掺杂 Ir 和 La 的 NaTaO3 光催化剂在可见光照射下的整体水分离效果

IF 10.7 2区材料科学 Q1 CHEMISTRY, PHYSICAL

Journal of Materials Chemistry A Pub Date : 2024-09-18 DOI:10.1039/d4ta05136j

Akihide Iwase, Taichi Sato

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引用次数: 0

摘要

通过对掺杂量进行系统研究，发现掺杂 Ir 和 La 的 NaTaO3 是一种新型光催化剂，可在可见光照射下将水整体分离成 H2 和 O2。样品的能带结构取决于掺杂量。在可见光照射下，掺杂少量 Ir 和 La 的 NaTaO3（Ir 与 Ta 的掺杂比例为 0.05 at% 或 0.1 at%）通过电子从 Ir3+ 形成的供体杂质层跃迁到 NaTaO3 的导带，在 500 纳米波长的可见光下进行整体水分离。相比之下，掺杂了大量 Ir 和 La 的 NaTaO3（Ir 与 Ta 的比率为 0.5 at% 或 1 at%）在 600 纳米以上的可见光下显示出的光催化活性不是用于整体水分离，而是用于牺牲性 H2 演化。

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Overall water splitting under visible light irradiation over Ir and La-codoped NaTaO3 photocatalysts

Ir and La-codoped NaTaO3 has been found as a novel photocatalyst for overall water splitting into H2 and O2 under visible light irradiation by systematical investigation in terms of the doping amounts. The band structure of the sample depends on the doping amounts. Overall water splitting under visible light irradiation proceeds over Ir and La-codoped NaTaO3 with small doping levels (0.05 at% or 0.1 at% Ir to Ta) by the electron transition from the donor impurity levels formed by Ir3+ to the conduction band of NaTaO3 responding to visible light up to 500 nm. In contrast, Ir and La-codoped NaTaO3 with large doping levels (0.5 at% or 1 at% Ir to Ta) shows photocatalytic activity not for overall water splitting but for sacrificial H2 evolution responding to visible light beyond 600 nm.

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来源期刊

Journal of Materials Chemistry A CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

19.50

自引率

5.00%

发文量

1892

审稿时长

1.5 months

期刊介绍： The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.