Cu2O/CNs的制备及光-类Fenton氧化降解棉浆粕黑液性能  

Preparation of cellulose-based nanosheets and loading Cu2O fordegradation of cotton pulp black liquor byphotocatalytic Fenton-like reaction

作　　者：翟培帅 哈丽丹·买买提[1,2] 徐波 王世新 王瑶 ZHAI Peishuai;HALIDAN Maimaiti;XU Bo;WANG Shixin;WANG Yao(Institute of Chemistry and Chemical Industry,Xinjiang University,Urumqi 830046,Xinjiang,China;State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]新疆大学化学化工学院,乌鲁木齐830046 [2]大连理工大学精细化工重点实验室,大连116024

出　　处：《功能材料》2020年第10期10012-10020,共9页Journal of Functional Materials

基　　金：大连理工大学精细化工国家重点实验室基金资助项目(KF1808)。

摘　　要：纤维素基纳米材料的制备及其在类Fenton光催化氧化降解有机污染物方面的应用,既可促进纤维素的高附加值利用,又可深入类Fenton体系的研究,具有十分重要的学术和应用价值。本论文以微晶纤维素(MCC)为原料,通过混酸/超声法制得纤维素纳米片(CNs)后,利用棉纤维上羟基官能团的配位及分散作用,将由氯化铜还原而得的Cu2O纳米粒子原位负载至CNs表面,制备了一种具有较高催化活性的非均相类Fenton氧化试剂Cu2O/CNs,并在表征其结构的同时,通过考察Cu2O/CNs光催化H2O2氧化降解棉浆粕黑液性能,研究了Cu2O/CNs的光-类Fenton氧化机理。结果表明,Cu2O/CNs能有效地促进H2O2的还原而产生更多活性自由基,从而能取代Fe^2+/Fe^3+成为H2O2的活化剂;同时,因纤维素的三维多孔结构,Cu2O/CNs还可吸附废水中的部分污染物,双重作用的结果极大地促进了体系处理棉浆粕黑液的能力。The preparation of cellulose-based nanomaterials and their application in Fenton-like photocatalytic organic pollutant degradation can not only promote the high value-added utilization of cellulose,but also expand the research of Fenton-like system,it has very important academic and application value.In this paper,microcrystalline cellulose(MCC)was used as raw material to prepare cellulose nanosheets(CNs)by mixed acid/ultrasonic method,and then,the Cu2O nanoparticles obtained by reduction of copper chloride were loaded into the surface of CNs by in situ coordination and dispersion of hydroxyl functional groups on cotton fibers to prepare a heterogeneous Fenton oxidation reagent Cu2O/CNs with high catalytic activity.Meanwhile,the photocatalytic Fenton-like system was constructed with H2O2 and Cu2O/CNs.The property and mechanism of the photocatalytic Fenton-like oxidative degradation of cotton pulp black liquor was characterized in detail.The results show that Cu2O/CNs can effectively promote the reduction of H2O2 and produce more active radicals,which can replace Fe^2+/Fe^3+to become the activator of H2O2.At the same time,Cu2O/CNs can also adsorb wastewater due to the three-dimensional porous structure of cellulose.The double action results greatly contributed to the ability of the system to treat cotton pulp black liquor.

关 键 词：纤维素纳米片 类Fenton氧化降解 Cu 2O/CNs 棉浆粕黑液 

分 类 号：O649[理学—物理化学]