过程配位吸附溶出可逆出理论,用铟(Ⅲ)-钢铁试剂-醋酸和醋酸钠缓冲体系进行验证,实验结果与理论相符。

关键词：线性变位极谱法吸附溶出可逆波铟(Ⅲ) 铜铁试剂配合物配位吸附