Nanosized, well-dispersed titania particles were synthesized via a hydrothermal method using multiwalled carbon nanotubes (MWCNTs) as structural modifiers during the nucleation process to decrease aggregation. Synthesized TiO2/MWCNT composites containing different amounts of MWCNTs were characterized using N2 physisorption, XRD, spectroscopic techniques (Raman, UV-visible, and X-ray photoelectron), and electron microscopy to illuminate the morphology, crystal structure, and surface chemistry of the composites. Photocatalytic performance was evaluated by measuring the degradation of acetaldehyde in a batch reactor under UV illumination. Average rate constants decrease in the following order: TiO2/MWCNT-1% > TiO2 > TiO2/MWCNT-5%. Addition of MWCNTs beyond the optimum loading ratio of 1:100 (MWCNT:TiO2) diminishes the effectiveness of the photocatalyst and the synergistic effect between MWCNTs and TiO2. The primary mechanism for photocatalytic activity enhancement in TiO2/MWCNT-1% is thought to be due to increased porosity, hydroxyl enrichment on the surface, and high dispersion of TiO2 particles.

通过成核过程中使用多壁碳纳米管（MWCNT）作为结构改性剂的水热法合成了纳米尺寸，分散良好的二氧化钛颗粒。使用N 2物理吸附，XRD，光谱技术（拉曼光谱，紫外可见光和X射线光电子）和电子显微镜表征了包含不同量MWCNT的合成TiO 2 / MWCNT复合材料，以阐明其形态，晶体结构和表面化学性质复合材料。通过在间歇式反应器中在紫外线照射下测量乙醛的降解来评估光催化性能。平均速率常数按以下顺序降低：TiO 2 / MWCNT-1％> TiO 2 > TiO 2/ MWCNT-5％。超过最佳负载比1：100（MWCNT：TiO 2）的MWCNTs会降低光催化剂的有效性以及MWCNTs与TiO 2之间的协同效应。TiO 2 / MWCNT-1％中光催化活性增强的主要机理被认为是由于孔隙率的增加，表面羟基的富集以及TiO 2颗粒的高度分散。