Journal
DALTON TRANSACTIONS
Volume 44, Issue 25, Pages 11321-11330Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5dt01168j
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Funding
- National Science Funds for Creative Research Groups of China [51421006]
- National Science Foundation of China for Excellent Young Scholars [51422902]
- Program for Changjiang Scholars and Innovative Research Team in the University [IRT13061]
- National Science Funds for Distinguished Young Scholars [51225901]
- Key Program of National Natural Science Foundation of China [41430751]
- National Natural Science Foundation of China [51479065]
- Natural Science Foundation of Jiangsu Province [BK20141417]
- Fundamental Research Funds for the Central Universities [2013B32114, 2013B14114]
- PAPD
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In this work, a series of novel flower-like Bi2O2CO3/CdS heterojunctions were prepared by a simple and feasible two-step process. The phase structures of as-prepared samples were examined by X-ray diffraction (XRD). Scanning electron microscopy (SEM), Transmission Electron Microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM) were used to confirm the flower-like heterostructures of the Bi2O2CO3/CdS composites. The Brunauer-Emmett-Teller (BET) specific surface area (S-BET) of samples were analyzed by N-2 adsorption-desorption isotherms. UV-vis diffuse reflectance spectrometry (DRS) revealed that Bi2O2CO3/CdS heterojunctions exhibited better light absorptive properties than pure Bi2O2CO3. The photocatalytic activity was investigated by the degradation of MB under visible light irradiation. The results showed that the as-prepared Bi2O2CO3/CdS heterojunctions exhibited much higher activity than pure Bi2O2CO3. The photoluminescence (PL) spectra and photocurrent studies indicated that the recombination of photogenerated electron-hole pairs was decreased effectively due to the formation of heterojunctions between flower- like Bi2O2CO3 and CdS nanoparticles. Trapping experiments indicated that O2- radicals were the main reactive species for MB degradation in the present photocatalytic system. Furthermore, the cycling experiments revealed the good stability of Bi2O2CO3-CdS composites.
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