摘要：To improve separation efficiency of the photogenerated electron-hole pairs,constructing a heterojunction is considered to be a promising ***,the fabrication of heterojunction via a facile route to achieve a substantial improvement in photocatalytic performance is still *** this work,a well-designed nanosheet-based rodlike step-scheme(S-scheme)heterojunction Bi_(4)O_(5)I_(2)/Bi_(4)O_(5)Br_(2) with rich oxygen vacancies(OVs)(Bi_(4)O_(5)I_(2)/Bi_(4)O_(5)Br_(2)-OV)was easily synthesized by calcining BiOAc0.6Br0.2I0.2(Ac-=CH3 COO-)*** as-prepared Bi4O5I2/Bi4O5Br2-OV exhibited excellent visible light photocatalytic performance towards antibiotic tetracycline(TC)and dye rhodamine B(Rh B)degradation and removal rate reached 90.2% and 97.0%within 120 min,respectively,which was higher than those of Bi4O5I2-OV(56.8% and 71.8%),Bi4O5Br2-OV(47.4%and 68.4%),solid solution BiOAc0.6Br0.2I0.2(67.0% and 84.0%)and Bi_(4)O_(5)I_(2)/Bi_(4)O_(5)Br_(2) with poor oxygen vacancies(Bi4O5I2/Bi4O5Br2-P)(30.6%and 40.4%).Owing to the release of heat and generation of reducing carbon during calcining the precursor with Ac-,it could not only reduce the generation temperature of Bi-rich bismuth oxyhalides,which thus decreased particle size and increased surface areas,but also introduce surface OVs,which could trap photoelectrons and inhibit the recombination of *** addition,the calcination of single solid solution precursor benefited to the formation of well-alloyed interfaces with larger contact areas between 2D/2D nanosheet-like materials,which facilitates charge carriers transfer at the *** Bi4O5I2/Bi4O5Br2-OV also shows the desirable removal rate for TC and Rh B in actual wastewater or in the presence of some *** study provides an effective and simple strategy for designing OVs modified Bi-rich oxyhalides heterojunctions.

摘要：Constructing step-scheme(S-scheme)heterojunctions can considerably facilitate separation and transfer of photocarriers,as well as promote strong redox *** interface resistance of heterojunctions immediately affects photocarrier separation and determines the photocatalytic ***,we constructed a novel Bi OBr/Ni_(2)P/g-C_(3)N_(4) heterojunction using Ni_(2)P as a novel electron bridge to reduce the interfacial resistance of photocarriers between Bi OBr and *** as-prepared 10% BiOBr/Ni2P/g-C_(3)N_(4) sample exhibited outstanding visible-light photocatalytic performance for methyl orange and rhodamine B removal,with degradation efficiencies of 91.4% and 98.9%,*** excellent photocatalytic activity of Bi OBr/Ni_(2)P/g-C_(3)N_(4) was mainly attributed to the synergistic effects of the Ni2P cocatalyst and S-scheme heterojunction,which not only reduced the interface resistance but also retained the strong redox potential of the *** addition,the formation of the S-scheme system was supported by active oxygen species investigation,current-voltage curves,and density functional theory *** work provides a guideline for the design of highly efficient S-scheme photocatalysts with transition metal phosphates as electron bridges to improve photocarriers separation.

摘要：思政元素有效融入,是实现课程育人的重要基础工作。本研究对《旅游概论》课程中蕴含的思政育人元素进行充分挖掘,确定了政治认同、家国情怀等五个方面的培养目标,对课程思政元素与知识点进行融合设计,从课前精选“融料”、课中精准“融入”、课外精心“融化”三阶段对课程育人实施路径做了探索,以期更好地将学生的价值塑造融入知识传授、能力培养中,提升育人成效,达到育人目标。

摘要：基础化学实验是化学类专业学生的最基础的实验操作学习过程,是实现理论与实践的完美结合的途径之一。但是,简单的基础实验操作已满足不了当今日益激烈竞争的社会需求,尤其是今后从事化学行业工作以及科学研究工作者。因此,适当地引入一些基础科学实验到化学类专业学生的学习中是非常必要的,本文以设计简单的“光催化降解有机污染物四环素的实验”为例帮助化学类专业学生了解光催化去除有机污染物的基本原理,实现了将高毒性的有机污染物降解为无毒性的无机盐分子至进一步分解为二氧化碳和水。此外,该实验的设计使学生将所学到的理论基础知识充分地运用于科学研究上,进而培养学生对化学的兴趣。

摘要：通过对红古北山泥石流群的形成条件、发育特征的研究,阐述了矿区群发性泥石流灾害的特征及其放大效应,综合防治方案中指出对流域内建筑和生活垃圾、煤矸石堆以及上游大型滑坡先行断链治理,再针对泥石流群采取“拦挡+排导+防冲槛+附属工程”治理措施,防治效果良好,据此提出了矿区群发性泥石流防治建议,对矿区群发性泥石流防治实践具有重要的科学研究意义和实际应用价值。

摘要：通过在光催化的过程中光还原二元AgI/BiOBr复合物原位合成一种新型的三元AgI/Ag/BiOBr复合物.在可见光条件下(λ>420 nm),AgI/Ag/BiOBr光催化剂对偶氮染料甲基橙(MO)和无色苯酚的降解呈现出优异的降解效率分别高达94.8%和86.2%.光催化活性的增强主要归因于金属Ag在Z型AgI/Ag/BiOBr光催化剂充当电子迁移桥,不仅降低界面电子迁移阻力,而且加速光生载流子的分离和迁移.本研究不仅证明Ag作为电荷传输桥的应用,而且为设计和制备高效、稳定的光催化剂提供一条新的途径.

摘要：本文对克罗恩病早期治疗的新理念进行综述,总结其定义、临床获益与风险,并提出进一步研究的设计要素.

摘要：为解决大容量光伏电站的远距离并网问题,分析了光伏电站运行机理及两端MMC-HVDC系统的输电原理,设计了适用于光伏电站接入的MMC-HVDC启动控制策略,有效抑制了启动过程中的冲击电压,实现了光伏电站的可靠并网。基于RTLAB实时仿真平台建立了光伏发电系统经两端柔性直流输电系统并网模型,验证了算法的正确性。

摘要：本实验是针对本科生能力水平、结合光伏领域前沿设计的一个化学综合实验。本实验采用简单的旋涂法在导电玻璃表面制备CsPbBr_(3)钙钛矿薄膜材料,并创新性地将光探测器件的组装实验加入其中以研究CsPbBr_(3)薄膜的光电性能。学生可在实验过程中肉眼可见地观察到黄色的CsPbBr_(3)材料在紫外激光照射下发射出强烈的绿光,这一实验现象能够有效地激发学生兴趣。

摘要：目前我国由于城镇化建设飞速发展,大量污染地块必须在短时间内开发,导致了修复工程成本较高,甚至出现过度修复的现象。针对这一特点,本研究以某染料厂修复工程为例,重点讨论如何根据地块规划设计和地质条件制定控制性修复方案,缩短修复进度,控制修复成本,为类似的污染场地开发提供借鉴。