在X射线照射下，金纳米颗粒催化过氧化氢分解导致羟基自由基产率增加。
Increase of OH radical yields due to the decomposition of hydrogen peroxide by gold nanoparticles under X-ray irradiation.
作者信息
Okazaki Yu, Kusumoto Tamon, Roux Stephane, Hirayama Ryoichi, Fromm Michel, Bazzi Rana, Kodaira Satoshi, Kataoka Jun
机构信息
Graduate School of Advanced Science and Engineering, Waseda University 3-4-1 Okubo, Shinjuku-ku Tokyo 169-8555 Japan.
National Institutes for Quantum Science and Technology (QST) 4-9-1 Anagawa, Inage-ku Chiba 263-8555 Japan
出版信息
RSC Adv. 2024 Mar 20;14(14):9509-9513. doi: 10.1039/d4ra00208c.
We elucidate the decomposition mechanism of hydrogen peroxide, which is formed by water radiolysis, by gold nanoparticles (GNPs) under X-ray irradiation. The variations in yields of hydrogen peroxide generated in the presence of GNPs are evaluated using the Ghormley technique. The increase of yields of OH radicals has been quantified using Ampliflu® Red solutions. Almost all hydrogen peroxide generated by irradiation of <25 Gy is decomposed by GNPs, while the yield of OH radicals increases by 1.6 times. The amount of OH radicals thus obtained is almost equivalent to that of the decomposed hydrogen peroxide. The decomposition of hydrogen peroxide is an essential reaction to produce additional OH radicals efficiently in the vicinity of GNPs.
我们阐明了在X射线照射下，由水辐射分解形成的过氧化氢被金纳米颗粒（GNP）分解的机制。使用戈姆利技术评估了在存在GNP的情况下产生的过氧化氢产率的变化。使用Ampliflu® Red溶液对OH自由基产率的增加进行了定量。照射剂量<25 Gy产生的几乎所有过氧化氢都被GNP分解，而OH自由基的产率增加了1.6倍。由此获得的OH自由基量几乎与分解的过氧化氢量相当。过氧化氢的分解是在GNP附近有效产生额外OH自由基的关键反应。
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