Chang Ken-Lin, Wang Xiao-Qin, Han Ye-Ju, Deng Hao, Liu Jing-Yong, Lin Yuan-Chung
School of Environmental Science and Engineering and Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 51006, China.
Institute of Environmental Engineering, National Sun Yat-Sen University, Kaohsiung 80424, Taiwan.
Materials (Basel). 2018 May 16;11(5):802. doi: 10.3390/ma11050802.
This work evaluated the effectiveness of rice straw pretreatment using a TiO₂/UV system in the presence of oxidants. The effects of TiO₂ concentrations, pH and photocatalysis time were investigated. Inorganic oxidants including H₂O K₂S₂O₈, and KIO₄ were added to further enhance the effect on enzymatic hydrolysis of rice straw. The TiO₂/UV/ H₂O₂ pretreatment showed a higher amount of released reducing sugar (8.88 ± 0.10 mg/mL, compared to 5.47 ± 0.03 mg/mL in untreated sample). Composition analyses of rice straw after the TiO₂/UV/H₂O₂ pretreatment showed partial lignin and hemicellulose removal. Moreover, structural features of untreated and pretreated rice straw were analyzed through FE-SEM, FT-IR, and XRD. This work suggests that H₂O₂ is an efficient addition for photocatalysis pretreatment of rice straw.
本研究评估了在氧化剂存在的情况下，使用TiO₂/UV系统对稻草进行预处理的效果。研究了TiO₂浓度、pH值和光催化时间的影响。添加了包括H₂O、K₂S₂O₈和KIO₄在内的无机氧化剂，以进一步增强对稻草酶水解的效果。TiO₂/UV/H₂O₂预处理显示出更高的还原糖释放量（8.88±0.10mg/mL，未处理样品为5.47±0.03mg/mL）。TiO₂/UV/H₂O₂预处理后的稻草成分分析表明，部分木质素和半纤维素被去除。此外，通过场发射扫描电子显微镜（FE-SEM）、傅里叶变换红外光谱（FT-IR）和X射线衍射（XRD）分析了未处理和预处理稻草的结构特征。本研究表明，H₂O₂是稻草光催化预处理的有效添加剂。
