Enhanced photoelectrochemical water splitting, and photocatalytic and piezo-photocatalytic pollutant removal performance over CdS/g-C3N4/ZnO ternary heterojunctions

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2024-08-23 DOI:10.1016/j.materresbull.2024.113063

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Abstract

Fromation of CdS/g-C₃N₄/ZnO (CdCN/Z) ternary composites for the water splitting application is reported here. Produced materials were studied for physicochemical, optical, photo-electrochemical (PEC) and photocatalytic pollutant degradation properties. The current density of CdCN/Z exhibited as 7.4 mA/cm² which is 26.4, 21.7, 14.25, and 5.92 folds higher than g-C₃N₄ (CNU), ZnO (Z), CdS, and CNU/Z, respectively. Additionally, the CdCN/Z composite achieved a higher photon-to-hydrogen conversion efficiency of 0.8 %. The finale composite exhibited a effectual degradation of RhB (99 % in 45 min) in water under light and ultrasonication exposure. The coupling of CNU/Z with CdS promoted the optical absorbance in the longer wavelength. This configuration had facilitated the enhanced photogenerated charge carriers separation. The contemporary work validates that the prepared CdCN/Z heterojunction is an auspicious photocatalyst for effectual water splitting as well as photocatalytic elimination of dye pollutants.

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增强 CdS/g-C3N4/ZnO 三元异质结的光电化学水分离、光催化和压强光催化污染物去除性能

本文报告了用于水分离应用的 CdS/g-C3N4/ZnO (CdCN/Z) 三元复合材料的制备情况。对制备的材料进行了物理化学、光学、光电化学（PEC）和光催化污染物降解性能的研究。CdCN/Z 的电流密度为 7.4 mA/cm2，分别比 g-C3N4 (CNU)、ZnO (Z)、CdS 和 CNU/Z 高 26.4、21.7、14.25 和 5.92 倍。此外，CdCN/Z 复合材料的光-氢转换效率更高，达到 0.8%。在光照和超声暴露条件下，压轴复合材料在水中可有效降解 RhB（45 分钟内降解 99%）。CNU/Z 与 CdS 的耦合提高了长波长的光吸收率。这种配置有利于增强光生电荷载流子的分离。当代研究工作证明，所制备的 CdCN/Z 异质结是一种良好的光催化剂，可有效地进行水分离以及光催化消除染料污染物。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.