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Journal of Advanced Ceramics 2023年第9期12卷 1685-1700页

作者： Ping Su Dezhi Kong Huaihao Zhao Shangkun Li Dafeng Zhang Xipeng Pu Changhua Su peiqing cai School of Materials Science and Engineering Shandong Key Laboratory of Chemical Energy Storage and New Battery TechnologyLiaocheng UniversityLiaocheng 252000China College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China

The polarized electric field inside piezoelectric materials has been proven to be a promising technique to boost photogenerated charge ***,a novel flexible SnFe_(2)O_(4)/ZnIn_(2)S_(4)/polyvinylidene fluoride((CH2CF2)_(n),PVDF)(P-SZ)film piezophotocatalyst was successfully synthesized by combining PVDF,an organic piezoelectric material,with a SnFe_(2)O_(4)/ZnIn_(2)S_(4)(SFO/ZIS)type II heterojunction *** hydrogen evolution rate of SFO/ZIS heterojunction with a SFO content of 5%is about 846.79μmol·h^(−1)·g^(−1),which is 3.6 times that of pristine ***,after being combined with PVDF,the optimum hydrogen evolution rate of P-SZ is about 1652.7μmol·h^(−1)·g^(−1)in the presence of ultrasound,which exceeds that of 5%SFO/ZIS by an approximate factor of *** on experimental results,the mechanism of the improved photocatalytic performance of P-SZ was proposed on the basis of the piezoelectric field in PVDF and the formed heterojunction between SFO and ZIS,which effectively boosted the separation of photoinduced *** work provides an efficient strategy for multi-path collection and utilization of natural solar and vibrational energy to enhance photoactivity.

关键词： heterojunction piezophotocatalysis SnFe_(2)O_(4)(SFO) ZnIn_(2)S_(4)(ZIS) polyvinylidene fluoride((CH_(2)CF_(2))_(n),PVDF)film

Re-usable Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF piezo-photocatalytic film with exceptional hydrogen evolution capability triggered by the synergetic advantages of piezoelectricity and S-Scheme heterojunction

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Journal of Energy Chemistry 2024年第9期96卷 164-176页

作者： Ping Su Dong Zhang Minghui Zhu Tengteng Liang Nan Yang Huaihao Zhao Dafeng Zhang Junchang Liu peiqing cai Xipeng Pu School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Science and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Sciencend TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018ZhejiangChina

Piezoelectric materials have advantages of fine-tuning photocatalytic performance through harvesting mechanical energy and open a new avenue in facilitating green catalytic ***,polyvinylidene fluoride(PVDF),a flexible piezoelectric material,was introduced to synthesize a novel Cd_(0.9)Zn_(0.1)S-ZnO@C/PVDF(CZS-ZO@C/PVDF)piezo-photocatalytic film by spin coating and immersion phase conversion *** from the piezoelectricity of PVDF and the internal electric field(IEF)of CZS-ZO@C Step-scheme(S-Scheme)heterojunction,CZS-ZO@C/PVDF was able to induce a hydrogen generation rate of 34.9 mmol g^(−1)h^(−1)activated by ultrasound and visible light(U-L),which is∼17.5 times of Cd_(0.9)Zn_(0.1)S/PVDF(CZS/PVDF)and∼7.4 times of the photocatalysis rate activated by visible light only(L).Piezoelectric measurements and COMSOL simulation illustrated the excellent piezoelectricity of CZS-ZO@C/PVDF film,which exhibits a piezoelectric coefficient(d33)of 9.9 pm V−1 and a piezoelectric potential of 874 mV(under 0.5 MPa).The reaction mechanism for the exceptional piezo-photocatalytic performance was finally disclosed through density functional theory(DFT)calculation and electrochemical *** study enriches the application scope of piezoelectric materials in sustainable energy catalysis and provides a new direction to develop efficient piezoelectric photocatalysts.

关键词： Piezo-photocatalysis Heterojunction Cd_(0.9)Zn_(0.1)S Zno@c PVDF

One stone,three birds:up-conversion,photothermal and p-n heterojunction to boost BiOBr:Yb^(3+),Er^(3+)/Cu_(3)Mo_(2)O_(9) full spectrum photodegradation

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Frontiers of Chemical Science and Engineering 2024年第10期18卷 119-131页

作者： Xintong Yao Dong Zhang Yupeng Liu Yanzhao Chen Dafeng Zhang Junchang Liu Xue-Yang Ji Hengshuai Li peiqing cai Xipeng Pu School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000China School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Science and TechnologyLiaocheng UniversityLiaocheng 252000China College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China

Broadening spectral response range to realize the full spectrum photocatalysis is crucial to develop photocatalysts with satisfactory light-energy conversion ability.A full-spectrum driven p-n heterojunction photocatalytic system was rationally designed through introducing the Er^(3+)/Yb^(3+)co-doped BiOBr with up-conversion effect as the collector of near infrared light and photocatalysts ***,Cu_(3)Mo_(2)O_(9) with the photothermal effect as a heat source to accelerate the reaction at the surface through absorbing the near infrared *** photocatalytic activity of BiOBr:Yb^(3+),Er^(3+)/Cu3Mo2O9 composite was markedly strengthened under visible and near infrared light irradiation,and the BiOBr:Yb^(3+),Er^(3+)/Cu_(3)Mo_(2)O_(9)-5 composite displayed the optimal photodegradation activities for 0.03372 min^(-1) and 0.058 h^(-1),being 2.3-folds and 2.4-folds than that of pure BiOBr:Yb^(3+),Er^(3+)under the visible and near infrared light,*** position of doped ions(Yb^(3+)and Er^(3+))in BiOBr:Yb^(3+),Er^(3+)was determined from the X-ray absorption fine structure *** the reasonable mechanism of p-n heterojunction was proposed base on the results of experimental and density functional theory *** work provides a rational strategy for the design and development of full-spectrum heterojunction photocatalysts with the up-conversion and photothermal effects to increase the photocatalytic performance.

关键词： photocatalyst full spectrum p-n heterojunction photothermal effect up-conversion

Rational construction of CuFe_(2)O_(4)@C/Cd_(0.9)Zn_(0.1)S S-scheme heterojunction photocatalyst for extraordinary photothermal-assisted photocatalytic H_(2) evolution

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Journal of Energy Chemistry 2024年第5期92卷 240-249页

作者： Dong Zhang Minghui Zhu Ran Qin Peixian Chen Maoye Yin Dafeng Zhang Junchang Liu Hengshuai Li Xipeng Pu peiqing cai School of Physics Science and Information Technology Shandong Key Laboratory of Optical Communication Science and TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina School of Materials Science and Engineering Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell TechnologyLiaocheng UniversityLiaocheng 252000ShandongChina College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018ZhejiangChina

Rational design of photocatalyst to maximize the use of sunlight is one of the issues to be solved in photocatalysis *** this study,the CuFe_(2)O_(4)@C/Cd_(0.9)Zn_(0.1)S(CFO@C/CZS)S-scheme photocatalyst with photothermal effect was synthesized by ultrasonic self-assembly combined with *** dark CFO@C absorbed visible light and partly converted into heat to promote the hydrogen evolution *** presence of heterojunctions inhibited the photogenerated electron-hole *** graphite-carbon layer provided a stable channel for electron transfer,and the presence of magnetic CFO made recycle *** the action of photothermal assistance and heterojunction,the hydrogen evolution rate of the optimal CFO@C/CZS was 80.79 mmol g^(-1) h^(-1),which was 2.55 times and 260.61 times of that of pure CZS and CFO@C,***,the composite samples also exhibit excellent stability and a wide range of environmental *** experimental tests and first-principles simulation calculation methods,the plausible mechanism of photoactivity enhancement was *** work provided a feasible strategy of photothermal assistance for the development of heterojunction photocatalysts with distinctive hydrogen evolution.

关键词： Photothermal effect S-scheme heterojunction Photocatalytic hydrogen evolution First-principles calculations

High-performance all-solution-processed inverted quantum dot light-emitting diodes enabled by water treatment

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Nano Research 2023年第7期16卷 10215-10221页

作者： Qianqing Hu Junjie Si Desui Chen Xiaoming Hao Rui Xu Yihang Du Zhuopeng Du Xinquan Gong Hong Zhao peiqing cai Qi Ai Xin Yao Yu Yan Zenan Zhang Muzhi cai Wei Liu Yongyin Kang Zugang Liu College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Key Laboratory of Excited-State Materials of Zhejiang Province State Key Laboratory of Silicon MaterialsDepartment of ChemistryZhejiang UniversityHangzhou 310027China Institute of Flexible Electronics Technology of THU ZhejiangJiaxing Key Laboratory of Flexible Electronics based Intelligent Sensing and Advanced Manufacturing TechnologyJiaxing 314000China Zhejiang Najing Technology Co. Ltd.Quzhou 324004China Najing Technology Corporation Ltd. Hangzhou 310052China

All-solution-processed inverted quantum dot(QD)light-emitting diodes(QLEDs)with transparent bottom cathodes can be directly connected to the n-type thin-film transistors,offering a feasible solution for low-cost active matrix-driven QD ***,the subsequent solution-deposition of the hole-transporting layer destroys the underneath QD films,resulting in largely deteriorated device *** strategies have been implemented to prevent QD film from dissolution,but all at a heavy cost of device performance suffering from either reduced efficiency or increased driving ***,a facile and effective water-treatment approach for QD film to fabricate inverted QLEDs through all solution processing is *** water treatment substitutes the long-chain oleate ligands with hydroxyl groups,resulting in significantly improved non-polar solvent resistance of the QD ***,the QD films reserve their excellent photoluminescence efficiency after water *** the water-treated QD film as the emissive layer,all-solution-processed inverted red QLED with a peak external quantum efficiency of 19.6%,a turn-on voltage of 1.8 V,and a T50 operational lifetime of 150,000 h at 100 cd·m^(-2) was ***,efficient and low-voltage-driven green and blue QLEDs can also be prepared with this *** work provides a feasible strategy for the fabrication of high-performance all-solution-processed inverted QLEDs,paving the way toward achieving QLEDs by all ink-jet printing.

关键词： solvent-resistance quantum dots inverted electroluminescence all solution processing

Thermal stability and spectroscopic properties of Ho^(3+) doped tellurite-borate glasses

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Journal of Rare Earths 2015年第9期33卷 939-945页

作者：杨艳民刘延洲蔡培庆 Ramzi Maalej Hyo Jin Seo College of Physics Science and Technology Hebei University Department of Physics Pukyong National University Laboratoire Géoressources Matériaux Environnement et Changements Globaux Faculty of Sciences of Sfax Sfax University

Ho3＋ ions doped tellurite-borate glass samples with varying compositions were prepared. The compositional dependence on phenomenological Judd-Ofelt parameters was compared in different kinds of rare earth ions doped tellurite-borate glasses. Two methods were used to obtain radiative transition probability of 517 level with the aim of assuring the fitting quality. The integral absorption cross-sections and line shapes corresponding to 518--.5G6 and 518---5I7 transition of Ho3＋ ions were investigated in tellurite-borate glasses. The obtained data indicated that the integral absorption cross-sections corresponding to 518-5G6 transition of Ho3＋ ions mainly depended on phenomenological Judd-Ofelt parameter, g22, because 518---5G6 transition belonged to hypersensitive transitions, which led to a larger gP2 value. The change of line shapes of absorption spectra corresponding to 518-5G6 and 518-517 transitions of Ho3＋ ions came from the lower energy regions, which could be attributed to the changed distribution of Stark levels and thermal population.

关键词： Ho3+ tellurite-borate glasses cross sections line shapes rare earths

基于苯并[b]萘并[1,2-d]噻吩的可见光驱动光环化荧光turn-on型二芳基乙烯的合成与性能研究

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化学学报 2022年第9期80卷 1223-1230页

作者：赵杰王治文李华清艾琦蔡培庆司俊杰姚鑫胡晓光刘祖刚中国计量大学光学与电子科技学院杭州310000 郑州大学材料科学与工程学院郑州450001

可见光驱动光环化的荧光turn-on型二芳基乙烯分子开关是超分辨显微成像的理想材料,但目前关于该类型分子的报道仍较少.本工作合成了一种基于苯并[b]萘并[1,2-d]噻吩(BNTP)的405 nm可见光驱动光环化的荧光turn-on型二芳基乙烯分子BNTP-BT... 详细信息

可见光驱动光环化的荧光turn-on型二芳基乙烯分子开关是超分辨显微成像的理想材料,但目前关于该类型分子的报道仍较少.本工作合成了一种基于苯并[b]萘并[1,2-d]噻吩(BNTP)的405 nm可见光驱动光环化的荧光turn-on型二芳基乙烯分子BNTP-BTTO4,同时系统研究了该分子的光物理性能与稳定性,并借助密度泛函理论(DFT)计算厘清了分子实现可见光驱动光环化及荧光turn-on原因.另外,本研究发现BNTP引入后分子表现出比参比分子Ph-BTTO4更优异的抗疲劳性、热稳定性和光稳定性,尤其是在历经200 min 405 nm可见光照射后,BNTP-BTTO4(c)吸收强度只下降4%,光稳定性大幅提升.本研究为设计开发性能优异的可见光驱动光环化的荧光turn-on型二芳基乙烯提供了新的思路.

关键词：光致变色二芳基乙烯可见光驱动荧光turn-on 苯并[b]萘并[1 2-d]噻吩

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肝脏上皮样血管内皮瘤的影像学特征

中华消化外科杂志 2017年第2期16卷 201-206页

作者：叶枫蒋力明宋颖马沛卿欧阳汉蔡建强国家癌症中心/中国医学科学院北京协和医学院肿瘤医院影像诊断科北京100021

目的：总结肝脏上皮样血管内皮瘤（EHE）的影像学特征。方法：采用回顾性描述性研究方法。收集2012年6月至2016年6月中国医学科学院肿瘤医院收治的9例肝脏EHE患者的临床病理资料。患者行CT和MRI检查。由2名高年资影像科医师分析病灶的... 详细信息

目的：总结肝脏上皮样血管内皮瘤（EHE）的影像学特征。方法：采用回顾性描述性研究方法。收集2012年6月至2016年6月中国医学科学院肿瘤医院收治的9例肝脏EHE患者的临床病理资料。患者行CT和MRI检查。由2名高年资影像科医师分析病灶的数目、大小、部位、形态、密度或信号、强化方式、有无病灶融合、与血管的关系等特征。病灶数量按肝左叶、肝右叶、肝尾状叶计数，5个以下计实数，否则计为≥5个。观察指标：（1）肝脏EHE的总体影像学特征。（2）肝脏EHE的MRI检查表现。（3）肝脏EHE的CT检查表现。（4）肝脏EHE的治疗和病理学特征及随访结果。患者经影像学检查后行相应治疗。术后采用门诊影像学检查方式进行随访，随访内容为肿瘤复发及病情稳定情况。随访时间截至2016年12月。结果：（1）肝脏EHE的总体影像学特征：9例肝脏EHE患者中，6例行MRI平扫及增强扫描，3例行CT平扫及增强扫描（1例同时行MRI检查），1例仅行CT增强扫描。肝右叶病灶数量多于肝左叶，肝尾状叶最少，病灶呈圆形或类圆形，病灶最大直径为2.5～6.1 cm，平均直径为3.6 cm。9例患者中， 4例总病灶数为2～5个，单叶肝脏病灶数量〈5个；病灶均无融合趋势，1例有晕环征及被膜皱缩，1例仅有晕环征。其余5例中2例有1个肝叶病灶数≥5个，3例有2个肝叶病灶数≥5个；4例均有晕环征、“棒棒糖”征、被膜皱缩及病灶融合趋势，1例有晕环征及被膜皱缩。9例患者中，出现晕环征占7/9，“棒棒糖”征占4/9，肝被膜皱缩占6/9，病灶融合趋势占4/9。（2）肝脏EHE的MRI检查影像学表现：6例患者行MRI平扫及增强扫描检查。①4例患者T2加权成像和增强扫描门静脉期、肝胆期显示晕环征较好：3例T2加权成像表现为中心较高信号，外围稍高信号厚环；1例表现为中心较高信号，外周稍低薄环信号，对应增强扫描可见相应晕环样表现；2例肝胆期晕环表现明显，表现为中心高信号、外围低信号。部分患者合并多种表现。②2例患者T2加权成像示无明显晕环表现，增强扫描动脉期边缘环形强化，门静脉期和肝胆期无明显典型晕环表现。6例患者的肝脏病灶T1加权成像均表现为低信号，弥散加权成像表现为中高信号。（3）肝脏EHE的CT检查影像学表现：4例患者行CT检查平扫呈稍低密度，未见钙化；3例增强扫描晕环样强化，以门静脉期显示较为明显，相比于MRI检查晕环表现略不明显。（4）肝脏EHE的治疗和病理学特征及随访结果：9例肝脏EHE患者，4例因病灶数≤5个行手术切除治疗，取手术标本行病理学检查；5例行介入治疗，穿刺行病理学检查。大体标本检查显示病灶切面灰白、实性、质地坚硬，具有浸润性边缘。镜下可见肿瘤细胞由上皮样细胞组成，无异型性，核分裂象罕见，细胞胞质内可见空泡。免疫组织化学染色检测显示：CD31和CD34阳性。9例患者均获得随访，随访时间为6～54个月。随访期间，4例经手术治疗患者肿瘤均未复发，5例介入治疗患者病情稳定。结论：肝脏EHE病灶数越多，影像学表现越典型；肝脏EHE可融合，有晕环征、肝被膜皱缩、“棒棒糖”征，T2加权成像压脂、门静脉期和肝胆期影像学表现有助于提高肝脏EHE的诊断。

关键词：肝脏上皮样血管内皮瘤体层摄影术磁共振成像诊断

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复杂小断块油气藏地层倾角应用效果分析

石油仪器 2001年第3期15卷 13-17页

作者：朱佩清蔡晓明孙锦富江都江苏油田地质测井处 225265

论述了如何利用工作站和微机联合处理地层倾角资料的新方法，通过Ｅｘｃｅｌ９７软件对倾角资料的处理和图件绘制，能够高效直观识别各种地质现象，定量判断椭圆井眼发育情况，并以二口井倾角资料分析认为：地层倾角测井在复杂小断块... 详细信息

论述了如何利用工作站和微机联合处理地层倾角资料的新方法，通过Ｅｘｃｅｌ９７软件对倾角资料的处理和图件绘制，能够高效直观识别各种地质现象，定量判断椭圆井眼发育情况，并以二口井倾角资料分析认为：地层倾角测井在复杂小断块油气藏应用效果显著，是精细评价地震解释构造是否落实最为经济、可靠的手段。

关键词：复杂油气藏断块油气藏地层倾角测井评价地震解释构造曲线

双层膦氧化物分子修饰制备高效的大面积纯蓝光钙钛矿量子点发光二极管

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Science Bulletin 2023年第20期68卷 2354-2361,M0005页

作者：陈芳刘延亮张丁铄蒋馨祎蔡培庆司俊杰胡乾庆房至善戴兴良宋继中叶志镇何海平 School of Materials Science and Engineering State Key Laboratory of Silicon MaterialsZhejiang UniversityHangzhou 310027China Wenzhou Key Laboratory of Novel Optoelectronic and Nano Materials and Engineering Research Centre of Zhejiang Province Institute of WenzhouZhejiang UniversityWenzhou 325006China Wenzhou XINXINTAIJING Tech.Co.Ltd. Wenzhou 325006China Materials Interfaces Center Shenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China College of Optical and Electronic Technology China Jiliang UniversityHangzhou 310018China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030002China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450052China

蓝光卤素钙钛矿发光二极管(LED)由于其高色纯度和全色钙钛矿LED发展需求目前受到越来越多的关注.通过钝化卤素钙钛矿中的缺陷来提高LED性能是主要研究方向,然而,用于有效钝化混合卤素蓝光钙钛矿并获得性能优异、光谱稳定的纯蓝光LED方... 详细信息

蓝光卤素钙钛矿发光二极管(LED)由于其高色纯度和全色钙钛矿LED发展需求目前受到越来越多的关注.通过钝化卤素钙钛矿中的缺陷来提高LED性能是主要研究方向,然而,用于有效钝化混合卤素蓝光钙钛矿并获得性能优异、光谱稳定的纯蓝光LED方法还很有限.本文开发了一种使用含有膦氧基团的双层有机分子对混合卤素蓝光钙钛矿量子点进行固相修饰,不仅有效提高了量子点薄膜的发光性能,而且有效改善了LED的电荷平衡,显著提高了器件性能,获得了最大外量子效率为4.87%的纯蓝光LED(469 nm).作者发现双层膦氧分子与量子点之间可以发生强相互作用,从而有效钝化量子点,并有助于获得大面积单层钙钛矿量子点薄膜.其中,发光面积为64 mm2,波长为469 nm的LED最大外量子效率为3.91%.本文所述策略有助于推动性能优异的大面积钙钛矿量子点光电器件开发.

关键词：外量子效率蓝光LED 量子点发光二极管光电器件器件性能电荷平衡钙钛矿强相互作用