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Colloidal Synthesis of Semiconductor Films for Efficient Photoelectrochemical Hydrogen Generation

Energy Material Advances 2023年第1期4卷 200-209页

作者： akang chen Xinyuan Li Jiale Wang Jiatao Zhang Beijing Key Laboratory of Construction-Tailorable Advanced Functional Materials and Green Applications Key Laboratory of Medical Molecule Science and Pharmaceutical EngineeringMinistry of Industry and Information TechnologyMOE Key Laboratory of Cluster ScienceSchool of Chemistry and Chemical EngineeringSchool of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081China

The semiconductor-based photoanodes have shown great potential on photoelectrochemical(PEC)hydrogen *** to the pristine semiconductor,photoanodes fabricated with doped semiconductors exhibit modulated bandgap structure and enhanced charge separation efficiency,demonstrating improved optoelectronic *** this work,we develop a colloidal cation exchange(CE)strategy on versatile synthesis of heterovalent doped chalcogenide semiconductor thin films with high surface *** Ag-doped CdSe(CdSe:Ag)thin films as an example,the organized centimeter-scale CdSe:Ag films with nanometer-scale thickness(thickness around 80 nm,length×width around 1.5 cm×1.2 cm)exhibit enhanced optical absorbance ability and charge carrier density by tuning the energy levels of conduction and valence bands as well as improved electrical conductivity by Ag dopants compared to the pristine CdSe film obtained by the vapor-phase vacuum deposition *** the meantime,the surface roughness of the as-prepared semiconductor thin films is also increased with abundantly exposed active sites to facilitate accessibility to water for hydrogen generation and suppress photogenerated carrier *** CdSe:Ag film photoanodes exhibit superb PEC hydrogen generation performance with a photocurrent density of 0.56 mA/cm^(2) at 1.23 V versus reversible hydrogen electrode,which is nearly 3 times higher than the pristine CdSe *** work provides a new strategy on colloidal synthesis of photoelectrodes with modulated heterovalent doping and surface roughness for PEC applications.

关键词： roughness film synthesis

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Electronic structure engineering of single atomic sites by plasmoninduced hot electrons for highly efficient and selective photocatalysis

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Nano Research 2024年第8期17卷 6960-6967页

作者： Xiaoya Huang Xinyuan Li akang chen Hongfei Gu Shouyuan Li Tailei Hou Shuwen Zhu Shuang Yu Yin Song Jiatao Zhang Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory of Medical Molecule Science and Pharmaceutical EngineeringMOE Key Laboratory of Cluster ScienceSchool of Chemistry and Chemical EngineeringSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China MIIT Key Laboratory of Complex-field Intelligent Exploration School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

Single atom(SA)catalysts have achieved great success on highly selective heterogeneous catalysis due to their abundant and homogeneous active *** electronic structures of these active sites,restrained by their localized coordination environments,significantly determine their catalytic performances,which are difficult to ***,we investigated the effect of localized surface plasmon resonance(LSPR)on engineering the electronic structures of single atomic ***,core–shell structures consisted of Au core and transition metal SAs loaded N-doped carbon(CN)shell were constructed,namely Au@M-SA/CN(M=Ni,Fe,and Co).It was demonstrated that plasmon-induced hot electrons originated from Au were directionally injected to the M-SAs under visible light irradiation,which significantly changed their electronic structures and meanwhile facilitated improved overall charge separation *** as-prepared Au@Ni-SA/CN exhibited highly efficient and selective photocatalytic CO_(2) reduction to CO performance,which is 20.8,17.5,and 6.9 times those of Au nanoparticles,Au@CN,and Ni-SA/CN,*** spectroscopy analysis and theoretical calculations confirmed that the plasmon enhanced Ni-SA/CN sites featured increased charge density for efficient intermediate activation,contributing to the superb photocatalytic *** work provides a new insight on plasmon and atomic site engineering for efficient and selective catalysis.

关键词： single atom catalysts plasmon enhancement coupling effect photocatalysis CO_(2) reduction

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Synthesis and Modulation of Low-Dimensional Transition Metal Chalcogenide Materials via Atomic Substitution

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Nano-Micro Letters 2024年第9期16卷 49-94页

作者： Xuan Wang akang chen XinLei Wu Jiatao Zhang Jichen Dong Leining Zhang Key Laboratory of Cluster Science Ministry of Education of ChinaBeijing Key Laboratory of Photoelectronic and Electrophonic Conversion MaterialsSchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China Beijing National Laboratory for Molecular Sciences Key Laboratory of Organic SolidsInstitute of Chemistry Chinese Academy of SciencesBeijing 100190People’s Republic of China

In recent years,low-dimensional transition metal chalcogenide(TMC)materials have garnered growing research attention due to their superior electronic,optical,and catalytic properties compared to their bulk *** controllable synthesis and manipulation of these materials are crucial for tailoring their properties and unlocking their full potential in various *** this context,the atomic substitution method has emerged as a favorable *** involves the replacement of specific atoms within TMC structures with other elements and possesses the capability to regulate the compositions finely,crystal structures,and inherent properties of the resulting *** this review,we present a comprehensive overview on various strategies of atomic substitution employed in the synthesis of zero-dimensional,one-dimensional and two-dimensional TMC *** effects of substituting elements,substitution ratios,and substitution positions on the structures and morphologies of resulting material are *** enhanced electrocatalytic performance and photovoltaic properties of the obtained materials are also provided,emphasizing the role of atomic substitution in achieving these ***,challenges and future prospects in the field of atomic substitution for fabricating low-dimensional TMC materials are summarized.

关键词： Transition metal chalcogenides Atomic substitution Ion exchange Low-dimensional materials Controllable synthesis

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In vivo anti-aging properties on fat diet-induced high fat Drosophila melanogaster of n-butanol extract from Paecilomyces hepiali

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Food Science and Human Wellness 2023年第4期12卷 1204-1211页

作者： akang Dan Yushi chen Yongqi Tian Shaoyun Wang College of Biological Science and Technology Fuzhou UniversityFuzhou 350108China College of Chemical Fuzhou UniversityFuzhou 350108China

The purpose of this study was to explore the potential of the development and application of Paecilomyces hepiali,a fungus with edible and medicinal value,as a foodborne antioxidant and anti-aging *** n-butanol extract(PHE)from rice cultures was selected for anti-aging experiment because of significant free radical scavenging activity in *** vivo,PHE could significantly prolong the mean lifespan,50%survival days,and the maximum lifespan of Drosophila on a high-fat *** is amazing that the mean lifespan increased from 19.1 days to 32.9 days,50%survival days increased from 15.7 days to 34.3 days,and the maximum lifespan extended from 44.7 days to 52.7 days,when the high-fat female Drosophila model was fed with 10μg/mL *** research showed that PHE reduced the accumulation of peroxide products and increased the activity of antioxidant ***,through antioxidant activity tracking,dimerumic acid(compound 1,the IC_(50) value of 3.4μg/mL on DPPH free radicals scavenging activity),4,5-dihydroxy-3-methoxypentanoic acid(compound 2,new compound),and thymidine(compound 3)were isolated from *** is worth mentioning that dimerumic acid,the major antioxidant compound of PHE(content up to 3%),was discovered in *** for the first *** was concluded that PHE showed excellent anti-aging activity at a very low concentration on fat diet-induced high fat Drosophila melanogaster,and dimerumic acid may be its main material *** results indicated that PHE had the potential to be developed as antioxidant and anti-aging agent in the healthcare industry.

关键词： Paecilomyces hepiali Anti-aging Drosophila Dimerumic acid

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Vibration and Noise Optimization of New Asymmetric Modular PMaSynRM

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Chinese Journal of Electrical Engineering 2023年第2期9卷 57-70页

作者： Guohai Liu akang Gao Qian chen Yanxin Mao Gaohong Xu School of Electrical and Information Engineering Jiangsu UniversityZhenjiang 212013China

An optimized structure to weaken the vibration and noise of a new asymmetric permanent magnet-assisted synchronous reluctance motor(PMaSynRM)is *** new asymmetric PMaSynRM has the advantages of a low torque ripple and high fault ***,the asymmetric structure generates an unbalanced magnetic force(UMF),which results in vibration and noise *** this study,the vibration and noise of the motor are analyzed and ***,the radial pressure is analyzed,and an optimized structure is *** electromagnetic performance of the motor before and after optimization is analyzed using the finite element ***,a three-dimensional model is established,and modal analysis is conducted considering the orthotropy of the stator and effective ***,the vibration and noise are simulated and analyzed,and the validity of the analysis results is verified *** analysis results indicate that the optimized motor realizes a reduction in the motor vibration and noise.

关键词： Modular motor asymmetric structure modal analysis vibration and noise analysis unbalanced magnetic force

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Advances in research on chemical constituents and pharmacological effects of Paecilomyces hepiali

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Food Science and Human Wellness 2021年第4期10卷 401-407页

作者： akang Dan Yujia Hu Ruyan chen Xiangyang Lin Yongqi Tian Shaoyun Wang School of Biological Science and Technology Fuzhou UniversityFuzhou 350108China

Paecilomyces hepiali is a fungus with edible and pharmaceutic value,isolated from Ophiocordyceps *** main bioactive constituents contain alkaloids,cyclic dipeptides,steroids,organic acids,and *** to the huge development potential of *** in the field of food and medicine,it has been developed into a variety of products that cater to the needs of the *** this paper,the chemical constituents and their pharmacological effects of *** are reviewed,which can provide reference for the development and application of ***.

关键词： Paecilomyces hepiali Chemical constituents Pharmacological effects

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基于UPLC-QE-MS对关中奶山羊泌乳盛期和泌乳末期生乳差异的分析

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食品科学 2024年第10期45卷 186-193页

作者：余梦琦袁宇欣陈璐沙日阿康任新阳屈颖新李广西北农林科技大学动物科技学院陕西杨凌712100

为探究山羊乳中代谢物以及代谢物在不同泌乳期的动态变化和阶段差异性,采用超高效液相色谱-四极杆静电场轨道阱质谱法比较关中奶山羊泌乳盛期和泌乳末期生乳中的差异代谢产物。对表征的代谢物以P1.00、差异倍数(foldchange,FC)>2或FC<0.... 详细信息

为探究山羊乳中代谢物以及代谢物在不同泌乳期的动态变化和阶段差异性,采用超高效液相色谱-四极杆静电场轨道阱质谱法比较关中奶山羊泌乳盛期和泌乳末期生乳中的差异代谢产物。对表征的代谢物以P1.00、差异倍数(foldchange,FC)>2或FC<0.5为筛选标准,共筛选出90种差异代谢物。与泌乳末期相比,泌乳盛期的山羊乳中有50种差异代谢物上调,40种下调。代谢途径分析表明,这些差异代谢物与次级胆汁酸生物合成显著相关。根据VIP值,尿苷二磷酸-N-乙酰基葡糖胺、磷脂酰乙醇胺(12:0/22:2(13Z,16Z))可考虑作为关中奶山羊两个时期差异变化的潜在生物标志物,但还待进一步的研究验证。

关键词：山羊乳泌乳盛期泌乳末期代谢组学

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应用高斯聚类的单木分割及树高和冠幅的提取

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东北林业大学学报 2021年第2期49卷 54-59页

作者：张怡卓吕阿康蒋大鹏陈金浩王克奇东北林业大学哈尔滨150040

针对机载激光雷达点云中基于栅格化的冠层高度模型(CHM)所导致的原始点云数据丢失问题,提出了一种应用高斯模型聚类的单木信息提取方法。采用形态学开运算和高斯平滑方法形成高斯冠层最大模型(GCMM)能减少无关局部最大值对单木分割的影... 详细信息

针对机载激光雷达点云中基于栅格化的冠层高度模型(CHM)所导致的原始点云数据丢失问题,提出了一种应用高斯模型聚类的单木信息提取方法。采用形态学开运算和高斯平滑方法形成高斯冠层最大模型(GCMM)能减少无关局部最大值对单木分割的影响,利用局部最大值法初步探测树冠顶点,通过最速下降法建立混合高斯模型得到树木位置和冠幅。利用聚类分析划分临近点云归属,进而实现单木参数准确提取,并提取单木最高点为树高。将点云分割方法应用于美国蓝岭地区6块圆形针叶林样地(r=30 m)。结果表明:单木分割F为0.89,正确分割单木树高提取精度95%,冠幅提取精度91%。结合实测数据对提取到的树高和冠幅进行相关性分析,树高R2=0.92,平均误差为-0.83 m;冠幅R2=0.84,平均误差为-0.42 m。相比于分水岭算法,高斯模型聚类方法F提高了11.2%,正确分割单木树高及冠幅提取精度提高了5.5%、5.8%,树高R2提高0.08,平均误差减少0.58 m;冠幅R2提高0.11,平均误差减少0.63 m。

关键词：机载激光雷达高斯模型聚类三维单木树高冠幅

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神经肌肉本体感觉促进技术联合肌内效贴对脑卒中患者上肢运动功能的影响

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康复学报 2023年第2期33卷 121-126页

作者：徐雪迪赵凯陈岩张阿康高晓平陈和木安徽医科大学第一附属医院安徽合肥230022 山东体育学院山东济南250102 安徽医科大学安徽合肥230032

目的:观察神经肌肉本体感觉促进(PNF)技术联合肌内效贴对脑卒中患者上肢运动功能的影响。方法:选择2021年1月—2022年1月在安徽医科大学第一附属医院康复医学科住院的脑卒中患者67例,采用随机数字表法分为对照组、PNF组和联合组,每组分... 详细信息

目的:观察神经肌肉本体感觉促进(PNF)技术联合肌内效贴对脑卒中患者上肢运动功能的影响。方法:选择2021年1月—2022年1月在安徽医科大学第一附属医院康复医学科住院的脑卒中患者67例,采用随机数字表法分为对照组、PNF组和联合组,每组分别22、22、23例,治疗过程中分别有2、2、3例患者脱落/中止,最终每组纳入20例。对照组接受常规物理因子治疗(20 min/次,2次/d,6 d/周)、偏瘫肢体综合训练(40 min/次,1次/d,5 d/周)和作业治疗(20 min/次,1次/d,5 d/周),持续治疗4周;PNF组在对照组基础上进行上肢PNF训练,其中偏瘫肢体综合训练20 min/次,PNF训练20 min/次,1次/d,5 d/周,持续治疗4周;联合组在PNF组基础上接受肌内效贴治疗,贴布每3 d更换1次,持续治疗4周。分别在治疗前、治疗4周后采用Fugl-Meyer运动功能评估量表(FMA)评估上肢运动功能;采用改良Ashworth分级量表(MAS)评估肌张力;采用表面肌电(sEMG)评估积分肌电值(iEMG)和协同收缩率(CR)。结果:①上肢运动功能:与治疗前比较,PNF组及联合组治疗后FMA评分均明显提高,差异具有统计学意义(P0.05);与对照组比较,PNF组及联合组治疗后MAS评分差异均无统计学意义(P>0.05)。③表面肌电图:与治疗前比较,对照组治疗后CR明显降低(P<0.05);PNF组和联合组治疗后iEMG值、CR均明显降低,差异具有统计学意义(P<0.05)。与对照组比较,PNF组治疗后CR明显降低(P<0.05);联合组治疗后iEMG值、CR均明显降低,差异具有统计学意义(P<0.05)。与PNF组比较,联合组治疗后iEMG值明显降低,差异具有统计学意义(P<0.05)。结论:PNF技术联合肌内效贴可有效改善脑卒中患者上肢运动功能及上肢肌电信号传导,值得临床推广应用。

关键词：脑卒中上肢运动功能障碍神经肌肉本体感觉促进技术肌内效贴痉挛运动功能表面肌电

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克罗恩病误诊为动脉肌纤维发育不良一例

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中华炎性肠病杂志（中英文） 2023年第1期7卷 93-96页

作者：邵阿康陈琰琰方亮吴继雄徐国斌丁召黄梅芳赵秋肖书渊陈敏武汉大学中南医院消化内科武汉430071 武汉大学病理中心武汉430071 武汉大学中南医院病理科武汉430071 黄冈市中心医院消化内科武汉430071 武汉大学中南医院影像科武汉430071 武汉大学中南医院结直肠肛门外科武汉430071

克罗恩病(CD)合并血管病变时与单纯的血管病变很难鉴别,临床易误诊。现报道1例合并血管病变的CD误诊为动脉肌纤维发育不良的病例,以提高临床医生对两种疾病的认识。

关键词：克罗恩病血管病变动脉肌纤维发育不良误诊

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