非润湿碳化BiOBr蒸发器的构筑及其在清洁水生产中的应用

Construction of Non-Wetting Carbonized BiOBr and Its Application in Clean Water Production

半导体光催化剂已被广泛应用于溶解性污染物去除,但是对于漂浮的有机污染物却无能为力。为此,以碳化BiOBr光催化剂为载体,利用原位修饰策略在合成疏水碳化BiOBr的基础上,构筑了超疏水织物漂浮层(SF),对水的接触角达到了156.9°。SF层不仅具有光降解污染物能力,而且具有选择性吸附漂浮有机溶剂的能力。另外,碳化BiOBr作为光热转换层,嵌入琼脂气凝胶网络得到同时具备亲水和光热转换的气凝胶(AAG)。由SF层和AAG层组装的蒸发器,实现了1.95 kg·m^(-2)·h^(-1)的蒸汽产生速度。

Semiconductor photocatalysts have been widely used to remove soluble pollutants,but they can not be used for the removal of floating organic pollutants.Therefore,carbonized BiOBr photocatalysts were used as the carrier and the hydrophobic modification of the catalyst was achieved.Then,the superhydrophobic fabric floating layer(SF)was constructed,and the contact angle of water reached 156.9°.The SF layer not only had the ability to photodegrade pollutants,but also selectively adsorbed floating organic solvents.In addition,the carbonized BiOBr as a photothermal conversion layer was embedded in the agar aerogel network to obtain an aerogel(AAG)with the capacity of both hydrophilic and photothermal conversion.The evaporator containing SF and AAG layers achieved a steam generation rate of 1.95 kg·m^(-2)·h^(-1).