【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。
【无机化学学报】doi: 10.11862/CJIC.20250052
在溶剂热条件下,利用设计合成的对映纯手性配体S-4'-[(2-羧基-5-氧代吡咯烷-1-基)甲基]-(1,1'-联苯基)-3,5-二甲酸(H3L)和Eu(Ⅲ)盐反应成功得到了一个新的同手性配位聚合物{[Eu (L)]·0.5CH3CN}n (1)。单晶X射线衍射分析显示,配合物1结晶于四方晶系I41手性空间群。在1中,配体阴离子L3-为七桥联配体,联结Eu(Ⅲ)离子形成7-连接的3D螺旋结构。配体H3L不仅把手性传递给金属有机框架,并诱导产生了螺旋手性。1具有优良的配体敏化发光和热稳定性。以配合物1为荧光探针,研究了其对常见氨基酸分子的构型识别性能。结果表明,天冬氨酸、丙氨酸、赖氨酸、亮氨酸、酪氨酸和缬氨酸这几种氨基酸的不同对映体对1的荧光强度的影响差异显著,配合物1可以对以上氨基酸的构型进行荧光识别检测。
【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。
【无机化学学报】doi: 10.11862/CJIC.20240275
使用菲咯啉官能化咪唑盐配体((HL) PF6,L=3-苄基-1-[2-(1, 10-菲咯啉)咪唑叶立德])分别合成了一个双核氮杂环卡宾(NHC)银配合物NHC-Ag2和一个异核的氮杂环卡宾银/金双金属配合物NHC-Ag/Au。通过NMR和元素分析对NHC前体和金属配合物进行了表征。单晶衍射分析表明,这2个配合物具有类似的结构,2个金属中心原子分别由2个配体的4个菲咯啉氮原子和2个卡宾碳原子配位,呈四面体和直线型构型。体外细胞毒性研究表明,配合物NHC-Ag2和NHC-Ag/Au具有比它们的前体咪唑盐配体和顺铂更强的抗癌活性。如在结肠癌LoVo细胞中,NHC-Ag2和NHC-Ag/Au的IC50值(半抑制浓度)分别为(5.6±0.3)μmol·L-1和(6.4±0.3)μmol·L-1,均优于顺铂的细胞毒性。机制研究表明,配合物NHC-Ag2和NHC-Ag/Au引起了LoVo细胞内线粒体膜电位变化和活性氧(ROS)的过度产生,最终导致细胞膜通透性增加和细胞死亡。
【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.
【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.