Spectrophotometric analysis: Challenge for a reliable evaluation of photocatalytic activity under visible light irradiation

IF 12.8 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology C: Photochemistry Reviews Pub Date : 2025-05-31 DOI:10.1016/j.jphotochemrev.2025.100701

Fitri Rizki Amalia , Bunsho Ohtani , Ewa Kowalska

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引用次数: 0

Abstract

Even though dyes have often been used as a model pollutant in photocatalytic degradation tests, their utilization as a substrate might cause unreliable results. Under visible-light (vis) irradiation, dye absorbs light and might sensitize wide-bandgap photocatalyst, which usually is only active under UV. Consequently, dye-decoloration analysis should not be used in the evaluation of photocatalytic activity under vis. To obtain reliable data, colorless compounds are commonly considered as much better substrates for photocatalytic activity testing since they do not absorb vis. However, more expensive analytic methods (e.g., gas and liquid chromatography) than simple UV/vis spectrophotometry (or even spectrometry) must be used for estimation of their concentration. Moreover, colorless compounds might also interact with UV-active photocatalyst, e.g., via molecule to band charge transfer (MBCT), causing photoinduced activity under vis irradiation. Accordingly, this review presents possible prospective methods for reliable but also inexpensive testing of photocatalytic activity under vis irradiation.

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分光光度分析：在可见光照射下可靠评价光催化活性的挑战

尽管染料在光催化降解试验中经常被用作模型污染物，但它们作为底物的使用可能会导致不可靠的结果。在可见光（vis）照射下，染料吸收光并可能增敏宽禁带光催化剂，而这种催化剂通常只在紫外线下有活性。因此，染料脱色分析不应用于评估可见光下的光催化活性。为了获得可靠的数据，无色化合物通常被认为是光催化活性测试的更好底物，因为它们不吸收可见光。然而，必须使用比简单的紫外/可见分光光度法（甚至光谱法）更昂贵的分析方法（例如气相色谱和液相色谱）来估计它们的浓度。此外，无色化合物也可能与紫外光活性光催化剂相互作用，例如通过分子到带电荷转移（MBCT），在可见光照射下产生光诱导活性。因此，本综述提出了可靠且廉价的可见光下光催化活性检测方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Photochemistry and Photobiology C: Photochemistry Reviews 化学-物理化学

CiteScore

21.90

自引率

0.70%

发文量

审稿时长

47 days

期刊介绍： The Journal of Photochemistry and Photobiology C: Photochemistry Reviews, published by Elsevier, is the official journal of the Japanese Photochemistry Association. It serves as a platform for scientists across various fields of photochemistry to communicate and collaborate, aiming to foster new interdisciplinary research areas. The journal covers a wide scope, including fundamental molecular photochemistry, organic and inorganic photochemistry, photoelectrochemistry, photocatalysis, solar energy conversion, photobiology, and more. It provides a forum for discussing advancements and promoting collaboration in the field of photochemistry.