二氧化钛/多孔氮化硼纳米片复合光催化剂的制备及其性能研究

Enhanced Photocatlytic Activity of Titanium Dioxide/porous Boron Nitride Nanosheets Composite Photocatalyst for Organic Pollutant Degradation

为了提高二氧化钛(TiO_(2))对水溶液中有机污染物的降解能力,本论文提出了一种以多孔氮化硼纳米片(BNNSs)为载体的新型复合光催化剂,即以BNNSs和TiO_(2)颗粒为原料,通过球磨法将TiO_(2)微/纳米颗粒负载在BNNSs上合成TiO_(2)/BNNSs复合光催化剂。通过光催化降解对比实验证实,相对于纯TiO_(2)微/纳米颗粒,TiO_(2)/BNNSs复合光催化剂对水溶液中的有机污染物的降解性能有明显的增强。在紫外光照射下,60min内TiO_(2)/BNNS复合光催化剂催化降解水溶液中有机污染物的99.2%。所得复合光催化剂优良的再生重复利用性能也被证实。此外,论文对利用BNNSs作为载体提高TiO_(2)光催化活性的机理进行了分析。

To improve the degradation ability of titanium dioxide(TiO_(2))for the organic pollutant in theaqueous solution,this paper proposes a novel composite photocatalyst supported by porous boron nitride nanosheets(BNNSs),in which TiO_(2) micron/nanoparticles are loaded on the BNNSs with the ball-milling method.The photocatalytic degradation experiment results reveal that,compared with the pure TiO_(2) micron/nanoparticles,TiO_(2)/BNNSs composite photocatalyst exhibits higher degradation performance for the organic pollutant in the aqueous solution.Deqradation rate of TiO_(2)/BNNSs can be as high as 99.2%in 60 min under the ultraviolet irradiation.The excellent regeneration and reuse performance of the composite photocatalyst is also confirmed.The use of BNNSs as supporter to improve TiO_(2) photocatalytic activity is also analyzed.