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Journal of Materials Science & Technology 2020年第21期56卷 179-188页

作者： Minghui Xiong juntao yan Bo Chai Guozhi Fan Guangsen Song School of Chemical and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023China

Fabrication of 2D/2D heterojunction photocatalysts have attracted more attentions due to their inherent merits involving the large contact interface,short charge migration distance and plentiful active sites,which are beneficial for the enhancement of photocatalytic ***,a series of 2D/2D MoS_(2)/Cd S type-I heterojunctions were prepared by incorporation the exfoliating of bulk CdS and MoS_(2) with postsintering *** characteristic techniques were employed to corroborate the formation of *** optimizing the 2D MoS_(2) amounts in the heterojunction,the 7 wt.%2D/2D MoS_(2)/CdS heterojunction displayed the maximal photocatalytic H2 evolution rate of 18.43 mmol h^(-1) g^(-1) under visible light irradiation in the presence of lactic acid as the sacrificial reagent,which was 6 times higher than that of pristine 2D *** on the photoelectrochemical and photoluminescence spectra tests,it could be deduced that the charge separation and transfer of 2D/2D MoS_(2)/CdS heterojunction was tremendously improved,and the recombination of photoinduced electron-hole pairs was effectively ***,the 2D MoS_(2) was used as a cocatalyst to provide the abundant active sites and lower the overpotential for H_(2) generation *** current work would offer an insight to fabricate the 2D/2D heterojunction photocatalysts for splitting H_(2)O into H_(2).

关键词： 2D/2D heterojunctions Photocatalytic H_(2)evolution Cocatalysts Charge separation and transfer

2D S-Scheme Heterojunction Photocatalyst

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物理化学学报 2024年第10期40卷 1-2页

作者： juntao yan Liang Wei College of Chemistry and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023China Guangxi Key Laboratory of Natural Polymer Chemistry and Physics Nanning Normal UniversityNanning 530100China

The application of photocatalytic technology in H_(2) production,CO_(2) reduction,H_(2)O_(2) production,and pollutant degradation provides a promising approach to the alleviation of energy shortage and environmental issues ***,hindered by the easy recombination of electron-hole pairs,single-component photocatalysts usually exhibit inferior *** heterojunction photocatalysts is a valid method which can improve charge separation and attain high catalytic efficiencies4.

关键词： separation shortage pollutant

Photocatalytic hydrogen evolution activity over MoS_2/ZnIn_2S_4 microspheres

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Chinese Journal of Catalysis 2017年第12期38卷 2067-2075页

作者： Bo Chai Chun Liu Chunlei Wang juntao yan Zhandong Ren School of Chemical and Environmental Engineering Wuhan Polytechnic University Wuhan 430023 Hubei China

MoS2/ZnIn2S4composites with MoS2anchored on the surface of ZnIn2S4microspheres were synthesized by a two‐step hydrothermal *** obtained samples were characterized by X‐ray diffraction,field emission scanning electron microscopy,energy dispersive X‐ray spectroscopy,high‐resolution transmission electron microscopy,X‐ray photoelectron spectroscopy,Raman spectroscopy,ultraviolet–visible diffuse reflectance absorption spectroscopy,nitrogen adsorption–desorption measurements,photoluminescence spectroscopy,and photoelectrochemical *** influence of the loading of MoS2on the photocatalytic H2evolution activity was investigated using lactic acid as a sacrificial reagent.A H2evolution rate of343μmol/h was achieved under visible light irradiation over the1wt%MoS2/ZnIn2S4composite,corresponding to an apparent quantum efficiency of about3.85%at420nm monochromatic *** marked improvement of the photocatalytic H2evolution activity compared with ZnIn2S4can be ascribed to efficient transfer and separation of photogenerated charge carriers and facilitation of the photocatalytic H2evolution reaction at the MoS2active sites.

关键词： Composite Cocatalyst Photocatalytic hydrogen evolution Charge carrier Separation

In situ fabrication of CdMoO4/g-C3N4 composites with improved charge separation and photocatalytic activity under visible light irradiation

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Chinese Journal of Catalysis 2020年第1期41卷 170-179页

作者： Bo Chai juntao yan Guozhi Fan Guangsen Song Chunlei Wang Hubei Key Laboratory of Animal Nutrition and Feed Science Wuhan Polytechnic UniversityWuhan 430023HubeiChina School of Chemical and Environmental Engineering Wuhan Polytechnic UniversityWuhan 430023HubeiChina

To further improve the charge separation and photocatalytic activities of g-C3N4 and CdMoO4 under visible light irradiation,CdMoO4/g-C3N4 composites were rationally synthesized by a facile precipitation-calcination *** crystal phases,morphologies,chemical compositions,textural structures,and optical properties of the as-prepared composites were characterized by the corresponding analytical *** photocatalytic activities toward degradation of rhodamine B solution were evaluated under visible light *** results revealed that integrating CdMoO4 with g-C3N4 could remarkably improve the charge separation and photocatalytic activity,compared with those of pristine g-C3N4 and *** would be because the CdMoO4/g-C3N4 composites could facilitate the transfer and separation of the photoexcited electron-hole pairs,which was confirmed by electrochemical impedance spectroscopy,transient photocurrent responses,and photoluminescence ***,active species trapping experiments demonstrated that holes(h+)and superoxide radicals(?O2?)were the main active species during the photocatalytic reaction.A possible photocatalytic mechanism was proposed on the basis of the energy band structures determined by Mott-Schottky *** work would provide further insights into the rational fabrication of composites for organic contaminant removal.

关键词： CdMoO4/g-C3N4 composite Heterojunction Charge separation Visible light Photocatalytic activity

Direct electrospinning method for the construction of Z-scheme TiO_2/g-C_3N_4/RGO ternary heterojunction photocatalysts with remarkably ameliorated photocatalytic performance

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Chinese Journal of Catalysis 2019年第3期40卷 458-469页

作者： Liming Hu juntao yan Chunlei Wang Bo Chai Jianfen Li College of Chemistry and Environmental Engineering Wuhan Polytechnic University Wuhan 430023 Hubei China

A series of Z-scheme TiO2/g-C3N4/RGO ternary heterojunction photocatalysts are successfully constructed via a direct electrospinning technique coupled with an annealing process for the first time. They are investigated comprehensively in terms of crystal structure, morphology, composition, specific surface area, photoelectrochemical properties, photodegradation performance, etc. Compared with binary TiO2/g-C3N4 and single-component photocatalysts, ternary heterojunction photocatalysts show the best photodegradation performance for RhB under stimulated sunlight. This can be attributed to the enlarged specific surface area (111.41 m2/g), the formation of Z-scheme heterojunction, and the high separation migration efficiency of photoexcited charge carriers. A potential Z-scheme mechanism for ternary heterojunction photocatalysts is proposed to elucidate the remarkably ameliorated photocatalytic performance based on active species trapping experiments, PL detection test of hydroxyl radicals, and photoelectrochemical properties.

关键词： Electrospinning Z-scheme TiO2/g-C3N4/RGO Ternary heterojunction Photocatalysis

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人-电动助力车系统结构参数稳定性分析

北京理工大学学报 2022年第5期42卷 485-492页

作者：黄华闫俊涛张军北京理工大学机械与车辆学院北京100081

基于电动助力自行车全局结构参数模型并引入人体质量参数、路面坡度及外部载荷等因素,得到全面且完整的人-车系统动力学方程.利用二阶微分方程特征值来分析人-车系统稳定性并在此基础上划分出人-车系统的5种骑行车速区间.定义了6个系统... 详细信息

基于电动助力自行车全局结构参数模型并引入人体质量参数、路面坡度及外部载荷等因素,得到全面且完整的人-车系统动力学方程.利用二阶微分方程特征值来分析人-车系统稳定性并在此基础上划分出人-车系统的5种骑行车速区间.定义了6个系统稳定性评价指标,以此来分析不同结构参数对系统稳定性的影响程度.引入了量纲一的区域灵敏度指标和区间车速灵敏度指标,来表征结构参数对不同运动模式区域及系统骑行自稳定性的影响,基于相关性分析对区间车速灵敏度指标进行区域分类并对不同结构参数与系统自稳性能的关系进行解释说明.结果表明,系统主要结构参数、人体不同姿态角及不同路面坡度角等参数对系统车速区间及系统自稳性的影响程度有着显著差别,可以使用灵敏度指标来表征系统结构参数对系统稳定性的影响程度,灵敏度参数的大小能够反映系统稳定性的强弱.

关键词：人-车系统自稳定性结构参数稳定性指标灵敏度参数

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上软下硬复合地层盾构隧洞开挖面稳定性研究

隧道建设（中英文） 2020年第2期40卷 223-230,I0003-I0010页

作者：闫军涛胡潇刘波河北工程大学水利水电学院河北邯郸056038 天津大学水利工程仿真与国家安全重点实验室天津300072 河北工程大学土木工程学院河北邯郸056038

为研究上软下硬复合地层盾构隧洞开挖面破坏形式、确定开挖面极限支护力最小值,引入弹性模量比的概念,利用数值模拟技术研究开挖面前方上下土(岩)层弹性模量比对开挖面破坏的影响;对三维梯形楔形体模型进行改进,基于刚体极限平衡原理,... 详细信息

为研究上软下硬复合地层盾构隧洞开挖面破坏形式、确定开挖面极限支护力最小值,引入弹性模量比的概念,利用数值模拟技术研究开挖面前方上下土(岩)层弹性模量比对开挖面破坏的影响;对三维梯形楔形体模型进行改进,基于刚体极限平衡原理,提出考虑孔隙水压力条件下的部分梯形楔形体模型,并将该计算模型应用于实际工程中;对比Terzaghi松动土压力理论和三维松动土压力理论对极限支护力计算结果的影响。结果表明:1)开挖面前方上下土(岩)体弹性模量比对开挖面破坏有一定影响;2)提出的部分梯形楔形体模型计算结果与数值模拟结果吻合较好;3)采用三维松动土压力理论计算盾构隧洞开挖面上覆土压力,和部分梯形楔形体模型计算上软下硬地层盾构隧洞开挖面极限支护力最小值相对可靠。

关键词：盾构隧洞上软下硬地层上覆土压力部分梯形楔形体模型极限支护力

重复经颅磁刺激在孤独症谱系障碍中的应用进展

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中国医学物理学杂志 2021年第5期38卷 643-646页

作者：陈霄严隽陶尹露上海中医药大学附属岳阳中西医结合医院上海200437

孤独症谱系障碍是一种患病率日益增长的神经发育综合征,可出现多种行为障碍。近年来,重复经颅磁刺激在孤独症谱系障碍治疗中取得了一些研究成果,但关于刺激参数选择、安全性及可行性评估方面仍存在一定争议。本文就其关于诱导长时程增强... 详细信息

孤独症谱系障碍是一种患病率日益增长的神经发育综合征,可出现多种行为障碍。近年来,重复经颅磁刺激在孤独症谱系障碍治疗中取得了一些研究成果,但关于刺激参数选择、安全性及可行性评估方面仍存在一定争议。本文就其关于诱导长时程增强/抑制、调节皮质抑制的治疗机制、低频和高频经颅磁刺激的临床应用及目前涉及的安全性、道德伦理问题等局限性进行综述,从而为今后的研究与临床应用提供一定的参考依据。

关键词：孤独症谱系障碍重复经颅磁刺激刺激参数综述

含音乐的丰富环境对慢性温和不可预知应激大鼠抑郁样行为及其海马神经可塑性的影响

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中华物理医学与康复杂志 2024年第12期46卷 1065-1071页

作者：陈霄尹露安云闫慧新严隽陶上海中医药大学附属曙光医院上海上海中医药大学附属岳阳中西医结合医院上海

目的观察含音乐的丰富环境对慢性温和不可预知应激(CUMS)模型大鼠抑郁样行为及其神经可塑性相关蛋白的蛋白激酶A(PKA)、环磷腺苷效应元件结合蛋白(CREB)、磷酸化CREB蛋白(p-CREB)、脑源性神经营养因子(BDNF)表达的影响。方法选取雄性SD... 详细信息

目的观察含音乐的丰富环境对慢性温和不可预知应激(CUMS)模型大鼠抑郁样行为及其神经可塑性相关蛋白的蛋白激酶A(PKA)、环磷腺苷效应元件结合蛋白(CREB)、磷酸化CREB蛋白(p-CREB)、脑源性神经营养因子(BDNF)表达的影响。方法选取雄性SD大鼠40只, 按照随机数字表法将其分为空白组、模型对照组、无音乐丰富环境组和含音乐丰富环境组, 每组大鼠10只。模型对照组、无音乐丰富环境组和含音乐丰富环境组进行CUMS造模。造模成功后, 空白组和模型对照组均于常规鼠笼中接受常规饲养21 d, 无音乐丰富环境组则给予丰富环境干预21 d, 含音乐丰富环境组在普通丰富环境中增加音乐治疗。4组大鼠均于干预21 d后分别进行糖水偏爱实验、旷场实验和强迫游泳实验。行为学检测结束后, 4组大鼠断头取脑, 采用免疫组化法和免疫蛋白印迹法分别检测其海马区PKA、CREB、p-CREB、BDNF蛋白的表达。结果干预21 d后, 模型对照组大鼠的糖水偏爱率、旷场内活动总距离、中心区活动距离、站立次数和游泳不动时间与空白组比较, 差异均有统计学意义(P<0.05);无音乐丰富环境组的糖水偏爱率、旷场内活动总距离、中心区活动距离和游泳不动时间与模型对照组比较, 差异均有统计学意义(P<0.05);含音乐丰富环境组的糖水偏爱率、旷场内活动总距离、站立次数和游泳不动时间与模型对照组比较, 差异均有统计学意义(P<0.05);无音乐丰富环境组的游泳不动时间为(110.94 s±37.56 s), 与含音乐丰富环境组的(66.78 s±46.47 s)比较, 差异有统计学意义(P<0.05)。干预21 d后, 模型对照组大鼠海马区CREB、p-CREB、BDNF蛋白的阳性面积百分比较空白组均显著下降(P<0.05);无音乐丰富环境组和含音乐丰富环境组的CREB、p-CREB、BDNF蛋白的阳性面积百分比与模型对照组比较, 差异均有统计学意义(P<0.05), 且以含音乐丰富环境组更为显著, 与无音乐丰富环境组比较, 差异有统计学意义(P<0.05)。干预21 d后, 模型对照组大鼠海马区PKA、CREB、p-CREB、BDNF的蛋白表达水平与空白组比较, 差异均有统计学意义(P<0.05);无音乐丰富环境组PKA、CREB、p-CREB的蛋白表达水平较模型对照组均明显升高(P<0.05);含音乐丰富环境组PKA、CREB、p-CREB、BDNF蛋白表达水平较模型对照组和无音乐丰富环境组, 均显著升高(P<0.05)。结论丰富环境可显著改善大鼠的抑郁样行为, 而在丰富环境中增加音乐可提高其抗抑郁的疗效, 且丰富环境的抗抑郁机制可能与其可上调PKA、CREB、p-CREB、BDNF蛋白表达水平有关。

关键词：抑郁症 CUMS模型丰富环境音乐神经可塑性海马

ECMO治疗成人重症急性呼吸窘迫综合征的快速卫生技术评估

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中国循证医学杂志 2021年第9期21卷 1075-1081页

作者：樊志磊严俊涛陈英耀复旦大学公共卫生学院上海200032 国家卫生健康委员会卫生技术评估重点实验室上海200032

目的快速评估体外膜肺氧合(extracorporeal membrane oxygenation,ECMO)支持治疗成人急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)患者的安全有效性、经济性和社会适宜性,为医疗卫生相关决策提供当前可得的最佳证据... 详细信息

目的快速评估体外膜肺氧合(extracorporeal membrane oxygenation,ECMO)支持治疗成人急性呼吸窘迫综合征(acute respiratory distress syndrome,ARDS)患者的安全有效性、经济性和社会适宜性,为医疗卫生相关决策提供当前可得的最佳证据。方法计算机检索PubMed、EMbase、The Cochrane Library、CNKI、WanFang Data和CBM数据库,同时检索CRD database、ECLS等相关专业网站,搜集ECMO对比机械通气治疗成人重症ARDS患者的高质量临床证据、经济学评价文献,检索时限均从建库至2020年12月。由2位评价员独立筛选文献、提取资料并评价纳入研究的偏倚风险后,进行描述性分析。结果共纳入21篇文献,其中卫生技术评估报告2篇、随机对照试验(RCT)5个、系统评价或Meta分析文献11篇、成本效果分析文献3篇,证据质量参差不齐。仅纳入文献质量高的2个RCT数据所进行的Meta分析研究,其结果显示ECMO相对于机械通气其60天死亡率差异具有统计学意义[RR=0.73,95%CI(0.57,0.92),P=0.007]。近期Meta分析结果多数支持ECMO治疗相较机械通气患者短期死亡率更低的结论。来自3个国家的成本效果文献均显示其在该国卫生体系下具有成本效果,但文献质量不一。结论当前证据显示,相较于机械通气,ECMO治疗ARDS具有更好的安全有效性与成本效果,但上述结论尚需更多高质量长期随访研究加以验证,且亟需本土化的卫生经济学证据和精细的卫生技术评估流程。

关键词：体外膜肺氧合急性呼吸窘迫综合征快速卫生技术评估