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Potassium ions and cyano group modified g-C3N4 for effective generation of H2O2 through two-electron oxygen reduction

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Science China Chemistry 2025年第1期 192-200页

作者： Dongying Wang Shulan Pu Yongmin Chen Ke Lei Yujie Duan Linjiao Mao Xuhui zeng Xi Luo Yuntao Zhang Yuqin Dong Jin Zhong Zhang yan Sun School of Mechanical Engineering Chengdu University Department of Chemistry and Biochemistry University of California

Potassium ions （K+） doped graphitic carbon nitride （g-C3N4） was prepared by a thermal etching method using potassium hydroxide （KOH） as an ion *** transform infrared spectroscopy （FTIR） and X-ray photoelectron spectroscopy （XPS）results showed that the generation of the cyano group was detected while introducing K+.Under simulated sunlight irradiation,the sample with a K+doping amount of 10%showed the highest hydrogen peroxide （H2O2） generation rate of2,140.2μmol *** apparent quantum yield （AQY） at 400 nm and the solar-to-chemical conversion （SCC） are 4.35%and1.23%,respectively.K+acted as a bridge between g-C3N4layers,which enhanced charge transfer ***,the cyano group enhanced the adsorption capacity of protons （H+） and promoted the yield of *** catalyst exhibited excellent photocatalytic stability based on four-cycle *** addition,a mechanism study showed that superoxide radicals （·O2-）were the most important active species in the reaction *** production of H2O2was achieved through consecutive single-electron *** study deepens the understanding of the oxygen reduction reaction process and opens up a new venue for improving H2O2generation.

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Liver as a new target organ in Alzheimer's disease:insight from cholesterol metabolism and its role in amyloid-beta clearance

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Neural Regeneration Research 2025年第3期20卷 695-714页

作者： Beibei Wu Yuqing Liu Hongli Li Lemei Zhu Lingfeng zeng Zhen Zhang Weijun Peng Department of Integrated Traditional Chinese&Western Medicine The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina Academician Workstation Changsha Medical UniversityChangshaHunan ProvinceChina yangsheng College of Traditional Chinese Medicine Guizhou University of Traditional Chinese MedicineGuiyangGuizhou ProvinceChina Qinhuangdao Shanhaiguan Pharmaceutical Co. LtdQinhuangdaoHebei ProvinceChina National Clinical Research Center for Mental Disorder The Second Xiangya HospitalCentral South UniversityChangshaHunan ProvinceChina

Alzheimer's disease,the primary cause of dementia,is characterized by neuropathologies,such as amyloid plaques,synaptic and neuronal degeneration,and neurofibrillary *** amyloid plaques are the primary characteristic of Alzheimer's disease in the central nervous system and peripheral organs,targeting amyloid-beta clearance in the central nervous system has shown limited clinical efficacy in Alzheimer's disease *** abnormalities are commonly observed in patients with Alzheimer's *** liver is the primary peripheral organ involved in amyloid-beta metabolism,playing a crucial role in the pathophysiology of Alzheimer's ***,impaired cholesterol metabolism in the liver may exacerbate the development of Alzheimer's *** this review,we explore the underlying causes of Alzheimer's disease and elucidate the role of the liver in amyloid-beta clearance and cholesterol ***,we propose that restoring normal cholesterol metabolism in the liver could represent a promising therapeutic strategy for addressing Alzheimer's disease.

关键词： ABCA1 Alzheimer's disease amyloid-beta apolipoprotein E cholesterol metabolism liver liver X receptor low-density lipoprotein receptor-related protein 1 peripheral clearance tauroursodeoxycholic acid

Copper-catalyzed C–H bond functionalization enabled by programmed alternating current

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Science China Chemistry 2025年第1期 10-11页

作者： Zhoumei Tan Kun Xu Chengchu zeng Beijing Key Laboratory of Environmental and Viral Oncology College of Chemistry and Life Science Beijing University of Technology

Synthetic electrochemistry has been selected as one of the Top Ten Emerging Technologies in Chemistry in 2023 by International Union of Pure and Applied Chemistry (IUPAC)[1]. It has emerged as a sustainable platform for organic synthesis and has exhibited a wide range of applications from academia to industry [2]. However, electrosynthesis has been predominantly performed by using direct current (DC).

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贵金属氮化物晶体结构、电子结构和力学性能的实验与理论研究进展

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物理 2007年第3期36卷 221-227页

作者：范长增曾松岩王渊旭姚裕贵张平刘日平王文魁哈尔滨工业大学材料科学与工程学院哈尔滨150001 日本国立材料研究所计算材料科学中心中国科学院物理研究所北京100080 北京计算物理与应用数学研究所北京100088 燕山大学材料科学与工程学院秦皇岛066004

氮化铂(Pt-N)是高温高压条件下合成的第一种块体二元贵金属氮化物,由于该化合物具有高的体弹性模量和特殊的电子结构从而吸引了世界范围内一些理论研究者的目光.Pt-N中金属原子的质量远远大于非金属原子的质量,因此X射线衍射仅能确定Pt... 详细信息

氮化铂(Pt-N)是高温高压条件下合成的第一种块体二元贵金属氮化物,由于该化合物具有高的体弹性模量和特殊的电子结构从而吸引了世界范围内一些理论研究者的目光.Pt-N中金属原子的质量远远大于非金属原子的质量,因此X射线衍射仅能确定Pt原子的位置,拉曼光谱虽然能限制N原子的对称性,但仍不能确定其具体位置.以上因素使得确定这种新合成物质的晶体结构成了理论研究的焦点,这些工作已经在高压科学中开拓了一个新的领域,即贵金属元素氮化物的高压合成与物性研究.

关键词：高压贵金属氮化物晶体结构电子结构力学性能

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孔隙定向排列多孔高温合金材料研究

热加工工艺 2006年第22期35卷 25-27页

作者：米国发李红宇刘翔宇王宏伟曾松岩河南理工大学材料学院河南焦作454000 哈尔滨工业大学材料学院黑龙江哈尔滨150001

采用粉末烧结的方法制备了孔隙定向排列多孔高温合金材料。通过实验确定了材料的烧结工艺,测定了孔隙参数,考察了合金的抗压性能。

关键词：多孔高温合金孔隙定向排列烧结工艺孔隙参数

Topological Stability and Pseudo-orbit Tracing Property for Homeomorphisms on Uniform Spaces

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Acta Mathematica Sinica,English Series 2022年第2期38卷 431-442页

作者： Ke song yan Fan Ping zeng School of Information and Statistics Guangxi University of Finance and EconomicsNanning 530003P.R.China

In this paper,we investigate the topological stability and pseudo-orbit tracing property for homeomorphisms on uniform *** introduce the concept of topological stability for homeomorphisms on compact uniform spaces and prove that if a homeomorphism on a compact uniform space is expansive and has pseudo-orbit tracing property,then it is topologically ***,we discuss the topological stability for homeomorphisms on uniform spaces from the view of *** introduce definitions of topologically stable point and shadowable point for homeomorphisms on uniform spaces and show that every shadowable point of an expansive homeomorphism on a compact uniform space is topologically stable.

关键词： Topological stability pseudo-orbit tracing property expansiveness uniform space

高强韧铸造Al-Si合金A357的成分优化

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轻合金加工技术 2005年第3期33卷 10-12页

作者：米国发孔留安朱兆军王宏伟曾松岩河南理工大学机械系河南焦作454000 哈尔滨工业大学材料学院黑龙江哈尔滨150001

研究了Si、Mg、Fe、Be等元素对A357合金性能的影响,确定了高强韧铸造Al Si合金A357优化的成分范围。

关键词： Al-Si合金成分优化力学性能

Metastable seed-crystals: epitaxial growth of branched-array organic heterostructure nanowires

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Science China Chemistry 2025年

作者： Jin Feng Zhen-Yu Geng Ting-Yao song Ying-Xin Ma Chuan-zeng Wang Wei Zhang Hong-Tao Lin Jin Zhou Shu-Ping Zhuo Shu-Hai Chen Xue-Dong Wang School of Chemistry and Chemical Engineering Shandong University of Technology Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University College of Chemistry and Chemical Engineering Hunan Normal University

Tunable light–matter interactions are exhibited by organic low-dimensional crystals, making these crystals a promising platform for organic photonics. However, the precise synthesis of organic low-dimensional crystals remains challenging due to the stochastic nature of molecular nucleation processes. Herein, the directed nucleation process is driven by the introduction of metastable seed-crystals as the trunk, which ultimately leads to branched-array organic heterostructures. The successful formation of organic heterostructures with high-density branched arrays is attributed to the highest attachment energy (Eatt（023）=-104.25 kcal mol-1) of the exposed （023） crystal plane during the seed-crystal growth route. Significantly, these as-prepared heterostructures inherently have an ultralow lattice mismatch ratio η of 0.7%between trunk and branch, which contributes to the multi-channel photon transportation. Therefore, this work provides valuable insights into a versatile synthetic strategy for accessing low-dimensional heterostructures for integrated optoelectronics.

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Al-Si-Mg合金的晶粒细化工艺及细化机理研究

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铸造技术 2008年第2期29卷 216-219页

作者：米国发王狂飞朱兆军王宏伟曾松岩河南理工大学材料学院河南焦作454000 哈尔滨工业大学材料学院黑龙江哈尔滨150001

通过对Al-5Ti-1B中间合金细化作用的实验研究发现,Al-Si-Mg合金晶粒尺寸明显减小,合金的力学性能提高,尤其是伸长率,并且具有很好的抗衰退能力。细化作用是由于Al3Ti与稳定的TiB2颗粒共存于熔体中,并且Al3Ti在硼化物的{0001}基面上形成... 详细信息

通过对Al-5Ti-1B中间合金细化作用的实验研究发现,Al-Si-Mg合金晶粒尺寸明显减小,合金的力学性能提高,尤其是伸长率,并且具有很好的抗衰退能力。细化作用是由于Al3Ti与稳定的TiB2颗粒共存于熔体中,并且Al3Ti在硼化物的{0001}基面上形成稳定的膜。α-Al的生核发生在Al3Ti膜上。α-Al仅限于在{0001}晶面上生核,表明决定生核效率的主要因素是{0001}晶面的面积。

关键词： Al-Si-Mg合金晶粒细化机理