Advancing physical, dielectric, and solar photocatalytic efficiency with novel Ni0.95Cu0.03M0.02O (M = Co, Mo) semiconductors

IF 3.5 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Science Pub Date : 2024-10-10 DOI:10.1007/s10853-024-10311-5

Imen Massoudi, Ahmed Rebey

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Abstract

Cu/Mo codoped NiO semiconductors exhibited a visible light efficient photo-removal performance for diclofenac sodium and methylene blue waste. A simple and low-cost methodology was used to synthesize NiO, Ni_0.95Cu_0.03Co_0.02O, and Ni_0.95Cu_0.03Mo_0.02O nanocatalysts. The crystal structure verified the formation of a cubic NiO single phase. The scanning electron microscopy (SEM) micrographs of all samples have shown a homogenous spherical particle distribution. The harvesting of visible light from NiO semiconductors was significantly enhanced after the addition of Cu/Co and Cu/Mo ions. The X-ray photoelectron spectra confirmed that Cu dopant has a +2-oxidation state while Mo dopant has +3 and +4 as mixed oxidation states. Ni_0.95Cu_0.03Co_0.02O and Ni_0.95Cu_0.03Mo_0.02O have shown high dielectric constant values at low frequencies. For purification of wastewater, the visible light photocatalytic efficiencies of Cu/Mo codoped NiO catalyst for the removal of 20 mg/L methylene blue (MB) and 20 mg/L diclofenac sodium (DS) were 98 and 95% after 50 min, respectively. The MB and DS molecules were converted to CO₂ and H₂O as confirmed by total organic carbon and chemical oxygen demand analyses. Besides, this nanocatalyst showed a high reusability for MB and DS pollutants until four cycles.

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利用新型 Ni0.95Cu0.03M0.02O（M = Co、Mo）半导体提高物理、介电和太阳能光催化效率

铜/钼掺杂的氧化镍半导体对双氯芬酸钠和亚甲基蓝废物具有可见光高效光去除性能。采用简单、低成本的方法合成了 NiO、Ni0.95Cu0.03Co0.02O 和 Ni0.95Cu0.03Mo0.02O 纳米催化剂。晶体结构验证了立方氧化镍单相的形成。所有样品的扫描电子显微镜（SEM）显微照片都显示出均匀的球形颗粒分布。加入 Cu/Co 和 Cu/Mo 离子后，NiO 半导体对可见光的收集能力显著增强。X 射线光电子能谱证实，掺杂铜离子具有 +2 氧化态，而掺杂钼离子具有 +3 和 +4 混合氧化态。Ni0.95Cu0.03Co0.02O 和 Ni0.95Cu0.03Mo0.02O 在低频下显示出较高的介电常数值。在净化废水方面，Cu/Mo 共掺杂 NiO 催化剂在 50 分钟后去除 20 mg/L 亚甲基蓝（MB）和 20 mg/L 双氯芬酸钠（DS）的可见光光催化效率分别为 98% 和 95%。经有机碳总量和化学需氧量分析证实，MB 和 DS 分子被转化为 CO2 和 H2O。此外，这种纳米催化剂对 MB 和 DS 污染物的重复利用率很高，可循环使用四次。

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来源期刊

Journal of Materials Science 工程技术-材料科学：综合

CiteScore

7.90

自引率

4.40%

发文量

1297

审稿时长

2.4 months

期刊介绍： The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.