Effect of Aging Time on the Characteristics and Photocatalysis of Zn2+-Doped CTAB@BiOCl

Abstract

Zn 2þ -doped CTAB@BiOCl inorganic-organic composites were prepared by a co-precipitation method with di®erent aging periods. The results show that the aging period has great in°uence on the structure, morphology and surface area of Zn 2þ -doped CTAB@BiOCl. The as-synthesized samples tend to form lamellar stacking structure with the increase of the aging time. In addition, the surface area and pore size distribution of samples decrease with the aging period from 0 h to 48 h and then increase from 48 h to 96 h. Besides, the content of CTAB in these composites increases along with the aging period from 0 h to 3 h and then decreases from 3 h to 96 h. Their photocatalytic performances were evaluated by the degradation of Reactive Red 3 (X3B) under UV light irradiation. It is found that the photocatalytic performance of composites increases with the prolonging of the aging time, and 100 mg/L of X3B solution can be almost completely degraded within 16 min by S 96 . Moreover, the possible formation mechanism has been proposed and discussed in detail. The work can provide a new sight for broadening the application of co-precipitation in the preparation of nanomaterials and for in-situ one-step synthesis of inorganic-organic composites.

Carboxylated Carbon Species Sensitized Nano-TiO2 for Full Visible-Light-Driven Photocatalysis

“…The absorption bands at 1570 and 1455 cm –1 are attributed to the antisymmetric and symmetric stretching vibrations of the coordinated carboxyl group on the TiO 2 surface, which is direct evidence for the presence of CCS. The absorption bands at 1380 cm –1 , 1130 cm –1 , and 1045 cm –1 correspond to the bending vibration of methyl groups, the C–O stretching vibration of ethanol, and the hydroxyl stretching vibration of ethanol, respectively.…”

Facile synthesis of multi-type carbon doped and modified nano-TiO2 for enhanced visible-light photocatalysis

“…41,42 The characteristic absorption bands at 1090 cm À1 and 1050 cm À1 are attributed to the stretching vibration absorption of the ethanol C-OH bond. [43][44][45] In addition, the characteristic absorption band at 1700 cm À1 should be attributed to the carbonyl stretching vibration of the carboxylic acid dimer. [46][47][48][49][50] The characteristic absorption bands at 1582 cm À1 and 1440 cm À1 are attributed to the antisymmetric and symmetric stretching vibration of the coordinated carboxyl group on the surface of TiO 2 .…”

“…[46][47][48][49][50] The characteristic absorption bands at 1582 cm À1 and 1440 cm À1 are attributed to the antisymmetric and symmetric stretching vibration of the coordinated carboxyl group on the surface of TiO 2 . 43,44,51 The appearance of carboxylic acid is resulted from the oxidation of alcohol in the hydrothermal process and carbonization process. Similar results have been observed in our previous studies.…”