ZrO_(2)-CNB复合光催化剂的制备及其性能研究  

Preparation and performance for ZrO_(2)-CNB composite photocatalysts

作　　者：陈卫 胡文丽 崔玉民 CHEN Wei;HU Wenli;CUI Yumin(School of Primary Education,Fuyang Preschool Teachers College,Fuyang 236015,China;School of Chemical and Material Engineering,Fuyang Normal University,Fuyang 236037,China)

机构地区：[1]阜阳幼儿师范高等专科学校小学教育学院,安徽阜阳236015 [2]阜阳师范大学化学与材料工程学院,安徽阜阳236037

出　　处：《工业水处理》2023年第7期113-119,共7页Industrial Water Treatment

基　　金：安徽省高校自然科学研究重点项目(KJ2021A1571,KJ2021A1572,2022AH052989);安徽省教学研究重点项目(2021jyxm1125,2020jyxm1426)。

摘　　要：以四苯基硼化钠和尿素作为原料,通过热聚合法,利用热诱导前驱体发生缩聚反应,合成硼掺杂石墨相氮化碳(CNB)。然后,将ZrO_(2)与CNB混合均匀,通过煅烧法制备了不同ZrO_(2)含量的复合光催化剂ZrO_(2)-CNB。以甲基橙作为降解目标化合物,探究了ZrO_(2)-CNB的紫外光催化性能,并通过加入各种自由基清除剂,考察了在紫外光照射条件下光催化反应体系中生成的活性物种。研究表明:在所制备的复合光催化剂ZrO_(2)-CNB中,含有质量分数为0.75%的ZrO_(2)的ZrO_(2)-CNB催化剂具有最高的紫外光催化性能;在优化实验条件下,当用紫外光照射反应体系80 min时,以其为催化剂的光催化降解体系对甲基橙的降解率高达85%。ZrO_(2)-CNB光催化反应机制表明,h^(+)和·OH在光催化降解甲基橙反应体系中起到显著作用,特别是h^(+)在光催化降解反应过程中起到最主要的作用。Using tetraphenyl boron sodium and urea as raw materials and thermally induced precursor condensation reaction,the boron doped graphitic carbon nitride(CNB)was synthesized by thermal polymerization.Then,the composite photocatalysts of ZrO2-CNB with different contents of ZrO_(2) were prepared by calcination method after ZrO2 and CNB were mixed evenly.Using methyl orange as degradation target compound,the UV photocatalytic per⁃formances of ZrO_(2)-CNB were investigated.The active species formed in the photocatalytic reaction system under UV light irradiation were investigated by adding various free radical scavengers.The results showed that the ZrO_(2)-CNB catalyst with the ZrO_(2) mass fraction 0.75% had the highest UV photocatalytic performance among the prepared composite photocatalysts of ZrO_(2)-CNB.Under the optimized experimental conditions,when the reaction system was irradiated with UV light for 80 min,the photocatalytic degradation rate of methyl orange reached up to 85% by the catalyst.The study on the photocatalytic reaction mechanism of ZrO_(2)-CNB showed that h+and·OH played a signifi⁃cant role in the photocatalytic degradation of methyl orange,especially h+played the most important role in the pho⁃tocatalytic degradation reaction process.

关 键 词：尿素 四苯基硼化钠 二氧化锆 硼掺杂石墨相氮化碳 甲基橙 光催化 

分 类 号：O643[理学—物理化学] X703.1[理学—化学]