Metal-organic Framework-derived NiO/ZnO Composites for Photoelectrocatalytic Reduction of Cr(VI)

IF 3 4区化学 Q3 CHEMISTRY, PHYSICAL

ChemPhotoChem Pub Date : 2024-11-24 DOI:10.1002/cptc.202400091

Huayu Zhang, Jiejie Nan, Xiaoting Ning, Lianjiang Hu, Qian Shao, Jing Zhang, Zeinhom M. El-Bahy, Hua Qiu, Mohamed M. Ibrahim, Gaber A. M. Mersal, Ruixiang Ge, Zhanhu Guo

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Abstract

Ni/Zn-MOF composites with photoelectrocatalytic (PEC) performance for Cr(VI) reduction were prepared via hydrothermal method and calcinating method. The as-prepared NiO/ZnO composites exhibited uniform morphology. When being subjected to an external voltage of 0.7 V and irradiated with visible light for 120 min, the NiO/ZnO composite exhibited a Cr (VI) reduction efficiency of almost 100 %, outperforming ZnO and NiO counterparts. The effects of the content of NiO to ZnO and different calcination temperatures on PEC performance were also investigated. Additionally, elimination experiments results indicated that photo-generated electrons (e⁻) play a crucial role in the catalytic reduction of Cr(VI). The notable enhancement in the photoelectrocatalytic performance can be credited to the applied bias voltage and the formation of a p-n heterojunction between NiO and ZnO. Consequently, the NiO/ZnO nanocomposites exhibit significant potential for the PEC reduction of Cr(VI). This capability underscores the promise of NiO/ZnO nanocomposites for applications in the photoelectrocatalytic reduction of Cr(VI) and related environmental remediation processes.

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金属-有机骨架衍生NiO/ZnO复合材料的光电催化还原Cr（VI）

采用水热法和煅烧法制备了具有光电催化还原Cr（VI）性能的Ni/Zn-MOF复合材料。制备的NiO/ZnO复合材料形貌均匀。当外部电压为0.7 V并在可见光下照射120 min时，NiO/ZnO复合材料的Cr （VI）还原效率接近100%，优于ZnO和NiO复合材料。研究了氧化锌中NiO的含量和不同的煅烧温度对PEC性能的影响。此外，消去实验结果表明，光生电子（e−）在Cr（VI）的催化还原中起着至关重要的作用。光电催化性能的显著提高可归功于施加的偏置电压和NiO和ZnO之间形成的p-n异质结。因此，NiO/ZnO纳米复合材料具有显著的PEC还原Cr（VI）的潜力。这种能力强调了NiO/ZnO纳米复合材料在光电催化还原Cr（VI）和相关环境修复过程中的应用前景。

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来源期刊

ChemPhotoChem Chemistry-Physical and Theoretical Chemistry

CiteScore

5.80

自引率

5.40%

发文量

165

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