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氟和氧化石墨烯共掺杂TiO2紫外光催化去除水中布洛芬的研究
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作者 李佳容 陈庆华 张燕 《科技通报》 2020年第4期120-124,135,共6页
布洛芬是目前地表水、地下水及饮用水等多种水体中频繁检出的新兴有机污染物。本文采用一步水热法制备了氟和氧化石墨烯共掺杂TiO2光催化剂(FGT),探究了其在紫外光照射条件下降解水体中布洛芬的效能及影响因素,并通过液相色谱质谱联用技... 布洛芬是目前地表水、地下水及饮用水等多种水体中频繁检出的新兴有机污染物。本文采用一步水热法制备了氟和氧化石墨烯共掺杂TiO2光催化剂(FGT),探究了其在紫外光照射条件下降解水体中布洛芬的效能及影响因素,并通过液相色谱质谱联用技术(LC-MS)对布洛芬降解过程中生成的中间产物进行了分析并推断其降解路径。结果表明,在催化剂投量0.05 g/L,pH为5.2的条件下,在0.1~10 mg/L的初始布洛芬浓度范围内,布洛芬的降解效能随着其初始浓度的增大而降低,100μg/L布洛芬约10 min即可完全降解;在0.025~0.1 g/L的催化剂投量范围内,催化剂最佳投量为0.05 g/L;且其在酸性及弱酸环境下的降解速率高于碱性环境;布洛芬在FGT紫外光催化降解过程中主要产生脱羧产物和羟基化产物。 展开更多
关键词 布洛芬 共掺杂光催化剂 光催化 降解路径
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Preparation, Characterization, Photocatalytic Activity of S and Ag co-Doped Mesoporous Titania Photocatalysts
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作者 姚淑华 郑志慧 +1 位作者 陈爽 石中亮 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2014年第6期732-738,I0004,共8页
In order to improve the photocatalytic performance of mesoporous titania under visible light, a series of photocatalysts of S and Ag co-doped mesoporous titania have been successfully prepared by template method using... In order to improve the photocatalytic performance of mesoporous titania under visible light, a series of photocatalysts of S and Ag co-doped mesoporous titania have been successfully prepared by template method using thiourea, AgNO3 and tetrabutyl titanate as precursors and Pluronic P123 (EO20PO70EO20) as template. Scanning electron microscopy (SEM), X-ray diffraction (XRD), nitrogen adsorption-desorption measurements, and UV-visible spectroscopy (UV-Vis) were employed to characterize the morphology, crystal structure, surface structure, and optical absorption properties of the samples. The microcrystal of the photocatalysts consisted of anatase phase and was approximately present in the form of spherical particle. The photocatalytic performance was studied by photodegradation methyl orange (MO) in water under UV and visible light irradiation. The calcination temperature and the doping content influenced the photoactivity. In addition, the possibility of cyclic usage of co-doped mesoporous titania was also confirmed, the photocatalytic activity of mesoporous titania remained above 89% of that of the fresh sample after being used four times. It was shown that the co-doped mesoporous titania could be activated by visible light and could thus be potentially applied for the treatment of water contaminated by organic pollutants. The synergistic effect of sulfur and silver co-doping played an important role in improving the photocatalytic activity. 展开更多
关键词 Mesoporous titania S and Ag co-doping Doped catalyst Photocatalytic activity Template method Dye decomposition
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Effects of Ni doping contents on photocatalytic activity of B-BiVO_4 synthesized through sol-gel and impregnation two-step method 被引量:10
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作者 Min WANG Guang-jun YANG +4 位作者 Mei-yan YOU Yuan-hua XIE You-zhao WANG Jin HAN Tong ZHU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2017年第9期2022-2030,共9页
To enhance the photocatalytic activity of B-BiVO4,Ni-doped B?BiVO4photocatalyst(Ni-B-BiVO4)was synthesized through sol-gel and impregnation method.The photocatalysts were characterized by XPS,XRD,SEM,EDS,BET and UV-Vi... To enhance the photocatalytic activity of B-BiVO4,Ni-doped B?BiVO4photocatalyst(Ni-B-BiVO4)was synthesized through sol-gel and impregnation method.The photocatalysts were characterized by XPS,XRD,SEM,EDS,BET and UV-Vis DRS techniques.The results showed that single or double doping did not change the crystalline structure and morphology,but the particle size decreased with Ni doping.The band gap energy absorption edge of Ni-B-BiVO4shifted to a longer wavelength compared with undoped,B or Ni single doped BiVO4.More V4+and surface hydroxyl oxygen were observed in BiVO4after Ni-B co-doping.When the optimal mass fraction of Ni is0.30%,the degradation rate of MO in50min is95%for0.3Ni-B-BiVO4sample which also can effectively degrade methyl blue(MB),acid orange(AOII)II and rhodamine B(RhB).The enhanced photocatalytic activity is attributed to the synergistic effects of B and Ni doping. 展开更多
关键词 CO-DOPING Ni doping BIVO4 PHOTOCATALYST sol.gel method impregnation method
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