文章主要探讨弱恒定电场对铁氮共掺二氧化钛纳米颗粒光催化灭活HL60细胞实验的影响以及其机理。利用细胞计数法、CCK-8法检测、倒置显微镜、活性氧检测和荧光光谱等手段进行了分析研究,结果表明,在无电场作用下,此纳米颗粒光催化灭活HL6...文章主要探讨弱恒定电场对铁氮共掺二氧化钛纳米颗粒光催化灭活HL60细胞实验的影响以及其机理。利用细胞计数法、CCK-8法检测、倒置显微镜、活性氧检测和荧光光谱等手段进行了分析研究,结果表明,在无电场作用下,此纳米颗粒光催化灭活HL60细胞的效率达到75.07%,然而在弱恒定电场的作用下,其效率将提高,在场强为600 m V/mm的电场作用下,其效率可达到80.13%,同时,对细胞膜的损伤程度也更大,产生的活性氧类物质也更多;荧光光谱分析推测,电场可能通过分离光生空穴电子对和提供能量给价带电子跃迁来使更多空穴和电子被利用,进而提高此纳米颗粒的光催化活性。展开更多
The yellowish nitrogen and iron co-doped nanocrystalline titanium dioxide ((Fe,N) co-doped TiO2) powders have been prepared by hydrothermal method using TiOSO4 and CO(NH2)2 as starting materials.The grain size of the ...The yellowish nitrogen and iron co-doped nanocrystalline titanium dioxide ((Fe,N) co-doped TiO2) powders have been prepared by hydrothermal method using TiOSO4 and CO(NH2)2 as starting materials.The grain size of the synthesized powders was estimated as 11 nm by Scherrer's method.The UV-Vis diffuse reflectance spectra indicated that the light absorption edge of the powders was red-shifted up to 605 nm.And the doped TiO2 powders exhibited good photocatalytic activities during the photo-degradation of coking wastewater under sunshine irradiation.The biotreatability of the coking wasterwater after photocatalytic degradation was improved greatly and it is more suitable to be further treated by biochemical method.展开更多
文摘文章主要探讨弱恒定电场对铁氮共掺二氧化钛纳米颗粒光催化灭活HL60细胞实验的影响以及其机理。利用细胞计数法、CCK-8法检测、倒置显微镜、活性氧检测和荧光光谱等手段进行了分析研究,结果表明,在无电场作用下,此纳米颗粒光催化灭活HL60细胞的效率达到75.07%,然而在弱恒定电场的作用下,其效率将提高,在场强为600 m V/mm的电场作用下,其效率可达到80.13%,同时,对细胞膜的损伤程度也更大,产生的活性氧类物质也更多;荧光光谱分析推测,电场可能通过分离光生空穴电子对和提供能量给价带电子跃迁来使更多空穴和电子被利用,进而提高此纳米颗粒的光催化活性。
基金support by the National Natural Science Foundation of China (Grant No. 50772014)the Program for New Century Excellent Talents in Universities (Grant No. NCET-07-0064)
文摘The yellowish nitrogen and iron co-doped nanocrystalline titanium dioxide ((Fe,N) co-doped TiO2) powders have been prepared by hydrothermal method using TiOSO4 and CO(NH2)2 as starting materials.The grain size of the synthesized powders was estimated as 11 nm by Scherrer's method.The UV-Vis diffuse reflectance spectra indicated that the light absorption edge of the powders was red-shifted up to 605 nm.And the doped TiO2 powders exhibited good photocatalytic activities during the photo-degradation of coking wastewater under sunshine irradiation.The biotreatability of the coking wasterwater after photocatalytic degradation was improved greatly and it is more suitable to be further treated by biochemical method.
