Alkali soluble lignin present in rice straw hydrolysis residue (RSHR) is subjected to photocatalytic treatment to study its degradation rates and production of different value-added oxygenated organic compounds. TiO₂ and ZnO are used as photocatalysts. ZnO could degrade lignin faster than TiO₂ in pseudo-first order photocatalytic degradation. The maximum observed photocatalytic lignin degradation is 83.4% using 2 g/L ZnO dose with pseudo-first order rate constant 0.1386 h⁻¹. Vanillin and 4-hydroxy benzaldehyde are the two important value-added products formed during photocatalysis. Both these compounds, themselves, are susceptible to photocatalytic degradation. Vanillin degradation followed pseudo-first order kinetics and the highest rate constant of 0.1415 h⁻¹ is achieved using 2 g/L ZnO as photocatalyst. While the degradation kinetics of 4-hydroxy benzaldehyde is pseudo-first order with TiO₂ and ZnO as a photocatalyst. Higher catalyst doses increased the reaction rate constant. With multiple reactions in operation, the concentration of both vanillin and 4-hydroxy benzaldehyde in the reaction mixture first increased, attained their maxima, and thereafter decreased. With 1 g/L TiO₂ as a photocatalyst, the maximum attained vanillin concentration is 22.4 mg/L after 7 h photocatalysis. Maximum attained vanillin concentration, after 8 h photocatalysis, is significantly higher at 51.2 mg/L when 2 g/L ZnO is used as a catalyst. 4-Hydroxy benzaldehyde is produced in lesser amounts. Its maximum observed concentration in the reaction mixture is 20.4 mg/L, obtained with 1.5 g/L TiO₂ after 10 h photocatalysis.

对稻草水解残渣（RSHR）中存在的碱溶性木质素进行光催化处理，以研究其降解速率和不同增值含氧有机化合物的产生。TiO ₂和ZnO用作光催化剂。在拟一级光催化降解中，ZnO可以比TiO ₂更快地降解木质素。使用2 g / L ZnO剂量和拟一级反应速率常数0.1386 h ^-1，观察到的最大光催化木质素降解率为83.4％。香兰素和4-羟基苯甲醛是光催化过程中形成的两个重要的增值产品。这两种化合物本身都易于光催化降解。香兰素降解遵循拟一级动力学，最高速率常数为0.1415 h使用2 g / L ZnO作为光催化剂可达到^-1。以TiO ₂和ZnO为光催化剂，4-羟基苯甲醛的降解动力学为拟一级反应。较高的催化剂剂量增加了反应速率常数。在进行多个反应的过程中，反应混合物中香兰素和4-羟基苯甲醛的浓度先增加，达到最大值，然后降低。含1 g / L TiO ₂作为光催化剂，经过7 h的光催化后，香兰素的最高浓度为22.4 mg / L。当使用2 g / L ZnO作为催化剂时，光催化8 h后，达到的最大香兰素浓度显着更高，为51.2 mg / L。4-羟基苯甲醛的生成量较少。在10 h的光催化作用下，用1.5 g / L TiO ₂获得的在反应混合物中的最大观测浓度为20.4 mg / L。