Facile synthesis of carbon quantum dots loaded with mesoporous g-C<sub>3</sub>N<sub>4</sub> for synergistic absorption and visible light photodegradation of fluoroquinolone antibiotics
efficient charge separation of the CQDs. The eradication of FQs followed the Langmuir–Hinshelwood (L–H) kinetic degradation model and absorption pseudo-second-order kinetic model, indicating that surface reactions and chemical sorption played significant roles during the photocatalysis process. The results of electron spin resonance (ESR) technology and reactive species (RSs) scavenging experiments revealed
迫切需要开发一种高效且有效的合成方法,以合成具有介孔gC 3 N 4(mpg-C 3 N 4 / CQDs)的碳量子点。在这里,开发了一种简便的策略,通过使用CQD,氰胺和二氧化硅胶体的混合物进行煅烧来合成mpg-C 3 N 4 / CQD。所获得的复合材料仍然保留了相当大的总表面积,可以提供更多的吸附位点。因此增强了氟喹诺酮类抗生素(FQs)的吸附能力。在可见光照射下,mpg-C 3 N 4/ CQDs对FQs的降解具有比本体gC 3 N 4或mpg-C 3 N 4更高的光催化活性。这种增强可能归因于mpg-C 3 N 4的高表面积,独特的上转换光致发光(PL)特性以及CQD的有效电荷分离。FQ的消除遵循了Langmuir-Hinshelwood(L-H)动力学降解模型和吸收伪二级动力学模型,这表明表面反应和化学吸附在光催化过程中起着重要作用。电子自旋共振(ESR)的技术和反应性物质(R
Nanopore enriched hollow carbon nitride nanospheres with extremely high visible-light photocatalytic activity in the degradation of aqueous contaminants of emerging concern
Nanopore enriched hollow carbon nitride nanospheres exhibit extremely high visible-light photocatalytic activity in the degradation of aqueous contaminants of emerging concern.
纳米孔富集的空心碳氮化物纳米球在降解新兴关注的水污染物方面表现出极高的可见光光催化活性。
Photoinduced C−F Bond Cleavage in Some Fluorinated 7-Amino-4-quinolone-3-carboxylic Acids
作者:E. Fasani、F. F. Barberis Negra、M. Mella、S. Monti、A. Albini
DOI:10.1021/jo982456t
日期:1999.7.1
defluorination inefficient; thus, ofloxacin, an 8-alkoxy derivative, is found to be rather photostable (Phi(dec) = 0.001) and reacts in part via a process different from defluorination (degradation of the N-alkyl side chain). With a 6,8-difluoro derivative, lomefloxacin, the reaction is more efficient (Phi = 0.55) and selective for position 8. Contrary to the previous cases, the aryl cation undergoes insertion