Controlled synthesis of Bi2O2CO3 nanorods with enhanced photocatalytic performance. Issue 20 (6th May 2021)

• Record Type: Journal Article
• Authors: Peng, Yin; Liu, Meng-Qi; Zhao, Nan-Nan; Kan, Peng-Fei
• Is Part Of: CrystEngComm. Volume 23:Issue 20(2021)
• Page Start: 3671
• Page End: 3680
• Publication Date: 2021-05-06
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/d1ce00242b
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Bi2 O2 CO3 nanorod is synthesized via solid–gas high temperature method and exhibits excellent photocatalytic activity for degrading salicylic acid. Abstract : Bi2 O2 CO3 nanorods are for the first time synthesized successfully via a solid–gas high temperature method. CO2 gas in our synthesis first replaces Na2 CO3 or urea which is usually used to synthesize Bi2 O2 CO3 in previous literature reports, and bismuth oxalate was used as the bismuth source and template. The optimum synthesis conditions of Bi2 O2 CO3 nanorods can be obtained by controlling the CO2 gas flow, the reaction temperature and the calcination time. The Bi2 O2 CO3 nanorods exhibit excellent photocatalytic activity, and their rate constant for degrading salicylic acid (SA) is 6 times that of Bi2 O2 CO3 nanosheets. This strengthened photocatalytic activity is attributed to their wider absorbance range, narrower facet band gap and up-shift VB potentials compared to those of Bi2 O2 CO3 nanosheets. The photoluminescence (PL) spectra and the electrochemical impedance indicate that the Bi2 O2 CO3 nanorods exhibit high separation efficiency and charge transfer efficiency of photogenerated electron–hole pairs.