摘要：The development of an efficient artificial H_(2)O_(2) photosynthesis system is a challenging work using H_(2)O and O_(2) as starting ***,3D In_(2.77)S_(4) nanoflower precursor was in-situ deposited on K^(+)-doped g-C_(3)N_(4)(KCN)nanosheets using a solvothermal method,then In_(2.77)S_(4)/KCN(IS/KCN)het-erojunction with an intimate interface was obtained after a calcination *** investigation shows that the photocatalytic H_(2)O_(2) production rate of 50IS/KCN can reach up to 1.36 mmol g^(-1)h^(-1)without any sacrificial reagents under visible light irradiation,which is 9.2 times and 4.1 times higher than that of KCN and In_(2.77)S_(4)/*** enhanced activity of the above composite can be mainly attributed to the S-scheme charge transfer route between KCN and In_(2.77)S_(4) according to density functional theory calculations,electron paramagnetic resonance and free radical capture tests,leading to an expanded light response range and rapid charge separation at their interface,as well as preserving the active electrons and holes for H_(2)O_(2) ***,the unique 3D nanostructure and surface hydrophobicity of IS/KCN facilitate the diffusion and transportation of O_(2) around the active centers,the energy barriers of O_(2) protonation and H_(2)O_(2) desorption steps are ef-fectively reduced over the *** addition,this system also exhibits excellent light harvesting ability and *** work provides a potential strategy to explore a sustainable H_(2)O_(2) photo-synthesis pathway through the design of heterojunctions with intimate interfaces and desired reac-tion thermodynamics and kinetics.

摘要：Ag nanoparticles (NPs) were deposited on the surface of g-C3N4 (CN) by an in situ calcination method. NiS was successfully loaded onto the composites by a hydrothermal method. The results showed that the 10 wt%-NiS/1.0 wt%-Ag/CN composite exhibits excellent photocatalytic H2 generation performance under solar-light irradiation. An H2 production rate of 9.728 mmol·g^-1·h^-1 was achieved, which is 10.82-, 3.45-, and 2.77-times higher than those of pure g-C3N4, 10 wt%-NiS/CN, and 1.0 wt%-Ag/CN composites, respectively. This enhanced photocatalytic H2 generation can be ascribed to the co-decoration of Ag and NiS on the surface of g-C3N4, which efficiently improves light harvesting capacity, photogenerated charge carrier separation, and photocatalytic H2 production kinetics. Thus, this study demonstrates an effective strategy for constructing excellent g-C3N4-related composite photocatalysts for H2 production by using different co-catalysts.

摘要：硒化锑(Sb_(2)Se_(3))属于窄带隙半导体材料,具有良好的光吸收特性,已逐渐应用于光电催化领域.独特的一维(Sb_(4)Se_(6))_(n)带状结构单元连接方式,使其载流子传输具有高度各向异性.本文通过气相输运沉积法和原位水热法成功构建了还原氧化石墨烯(rGO)修饰的准一维Sb_(2)Se_(3)@In_(2)S_(3)光陷阱异质结.研究结果表明,在rGO空间限域效应下,原位生长的非层状In_(2)S_(3)纳米片厚度从30 nm减小到10 nm,显著增加了光电极的电化学活性比表面积,进一步增强了光陷阱纳米结构对光的捕获能力.rGO和超薄In_(2)S_(3)纳米片共同修饰的准一维毛刷状Sb_(2)Se_(3)@In_(2)S_(3)-rGO纳米棒光电极在0 V(相对于可逆氢电极)的外加偏压下,光电流密度可达1.169 m A cm^(-2),约是Sb_(2)Se_(3)@In_(2)S_(3)和单体Sb_(2)Se_(3)的2倍和16倍,且稳定性良好,在中性条件下平均产氢速率为16.59μmol cm^(-2)h^(-1).实验结果和理论计算均表明,Ⅱ型异质结电荷传输方式是其光电化学增强的物理机制.以上工作为设计基于rGO修饰的复合光电极用于光电化学领域的研究提供了崭新的思路.

摘要：加强课堂教学管理是保障教学质量的重要环节。以西北大学化工学院“化学反应工程”课堂教学过程管理为例,对传统课堂考勤进行了新探索,证实“定位”式课堂签到在信息化时代具有重要存在价值,不仅可以实现准确快速考勤,改善课堂学风,而且“定位”轨迹和学习效果之间的“定位”效应是关注学生课程学习状态,改进课堂教学方式、教学内容等有效依据。实践证明,“定位”式课堂签到是强化教学过程管理的有效措施,对于开展工程教育认证持续改进工作具有积极推动作用。

摘要：“化工设计”为化工学科的核心课程,是工程知识向工程能力转化的关键课程。传统“化工设计”课程存在课堂教学与能力培养脱节、个体问题难以解决、课程思政内容融入不佳等问题,学生工程能力培养效果不佳。教学团队本着“沉浸式教学、阶梯式实践、成就性感受”的教学理念,秉着“以能力培养为目标、立德树人为宗旨,以服务实践为任务、工程实践为抓手,提升课堂获得感和设计成就感”的课程改革思路,通过教学内容重构、沉浸式教学、无界课堂和阶梯式实践等一系列教学策略,并多角度融入思政元素,以实现协同育人和立德树人。创新策略的实施能够促使学生深度参与化工设计实践,真正实现工程知识内化,提高工程能力。

摘要：TiO2光催化剂的改性、光催化反应器的设计以及操作参数等影响着TiO2在降解液相污染物时的光催化性能。综述了TiO2改性的各种机理,指出了反应器设计面临的难题,探讨了pH、温度、溶氧量、TiO2用量、污染物浓度、光强度等操作参数对催化性能的影响。最后,展望了TiO2光催化的发展趋势。