Ordered mesoporous carbon-based titania as a reusable adsorbent-catalyst for removing phenol from water

The high efficiency of ordered mesoporous carbon-based anatase for the visible light-driven photo-degradation of phenol in water is reported. Adsorption-photocatalysis cycles were used to treat polluted water. Contaminated water containing 200 mg/L phenol can be completely mineralized within 10 cycles, in which each cycle consisted of adsorption for 8 h and visible light-driven illumination for 8 h. The roles of non-metal doping in the anatase lattice, aggregation-free confinement of anatase nanoparticles by the carbon pore wall, and adsorption of phenol in the mesopores on the catalytic performance are discussed. The present work provides an effective combination of physical and chemical treatments to remove relatively high concentrations of non-biodegradable organic substances using a mesoporous photocatalyst.

摘要制备了有序介孔碳-氧化钛吸附-光催化剂, 利用可见光高效降解水中苯酚. 为去除水中高浓度苯酚, 设计了吸附-光催化循环, 即暗条件吸附8 h, 分离催化剂和将固体催化剂置于可见光下辐照8 h. 经过10次循环, 水中高浓度苯酚(200 mg/L)几乎可被完全降解. 详细讨论了TiO2晶格中非金属掺杂/介孔碳壁对TiO2纳米颗粒聚集的阻抑作用/介孔孔道吸附苯酚性能等因素对吸附-光催化剂性能的影响. 有序介孔碳-氧化钛复合体有效地结合了物理吸附和光化学降解技术, 有望用于降解水中难生物降解的高浓度有机污染物.

Graphical AbstractAn effective combination of adsorption and visible light–driven photocatalysis to remove high concentration phenol using mesoporous carbon–anatase is described.Figure optionsDownload as PowerPoint slide