Pillararenes are a new type of supramolecular hosts,and they have been widely applied in drug de-livery,catalysis,separation process,and sensors.However,they have rarely been used to produce hy-drogen.Here,we report that pillararenes were used as functional molecules to explore photocatalysts and efficiently promoted hydrogen production from water.The most common and easily synthesized p-dimethoxy pillar[5]arene(PI-OMe)was employed to form an organic-inorganic hybrid material with tita-nium dioxide(TiO2),denoted as PI-OMe-TiO2,using a convenient sol-gel method.When the material was loaded with Pt nanoparticles,the resulting Pt/PI-OMe-TiO2 had a good activity and stability in catalyzing water splitting to produce hydrogen under visible light.The optimized catalyst Pt/PI-OMe-TiO2(5.2 wt％)had a photocatalytic hydrogen production rate of 1736 μmol g-1 h-1 under visible light(λ＞420 nm)irradiation.The catalyst with a Pt loading of 0.5 wt％and a PI-OMe content of 5.2 wt％also showed good long-term durability after 10 cycles of 50 h testing.The total amount of hydrogen produced was 65.01 mmol/g,and the corresponding turnover number(TON)value was 2084.Our findings suggest that pillararene derivatives are promising functional molecules to make efficient and stable hybrid photocata-lysts with TiO2 and open a new door to hydrogen production using visible light.

Haimei Wu;Mengyuan Wang;Fang Jing;Derui Kong;Yifan Chen;Chunman Jia;Jianwei Li

Hainan Provincial Key Laboratory of Fine Chemicals,Advanced Materials of Tropical Island Resources of Ministry of Education,College of Chemical Engineering and Technology,Hainan University,Haikou 570228,China;MediCity Research Laboratory,University of Turku,Tykist?katu 6,Turku 20520,Finland

中国化学快报（英文版）

[1]Haimei Wu;Mengyuan Wang;Fang Jing;Derui Kong;Yifan Chen;Chunman Jia;Jianwei Li-.Enhanced photocatalytic hydrogen production performance of pillararene-doped mesoporous TiO2 with extended visible-light response)[J].中国化学快报（英文版）,2022(04):1983-1987

pillararene,Pillararenes,pillararenes

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