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Abstract：
A cellulose-based carbon aerogel (CTN) loaded with titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) was prepared using sol-gel, freeze-drying, and high-temperature carbonization methods. The formation of the sol-gel was carried out through a one-pot method using refining papermaking pulp, tetrabutyl titanate, and urea as raw materials and hectorite as a cross-linking and reinforcing agent. Due to the cross-linking ability of hectorite, the carbonized aerogel maintained a porous structure and had a large specific surface area with low density (0.0209 g/cm3). The analysis of XRD, XPS, and Raman spectra revealed that the titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) were uniformly distributed in the CTN, while TEM and SEM observations demonstrated the uniformly distributed three-dimensional porous structure of CTN. The photocatalytic activity of the CTN was determined according to its ability to degrade rhodamine B. The removal rate reached 89% under visible light after 120 min. In addition, the CTN was still stable after five reuse cycles. The proposed catalyst exhibits excellent photocatalytic performance under visible light conditions.
摘要：
使用溶胶-凝胶制备了负载有二氧化钛（TiO2）和石墨氮化碳（g-C3N4）的纤维素基碳气凝胶（CTN），冷冻干燥,和高温碳化方法。溶胶-凝胶的形成是通过使用精制造纸纸浆的一锅法进行的，钛酸四丁酯,和尿素为原料和锂蒙脱石为交联和增强剂。由于锂蒙脱石的交联能力，碳化气凝胶保持多孔结构并具有大的比表面积和低密度(0.0209g/cm3)。XRD分析,XPS,拉曼光谱表明，二氧化钛（TiO2）和石墨碳氮化物（g-C3N4）在CTN中均匀分布，TEM和SEM观察表明CTN具有均匀分布的三维多孔结构。根据CTN对罗丹明B的降解能力，测定了CTN的光催化活性。120min后，在可见光下的去除率达到89％。此外,CTN在5个循环后仍然稳定。所提出的催化剂在可见光条件下表现出优异的光催化性能。
