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High photodegradation and antibacterial activity of BN–Ag/TiO2 composite nanofibers under visible light†
New Journal of Chemistry ( IF 3.3 ) Pub Date : 2017-12-18 00:00:00 , DOI: 10.1039/c7nj03183a
M. Nasr 1, 2, 3, 4, 5 , L. Soussan 1, 2, 3, 4, 5 , R. Viter 6, 7, 8, 9 , C. Eid 10, 11, 12, 13, 14 , R. Habchi 10, 11, 12, 13, 14 , P. Miele 1, 2, 3, 4, 5 , M. Bechelany 1, 2, 3, 4, 5
Affiliation  

To develop material with good photocatalytic properties for organic compound degradation and bacterial removal, we produced Ag/TiO2 and BN–Ag/TiO2 composite nanofibers that included controlled amounts of boron nitride (BN) nanosheets and silver (Ag). After annealing at 500 °C under air, we used scanning electron microscopy, transmission electron microscopy, Brunauer–Emmet–Teller analysis, X-ray diffraction, energy-dispersive X-ray spectroscopy, Raman spectroscopy, UV-visible reflectance spectroscopy and room temperature photoluminescence to investigate the morphological, structural and optical properties of all samples. The photocatalytic tests using methylene blue under visible light, in repeated and long-term applications, showed that the photodegradation activity of BN(5 wt%)–Ag(3 wt%)/TiO2 composite nanofibers was 17.2 and 2.3 times higher than that of pure TiO2 and Ag(3 wt%)/TiO2 nanofibers, respectively. In antibacterial tests using Gram-negative Escherichia coli, 3 hours of incubation with BN(5 wt%)–Ag(3 wt%)/TiO2 composite nanofibers killed all bacteria. These results indicate that the synthesized BN(5 wt%)–Ag(3 wt%)/TiO2 composite nanofibers can be considered to be a multifunctional material for photodegradation and antibacterial applications.

中文翻译:

BN-Ag / TiO 2复合纳米纤维在可见光下的高光降解和抗菌活性

为了开发对有机化合物降解和细菌去除具有良好光催化性能的材料,我们生产了Ag / TiO 2和BN–Ag / TiO 2复合纳米纤维,其中包括受控量的氮化硼(BN)纳米片和银(Ag)。在空气中于500°C退火后,我们使用了扫描电子显微镜,透射电子显微镜,Brunauer–Emmet–Teller分析,X射线衍射,能量色散X射线光谱,拉曼光谱,紫外可见反射光谱和室温用光致发光来研究所有样品的形态,结构和光学性质。在重复和长期应用中,使用亚甲基蓝在可见光下的光催化测试表明,BN(5 wt%)-Ag(3 wt%)/ TiO 2复合纳米纤维的光降解活性分别是其的17.2和2.3倍。 TiO 2和Ag(3 wt%)/ TiO 2的合成纳米纤维。在使用革兰氏阴性大肠杆菌的抗菌测试,与BN(5 wt%)-Ag(3 wt%)/ TiO 2复合纳米纤维孵育3小时杀死了所有细菌。这些结果表明,合成的BN(5 wt%)– Ag(3 wt%)/ TiO 2复合纳米纤维可以被认为是用于光降解和抗菌应用的多功能材料。
更新日期:2017-12-18
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