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首页> 外文期刊>Journal of Hazardous Materials >Photocatalytic Decolouration Of Orange Ii By Zno Active Layers Screen-printed On Ceramic Tiles
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Photocatalytic Decolouration Of Orange Ii By Zno Active Layers Screen-printed On Ceramic Tiles

机译：丝网印刷在瓷砖上的Zno活性层对橙Ii的光催化脱色

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In this work ZnO layers have been deposited by screen-printing in common ceramic tiles. These layers were characterized and tested for the photocatalytic degradation of the organic dye Orange II in aqueous solutions, using a batch photoreactor either under visible light provided by a Philips ML-160W lamp or under direct exposure to sunlight. For sake of comparison, ZnO suspensions have also been evaluated for similar reacting conditions. The influence of experimental parameters such as (ⅰ) firing temperature of the printed layer; (ⅱ) layer thickness; and (ⅲ) operation time have been investigated. Screen-printed ZnO layers obtained in optimal processing conditions showed photocatalytic activity comparable to aqueous ZnO suspensions. The maximal attenuation degree is over 70% and decolourisation rate, assuming that reaction kinetics follows a pseudo-first order rate law, is over 0.015 min~(-1). Thus these ZnO-layered ceramic tiles can be regarded as an alternative to photocatalytic suspensions of the same material with the advantage of avoiding the removal of the photocatalyst.
机译：在这项工作中，已经通过丝网印刷在普通瓷砖中沉积了ZnO层。使用批处理光反应器在飞利浦ML-160W灯提供的可见光下或直接暴露于阳光下，对这些层进行表征并测试有机染料Orange II在水溶液中的光催化降解。为了比较，还对相似反应条件下的ZnO悬浮液进行了评估。实验参数的影响，例如（ⅰ）印刷层的烧结温度； （ⅱ）层厚； （ⅲ）操作时间已被调查。在最佳工艺条件下获得的丝网印刷ZnO层显示出与ZnO水性悬浮液相当的光催化活性。假设反应动力学遵循伪一级速率定律，则最大衰减度超过70％，脱色率超过0.015 min〜（-1）。因此，这些具有ZnO层的瓷砖可以被视为相同材料的光催化悬浮液的替代物，其优点是避免了光催化剂的去除。

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