采用3-氨丙基三乙氧基硅烷(APTES)对纳米碳化硼(B₄C)和二氧化钛(TiO₂)的混合颗粒进行改性,制备出功能化APTES-B₄C/TiO₂复合颗粒。利用相转化技术将APTES-B₄C-TiO₂复合颗粒引入聚偏氟乙烯(PVDF)膜基质中,得到具有光催化性能的APTES-B₄C-TiO₂/PVDF复合膜。通过XRD、SEM、EDS和水接触角测试对制备的复合膜进行表征。以50 mg/L的罗丹明B (RhB)水溶液模拟废水考察APTES-B₄C-TiO₂/PVDF复合膜的光催化性能。结果表明,当复合粒子的质量分数为0.5%时,复合膜具有最高的孔隙率(68.3%)、最大的膜比表面积(8.25 m²/g)和最低的水接触角(69°)。光催化实验结果表明,APTES-B₄C-TiO₂复合粒子的质量分数为0.5%时,APTES-B₄C-TiO₂/PVDF复合膜光催化性能最佳,对RhB的去除率达到82.92%,远高于纯膜的去除率(65.73%)。

Functionalized APTES-B₄C/TiO₂ composite particles are obtained by using 3-aminopropyltriethoxysilane (APTES) to modify the mixed particles of nano-boron carbide (B₄C) and titanium dioxide (TiO₂).APTES-B4C-TiO₂/PVDF composite membrane with photocatalytic properties are prepared by drawing APTES-B₄C-TiO₂ composite particles into polyvinylidene fluoride (PVDF) film matrix through phase inversion technology.The composite film is characterized by means of X-ray diffraction (XRD),scanning electron microscope (SEM),X-ray energy spectrum analysis (EDS),and water contact angle test.The photocatalytic performance of the prepared APTES-B₄C-TiO₂/PVDF composite membrane is evaluated by using a 50 mg·L^-1 rhodamine B aqueous solution to simulate wastewater.Experimental results show that the composite membrane has the highest porosity of 68.3%,the largest membrane specific surface area of 8.25 m²·g^-1 and the lowest water contact angle of 69° when 0.5 wt% of composite particles is added.Furthermore,the photocatalytic experiment results show that APTES-B₄C-TiO₂/PVDF composite membrane that contains 0.5 wt% of APTES-B₄C-TiO₂ composite particles has the maximum photocatalytic performance,by which the removal rate of rhodamine B reaches 82.92%,much higher than the 65.73% by the pure membrane.

欧阳园园(1997-),女,硕士研究生,主要从事光催化剂膜处理污水的研究,1556592732@qq.com