基于慕课建设“大学化学实验”国家级一流课程
陈咏梅, 张丽丹, 李顺来, 张春婷, 崔猛, 徐庆红, 靳兰, 李春闯, 吕志
【大学化学】doi: 10.3866/PKU.DXHX202404017
化学实验慕课为解决实验教学受场地容量、仪器设备数量或时间固定等限制提供了一种解决途径,但慕课建设过程和使用中容易出现“只建不用”“学生不愿用”“老师不会用”等问题,化学化工国家级实验教学示范中心(北京化工大学)围绕“如何将慕课作为提高化学实验教学质量的有效手段”开展深入思考并勇于实践,建设了丰富的线上实验教学资源、构建了融洽的线上线下混合式实验教学模式、制定了教学团队能力提升方案以及教学质量跟踪及反馈闭环管理体系,取得良好教育教学效果。
关键词: 化学实验教学, 课程建设, 慕课
用心浇灌,春暖“化”开——东北师范大学化学学科研究生培养
赵威, 甘莹, 毕锡和
【大学化学】doi: 10.3866/PKU.DXHX202312032
研究生培养肩负着高层次人才培养和创新创造的使命,是国家发展的重要基石。东北师范大学化学学科以立德树人、服务需求、提高质量、追求卓越为主线,重点从完善培养方案,严控培养环节,强化论文质量管控,落实创新成果要求,创新人才培养一体化五方面举措,努力构建质量更高、效益更好、优势充分释放的研究生培养体系。
关键词: 研究生培养体系, 创新人才培养, 质量管控
BiOCl/聚苯胺的制备及其光催化降解罗丹明B性能
张霞, 白羽石, 常熙, 张晗, 张灏昱, 彭利满, 黄姝姝
【无机化学学报】doi: 10.11862/CJIC.20240255
采用原位聚合法制备了氯氧化铋(BiOCl)与聚苯胺(PANI)复合的Ⅱ型异质结光催化剂BiOCl/PANI,并采用X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、紫外可见漫反射光谱(UV-Vis DRS)和N2吸附-脱附测试等多种技术手段对其进行了表征,考察了BiOCl/PANI在模拟可见光下对罗丹明B (RhB)的光催化降解性能。实验结果表明:BiOCl/PANI催化剂比PANI和BiOCl具有更高的光催化活性,在RhB质量浓度为50 mg·L-1、PANI与BiOCl的物质的量之比为0.02∶1、50 mg·L-1的催化剂条件下,所制备的BiOCl/PANI光催化150 min后,RhB降解率为98.8%,速率常数为0.031 min-1;经过4次循环实验后,RhB降解率从98.8%降低至98.4%,表现出良好的稳定性和可重复利用性。光催化剂BiOCl/PANI实现了电子和空穴对的快速分离,降低了二者在催化剂内部的复合速率,提高了光催化性能。
关键词: 光催化, Ⅱ型异质结, BiOCl/polyaniline, 罗丹明B
荧光定量分析实验的改进——化学计量学辅助的三维荧光法同时测定食品中的罗丹明6G和罗丹明123
文密, 贾宝硕, 柴永琪, 王童, 刘剑波, 吴海龙
【大学化学】doi: 10.12461/PKU.DXHX202405147
仪器分析实验“分子荧光法测定罗丹明B的含量”存在实验过于简单、未考虑实际情况等问题。因此,本改进实验在三维荧光扫描模式下获取样本数据,不进行复杂预处理,而是运用化学计量学算法解析出目标分析物的纯信号,进而实现了染色辣椒中罗丹明6G和123的同时测定。本改进实验提高了学生全面考虑问题和创新解决问题的能力。
关键词: 罗丹明6G, 罗丹明123, 三维荧光, 化学计量学, 染色辣椒
基于“翻转课堂+慕课”教学模式下有机化学实验英文课程的教学探索与实践
蒋俊, 兰泉, 郑媛, 查正根
【大学化学】doi: 10.12461/PKU.DXHX202410094
有机化学实验作为高等学校化学专业本科生的四大基础实验课程之一,对提高学生动手能力,拓展创新思维有不可替代的作用。而全英文教学对于学生跟踪前沿科技及国际化交流等有极大助力。我校有机化学实验英文课程采用“翻转课堂+慕课”教学模式,教学中“以学生为中心,以问题为导向”,提升学生自主学习及知识整合的能力。该课程有效帮助学生实现“深度学习”,拓宽实验教学的深度和广度,提升国际化人才培养水平。
关键词: 有机化学实验, 全英文教学, 翻转课堂, 慕课, 深度学习
慕课西行背景下新疆师范大学化学专业核心课程多校多向同步课堂智慧教学探索实践
关明, 白希, 马玉花, 米芳, 范维刚, 郭俊杰, 李桂新, 王英波, 曾涵, 曾竟, 肖璐, 李茵萍, 杜虹, 高雅
【大学化学】doi: 10.12461/PKU.DXHX202412123
教育部明确提出实施“慕课西部行计划”,强调数智赋能,更好地实现因材施教。新疆师范大学化学专业核心课程教学团队,以新时代党的治疆方略为指引,以培养西部区域性人才为导向,依托“智慧树”平台,借助东西部高校课程共享联盟优质资源,运用知识图谱与AI共享课程,作为合作方与疆外名校合作,又作为开课方与疆内高校合作,开展同步课堂,共建知识图谱,实现多校教学资源共享、多向同步课堂共享、数智赋能平台共享,构建了多校多向同步课堂新型合作模式与基于人工智能知识图谱的新型教学形态。
关键词: 数智赋能, 慕课西行, 化学专业核心课程, 同步课堂, 教学新形态
Construction and photocatalytic properties toward rhodamine B of CdS/Fe3O4 heterojunction
Yuan CONG, Yunhao WANG, Wanping LI, Zhicheng ZHANG, Shuo LIU, Huiyuan GUO, Hongyu YUAN, Zhiping ZHOU
【无机化学学报】doi: 10.11862/CJIC.20240219
A simple two-step hydrothermal method synthesized four different CdS/Fe3O4 photocatalysts with varying ratios of mass of CdS to Fe3O4. The composition and morphology of the prepared samples were investigated using X-ray diffraction (XRD), Raman spectrum, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Solid UV reflectance spectra testing found that CdS/Fe3O4 nanocomposites had good light absorption throughout the spectral range, promoting their photocatalytic properties. Under visible light irradiation, CdS/Fe3O4 (2:5) with a mass ratio of 2:5 exhibited excellent photocatalytic performance, with a degradation rate of 98.8% for rhodamine B. Furthermore, after five cycles of photocatalytic degradation reaction, the rhodamine B degradation rate remained at 96.2%, indicating that the photocatalysts have good photocatalytic stability.
关键词: CdS/Fe3O4, photocatalyst, degradation rate, rhodamine B
Corn straw-derived carbon/BiOBr composite: Synthesis and photocatalytic degradation performance for rhodamine B
Jin ZHANG, Yuting WANG, Bin YU, Yuxin ZHONG, Yufeng ZHANG
【无机化学学报】doi: 10.11862/CJIC.20250028
A flower-like BiOBr photocatalyst (CS/BiOBr) was prepared by using the carbon material derived from corn straw (CS) as the carrier. The prepared composites were characterized by X - ray diffraction (XRD), Fourier transform infrared (FIIR) spectra, scanning electron microscope (SEM), X - ray photoelectron spectra (XPS), and UV-Vis diffuse reflectance spectra (UV-Vis DRS). The SEM analyses indicate that the introduction of CS promotes the formation of a unique flower-like structure in BiOBr, which not only optimizes the efficiency of light capture but also increases the specific surface area of BiOBr. The bandgap of the composite was narrower compared with the pure BiOBr. The CS/BiOBr composites exhibited higher photocatalytic activity than pure CS and BiOBr under visible light irradiation, and a higher first-order reaction rate constant (k) of 0.043 7 min-1 than BiOBr (0.014 6 min-1), and exhibited excellent stability and reusability during the cyclic run. The enhanced photocatalytic activity is attributed to the efficient separation of photoinduced electrons and holes. Superoxide radicals and holes were the major active species.
关键词: corn straws, agricultural waste, BiOBr, photocatalysis, rhodamine B
In-situ synthesis of Bi2O3@BiVO4 composite via solvothermal method and its adsorption performance for rhodamine B in water
Xian XIA, Qin SHI, Wanyi SU, Qingjun XUE, Honghui PAN, Xixiang LIU, Chuanqi ZHAO
【无机化学学报】doi: 10.11862/CJIC.20250311
Bi2O3@BiVO4 composites were synthesized using the solvothermal method with ethylene glycol as the solvent. Bi2O3 was grown on the surface of BiVO4 by regulating the reaction temperature. The adsorption performance of the composite for rhodamine B (RhB) was investigated. The results indicate that the reaction temperature significantly impacts the morphology and adsorption performance of Bi2O3@BiVO4. The Bi2O3@BiVO4 composite prepared at 180 ℃ (180-BO@BVO) consisted of nanoparticles with an average size of 7 nm, featuring a higher concentration of oxygen vacancies on the surface, but with a lower specific surface area (only 1.2 m2·g-1). 180-BO@BVO, with oxygen species adsorbed at surface oxygen vacancies carrying a negative charge, achieved an impressive RhB removal efficiency of up to 83.0% through electrostatic interaction with RhB. The adsorption process follows the Langmuir isotherm and the pseudo-second-order kinetic model, suggesting that it is predominantly governed by chemical adsorption. After five cycles of adsorption experiments, the removal efficiency of RhB by composites remained basically unchanged (more than 80%), demonstrating excellent regeneration performance.
关键词: Bi2O3, BiVO4, oxygen vacancy, dye adsorption
硫化FeOCl光催化芬顿降解罗丹明B的性能研究——推荐一个综合化学实验
曾超, 曾鹏伟
【大学化学】doi: 10.12461/PKU.DXHX202506057
本文介绍了一种污水处理方法——光催化-非均相芬顿耦合技术,引导学生以光芬顿降解罗丹明B作为研究对象。采用原位离子交换反应制备硫化FeOCl (FeS/FeOCl)异质结催化剂,表征其结构、形貌和光学性质,并探究其光芬顿降解罗丹明B的性能。该实验易于操作,现象明显,有助于提高本科生的实验操作技能,培养科研能力,并增强环保意识。
关键词: 光催化, 芬顿反应, 综合化学实验, 氯化铁

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