caa a22 4500 606173331 CHVBK 20210128100732.0 cr unu---uuuuu 210128e20151001xx s 000 0 eng 10.1007/s11244-015-0478-6 doi (NATIONALLICENCE)springer-10.1007/s11244-015-0478-6 Microwave-Assisted Synthesis of BiOBr Microspheres for Photocatalytic Degradation of Tartaric Acids in Aqueous Solution [Elektronische Daten] [Chuan-Kai Yang, Selvaraj Naveenraj, Gang-Juan Lee, Jerry Wu] A facile one-pot microwave assisted solvothermal synthesis using various ratios of ethylene glycol (EG) and ethanol was developed to synthesize flower-like BiOBr microspheres. Such synthesized microspheres were characterized using X-ray photoelectron spectroscopy, X-ray diffraction, field emission scanning electron microscopy, high resolution transmission electron microscopy, the Brunauer-Emmett-Teller surface area, and UV-Visible diffuse reflectance spectra. Flower-like BiOBr microspheres were composed of loosely packed nanoplates which are interconnected to each other. Experimental results suggested that ethanol played a crucial role in directing the construction of microspheres without any misorientations. The photocatalytic activity of BiOBr microspheres was tested using the photodegradation of tartaric acid irradiated with visible light and compared with solvothermally synthesized BiOBr microspheres and commercial Bi2O3. BiOBr microspheres synthesized using the solvent mixture containing EG and ethanol at the ratio of 3:1 could degrade 98% tartaric acid in 240min with visible light (λ≥400nm) due to the synergistic effect of favorable microstructure with high surface area and suitable band gap of 2.92eV. Since the resulting BiOBr microspheres are reusable without any loss in photocatalytic activity and more stable without any change in their morphology, it holds as a very promising photocatalysts for the treatment of organic pollutants. Springer Science+Business Media New York, 2015 Microwave synthesis nationallicence Semiconductor photocatalyst nationallicence BiOBr nationallicence Visible light nationallicence Solvent effect nationallicence Yang Chuan-Kai Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut Naveenraj Selvaraj Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut Lee Gang-Juan Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut Wu Jerry Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut Topics in Catalysis Springer US; http://www.springer-ny.com 58/14-17(2015-10-01), 1100-1111 1022-5528 58:14-17<1100 2015 58 11244 https://doi.org/10.1007/s11244-015-0478-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11244-015-0478-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yang Chuan-Kai Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut NATIONALLICENCE 700 1- Naveenraj Selvaraj Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut NATIONALLICENCE 700 1- Lee Gang-Juan Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut NATIONALLICENCE 700 1- Wu Jerry Department of Environmental Engineering and Science, Feng Chia University, 407, Taichung, Taiwan aut NATIONALLICENCE 773 0- Topics in Catalysis Springer US; http://www.springer-ny.com 58/14-17(2015-10-01), 1100-1111 1022-5528 58:14-17<1100 2015 58 11244