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Chinese Chemical Letters 2024年第6期35卷 404-408页

作者： Xiuzheng Deng Changhai Liu Xiaotong Yan Jingshan Fan qian liang Zhongyu Li Advanced Catalysis and Green Manufacturing Collaborative Innovation Center CNPC-CZU Innovation AllianceSchool of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China School of Materials Science&Engineering Changzhou UniversityChangzhou 213164China

The efficient conversion of CO_(2) into hydrocarbon fuels(CH_(4))with high selectivity is considered as a great challenge in photocatalysis owing to the multiple-electron transfer pathway and competitive H_(2) ***,we developed carbon dots(CDs)-modulated S-scheme heterojunction of CDs/NiAl-LDH@In_(2)O_(3)(C-DH@IN)through a facile in-situ hydrothermal *** to the multi-shell nanotube structure,the C-DH@IN shows an enhanced CH_(4) evolution rate of 10.67μmol h^(-1)g^(-1)and higher selectivity of CH_(4)(85.70%)compared with In_(2)O_(3) and Ni Al-LDH@In_(2)O_(3) binary catalyst in the pure water without sacrificial *** spin resonance(ESR)and in situ Fourier transform infrared spectra verify that the constructed S-scheme heterojunction can possess the strong redox capability and the HCOOand CH_(3)O-as critical intermediates play an important role in selective CO_(2) reduction to generate CH_(4).Furthermore,CDs with superior photoabsorption can boost the electron transfer and absorb H^(+),thus improving the integration of H^(+)and CO_(2) ***,this work emphasizes a facile strategy to achieve efficient CO_(2)-to-CH_(4) conversion based on construction of CDs-based heterojunction catalysts.

关键词： Carbon dots In_(2)O_(3) Layered double hydroxides Photocatalytic CO_(2) reduction S-scheme

Construction of ZnO@CDs@Co_(3)O_(4) sandwich heterostructure with multi-interfacial electron-transfer toward enhanced photocatalytic CO_(2) reduction

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Chinese Chemical Letters 2024年第4期35卷 147-152页

作者： Xiuzheng Deng Yi Ke Jiawen Ding Yingtang Zhou Hui Huang qian liang Zhenhui Kang Advanced Catalysis and Green Manufacturing Collaborative Innovation Center CNPC-CZU Innovation AllianceSchool of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow UniversitySuzhou 215123China Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control National Engineering Research Center for Marine AquacultureMarine Science and Technology CollegeZhejiang Ocean UniversityZhoushan 316004China

Photocatalytic conversion of CO_(2) into small-molecule chemical feedstocks can meet the growing demand for energy and alleviate the global warming. Herein, a p-n ZnO@CDs@Co_(3)O_(4) heterojunction with sandwich structure was constructed by calcination method of self-assembled ZIF-8@CDs@ZIF-67. The ZnO@CDs@Co_(3)O_(4) with well-defined interfacial structure exhibited the significantly enhanced photocatalytic CO_(2) reduction activity, and the optimal catalyst indicated the(CO + CH_(4)) evolution rate of 214.53μmol g^(-1)h^(-1) under simulated solar light, which was superior to ZnO, Co_(3)O_(4) and binary ZnO@Co_(3)O_(4).The internal cavity, exposed active sites, multiple interfaces and constructed p-n heterojunction can facilitate the light harvesting and photoexcited electron transfer. Besides, after introduction of CDs placed in the middle layer between ZnO and Co_(3)O_(4), CDs with excellent photoelectric property further promoted charge separation and migration. This work represents an appealing strategy to construct well-defined photocatalysts for boosting CO_(2) photoreduction.

关键词： Metal-organic framework Photocatalytic CO_(2) reduction Carbon dots p-n heterojunction Sandwich heterostructure

Strain-promoted S-arylation and alkenylation of sulfinamides using arynes and cyclic alkynes

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Science China Chemistry 2024年第3期67卷 928-935页

作者： Xi Zou Boming Shen Gao-lin Li qian liang Yanhua Ouyang Binghe Yang Peiyuan Yu Bing Gao State Key Laboratory of Chemo/Bio-Sensing and Chemometrics College of Chemistry and Chemical EngineeringInstitute of Chemical Biology and NanomedicineHunan UniversityChangsha 410082China Department of Chemistry and Shenzhen Grubbs Institute Guangdong Provincial Key Laboratory of CatalysisSouthern University of Science and TechnologyShenzhen 518055China

The conversion of commercially available chiral sulfinamides into pharmaceutically useful chiral sulfoximines via direct SIVfunctionalization is synthetically attractive but challenging due to the competitive reaction of N-functionalization. Herein, we disclose a novel strain-release strategy to access stereospecific and chemoselective SIV-arylation and alkenylation of sulfinamides using arynes and strained cyclic alkynes. This method tolerates an unprecedented chemical diversity of functional groups attached to the nitrogen center(N-R). The origin of the high SIV-selectivity is elucidated by density functional theory calculations, suggesting a stepwise mechanism for the aryne substrates and a concerted mechanism for the cyclic alkynes.

关键词： arylation alkenylation sulfoximines sulfinamides arynes

Effects of vacancy and external electric field on the electronic properties of the MoSi_(2)N_(4)/graphene heterostructure

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Chinese Physics B 2024年第3期33卷 542-550页

作者：梁前罗祥燕钱国林王远帆梁永超谢泉 College of Big Data and Information Engineering Institute of New Optoelectronic Materials and TechnologyGuizhou UniversityGuiyang 550025China

Recently,the newly synthesized septuple-atomic layer two-dimensional(2D)material MoSi_(2)N_(4)(MSN)has attracted attention *** work delves into the effect of vacancies and external electric fields on the electronic properties of the MSN/graphene(Gr)heterostructure using first-principles *** find that four types of defective structures,N-in,N-out,Si and Mo vacancy defects of monolayer MSN and MSN/Gr heterostructure are stable in ***,vacancy defects can effectively modulate the charge transfer at the interface of the MSN/Gr heterostructure as well as the work function of the pristine monolayer MSN and MSN/Gr ***,the application of an external electric field enables the dynamic switching between n-type and p-type Schottky *** work may offer the possibility of exceeding the capabilities of conventional Schottky diodes based on MSN/Gr heterostructures.

关键词： MoSi_(2)N_(4) vacancy defects external electric field Schottky contacts

Teaching Design of Course Building Decoration Materials Based on Generative Artificial Intelligence

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Journal of Landscape Research 2024年第3期16卷 83-87页

作者： LIU Yanan HONG Xiaochun qian liang School of Architectural Engineering Yangzhou Polytechnic InstituteYangzhouJiangsu 225127China College of Architectural Science and Engineering Yangzhou UniversityYangzhouJiangsu 225127China

With the digital transformation of global education and China's emphasis on education digital,generative AI technology has been widely used in the field of higher *** this paper,the development of generative AI technology and its potential in personalized learning,interactive content creation and adaptive assessment in education were introduced ***,the application case of generative AI tools in teaching content creation,scenario-based teaching content development,visual teaching content development,complex concept deconstruction and analogy,student-led application practice and other aspects in the teaching of Building Decoration Materials was *** the teaching experiment and effect evaluation,the positive influence of generative AI technology on the improvement of students'learning effect and teaching efficiency was ***,some thoughts and inspirations on the combination of educational theory and generative AI technology,the integration of teaching design and generative AI technology,and the practice cases and effect evaluation were put forward,and the importance of teacher role transformation and personalized learning path design was emphasized to provide theoretical and practical support for the innovative development of higher education.

关键词： Generative artificial intelligence Higher education Teaching design Education digitization

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MRI影像组学在脑胶质瘤中的研究进展

磁共振成像 2024年第2期15卷 192-197页

作者：梁倩张辉山西医科大学医学影像学院太原030001 山西医科大学第一医院影像科太原030001

脑胶质瘤是中枢神经系统最常见的原发性恶性肿瘤,实现脑胶质瘤的鉴别诊断、术前预测脑胶质瘤的病理分级、基因分型、肿瘤微环境和胶质瘤的预后评估对于实施个体化治疗具有重要临床意义。近年来,影像组学以其无创、精准的特点在脑胶质瘤... 详细信息

脑胶质瘤是中枢神经系统最常见的原发性恶性肿瘤,实现脑胶质瘤的鉴别诊断、术前预测脑胶质瘤的病理分级、基因分型、肿瘤微环境和胶质瘤的预后评估对于实施个体化治疗具有重要临床意义。近年来,影像组学以其无创、精准的特点在脑胶质瘤的诊疗中取得了较大进展。本文就MRI影像组学在脑胶质瘤中的研究进展予以综述,以拓展MRI影像组学在脑胶质瘤精准诊疗中的新思路,从而为脑胶质瘤的诊断和个体化管理提供临床指导意义。

关键词：脑胶质瘤影像组学磁共振成像鉴别诊断术前分级基因分型预后评估肿瘤微环境

数字文化产业中用户劳动平台化的算法补足网络——以秀场直播为例

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现代传播（中国传媒大学学报） 2024年第4期46卷 8-17页

作者：易前良潘莹上海大学新闻传播学院苏州大学传媒学院

数字平台在扩张过程中通过基于算法系统的制度性安排,在自身之外发展出补充性的中介网络,将海量用户劳动纳入资本循环之中,并通过生产出一种新的文化机制而使之合理化。首先,“算法补足网络”的分析框架重点关注居于数字平台和劳动之间... 详细信息

数字平台在扩张过程中通过基于算法系统的制度性安排,在自身之外发展出补充性的中介网络,将海量用户劳动纳入资本循环之中,并通过生产出一种新的文化机制而使之合理化。首先,“算法补足网络”的分析框架重点关注居于数字平台和劳动之间的中间地带,有助于规避剥削与解放的二元对立模式。其次,探讨数字影响者、文化代理机构与算法系统何以通过相互转译构成劳动控制网络,可为未来的人机传播研究提供实证案例和理论参考。最后,秀场直播在劳动控制过程中生产出来的算法化家族文化,启发数字文化生产的未来研究应充分关照本土的社会结构与文化脉络。

关键词：数字文化产业平台算法用户劳动秀场直播

二维MoSi_(2)N_(4)/WSe_(2)异质结的第一性原理研究

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原子与分子物理学报 2024年第2期41卷 87-92页

作者：梁前谢泉贵州大学大数据与信息工程学院新型光电子材料与技术研究所贵阳550025

实验上新合成的MoSi_(2)N_(4)(MSN)由于其独特的七原子层结构和电子特性引起了人们的广泛关注.本文搭建了一种由二维MSN与二维WSe_(2)(WS)垂直堆垛而成的二维MSN/WS异质结并基于第一性原理计算对其电子性质进行了计算,其表现出直接间隙... 详细信息

实验上新合成的MoSi_(2)N_(4)(MSN)由于其独特的七原子层结构和电子特性引起了人们的广泛关注.本文搭建了一种由二维MSN与二维WSe_(2)(WS)垂直堆垛而成的二维MSN/WS异质结并基于第一性原理计算对其电子性质进行了计算,其表现出直接间隙半导体和I型能带排列的特性,具有1.46 eV的带隙.在异质结界面处存在一个由电荷耗尽层MSN指向电荷积累层WS微弱的内建电场.最后,通过施加双轴应变对二维MSN/WS异质结进行调控.发现在正双轴应变的作用下,MSN/WS异质结保持了原来直接带隙半导体和I型能带排列特性;在负双轴应变作用下,MSN/WS异质结由原来的直接带隙半导体转变为间接带隙半导体,当施加的负双轴应变达到-6%与-8%时,I型能带排列转变为Ⅱ型能带排列.

关键词： MoSi_(2)N_(4) WSe_(2) 双轴应变能带排列

2000—2018年西昆仑山冰川表面运动特征研究——基于ITS_LIVE数据

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冰川冻土 2024年第2期46卷 367-378页

作者：梁倩王宁练陕西省地表系统与环境承载力实验室陕西西安710127 西北大学城市与环境学院地表系统与灾害研究院陕西西安710127

近年来,西昆仑山冰川物质平衡异常现象受到广泛关注,然而该地区冰川末端却同时存在前进(常态)、后退、稳定及跃动多种状态。冰川末端进退不仅与气候变化引起的物质平衡变化有关,还与冰川的运动速度变化密切相关。以往研究多集中在前者,... 详细信息

近年来,西昆仑山冰川物质平衡异常现象受到广泛关注,然而该地区冰川末端却同时存在前进(常态)、后退、稳定及跃动多种状态。冰川末端进退不仅与气候变化引起的物质平衡变化有关,还与冰川的运动速度变化密切相关。以往研究多集中在前者,而对后者研究较少。因此,本文基于ITS_LIVE v01速度产品,结合西昆仑山冰川表面高程变化及冰川厚度资料,分析西昆仑山地区具有不同变化状态的冰川在2000—2018年的表面运动速度变化特征。结果表明,西昆仑山冰川在研究时段内的多年平均运动速度为6.35 m·a^(-1),年均速度波动上升,这主要是由该区域冰川表面高程整体上呈增加趋势[(0.15±0.02)m·a^(-1)]即冰川物质增加所造成;末端前进冰川的多年平均运动速度为4.07 m·a^(-1),年平均运动速度在研究时段内呈增加趋势,这主要与该类冰川在研究时段内物质略微增加有关;末端后退冰川多年平均速度约为4.86 m·a^(-1),年平均运动速度在研究时段内呈减小趋势,这主要与该类冰川物质亏损、减薄有关;末端稳定冰川多年平均速度约为3.04 m·a^(-1),年平均运动速度在研究时段内保持稳定,该类冰川在研究时段物质平衡也基本处于零平衡状态。研究区内末端前进冰川的多年平均运动速度较末端后退冰川的偏小,主要是因为末端前进冰川的平均厚度较末端后退冰川的偏小。2000—2018年西昆仑山有7条冰川发生跃动,多年平均运动速度为13.21 m·a^(-1),物质积累[(0.35±0.02)m·a^(-1)]引起速度增加。长度规模较大的后退冰川在2000年之前发生过跃动,由于目前处于平静期,冰川上部积累的物质未能及时输送到下部导致冰舌厚度减薄并后退。

关键词：西昆仑山冰川运动速度冰川厚度冰川表面高程冰川跃动

体素内不相干运动MRI预测脑胶质瘤异柠檬酸脱氢酶及1p/19q分子分型

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中国医学影像技术 2024年第6期40卷 805-809页

作者：李俊杰梁倩景辉山西医科大学医学影像学院山西太原030001 太原钢铁(集团)有限公司总医院磁共振室山西太原030008

目的观察体素内不相干运动(IVIM)MRI预测脑胶质瘤异柠檬酸脱氢酶(IDH)及其1p/19q分子分型的价值。方法回顾性纳入32例脑胶质瘤患者,根据IDH检测结果分为IDH突变组(n=18)及野生组(n=14),并根据染色体1p/19q检测结果将突变组分为1p/19q共... 详细信息

目的观察体素内不相干运动(IVIM)MRI预测脑胶质瘤异柠檬酸脱氢酶(IDH)及其1p/19q分子分型的价值。方法回顾性纳入32例脑胶质瘤患者,根据IDH检测结果分为IDH突变组(n=18)及野生组(n=14),并根据染色体1p/19q检测结果将突变组分为1p/19q共缺失亚组(n=5)与非共缺失亚组(n=13)。比较组间、亚组间一般资料和IVIM参数,包括表观弥散系数(ADC)、慢弥散系数(D)、快弥散系数(D^(*))、灌注分数(f)、相对ADC(rADC)、相对D(rD)、相对D^(*)(rD^(*))及相对f(rf)值,分析其预测脑胶质瘤分子分型的效能。结果突变组患者年龄小于野生组(t=-4.274,P=0.001)。突变组ADC、rADC及D值高于野生组,D^(*)及rf值低于野生组(P均<0.05)。以ADC、rADC、D、D^(*)及rf值预测脑胶质瘤IDH分型的曲线下面积(AUC)分别为0.80、0.76、0.74、0.78及0.72。共缺失亚组D^(*)值大于非共缺失亚组(P<0.05);以D^(*)值预测IDH突变型脑胶质瘤1p/19q分型的AUC为0.88。结论脑胶质瘤ADC、rADC、D、D^(*)及rf值均有助于预测IDH突变,D^(*)值还有助于预测染色体1p/19q共缺失。

关键词：胶质瘤异柠檬酸脱氢酶染色体体素内不相干运动