| Title |
Solar driven catalytic conversion of cellulose biomass into lactic acid over copper reconstructed natural mineral |
| ID_Doc |
11102 |
| Authors |
Zhong, MH; Li, XZ; Chu, XN; Gui, HG; Zuo, SX; Yao, C; Li, ZY; Chen, YS |
| Title |
Solar driven catalytic conversion of cellulose biomass into lactic acid over copper reconstructed natural mineral |
| Year |
2022 |
| Published |
|
| DOI |
10.1016/j.apcatb.2022.121718 |
| Abstract |
Development of new technologies for conversion of biomass-based compounds into energy sources and basic chemicals is important for a circular economy. In this study, a unique solar driven catalysis system is developed to convert cellulose into lactic acid (LA) using Cu modified natural palygorskite (Pal) catalyst. Adequate Cu incorporation reframes Pal with a reduced band gap. As the mass ratio of Cu goes beyond 6 wt%, extra Cu2O quantum dots (QDs) assemble in situ on the Cu-Pal surface and form Cu2O/Cu-Pal heterostructure, which effectively promotes the charge transfer and exposes abundant Lewis acid sites for synergistic adsorption and conversion of intermediates. Notably, the colloidal character of the Cu-Pal substrate enables intimate adsorption of catenulate cellulose. The 10 wt% Cu2O QDs/Cu-Pal nanocomposite exhibits remarkable photocatalytic LA selectivity under visible light. Time-resolved in-situ attenuated total reflectance infrared (ATR-IR) spectros-copy and the density functional theory calculation (DFT) are employed to help elucidate the photocatalytic mechanism. Both theoretical and experimental studies demonstrate that such a Cu-modified mineral catalyzes a series of tandem reactions for LA formation, including the precise cleavage of beta-1,4-glycosidic bonds of cellulose into glucose, selective cleavage of the C3-C4 bond of glucose to C3 intermediates via photogenerated holes, and the selective conversion of C3 into LA. Our findings provide a new potential sustainable alternative for biomass valorization. |
| Author Keywords |
Natural mineral; Palygorskite; Copper; Photocatalysis; Cellulose; Biomass valorization |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:000854094700003 |
| WoS Category |
Chemistry, Physical; Engineering, Environmental; Engineering, Chemical |
| Research Area |
Chemistry; Engineering |
| PDF |
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