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首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Correlating the properties of hydrogenated titania to reaction kinetics and mechanism for the photocatalytic degradation of bisphenol A under solar irradiation
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Correlating the properties of hydrogenated titania to reaction kinetics and mechanism for the photocatalytic degradation of bisphenol A under solar irradiation

机译：氢化二氧化钛的性质与太阳光下双酚A光催化降解反应动力学及机理的关系

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摘要

Hydrogenation of a commercially available TiO2 anatase catalyst was carried out at several annealing temperatures in the range 400-800 degrees C to improve its photocatalytic activity for the degradation of endocrine disruptor bisphenol A (BPA) under simulated solar irradiation. The prepared hydrogenated catalysts, as well as their counterparts calcined in air were characterized with respect to their morphological, optical and electronic properties by means of BET, XRD, XPS, DRS and UPS analyses. Thermal treatment under flowing hydrogen resulted in increased absorption at wavelengths below 400 nm, as well as in the appearance of a broad and almost uniform absorption band in the visible region, the intensity of which increased with increase of annealing temperature. The latter was attributed to the creation of gap states in the hydrogenated samples, which was not observed for the samples calcined in air. Interestingly, sodium inherently present in the bulk of the pristine catalyst was found to diffuse at the surface and this was more pronounced for the hydrogenated samples prepared at temperatures above 700 degrees C.
机译：在400-800摄氏度范围内的几个退火温度下，对可商购的TiO2锐钛矿催化剂进行氢化，以提高其在模拟太阳辐射下降解内分泌干扰物双酚A（BPA）的光催化活性。通过BET，XRD，XPS，DRS和UPS分析，对制得的氢化催化剂以及在空气中煅烧的氢化催化剂及其形态，光学和电子性质进行表征。在流动的氢气中进行热处理会导致在低于400 nm的波长处吸收增加，并且在可见光区域出现宽而几乎均匀的吸收带，其强度随退火温度的升高而增加。后者归因于在氢化样品中产生的空位状态，这在空气中煅烧的样品中未观察到。有趣的是，发现原始催化剂主体中固有存在的钠会在表面扩散，这对于在高于700摄氏度的温度下制备的氢化样品而言更为明显。

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