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Fabrication of novel ternary heterojunctions of Pd/g-C3N4/Bi2MoO6 hollow microspheres for enhanced visible-light photocatalytic performance toward organic pollutant degradation
Separation and Purification Technology ( IF 8.1 ) Pub Date : 2018-09-21 , DOI: 10.1016/j.seppur.2018.09.061
Min Wang , Yu Zhang , Chongyue Jin , Zhilin Li , Tianyu Chai , Tong Zhu

To improve the photocatalytic performance of Bi2MoO6, novel ternary heterojunctions of Pd/g-C3N4/Bi2MoO6 (Pd/CN/BMO) hollow microspheres were fabricated through g-C3N4 coupling via solvothermal precipitation-calcination and metallic Pd deposition by photoreduction method. The optimal ternary 2Pd/10CN/BMO photocatalyst exhibited the highest photocatalytic efficiency towards Rhodamine B (RhB) degradation with a degradation rate of 97% under 40 min visible light irradiation, 77%, 61% and 18% higher than that of the single BMO (20%), binary 2Pd/10CN (61%) and 10CN/BMO (79%), respectively. The enhanced photocatalytic performance was mainly ascribed to the synergetic effect of heterojunction structures between g-C3N4 and Bi2MoO6 and the surface plasmon resonance (SPR) effect of Pd doping, resulting in the better optical absorption ability and lower combination rate of photogenerated charge carriers. Additionally, the 2Pd/10CN/BMO composite presented excellent photo-stability in recycling experiments. The trapping experiments demonstrated that the O2, h+ and OH were separately the dominant, minor and the least important reactive species toward RhB degradation.



中文翻译:

新型Pd / gC 3 N 4 / Bi 2 MoO 6中空微球三元异质结的制备,以提高可见光对有机污染物降解的光催化性能

为了提高Bi 2 MoO 6的光催化性能,通过gC 3 N 4制备了新型的Pd / gC 3 N 4 / Bi 2 MoO 6(Pd / CN / BMO)中空微球三元异质结。溶剂热沉淀-煅烧和光还原法沉积金属Pd的偶合 最佳三元2Pd / 10CN / BMO光催化剂对罗丹明B(RhB)的降解表现出最高的光催化效率,在40分钟可见光照射下的降解率为97%,比单一BMO分别高77%,61%和18%。 (20%),二元2Pd / 10CN(61%)和10CN / BMO(79%)。增强的光催化性能主要归因于gC 3 N 4与Bi 2 MoO 6之间异质结结构的协同作用。Pd掺杂的表面等离振子共振(SPR)效应,导致更好的光吸收能力和较低的光生载流子结合率。此外,2Pd / 10CN / BMO复合材料在回收实验中表现出出色的光稳定性。陷印实验表明,ø 2 -,H +OH产物中单独的主导,次要和朝向罗丹明B降解最不重要的反应性物种。

更新日期:2018-09-21
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