TiO₂-carbonized medium-density fiberboard (TiO₂-cMDF), prepared by carbonization of MDF treated with 50% (v/v) titanium tetraisopropoxide (Ti-tip) in isopropyl alcohol (IPA) as a precursor, was investigated for adsorption and photodegradation in aqueous methylene blue (MB) solution under UV-C (254 nm) irradiation. After full adsorption of MB, four successive cycles of photodegradation were conducted. After the second cycle, the TiO₂-cMDF was rinsed with water, dried, and subjected to photodegradation again. For every photodegradation cycle, the TiO₂-cMDF practically removed MB. The photodegradation results of the second (unrinsed) and third (rinsed) cycle were similar, however, the result of the fourth (rinsed) cycle was lower than the third cycle. The rate constant of adsorption was 3.3 × 10^–3/h and followed pseudo-first-order kinetics. The rate constant of photodegradation decreased from 11.0 × 10^–3/h (first cycle) to 5.9 × 10^–3/h (fourth cycle) and likewise followed pseudo-first-order kinetics. A reduction in Ti content on the surface of TiO₂-cMDF was observed after photodegradation based on scanning electron microscope-energy dispersive X-ray spectrometer (SEM–EDS) analysis; nonetheless, photodegradation of MB was still accomplished. Although TiO₂-cMDF in aqueous system exhibited slow photodegradation, it is due to the limited number of TiO₂-cMDF slabs. The number of slabs must be increased to improve the photocatalytic performance.

研究了以异丙醇 (IPA) 中的 50% (v/v) 四异丙醇钛 (Ti-tip) 作为前驱体处理的 MDF 碳化制备的TiO _{2 -}碳化中密度纤维板 (TiO ₂ -cMDF) 的吸附性能在 UV-C (254 nm) 照射下在亚甲蓝 (MB) 水溶液中进行光降解。MB 完全吸附后，进行四次连续的光降解循环。在第二次循环后，TiO ₂ -cMDF 用水冲洗、干燥并再次进行光降解。对于每个光降解循环，TiO ₂-cMDF 实际上删除了 MB。第二次（未漂洗）和第三次（漂洗）循环的光降解结果相似，但第四次（漂洗）循环的结果低于第三次循环。吸附速率常数为 3.3 × 10 ^–3 /h 并遵循准一级动力学。光降解速率常数从 11.0 × 10 ^–3 /h（第一次循环）降低到 5.9 × 10 ^–3 /h（第四次循环），同样遵循准一级动力学。基于扫描电子显微镜-能量色散 X 射线光谱仪 (SEM-EDS) 分析，在光降解后观察到TiO ₂ -cMDF表面的 Ti 含量减少；尽管如此，仍然完成了 MB 的光降解。虽然 TiO ₂-cMDF 在水性体系中表现出缓慢的光降解，这是由于 TiO ₂ -cMDF 板的数量有限。必须增加板的数量以提高光催化性能。