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Construction of hollow mesoporous silica nanoreactors for enhanced photo-oxidations over Au-Pt catalysts

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National Science Review 2020年第11期7卷 1647-1655页

作者： Hao Tian Jinhui Zhao xinyao wang Lizhuo wang Hao Liu Guoxiu wang Jun Huang Jian Liu G.Q.(Max) Lu State Key Laboratory of Catalysis Dalian Institute of Chemical Physics (DICP)Chinese Academy of Sciences Centre for Clean Energy Technology School of Mathematical and Physical SciencesFaculty of ScienceUniversity of Technology Sydney Laboratory for Catalysis Engineering School of Chemical and Biomolecular Engineering Sydney Nano Institute The University of Sydney DICP-Surrey Joint Centre for Future Materials Department of Chemical and Process Engineering and Advanced Technology Institute University of Surrey University of Surrey

It is highly desirable to design hollow structures with multi-scale functions by mimicking cells for the construction of micro/nanoreactors. Herein, we report the construction of hollow-structured submicrometer-photoreactors with bimetallic catalysts loaded within mesoporous silicas. The synthesis parameters are optimized to study the evolution of hollow structure through hydrothermal treatment and an ‘adhesive-contraction’ formation mechanism is proposed. Au Pt@HMZS catalysts exhibited a broader absorbance region under visible light and the adsorption edge displayed a red-shift, indicating the strong metal–metal interactions at the alloy interface. The reaction performance of the coupled Au-Pt catalysts can be tuned to achieve excellent catalytic activity in cinnamyl alcohol oxidation to cinnamic acid for 3.1 mmol g-1with 99%selectivity. The proposed strategy to build hollow structures as multifunctional micro/nanoreactors is promising for the design of high-performance and sustainable catalysts for chemical synthesis.

关键词： nanoreactors photocatalytic oxidation metal nanoparticles mesoporous materials surface plasmonic resonance

Precisely Control Relationship between Sulfur Vacancy and H Absorption for Boosting Hydrogen Evolution Reaction

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Nano-Micro Letters 2024年第4期16卷 14-24页

作者： Jing Jin xinyao wang Yang Hu Zhuang Zhang Hongbo Liu Jie Yin Pinxian Xi College of Chemistry and Chemical Engineering Frontiers Science Center for Rare IsotopesState Key Laboratory of Applied Organic ChemistryLanzhou UniversityLanzhou 730000People’s Republic of China

Ef fective and robust catalyst is the core of water splitting to produce ***, we report an anionic etching method to tailor the sulfur vacancy(VS) of NiS_(2) to further enhance the electrocatalytic performance for hydrogen evolution reaction(HER). With the VS concentration change from 2.4% to 8.5%, the H* adsorption strength on S sites changed and NiS_(2)-VS 5.9% shows the most optimized H* adsorption for HER with an ultralow onset potential(68 m V) and has long-term stability for 100 h in 1 M KOH media. In situ attenuated-total-reflection Fourier transform infrared spectroscopy(ATR-FTIRS) measurements are usually used to monitor the adsorption of intermediates. The S-H* peak of the Ni S_(2)-VS 5.9% appears at a very low voltage, which is favorable for the HER in alkaline media. Density functional theory calculations also demonstrate the Ni S_(2)-VS 5.9% has the optimal |ΔG^(H*)| of 0.17 e V. This work offers a simple and promising pathway to enhance catalytic activity via precise vacancies strategy.

关键词： Hydrogen evolution reaction S vacancies Nanosheet H Adsorption

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Design of mesoporous ZnCoSiOx hollow nanoreactors with specific spatial distribution of metal species for selective CO_(2)hydrogenation

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Nano Research 2023年第4期16卷 5601-5609页

作者： xinyao wang Runping Ye Melis S.Duyar Cameron Alexander Hurd Price Hao Tian Yanping Chen Na Ta Hao Liu Jian Liu State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China Department of Chemical and Process Engineering University of SurreyGuildfordSurrey GU27XHUK Department of Chemical Engineering and Analytical Science University of ManchesterManchesterUK Centre for Clean Energy Technology University of Technology SydneySydneyBroadway NSW 2007Australia DICP-Surrey Joint Centre for Future Materials Advanced Technology InstituteUniversity of SurreyGuildfordSurrey GU27XHUK

In heterogeneous catalysis,the precise placement of active components to perform unique functions in cooperation with each other is a tremendous *** migration of matter on micro/nano-scale caused by diffusion is a promising pathway for design of catalytic nanoreactors with precise active sites location and controllable microenvironment through compartmentalization and confinement ***,we report two categories of mesoporous ZnCoSiOx hollow nanoreactors with different metal distributions and microenvironment engineered by the diffusion behavior of metal species in confined ***-shelled hollow structures with well-distributed metal species were obtained by adopting core@shell structured ZnCo-zeolitic imidazolate framework(ZIF)@SiO2 as a template and employing three stages of hydrothermal treatment including the decomposition of ZIF,diffusion of metal species into the silica shell,and Ostwald ***,the formation of yolk@shell structure with a collective(Zn-Co)metal oxide as the yolk was achieved by direct pyrolysis of ZnCo-ZIF@*** CO_(2)hydrogenation,ZnCoSiOx with double-shelled hollow structures and yolk@shell structures respectively afford CO and CH_(4)as main product,which is related with different dispersion and location of active sites in the two *** study provides an efficient method for the synthesis of catalytic nanoreactors on the basis of insights of the atomic diffusion in confined space at the mesoscale.

关键词： mesoporous materials structure-activity relationships supported catalysts metal-organic frameworks nanostructures

On optimization of cooperative MIMO for underlaid secrecy Industrial Internet of Things

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Frontiers of Information Technology & Electronic Engineering 2023年第2期24卷 259-274页

作者： xinyao wang Xuyan BAO Yuzhen HUANG Zhong ZHENG Zesong FEI School of Information and Electronics Beijing Institute of TechnologyBeijing100081China China Academy of Information and Communications Technology Beijing100191China Academy of Military Sciences of PLA Beijing100091China

In this paper,physical layer security techniques are investigated for cooperative multi-input multi-output(C-MIMO),which operates as an underlaid cognitive radio system that coexists with a primary user(PU).The underlaid secrecy paradigm is enabled by improving the secrecy rate towards the C-MIMO receiver and reducing the interference towards the *** a communication model is especially suitable for implementing Industrial Internet of Things(IIoT)systems in the unlicensed spectrum,which can trade off spectral efficiency and information *** this end,we propose an eigenspace-adaptive precoding(EAP)method and formulate the secrecy rate optimization problem,which is subject to both the single device power constraint and the interference power *** precoder design is enabled by decomposing the original optimization problem into eigenspace selection and power allocation ***,the eigenvectors are adaptively selected by the transmitter according to the channel conditions of the underlaid users and the *** addition,a simplified EAP method is proposed for large-dimensional C-MIMO transmission,exploiting the additional spatial degree of freedom for a low-complexity secrecy precoder *** results show that by transmitting signal and artificial noise in the properly selected eigenspace,C-MIMO can eliminate the secrecy outage and outperforms the fixed eigenspace precoding ***,the proposed simplified EAP method for the large-dimensional C-MIMO can significantly improve the secrecy rate.

关键词： Cognitive radio network Physical layer security Cooperative multi-input multi-output(C-MIMO) Eigenspace-adaptive precoding Difference convex programming

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Chemical composition and biological activity of Houttuynia cordata

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Asian Journal of Traditional Medicines 2024年第4期19卷 223-234页

作者： Yibo wang Yunpeng Yang xinyao wang Wenhan wang Luming Pan Yu Chen School of Life Science and Biopharmaceutics Shenyang Pharmaceutical UniversityShenyang 110016China School of Business Liaoning UniversityShenyang 110136China

Houttuynia cordata is an important traditional Chinese *** is widely used for clearing heat and detoxification,reducing swelling and treating sores,diuresis and *** is also used to treat lung carbuncles,ulcers,hemorrhoids,rectal bleeding,spleen and stomach heat,which are caused by excess heat,heat toxicity,dampness,and disease *** pharmacological experiments have shown that *** has antibacterial,antiviral,immune enhancing,diuretic and other *** article reviews the chemical components and biological activities of *** to provide reference for clinical application.

关键词： Houttuynia cordata chemical composition biological activity

Chemical composition and biological activities of volatile oil isolated from Curcumae rhizoma

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Asian Journal of Traditional Medicines 2023年第6期18卷 280-288页

作者： Wenhan wang Yibo wang Yuntian Xing xinyao wang Guanyi Zhao Yu Chen School of Life Science and Biopharmaceutics Shenyang Pharmaceutical UniversityShenyang 110016China National Health Commission Key Laboratory of Parasitic Disease Control and Prevention Jiangsu Provincial Key Laboratory on Parasite and Vector Control TechnologyJiangsu Provincial Medical Key LaboratoryJiangsu Institute of Parasitic DiseasesWuxi 214064China School of Business Liaoning UniversityShenyang 110136China

Curcumae rhizoma(***),the rhizome of Curcuma Longa L.,Curcuma kwangsiensis *** Curcuma wenyujin *** the ginger family,is a treasure in traditional Chinese *** has the effect of promoting qi and breaking blood,eliminating accumulation and relieving *** the development of modern medicine,the active ingredients and therapeutic mechanism of *** have been gradually *** this paper,the chemical composition and biological activities of volatile oil isolated from *** are reviewed in detail,aiming to provide reference for further utilization of *** volatile oil and provide more effective drug options for clinical treatment.

关键词： Curcumae rhizoma chemical composition biological activity

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基于欠采样的激光测距数字鉴相方法

红外与激光工程 2013年第5期42卷 1330-1337页

作者：王心遥张珂殊中国科学院光电研究院北京100094 中国科学院大学北京100049

欠采样方法为实现全数字化接收、降低激光测距系统复杂性提供了有效途径。针对传统欠采样数字同步解调法引入干扰大的缺点,为提高系统的测量精度,提出了欠采样频域谱分析鉴相法。方法基于Nyquist采样谱分析鉴相思想,通过对欠采样后搬移... 详细信息

欠采样方法为实现全数字化接收、降低激光测距系统复杂性提供了有效途径。针对传统欠采样数字同步解调法引入干扰大的缺点,为提高系统的测量精度,提出了欠采样频域谱分析鉴相法。方法基于Nyquist采样谱分析鉴相思想,通过对欠采样后搬移到低频的频谱成分进行分析获取相位信息实现鉴相,在抵抗干扰方面具有较好的性能。在加入信噪比40 dB、杂散频率、0.1 MHz频率偏移、2次谐波的综合影响因素后的仿真结果表明,在1 MHz测距速率下,欠采样谱分析鉴相法精度为0.13°,调制频率80 MHz时测距精度为0.68 mm,优于传统的欠采样数字同步解调法。因此,欠采样谱分析法更适用于高速、高精度的数字化相位差测量,提出的实现方案具有实际意义。

关键词：激光测距相位测量欠采样 DFT 信噪比

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Chemical constituents and pharmacological effects of Croton crassifolius

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Asian Journal of Traditional Medicines 2024年第2期19卷 99-114页

作者： Luyan Yang Yibo wang xinyao wang Xiaoxia Xu Yunpeng Yang Meng Zhang Yu Chen School of Life Science and Biopharmaceutics Shenyang Pharmaceutical UniversityShenyang 110016China School of Business Liaoning UniversityShenyang 110136China

Croton crassifolius(CC)is a kind of traditional Chinese medicine rich in terpenoids,with among which diterpene species are the *** had biological activities in the treatment of cancer,inflammation,ulcerative colitis,osteoporosis and Alzheimer’s *** study reviews the chemical compositions and pharmacological activities of CC to provide reference for further research.

关键词： Croton crassifolius chemical compositions pharmacological activities

Overexpression of microRNA-135b-5p attenuates acute myocardial infarction injury through its anti-oxidant and anti-apptotic properties

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Frigid Zone Medicine 2021年第2期1卷 85-94页

作者： Yanyan Liu Yahan Yu xinyao wang Guanqun Liu Xinda Yin Yunlong Bai Zhimin Du Zhuhai People's Hospital Guangdong Provincial Key Laboratory of Tumor Interventional Diagnosis and TreatmentZhuhai Hospital Affiliated With Jinan UniversityJinan UniversityZhuhai 519000China Department of Pharmacology(State-Province Key Laboratories of Biomedicine-Pharmaceutics of China Key Laboratory of Cardiovascular Medicine ResearchMinistry of Education)College of PharmacyHarbin Medical UniversityHarbin 150081China Translational Medicine Research and Cooperation Center of Northern China Heilongjiang Academy of Medical SciencesHarbin 150081China Joint International Research Laboratory of Cardiovascular Medicine Ministry of EducationCollege of PharmacyHarbin Medical UniversityHarbin 150081China

Objective:Myocardial infarction(MI)remains the leading cause of morbidity and mortality due partly to the limited regenerative capacity of cardiomyocytes to replace cardiomyocyte lost due to *** cardiomyocyte apoptosis is recognized as an effective therapeutic approach for ***(miRNAs,miRs),which regulate target genes at the post-transcriptional level,play a significant role in the regulation of cardiovascular diseases such as ***-135b(miR-135b)has a protective effect on ***,the role of miR-135b in cardiomyocyte apoptosis in infarct myocardium needs further ***:We generatedα-MHC-miR-135b transgenic mice to investigate the role of miR-135b in myocardial injury after ***-135b mimic and negative control(NC)were transfected into H2O2-induced cardiomyocytes to evaluate the effect of overexpression of miR-135b on the levels of reactive oxygen species(ROS)and ***:Our results showed that overexpression of miR-135b had protective effect on cardiomyocyte injury both in vivo and in ***-135b inhibited cardiomyocyte apoptosis and ROS generation,downregulated pro-apoptosis proteins(cleaved-caspase-3 and Bax),and increased anti-apoptosis protein(Bcl-2).Moreover,miR-135b showed an inhibitory effect on apoptosis-related protein target transient receptor potential vanilloid-type 4(TRPV4)cation ***:MiR-135b might be considered a new molecular target for potential replacement therapy as antiapoptotic cardioprotection in the setting of MI.

关键词： myocardial infarction apoptosis microRNA-135b TRPV4