Photoelectrochemical valorization of cellulose over bismuth-based oxide modified titanium dioxide photoanodes

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-08-03 DOI:10.1016/j.jphotochem.2024.115932

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Abstract

Valorizing biomass waste through photoelectrochemical (PEC) methodology provides an attractive strategy for generating H₂ and value-added chemicals by enabling a carbon–neutral cycle. Herein, we present an investigation of a series of bismuth-based oxide-modified TiO₂ as the photoanode for PEC valorization of cellulose in aqueous solution. The bismuth-based oxide was synthesized onto a TiO₂ photoanode by a chemical bath deposition (CBD) method followed by heat treatments. The composition of the materials was adjusted by varying the concentration of the Cu²⁺ and Bi³⁺ precursors. The research shows that Bi₂O₃ effectively suppresses the water oxidation reaction over TiO₂, a competitive side reaction in PEC cellulose oxidation, resulting in a Faradaic efficiency (FE) of 83.9 ± 4.9 % toward formate production. In contrast, unmodified TiO₂ photoanode only exhibits a FE of 25.3 ± 3.7 %. On the other hand, the photoelectrode showed insufficient oxidative force for both water and cellulose oxidation by the surface modification of CuBi₂O₄.

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在铋基氧化物修饰的二氧化钛光阳极上对纤维素进行光电化学估值

通过光电化学（PEC）方法对生物质废弃物进行估值是一种极具吸引力的策略，它可以通过实现碳中和循环产生 H2 和增值化学品。在此，我们介绍了一系列铋基氧化物修饰的 TiO2 作为光阳极，用于水溶液中纤维素的 PEC 值化的研究。铋基氧化物是通过化学沉积（CBD）方法合成到 TiO2 光阳极上的，然后进行热处理。通过改变 Cu2+ 和 Bi3+ 前驱体的浓度来调整材料的组成。研究表明，Bi2O3 比 TiO2 更有效地抑制了水氧化反应（PEC 纤维素氧化过程中的竞争性副反应），从而使甲酸盐生产的法拉第效率（FE）达到 83.9 ± 4.9 %。相比之下，未经改性的二氧化钛光阳极的 FE 仅为 25.3 ± 3.7 %。另一方面，通过对 CuBi2O4 进行表面改性，光电极对水和纤维素的氧化作用都显示出氧化力不足。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

期刊介绍： JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds. All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor). The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.