Bioinspired Self‐Supporting Phthalocyanine@ZnIn₂S₄ Foam for Photocatalytic CO₂ Reduction Under Visible Light Irradiation

Abstract

Molecular catalysis for photocatalytic CO2 reduction (PCR) has recently attracted much attention, whereas its scaled practical application is usually limited by the difficulty of recycling and its photochemical instability in homogeneous solutions. Immobilization of molecular catalysts on solid matrices, that is, covalent bonds or noncovalent interactions, provides a great blueprint to tackle this issue. Herein, a bioinspired self‐supporting phthalocyanine@ZnIn2S4 (Pc@ZnIn2S4) foam by growing ZnIn2S4 nanosheets on the commercialized polyurethane foam (PF) followed by loading amino‐modified cobalt phthalocyanine (CoPc–NH2) is developed. The self‐supporting Pc@ZnIn2S4 PF carrier can be directly taken out of the reaction system for the next reaction cycle without any other procedures. The optimized Pc@ZnIn2S4 PF demonstrates superior PCR efficiency under visible light (λ = 420 nm), achieving 474.65 μmol CO g−1 catalyst after 8 h. The superior PCR performance is attributed to the elevated light‐harvesting ability induced by the porous foam structure and the enhanced charge separation efficiency facilitated by the dimension‐matched interface between ZnIn2S4 and Pc. The special design of the immobilization molecular catalyst on solid supporters presented herein develops an efficient strategy for solar‐driven energy conversion.

Photocarrier Dynamics Regulation by Constructing a 2D ZnIn2S4 Nanosheet Array with Highly Exposed Zn Vacancies for Efficient Solar-Driven CO2 Conversion

“…It is evident that the average production rate of 2D V Zn -ZIS reaches 441 μmol g –1 h –1 and exhibits high product selectivity of CO, as proved by Figure S9. In contrast to the recently reported ZIS-based photocatalysts for solar-driven CO 2 conversion, ,,,,− 2D V Zn -ZIS in this work exhibits the most satisfactory solar energy conversion performance with an almost maximal CO production rate (Figure c). Further comparison with other photocatalysts demonstrates the advantage of 2D V Zn -ZIS in gas–solid-phase photocatalytic CO 2 conversion (Table S1).…”

Temperature‐Dependent Photoredox Catalysis for CO2 Reduction Coupled with Selective Benzyl Alcohol Oxidation over ZnIn2S4/In2O3 Heterostructure

“…The environmental crisis has gained global attention with the ever-increasing CO 2 emissions caused by the over-consumption of fossil fuels. [1][2][3][4] Within this context, reducing CO 2 into value-added chemicals, such as CO, CH 4 , CH 3 OH, or syngas through photocatalysis, [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] thermocatalysis, [25][26][27] and electrocatalysis [28][29][30][31][32] is of great environmental, energy, and economic interests. Especially, photocatalysis, an environmentally friendly and recyclable process, has become the worldwide research focus on the promotion of CO 2 reduction reaction (CO 2 RR).…”