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Particuology 2024年第1期84卷 45-52页

作者： Le-Le zhang Lei Tong Yanwei Ding wanqun zhang Hai-Wei Liang Hefei National Research Center for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei230026China

Hierarchically porous carbons(HPCs)with multimodal pores have attracted considerable attention due to their unique physical and chemical properties and various application potentials in heterogeneous catalysis,environmental treatment,and energy storage and conversion.Herein,we report a general and simple zinc salts-assisted method for the synthesis of HPCs with varied porosity and chemical func-tionalities by the direct carbonization of diverse biomass and wastes.During the carbonization,zinc salts are thermally decomposed into nanoparticles that serve as in-situ templates to introduce nanopores in carbons.The prepared HPCs exhibit high specific surface areas(up to 2432 m2 g-1),large pore volumes(up to 4.30 cm^(3)g^(-1)),and broad pore size distributions.Moreover,the zinc salts can be recovered and recycled,supporting the sustainable production of HPCs on large scale.The prepared HPCs-supported catalysts with atomically dispersed metal sites exhibit promising electrocatalytic performance for the oxygen reduction reaction.

关键词： Hierarchical porous carbon Zinc salts Biomass Wastes Electrocatalysis

Alloy strategy to synthesize Pt-early transition metal oxide interfacial catalysts

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Nano Research 2024年第4期17卷 3390-3397页

作者： Shi-Long Xu Hang Nan wanqun zhang Yue Lin Sheng-Qi Chu Hai-Wei Liang Hefei National Research Center for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230601China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Metal oxide supported metal catalysts show promising catalytic performance in many industry-relevant reactions.However,the enhancement of performance is often limited by the insufficient metal/metal oxide interface.In this work,we demonstrate a general synthesis of Pt-early transition metal oxide(Pt-MO_(x),M=Ti,Zr,V,and Y)catalysts with rich interfacial sites,which is based on the air-induced surface segregation and oxidation of M in the supported Pt-M alloy catalysts.Systematic characterizations verify the dynamic structural response of Pt-M alloy catalysts to air and the formation of Pt-MO_(x) catalysts with abundant interfacial sites.The prepared Pt-TiO_(x) interfacial catalysts exhibit improved performance in hydrogenation reactions of benzaldehyde,nitrobenzene,styrene,and furfural,as a result of the heterolytic dissociation of H_(2) at Pt-metal oxide interfacial sites.

关键词： Pt-early transition metal oxide interfacial catalyst alloy oxidation strategy interfacial sites hydrogenation reactions heterolytic dissociation

Iridium-Doped 10H-Phase Perovskite BaCo_(0.8)Fe_(0.15)Ir_(0.05)O_(3-δ)as an Efficient Oxygen Evolution Reaction Catalyst

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Chinese Journal of Chemistry 2022年第19期40卷 2276-2284页

作者： Huimin Liu Qinxin Luo Jiaping Hu Lianwei Wei wanqun zhang Hui Zheng Shusheng Wu Kaibin Tang Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefeiAnhui230026 China Department of Chemistry University of Science and Technology of ChinaHefeiAnhui230026 China Department of Chemistry City University of Hong KongHong KongChina Chemistry Experiment Teaching Center University of Science and Technology of ChinaHefeiAnhui230026 China

Designing low-cost and high-performance catalysts of electrocatalytic oxygen evolution reaction(OER)has always been one of the hot topics in current research.Hexagonal perovskite materials show great application potential in this field.Here,we synthesized 5%Iridium(Ir)-doped hexagonal phase perovskite BaCo_(0.8)Fe_(0.15)Ir_(0.05)O_(3–δ)(BCFI).Using the Rietveld method to refine the structure,combining with the spherical aberration corrected high-angle annular dark-field scanning transmission electron microscopy(HAADF-STEM)atomic imaging,we found that BCFI is a ten-layer hexagonal(10H)structure,which belongs to the Purn:x-wiley:1001604X:media:cjoc202200200:cjoc202200200-math-0001m2 space group.In addition,BCFI shows excellent OER catalytic effect and good stability in 1 mol/L KOH solution,and the overpotential reaches 294 mV at a current density of 10 mA cm^(–2).The reduction of Cobalt(Co)valence state induced by Ir doping significantly enhances the OER activity of BCFI.Meanwhile,density functional theory(DFT)calculations show that the 2p-band center of oxygen(O)in BCFI is closer to the Fermi level than that in undoped BaCo_(0.8)Fe_(0.15)Ir_(0.05)O_(3–δ)(BCF),which is beneficial to the OER.This work reveals a novel 10H-BCFI material with excellent OER performance,and provides a basis for the design of hexagonal perovskite materials in OER and other energy conversion fields.

关键词： Electrochemistry Perovskite phases Oxygen evolution reaction Cobalt Iridium

Revealing Quasi-1D Volume Expansion in Na-/K-Ion Battery Anodes:A Case Study of Sb_(2)O_(3)Microbelts

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CCS Chemistry 2021年第5期3卷 1306-1315页

作者： Zheng Yi Daliang Fang wanqun zhang Jie Tian Shimou Chen Jianbo Liang Ning Lin Yitai Qian Department of Applied Chemistry Hefei National Laboratory for Physical Science at MicroscaleUniversity of Science and Technology of ChinaHefei 230026 Beijing Key Laboratory of Ionic Liquid Clean Process CAS Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190 Chemistry Experiment Teaching Center University of Science and Technology of ChinaAnhuli 230026 Experimental Center of Engineering and Material Science University of Science and Technology of ChinaHefei 230026 Department of Chemistry Capital Normal UniversityBeijing 100048

Tailoring a rational structure to control the huge volume variation is practical in regulating alkali-ion battery performance on the basis of the anisotropic properties of crystallized anode materials.Here,a double-serrated orthorhombic antimony oxide(Sb_(2)O_(3))microbelt was prepared by a thermally induced recrystallization/sublimation process.In situ transmission electron microscopy(TEM),in situ X-ray powder diffraction(XRD),and ex situ scanning electron microscopy(SEM)measurements demonstrate that Sb_(2)O_(3)microbelts exhibit a quasi-one-dimensional expansion perpendicular to the belt(along the[100]direction)during sodiation.The unconstrained microbelt surface space can appropriately accommodate the oriented volume variation.Thus,Sb_(2)O_(3)microbelts exhibit enhanced cycling and rate performance in half-cell sodium-ion batteries samples.Via support of reduced graphene oxide(RGO),Sb_(2)O_(3)@RGOcomposites deliver good rate capability(312.3 mAh g−1 at 3 A g−1)for sodium-ion full-cell batteries and good cycling performance(473.9 mAh g−1 at 100 mA g−1 after 100 cycles)for half-cell potassium-ion batteries.In situ Raman measurements reveal that the conversion/alloying-type Sb_(2)O_(3)anode undergoes a fully reversible alloying reaction and partially reversible conversion mechanism,which explains its irreversible capacity during the first cycle.The delicate structural design and clarification of the alkali-ion storage mechanisms facilitate the development of Sb_(2)O_(3)anodes for energy storage applications.

关键词： anisotropic volume expansion microbelts Sb_(2)O_(3) sodium-ion batteries in situ characterizations

基于解痉多肽表达化生病证结合的小鼠模型探讨胃癌前病变脾胃虚实证候的本质

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辽宁中医杂志 2024年第3期51卷 195-199,I0008,I0009页

作者：陈万群田锋亮李延萍张金卫杨小军重庆市中医院重庆400000

目的为了构建病证结合的小鼠模型及进行胃癌前病变(gastric precancerous lesions,GPL)脾胃虚实证候的本质研究。方法采用他莫昔芬(tamoxifen,TMXFR)诱导构建解痉多肽表达化生(spasmolytic peptide expression metagenesis,SPEM)小鼠模型,并在SPEM模型基础上分别模拟构建脾胃湿热证、脾气虚证模型,结合TMXFR诱导的SPEM模型具有自恢复的特性,以TMXFR组及生理盐水处理组作为对照组,监测小鼠一般情况,HE染色检测SPEM模型的构建及恢复情况,ELISA检测小鼠血清胃泌素水平,PCR检测各组小鼠胃黏膜中miR-7a-5p含量,免疫组化检测各组小鼠胃黏膜中白细胞介素-1β(interleukin-1β,IL-1β)、白细胞介素-13(interleukin-13,IL-13)表达。结果病证结合的脾胃湿热证、脾气虚证组较TMXFR组、SPEM组织恢复明显延迟;脾胃湿热证较对照组及TMXFR组的胃泌素表达异常升高(P<0.05),SPEM模型组小鼠胃黏膜中miR-7a-5p较对照组水平降低(P<0.05),病证结合的脾胃虚实组miR-7a-5p表达较TMXFR有下降趋势;病证结合的脾胃虚实组IL-1β表达较TMXFR组、对照组升高(P<0.05),脾胃湿热证、脾气虚证组中IL-13表达有升高趋。结论此项研究结果侧面证实了在癌前病灶已形成的前提下,虽无幽门螺杆菌感染,在外感湿热之邪、进食肥甘厚腻、饥饱失常、过劳伤脾等诱因下,机体可突破自身代偿修复能力,延缓SPEM恢复甚至使GPL进一步进展。这可能跟miR-7a-5p介导炎症因子IL-1β使得Th1/Th2细胞失衡相关,但具体机制尚待进一步研究。

关键词：解痉多肽表达化生胃癌前病变脾胃湿热证脾气虚证病证结合动物模型

仪器分析实验课程思政案例设计与实践——以气质联用实验为例

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大学化学 2024年第2期39卷 147-154页

作者：邵伟张万群朱平平胡万群周强李维维杨凯平王细胜化学国家级实验教学示范中心(中国科学技术大学) 合肥230026 中国科学技术大学化学与材料科学学院合肥230026

中国科学技术大学化学国家级实验教学中心所开设的“仪器分析实验”为安徽省课程思政示范课程,在实验项目“气质联用法测定饮料中塑化剂含量”的教学过程中,课程组针对课程的特点和教学过程,对该项目进行思政示范教学案例设计。思政案... 详细信息

中国科学技术大学化学国家级实验教学中心所开设的“仪器分析实验”为安徽省课程思政示范课程,在实验项目“气质联用法测定饮料中塑化剂含量”的教学过程中,课程组针对课程的特点和教学过程,对该项目进行思政示范教学案例设计。思政案例库的建设,有助于教师充分挖掘专业课程中的德育元素,激发学生的学习兴趣,培养学生的自主创新意识,取得了良好的教学效果。

关键词：课程思政思政案例仪器分析质谱诺贝尔奖塑化剂食品安全

仪器分析实验课程思政案例设计与实践——以青蒿素的提取与结构鉴定的探究实验为例

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大学化学 2024年第2期39卷 203-207页

作者：胡万群朱平平郑媛张万群邵伟吴红周强杨凯平盛翔化学国家级实验教学示范中心(中国科学技术大学) 合肥230026

中医药文化被喻为中华优秀传统文化的璀璨明珠,是中华传统文化的重要组成和典型代表。而作为抗疟明星的中医药青蒿素来源于天然产物,因此,天然产物中的青蒿素的提取和结构鉴定显得十分必要。课程团队结合课程特点,将青蒿素的提取和结构... 详细信息

中医药文化被喻为中华优秀传统文化的璀璨明珠,是中华传统文化的重要组成和典型代表。而作为抗疟明星的中医药青蒿素来源于天然产物,因此,天然产物中的青蒿素的提取和结构鉴定显得十分必要。课程团队结合课程特点,将青蒿素的提取和结构鉴定引入实验教学并进行课程思政教学案例设计。以此项目为载体,培养学生自主查阅文献、设计实验方案和运用仪器分析技术表征分子结构的科学素养。该教学案例的建立实施有助于教师充分挖掘课程中的思政元素,激发学生的学习兴趣,培养其自主创新意识,增强爱国情怀和民族文化自信,取得了良好的课程思政教学示范效果。

关键词：仪器分析教学案例青蒿素诺贝尔奖课程思政

宏基因二代测序对颅内动脉瘤患者术后颅内感染病原微生物的诊断价值及相关因素分析

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中国实用神经疾病杂志 2024年第1期27卷 70-74页

作者：李辉李万群张璐王欣丽韩敬哲哈励逊国际和平医院河北衡水053000

目的分析宏基因二代测序(mNGS)对颅内动脉瘤患者术后颅内感染病原微生物的诊断价值及影响因素。方法选取2021-01—2022-12哈励逊国际和平医院收治的60例颅内动脉瘤术后颅内感染患者为感染组,进行m NGS检测及细菌培养,比较两者对术后颅... 详细信息

目的分析宏基因二代测序(mNGS)对颅内动脉瘤患者术后颅内感染病原微生物的诊断价值及影响因素。方法选取2021-01—2022-12哈励逊国际和平医院收治的60例颅内动脉瘤术后颅内感染患者为感染组,进行m NGS检测及细菌培养,比较两者对术后颅内感染病原微生物的检出率。纳入同期颅内动脉瘤术后未发生颅内感染患者63例为非感染组,收集一般资料,采用Logistic回归分析影响颅内动脉瘤患者术后颅内感染的因素,建立预测模型,绘制ROC曲线评估模型的预测效果。结果60例颅内动脉瘤术后颅内感染患者中mNGS检出病原微生物患者50例,检出率83.00%;细菌培养检出病原微生物患者36例,检出率60.00%,mNGS对病原微生物患者的检出率高于细菌培养(P<0.05)。Logistic多因素回归分析显示,糖尿病、手术时间≥4 h、术中出血量≥100 mL、动脉瘤破裂、脑脊液漏、置管时间≥7 d及术后未使用抗菌药物是颅内动脉瘤术后颅内感染的影响因素(P<0.05)。ROC曲线指标Prob的灵敏度84.00%,特异度67.00%,曲线下面积(AUC)为0.820。结论mNGS对颅内动脉瘤患者术后颅内感染病原微生物的诊断价值较高,糖尿病、手术时间、术中出血量、动脉瘤破裂、脑脊液漏、置管时间及术后使用抗菌药物与颅内动脉瘤术后颅内感染有关,以上述因素构建的预测模型对颅内感染的预测有指导作用。

关键词：颅内动脉瘤颅内感染宏基因二代测序诊断价值危险因素

Integrated Simulation Method for Interaction between Manufacturing Process and Machine Tool

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Chinese Journal of Mechanical Engineering 2016年第6期29卷 1090-1095页

作者： CHEN wanqun HUO Dehong XIE Wenkun TENG Xiangyu zhang Jiayi School of Mechanical and Systems Engineering Newcastle University Center for Precision Engineering Harbin Institute of Technology

The interaction between the machining process and the machine tool （IMPMT） plays an important role on high precision components manufacturing. However, most researches are focused on the machining process or the machine tool separately, and the interaction between them has been always overlooked. In this paper, a novel simplified method is proposed to realize the simulation of IMPMT by combining use the finite element method and state space method. In this method, the transfer function of the machine tool is built as a small state space. The small state space is obtained from the complicated finite element model of the whole machine tool. Furthermore, the control system of the machine tool is integrated with the transfer function of the machine tool to generate the cutting trajectory. Then, the tool tip response under the cutting force is used to predict the machined surface. Finally, a case study is carried out for a fly-cutting machining process, the dynamic response analysis of an ultra-precision fly-cutting machine tool and the machined surface verifies the effectiveness of this method. This research proposes a simplified method to study the IMPMT, the relationships between the machining process and the machine tool are established and the surface generation is obtained.

关键词： dynamic analysis state space surface generation machining interaction precision machining

Interleukin-12 and interferon-γacting on damp-heat of spleen-stomach syndrome triggered by helicobacter pylori

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Journal of Traditional Chinese Medicine 2017年第6期37卷 827-834页

作者： Chen wanqun Hu Ling Li Heyuan Luo Qi Fan Dongmei zhang Yunzhan Institute of Gastroenterology Guangzhou University of Chinese MedicineGuangzhou 510405China Department of Gastroenterology Chongqing Hospital of Traditional Chinese MedicineChongqing 400037China Institute of Gastroenterology Guangzhou University of Chinese MedicineGuangzhou 510405China Institute of Gastroenterology GuangzhouUniversity of Chinese MedicineGuangzhou 510405ChinaDigestive Departmentthe First Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhou 510405China

OBJECTIVE: To investigate the expression of and interleukin-12(IL-12) and interferon-γ(IFN-γ) in relation to the pathology of damp-heat of spleen-stomach syndrome(DHSS) induced by Helicobacter pylori(H. pylori) infection.METHODS: In total, 114 individual gastric mucosal specimens including 83 DHSS, 19 spleen-qi deficiency syndrome(SQD) and 12 from healthy volunteers(CON) were collected by gastroscopy. To explore the relationship between the two syndromes and H. pylori infection, individual samples were tested using rapid urease and methylene blue tests. Hematoxylin and eosin stained sections were examined to grade for the degree of inflammation and inflammatory activity, and expression of IL-12 and IFN-γ was investigated by immunohistochemistry.RESULTS: Statistically significant differences in the degree of inflammation and inflammatory activity were observed between the groups of specimens:DHSS, SQD and CON(P 0.05) groups. Intriguingly, in gastric specimens exhibiting IM and dysplasia, IL-12 translocated from the nucleus into the cytoplasm.CONCLUSION: Our findings suggest that IL-12 and IFN-γ are involved in DHSS pathology, but not in SQD, acting as healthy-Qi. DHSS is not just the consequence of those two cytokines but results from the cross-talk between a number of cytokines and/or other proteins, which may warrant further investigation in DHSS patients infected with H. pylori.

关键词： Helicobacterterferon-gamma SpleenSpleen Qi deficiencypylori Interleukin-12 In-stomach dampness heat