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首页> 外文期刊>RSC Advances >TiO2 Co-doped with Zr and Ag shows highly efficient visible light photocatalytic behavior suitable for treatment of polluted water
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TiO2 Co-doped with Zr and Ag shows highly efficient visible light photocatalytic behavior suitable for treatment of polluted water

机译：TiO2共掺杂Zr和Ag显示出高效的可见光光催化行为，适合治疗污染的水

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The objective of this study is to analyze the effects of zirconium (Zr) and silver (Ag) doping on the photoactivity of titania (TiO _(2) ). Zr–Ag (ZA) co-doped TiO _(2) products were fabricated via sol–gel technique and their properties (structural and chemical) were characterized. The weight ratio of TiO _(2) was fixed, while weight ratios of Zr and Ag were varied from 2 to 4, 6 and 8 wt% while synthesized samples were calcined at 400 °C for 3 h. The XRD results demonstrated that the incorporation of metal doping agents failed to alter the host material's lattice structure, however, its crystallite size was reduced from 13.54 to 5.05 nm with increasing Zr ~(4+) and Ag ~(+) concentrations. FTIR spectroscopy was used to examine various functional groups. In the attained spectra, an ample absorption peak between 500 and 1000 cm ~(?1) was recorded, which was ascribed to Ti–O–Ti linkage vibration mode present within TiO _(2) . Surface morphology, microstructure, SAED patterns and elemental composition were examined with FE-SEM, HR-TEM and EDX, which served to confirm the ZA-doped TiO _(2) product. Band gap energy of the co-doped material was significantly reduced as indicated by a higher wavelength redshift in the spectra. The photoactivity and kinetics of photo-products were investigated by observing photo-decolorization of methylene blue (MB) under a radiation source. Photodecomposition of MB was dramatically enhanced when titania co-doped with Zr and Ag was employed compared to un-doped or mono-doped TiO _(2) . The ZA (8 wt%) co-doped TiO _(2) photocatalyst depicted the maximum MB removal efficiency (～93%) within 90 min under a light source.
机译：本研究的目的是分析锆（Zr）和银（Ag）掺杂对二氧化钛的光度的影响（TiO _（2））的影响。通过溶胶 - 凝胶技术制造Zr-Ag（Za）共掺杂的TiO _（2）产物，其性质（结构和化学品）的特征在于。固定TiO _（2）的重量比，而Zr和Ag的重量比在2至4,6和8wt％中变化，而合成样品在400℃下煅烧3小时。 XRD结果表明，金属掺杂剂的掺入未能改变宿主材料的晶格结构，然而，其微晶尺寸从13.54〜5.05nm降低，随着Zr〜（4+）和Ag〜（+）浓度增加。使用FTIR光谱检查各种官能团。在达到的光谱中，记录了500至1000cm〜（α1）之间的额外吸收峰，其归因于TiO _（2）内存在的Ti-O-Ti键振动模式。用Fe-SEM，HR-TEM和EDX检查表面形态，微观结构，起草图案和元素组合物，用于确认ZA掺杂TiO _（2）产物。如光谱中的更高波长红移所示，共掺杂材料的带间隙能量显着降低。通过在辐射源下观察亚甲基蓝（MB）的光脱色来研究光产物的光接收和动力学。与未掺杂或单掺杂的TiO _（2）相比，使用用Zr和Ag的二氧化钛进行显着增强MB的光沉淀。 Za（8wt％）共掺杂的TiO _（2）光催化剂在光源下在90分钟内描绘了最大MB去除效率（〜93％）。

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