C-doped TiO₂ photocatalyst synthesized using a one-step sol-microwave method with microcrystalline cellulose as the carbon source to achieve TiO₂ of desirable visible light absorption, cluster size, surface area and band gap was applied in the photocatalytic oxidation of glycerol under visible light to produce value-added chemicals, for the first time. An increase in microwave irradiation time from 0 to 20 min reduced the anatase crystal size but increased the surface area, pore volume and pore radius. Carbon coupled with microwave treatment produced Ti³⁺ and oxygen vacancies in the TiO₂ lattice of the C-doped TiO₂ which yielded improved performance of the photocatalysts. For example, a cellulose loading at 10% (i.e. 10%Cel-TiO₂(4-MW)) provided the highest photo-conversion of glycerol (67.5%) and highest yields of glyceraldehyde (10.0%), dihydroxyacetone (7.4%), formic acid (49.0%) and acetic acid (1.8%). On the other hand, excess residual carbon on TiO₂ surface (e.g. 20%Cel-TiO₂(0-MW)) retarded the activity of the photocatalyst.

采用一步法溶胶-微波法合成微晶纤维素为碳源的碳掺杂TiO ₂光催化剂，实现了理想的可见光吸收，团簇尺寸，表面积和带隙的TiO ₂的光催化氧化。可见光首次产生增值化学品。微波辐射时间从0到20分钟的增加会减小锐钛矿晶体的尺寸，但会增加表面积，孔体积和孔半径。碳加上微波处理会在C掺杂的TiO ₂的TiO ₂晶格中产生Ti ³⁺和氧空位从而提高了光催化剂的性能。例如，纤维素含量为10％（即10％Cel-TiO ₂（4-MW））提供了最高的甘油光转化率（67.5％）和最高的甘油醛收率（10.0％），二羟基丙酮（7.4％） ，甲酸（49.0％）和乙酸（1.8％）。另一方面，TiO ₂表面上过量的残留碳（例如20％Cel-TiO ₂（0-MW））阻碍了光催化剂的活性。