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Controlled synthesis of MOF-derived hollow and yolk–shell nanocages for improved water oxidation and selective ethylene glycol reformation

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eScience 2023年第5期3卷 69-76页

作者： Minghong Huang Changsheng Cao Li Liu Wenbo Wei qi-long Zhu Zhenguo Huang School of Civil&Environmental Engineering University of Technology SydneyUltimoNew South Wales 2007Australia State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of Sciences(CAS)Fuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108China

Delicately designed metal–organic framework(MOF)-derived nanostructured electrocatalysts are essential for improving the reaction kinetics of the oxygen evolution reaction and tuning the selectivity of small organic molecule oxidation ***,novel oxalate-modified hollow CoFe-based layered double hydroxide nanocages(h-CoFe-LDH NCs)and yolk–shell ZIF@CoFe-LDH nanocages(ys-ZIF@CoFe-LDH NCs)are developed through an etching–doping reconstruction strategy from a Co-based MOF precursor(ZIF-67).The distinctive nanostructures,along with the incorporation of the secondary metal element and intercalated oxalate groups,enable h-CoFe-LDH NCs and ys-ZIF@CoFe-LDH NCs to expose more active sites with high intrinsic *** resultant h-CoFe-LDH NCs exhibit outstanding OER activity with an overpotential of only 278 mV to deliver a current density of 50 mA cm^(-2).Additionally,controlling the reconstruction degree enables the formation of ys-ZIF@CoFe-LDH NCs with a yolk–shell nanocage nanostructure,which show outstanding electrocatalytic performance for the selective ethylene glycol oxidation reaction(EGOR)toward formate,with a Faradaic efficiency of up to 91%.Consequently,a hybrid water electrolysis system integrating the EGOR and the hydrogen evolution reaction using Pt/C||ys-ZIF@CoFe-LDH NCs is explored for energy-saving hydrogen production,requiring a cell voltage 127 mV lower than water electrolysis to achieve a current density of 50 mA cm^(-2).This work demonstrates a feasible way to design advanced MOF-derived electrocatalysts toward enhanced electrocatalytic reactions.

关键词： Metal-organic frameworks LDH nanocages Yolk-shell structure Oxygen evolution Ethylene glycol oxidation

Studies on the Electrochemical Behavior of Bleomycin at a Co/GC Ion Implantation Modified Electrode and Its Application

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Chemical Research in Chinese Universities 2001年第4期17卷 362-367页

作者： HU Jing-bo LI qi-long Department of Chemistry Beijing Normal UniversityBeijing 100875P.R.China

In a 0. 10 mol/L HAc-NaAc buffer solution (pH = 4. 59), a sensitive reduction peak of bleomycin was observed by linear sweep voltammetry at a Co/GC ion implantation modified electrode. The peak potential was-0. 73 V(iw. SCE). The peak current was proportional to the concentration of bleomycin over the range of 5.0 × 10-8-1.0× 10-6 and 1.0× 10-6-1. 0 × 10-5 mol/L with a detection limit of 2.0 × 10-8 mol/L. The electrochemical behavior of the reduction peak of bleomycin at the Co/GC modified electrode was studied by linear sweep and cyclic voltammetry and applied to the determination of bleomycin in urine. This method is simple, rapid and reliable. The reduction process is quasi-reversible. The experiments of AES and XPS showed that Co was surely implanted into the surface of GCE and the depth distribution of Co was in good agreement with Gooses normal distribution; the implanted Co at GCE improved the electrocatalytic activity.

关键词： Co/GC ion implantation modified electrode Electrochemical behavior Linear sweep voltammetry Bleomycin

环境友好型害虫诱捕器对茶园主要刺吸式害虫的诱捕效果

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湖北农业科学 2024年第6期63卷 81-85页

作者：李隆琦李远川李一璇刘琦侯如燕杨云秋黄衍章安徽农业大学植物保护学院合肥230036 茶树生物学与资源利用国家重点实验室合肥230036

利用自制环境友好型简易害虫诱捕器,研究不同颜色组合粘虫板对皖南茶园主要刺吸式害虫的诱捕效果及其环境安全性。结果表明,5种颜色组合以金黄-橘红色和金黄-正红色对茶园刺吸式害虫的诱捕效果相对较好,其诱集数量分别为105.6头/盏和10... 详细信息

利用自制环境友好型简易害虫诱捕器,研究不同颜色组合粘虫板对皖南茶园主要刺吸式害虫的诱捕效果及其环境安全性。结果表明,5种颜色组合以金黄-橘红色和金黄-正红色对茶园刺吸式害虫的诱捕效果相对较好,其诱集数量分别为105.6头/盏和102.4头/盏。以金黄-橘红色、土黄-正红色和橙黄-正红色对益虫的诱集数量较小,分别为16.2、19.4、17.4头/盏,诱集益害比分别为0.15、0.20和0.18,且金黄-橘红色组合粘虫板诱捕的昆虫多样性指数最低(1.767),对茶园生态环境较为友好。利用金黄-橘红色和金黄色粘虫板按495盏/hm~2连续诱捕105 d,对茶园小绿叶蝉的防治效果分别为57.14%和42.86%。

关键词：环境友好型害虫诱捕器茶树刺吸式害虫诱捕效果益害比

全可视下脊柱内镜技术治疗重度胸椎黄韧带骨化症

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颈腰痛杂志 2024年第2期45卷 268-270页

作者：郑科倪志豪董洲祁家龙韩国嵩单涛曾宪琦王善松合肥市第一人民医院脊柱外科安徽合肥230061

目的探讨全可视下脊柱内镜技术治疗重度胸椎黄韧带骨化症的临床疗效分析。方法2018年1月~2022年12月,应用全可视脊柱内镜技术治疗例重度胸椎黄韧带骨化症患者共16例,男11例、女5例,年龄39~73岁、平均54.5岁;病程4~37个月、平均18.5个月... 详细信息

目的探讨全可视下脊柱内镜技术治疗重度胸椎黄韧带骨化症的临床疗效分析。方法2018年1月~2022年12月,应用全可视脊柱内镜技术治疗例重度胸椎黄韧带骨化症患者共16例,男11例、女5例,年龄39~73岁、平均54.5岁;病程4~37个月、平均18.5个月,随访8~36个月。结果患者术前、术后1个月、6个月和末次随访时的胸背痛及下肢痛视觉模拟评分(visual analogue scale,VAS)分别为(7.06±0.85)分、(2.88±0.62)分、(1.81±0.54)分、(1.25±0.45)分,术后各时间段的VAS评分均显著低于术前,差异有统计学意义(P<0.01)。患者术前、3个月和6个月末次随访JOA评分分别为(12.43±1.26)分、(20.69±1.62)分、(23.62±1.20)分、(26.25±1.07)分,术后各时间段的JOA评分均显著优于术前,差异有统计学意义(P<0.01)。患者术前、术后3个月和6个月和末次随访时的Oswestry功能障碍指数(Oswestry disability index,ODI)分别为(68.9±3.3)%、(30.9±2.5)%、(19.0±3.0)%、(13.1±2.9)%。术后1个月、6个月及末次随访时均较术前明显改善(P<0.05)。结论全可视下脊柱内镜技术治疗重度胸椎黄韧带骨化症安全性高、术后恢复快、疗效明确。

关键词：黄韧带骨化脊柱内镜胸椎

Solubility Product for CuS and Cu_2S in Iron

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Journal of Iron and Steel Research International 2010年第8期17卷 36-38页

作者： qi Hai-quan YONG qi-long Kunming University of Science and Technology Kunming 650093YunnanChina Central Iron and Steel Research Institute Beijing 100081China

The solubility product formulae of CuS and Cu2S in ferrite and in austenite have been obtained via thermodynamic method,according to the formation energy of CuS and Cu2S and the solubility formulae of elements Cu and S in ferrite and in *** comparing the solubility products for CuS and Cu2S in iron,it is found that Cu2S instead of CuS should be precipitated in iron due to competitative precipitation,in the view of *** formulae of CuS and Cu2S deduced from thermodynamic method would play an important role in related theoretical research and practical production.

关键词： CuS Cu2S solubility product ferrite austenite

Impact Sensitivity in Respect of the Crystal Lattice Free Volume and the Characteristics of Plasticity of Some Nitramine Explosives

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含能材料 2015年第12期23卷 1186-1191页

作者： Svatopluk Zeman Marcela JUNGOV qi-long YAN Institute of Energetic Materials Faculty of Chemical TechnologyUniversity of Pardubice

The relationship between the crystal lattice free volume,ΔV,and impact sensitivity,E_(dr),of ten nitramines has been analyzed. It was found that this relationship is not uniquely determined,i. e. it is not given only by their own ΔV values but fundamentally by the type and intensity of the intermolecular forces in the nitramine crystals. Also,relationships between the E_(dr)values,on the one hand,and bulk modulus,K,and shear modulus,G,on the other,have been the subject of discussion not only for pure cyclic nitramines but also for their PBXs,bonded by a poly-fluoro binder. The closest linear correlation exists between the E_(dr)values and dimensionless K·G^(-1) ratio which indicates the plasticity range. A similar relationship is valid also for the ΔV values. Relationships of the E_(dr) and / or ΔV values with the shear modulus or to the K·G^(-1) ratio reflect an unusual behavior of ε-HNIW to which the published morphological instability of this particular HNIW version might also be related.

关键词：爆破器料含能材料烟火器材材料学

Effects of co-precipitation temperature on structure and properties of La and Y doped cerium zirconium mixed oxides

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Transactions of Nonferrous Metals Society of China 2022年第2期32卷 618-628页

作者： Lian-jie ZHANG Mei-sheng CUI Hao WANG Yong-ke HOU Shi-lei CHEN Zhi-zhe ZHAI Zhi-qi long Yong-qi ZHANG National Engineering Research Center for Rare Earth GRINM Group Co.Ltd.Beijing 100088China General Research Institute for Nonferrous Metals Beijing 100088China GRIREM Advanced Materials Co. Ltd.Beijing 100088China GRIREM Hi-Tech Co. Ltd.Langfang 065201China

Due to the oxygen storage and release properties,cerium zirconium mixed oxides are recognized as the key material in automotive three-way *** reveal the effects of co-precipitation temperature on structure,physical and chemical properties of multi-doped cerium zirconium mixed oxides,a series of La and Y doped cerium zirconium mixed oxides(CZLYs)were synthesized via a co-precipitation method,and the physical and chemical properties of CZLYs were systemically characterized by XRD,N_(2) adsorption−desorption,TEM,XPS,oxygen storage capacity(OSC)and hydrogen temperature programmed reduction(H_(2)-TPR).The results show that co-precipitation temperature is an important parameter to influence the crystal size,oxygen storage capacity and thermal stability of *** the co-precipitation temperature was 60℃,the best redox properties and thermal stability of CZLYs were *** thermal treatment at 1100℃for 10 h,the specific surface area and oxygen storage capacity of the corresponding aged sample were 15.42 m^(2)/g and 497.7μmol/g,*** addition,a mechanism was proposed to reveal the effects of co-precipitation temperature on the structure and properties of CZLYs.

关键词： La and Y doping cerium zirconium mixed oxides co-precipitation temperature crystal size thermal stability

On-resin peptide modification of methionine residue by employing 2-bromoacetate derivatives

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Chinese Chemical Letters 2023年第4期34卷 198-202页

作者： qi-long Hu Jia-Tian Liu Guangjin Fan Jian Li Yixian Li Albert S.C.Chan Xiao-Feng Xiong Guangdong Key Laboratory of Chiral Molecule and Drug Discovery School of Pharmaceutical SciencesSun Yat-sen UniversityGuangzhou 510006China

On-resin peptide modification renders an easy-to-operate method that combines solid-phase peptide synthesis efficiency and avoids tedious purification procedures. Herein, we report the transition-metal-free and redox-neutral approach for solid-phase Met diversification with substrate diversity, which could be applied to synthesize cyclic peptides of different sizes.

关键词： Methionine 2-Bromoacetate derivatives On-resin modification Peptide Cyclization

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 ***,the enhancement of performance is often limited by the insufficient metal/metal oxide *** 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 *** characterizations verify the dynamic structural response of Pt-M alloy catalysts to air and the formation of Pt-MO_(x) catalysts with abundant interfacial *** 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