Novel core-shell green catalysts for detoxifying hazardous chlorine compounds in water

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K05569
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
• Research Institution: Nihon University
• Principal Investigator: YONEDA Tetsuya 日本大学, 理工学部, 教授 (00307802)
• Co-Investigator(Kenkyū-buntansha): 小泉 公志郎 日本大学, 理工学部, 准教授 (10312042) ; 伊藤 賢一 日本大学, 理工学部, 准教授 (10373002)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: 水素化脱塩素反応 / アルミナ担持白金触媒 / 有機ホスホン酸 / クロロフェノール / 自己組織化機能

Outline of Final Research Achievements

A novel catalyst that performs in water was developed to perform the hydrodechlorination of 4-chlorophenol, a toxic organochlorine compound, in an environmental benign water process. We prepared a catalyst with a catalyst core consisting of widely dispersed highly dispersed platinum particles of about 2 nm (commercial product: about 4 nm) on an aluminum oxide, and a shell consisting of hydrophobic organophosphonic acid bonded to the core (core). When the catalyst with this core/shell structure was used, the decomposition (dechlorination) efficiency of 4-chlorophenol in an aqueous solution containing 2% ethanol was increased 1.5-1.6 times at 3 minutes after the start of the reaction. Similarly, when the organophosphonic acid was bound with a commercial catalyst, the catalyst (core-shell) was successfully synthesized with up to 1.9 times higher activity than the unmodified catalyst (bare).

Free Research Field

触媒化学

Academic Significance and Societal Importance of the Research Achievements

残留性有機汚染物質(POPs)は人体や環境中に蓄積しやすい有害物質である。このPOPsのモデル化合物を用いた塩素化合物の無害化（脱塩素化）に水中で機能する触媒を合成した。触媒を溶液に浸し乾燥する簡単な方法で水中でPOPs処を集積して分解する反応が促進された。触媒表面の有機構造はさらに分子で結合化することで有機層の拡張が見込まれ、水中でより分解されにくい大きな有機構造にできる。それゆえ、触媒表面に反応場を持った新規触媒として種々の反応へ適用する応用性を拡げた。