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Molecular engineering of Y-series acceptors for nonfullerene organic solar cells

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SusMat 2022年第5期2卷 591-606页

作者： Qiao He Petr Ufimkin Filip Aniés xiantao hu Panagiota Kafourou Martina Rimmele Charlotte L.Rapley Bowen Ding Department of Chemistry and Centre for Processable Electronics Imperial College LondonLondonUK

The power conversion efficiencies(PCEs)of single-junction organic solar cells(OSCs)have surpassed 19%,owing to the emerging Y-series nonfullerene acceptors(NFAs).Undoubtedly,the power and flexibility of chemical design has been a strong driver for this rapid efficiency improvement in the OSC *** the course of the past 3 years,a variety of modifications have been made to the structure of the Y6 acceptor,and a large number of Y-series NFAs have been reported to further improve ***,we present our insights into the rationale behind the Y6 acceptor and discuss the design principles toward high-performance Y-series *** is clear that structural modifications through choice of heteroatom,soluble chains,πspacers,central cores,and end groups alter the material characteristics and properties,contributing to distinctive photovoltaic ***,we analyze various design strategies of Y-series-containing materials,including polymerized small-molecule acceptors(PSMA),non-fused-ring acceptors(NFRA),and all-fused-ring acceptors(AFRA).This review is expected to be of value in providing effective molecular design strategies for high-performance NFAs in future innovations.

关键词： molecular engineering narrow bandgap nonfullerene organic solar cell Y-series acceptor

Nitrate-group-grafting-induced assembly of rutile TiO2 nanobundles for enhanced photocatalytic hydrogen evolution

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Chinese Journal of Catalysis 2020年第1期41卷 95-102页

作者： Heng Wang xiantao hu Yajuan Ma Dajian Zhu Tao Li Jingyu Wang Key Laboratory of Materials Chemistry for Energy Conversion and Storage(Ministry of Education) Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina

In this study,an acid-induced assembly strategy for a rutile TiO2 photocatalyst was proposed on the basis of the treatment of lamellar protonated titanate with a concentrated HNO3 *** groups were successfully grafted onto a TiO2 surface and induced the assembly of rutile TiO2 nanorods into uniform spindle-like *** resulting TiO2 product achieved a photocatalytic hydrogen evolution rate of 402.4μmol h^?1,which is 3.1 times higher than that of Degussa *** was demonstrated that nitrate group grafting caused the rutile TiO2 surface to become negatively charged,which is favorable for trapping positive protons and improving charge carrier separation,thereby enhancing photocatalytic hydrogen ***,surface charges were crucial to structural stability based on electrostatic *** study not only developed a facile surface modification strategy for fabricating efficient H2 production photocatalysts but also identified an influence mechanism of inorganic acids different from that reported in the literature.

关键词： Acid modification Rutile TiO2 Surface grafting H2 production Photocatalysis

南方地区生产建设项目表土保护利用方案探讨——以安徽省桐城抽水蓄能电站为例

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广东水利水电 2021年第8期 112-116,126页

作者：胡利强段东亮胡宪涛姚成平广东省水利电力勘测设计研究院有限公司广东广州510635

生产建设项目占压扰动地表、损毁地表植被及土地资源。该文从表土保护利用必要性、表土保护利用总体思路、表土需求量及开挖量、表土堆存及管护措施等方面进行探讨,指出在满足工程建设需要的前提下,应保护利用表土,以减低工程建设对土... 详细信息

生产建设项目占压扰动地表、损毁地表植被及土地资源。该文从表土保护利用必要性、表土保护利用总体思路、表土需求量及开挖量、表土堆存及管护措施等方面进行探讨,指出在满足工程建设需要的前提下,应保护利用表土,以减低工程建设对土地资源的侵占影响,贯彻落实水土保持生态文明的要求。

关键词：土地资源表土保护利用生产建设项目水土保持生态文明

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应用气相色谱法测定汽油族组成

燃料化学学报 1988年第1期 93-96页

作者：郭先涛胡丽芝中国科学院山西煤炭化学研究所中国科学院山西煤炭化学研究所太原

萤光色层法是分析汽油族组成的标准方法,但该法费时较长,界面不易测准,误差较大,因此近年来国内外发展了将气相色谱法用于此分析。最初提出的是用过氯酸汞吸附烯烃,然后由烷烃、烯烃总和中扣除烷烃而求得烯烃,因而烯烃误差较大。后来用... 详细信息

萤光色层法是分析汽油族组成的标准方法,但该法费时较长,界面不易测准,误差较大,因此近年来国内外发展了将气相色谱法用于此分析。最初提出的是用过氯酸汞吸附烯烃,然后由烷烃、烯烃总和中扣除烷烃而求得烯烃,因而烯烃误差较大。后来用硫酸铜作烯烃吸附剂,低温吸附,高温解吸,可直接测出烯烃含量。但硫酸铜吸附剂制备过程复杂,而且以硅胶为载体,其不可逆吸附性难以克服,因此高碳数烃回收率较低。1986年陆婉珍、付文慧改用Chromosorb W为吸附剂担体取得了较好的结果。

关键词：气相色谱法不可逆吸附硅胶吸附剂分子筛柱烷烃饱和脂肪族烃族组成担体燃料油汽油

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基于孪生网络的目标跟踪算法研究进展

广西师范大学学报（自然科学版） 2022年第5期40卷 90-103页

作者：梁启花胡现韬钟必能于枫李先贤广西多源信息挖掘与安全重点实验室(广西师范大学) 广西桂林541004 东南大学计算机网络和信息集成教育部重点实验室江苏南京211189

目标跟踪是计算机视觉领域中最为核心的基础研究问题之一,其能够协同高层视频应用分析和研究,具有重要的理论价值、广泛的实用价值和多学科交叉性,成为学术界、工业界以及国家战略的关注焦点。由于跟踪场景复杂度高、干扰强,目标表观变... 详细信息

目标跟踪是计算机视觉领域中最为核心的基础研究问题之一,其能够协同高层视频应用分析和研究,具有重要的理论价值、广泛的实用价值和多学科交叉性,成为学术界、工业界以及国家战略的关注焦点。由于跟踪场景复杂度高、干扰强,目标表观变化多样性以及多模态信息融合等因素,使得跟踪器需要均衡鲁棒性、准确性以及实时性等性能衡量指标。目前,已有很多工作从不同视角解决目标跟踪领域中的挑战,但是在多维度性能指标的衡量下,仍然不能很好地克服复杂场景下的跟踪问题。本文通过基于孪生网络的目标跟踪算法,回顾领域发展现状,探讨存在的挑战,展望未来值得关注的研究方向,为该领域未来的研究工作提供借鉴和参考。

关键词：计算机视觉目标跟踪视频应用与分析多模态孪生网络

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抽水蓄能电站工程中的土壤流失预测

水利科学与寒区工程 2023年第12期6卷 80-83页

作者：唐磊胡宪涛黄明李新尧广东省水利电力勘测设计研究院有限公司广东广州510635

本文采用《生产建设项目土壤流失量测算导则》(SL 773—2018)进行抽水蓄能电站工程土壤流失量预测,依据不同预测单元水土流失特点,同一预测单元细化成不同扰动类型分别计算土壤侵蚀模数,以期获得较为准确的土壤流失预测结果,以分析土壤... 详细信息

本文采用《生产建设项目土壤流失量测算导则》(SL 773—2018)进行抽水蓄能电站工程土壤流失量预测,依据不同预测单元水土流失特点,同一预测单元细化成不同扰动类型分别计算土壤侵蚀模数,以期获得较为准确的土壤流失预测结果,以分析土壤流失重点时段和区域,为项目后续有针对性布设水土保持措施提供依据。

关键词：水土流失预测抽水蓄能电站土壤侵蚀模数

A Highly Ordered Hydrophilic–Hydrophobic Janus Bi-Functional Layer with Ultralow Pt Loading and Fast Gas/Water Transport for Fuel Cells

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Energy & Environmental Materials 2021年第1期4卷 126-133页

作者： xiantao Meng Xiang Deng Liusheng Zhou Bin hu Wenyi Tan Wei Zhou Meilin Liu Zongping Shao State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China School of Environmental Engineering Nanjing Institute of TechnologyNanjing 211167China Center for Innovative Fuel Cell and Battery Technologies School of Materials Science and EngineeringGeorgia Institute of TechnologyAtlanta GA 30332-0245USA Department of Chemical Engineering Curtin UniversityPerth 6845Australia

One of the critical challenges that limit broad commercialization of proton exchange membrane fuel cells(PEMFC)is to reduce the usage of Pt while maintaining high power output and sufficient ***,a novel bifunctional layer consisting of vertically aligned carbon nanotubes(VACNTs)and nanoparticles of Pt-Co catalysts(Pt-Co/VACNTs)is reported for highperformance *** prepared by a two-step process,the Pt-Co/VACNTs layer with a hydrophilic catalyst-loaded side and a hydrophobic gas diffusion side enables a PTFE-free electrode structure with fully exposed catalyst active sites and superior gas–water diffusion *** tested in a PEMFC,the bi-functional Pt-Co/VACNTs layer with ultralow Pt loading(~65μgcathodecm-2)demonstrates a power density of 19.5 kW gPt cathode-1 at 0.6 V,more than seven times that of a cell with commercial Pt/C catalyst(2.7 kW gPt cathode-1 at 0.6 V)at a loading of 400μgcathodecm-2 tested under similar *** remarkable design of VACNTs-based catalyst with dual functionalities enables much lower Pt loading,faster mass transport,and higher electrochemical performance and ***,the preparation procedure can be easily scaled up for low-cost fabrication and commercialization.

关键词： bi-functional layer hydrophilic-hydrophobic janus proton exchange membrane fuel cells vertically aligned carbon nanotube arrays

Structural characterization and temperature-dependent luminescence of CaF2：Tb^(3＋)/Eu^(3＋) glass ceramics

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Journal of Rare Earths 2017年第6期35卷 536-541页

作者： hu Fangfang ZHAO Zhangmei CHI Fengfeng WEI xiantao YIN Min Key Laboratory of Strongly-Coupled Quantum Matter Physics Chinese Academy of Sciences School of Physical Sciences University of Science and Technol- ogy of China HeJei 230026 China

Tb^3＋/Eu^3＋ co-doped transparent glass ceramics containing CaF2 nanocrystals were successfully synthesized by high temperature melt-quenching method and subsequent heating. The structure and morphology of the samples were investigated by X-ray diffraction（XRD）, transmittance electron microscopy（TEM）, high resolution TEM（HRTEM） and selected area electron diffraction（SAED）. The photoluminescence properties and energy transfer process from Tb^3＋ to Eu^3＋ of CaF2：Tb^3＋,Eu^3＋ phosphors were also investigated through excitation spectra and decay curves. In addition, the emission spectra of the glass ceramics in a wide temperature range from 21 to 320 K were recorded under the excitation of 485 nm. It was found that the fluorescence intensity ratios of Tb^3＋ at 545 nm（^5D4→^7F5） to Eu^3＋ at 615 nm（^5D0→^7F2） was highly temperature-dependent with an approximate linear relationship, and the temperature sensitivity was about 0.4%/K. It is expected that the investigated Tb^3＋/Eu^3＋ co-doped CaF2 glass ceramics may have prospective application in optical thermometry.

关键词： ceramics Eu luminescence SAED transparent subsequent excitation transmittance heating approximate

Engineering high amylose and resistant starch in maize by CRISPR/Cas9-mediated editing of starch branching enzymes

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The Crop Journal 2024年第4期12卷 1252-1258页

作者： Mingzheng Ma Shanqiu Sun Jinjie Zhu xiantao Qi Gaoke Li Jianguang hu Chuanxiao Xie Changlin Liu State Key Laboratory of Crop Gene Resources and Breeding Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081China Hainan Yazhou Bay Seed Lab Sanya 572024HainanChina Anhui Agricultural University Hefei 230036AnhuiChina Crops Research Institute Guangdong Academy of Agricultural SciencesGuangzhou 510640GuangdongChina

To improve the amylose content(AC)and resistant starch content(RSC)of maize kernel starch,we employed the CRISPR/Cas9 system to create mutants of starch branching enzyme I(SBEI)and starch branching enzyme IIb(SBEIIb).A frameshift mutation in SBEI(E1,a nucleotide insertion in exon 6)led to plants with higher RSC(1.07%),lower hundred-kernel weight(HKW,24.71±0.14 g),and lower plant height(PH,218.50±9.42 cm)compared to the wild type(WT).Like the WT,E1 kernel starch had irregular,polygonal shapes with sharp edges.A frameshift mutation in SBEIIb(E2,a four-nucleotide deletion in exon 8)led to higher AC(53.48%)and higher RSC(26.93%)than that for the WT.E2 kernel starch was significantly different from the WT regarding granule morphology,chain length distribution pattern,X-ray diffraction pattern,and thermal characteristics;the starch granules were more irregular in shape and comprised typical B-type *** SBEI and SBEIIb(E12)had a synergistic effect on RSC,HKW,PH,starch properties,and starch biosynthesis-associated gene ***,SS1,SSIIa,SSIIIa,and SSIIIb were upregulated in E12 endosperm compared to WT *** study lays the foundation for rapidly improving the starch properties of elite maize lines.

关键词： Maize Gene editing Starch branching enzyme I Starch branching enzyme IIb