Graphene Oxide Modified Ni-CoTCPP/TiO2NTs Heterojunction for Boosting Photocatalytic CO2 Reduction

IF 2.3 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Letters Pub Date : 2025-05-24 DOI:10.1007/s10562-025-05056-y

Tongxin Xiao, Xige Wu, Hongbao Liang, Kangyue Qiao, Ying Chen, Chao Sui, Songyao Du, Yue Wang

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引用次数: 0

Abstract

In the face of the global energy crisis and the pressing need for CO₂ reduction, developing efficient CO₂ photocatalytic conversion technologies is of significant. In this study, a new artificial photosynthesis system for reducing CO₂ to CH₄ was established by imitating natural photosynthesis. Porphyrins in plants are the carriers of photosynthesis in nature, composite catalysts were prepared by bimetallic porphyrin and TiO₂ nanotube arrays (TiO₂NTs). Meanwhile, because of the defects of poor conductivity of the porphyrin-TiO₂ composite catalyst, the Ni-Co bimetallic porphyrins (Ni-CoTCPP) / graphene oxide (GO) /TiO₂NTs composite photocatalyst was constructed by loading GO to effectively separate electron-hole and further improve the reduction performance. Experimental results show that this composite material exhibits significantly enhanced CO₂ photocatalytic reduction activity under simulated solar light, with a CH₄ production rate of up to 61.55 µmol·cm⁻²·h⁻¹ and an apparent quantum efficiency of 1.2%, approximately 8.6 times higher than that of pure TiO₂NTs. Furthermore, based on the results of photocatalytic evaluation and photo(electro)chemical analysis, a possible mechanism for CO₂ photoreduction over the Ni-CoTCPP/GO/TiO₂NTs photocatalyst was proposed.

Graphical Abstract

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氧化石墨烯修饰Ni-CoTCPP/TiO2NTs异质结促进光催化CO2还原

面对全球能源危机和对CO₂减排的迫切需求，开发高效的CO₂光催化转化技术具有重要意义。本研究通过模拟自然光合作用，建立了一种新的将CO2还原为CH4的人工光合系统。天然植物卟啉是光合作用的载体，采用双金属卟啉与TiO2纳米管阵列（TiO2NTs）制备复合催化剂。同时，针对卟啉- tio2复合催化剂导电性差的缺陷，通过负载GO构建Ni-Co双金属卟啉(Ni-CoTCPP) /氧化石墨烯(GO) / tio2 - nts复合光催化剂，有效分离电子空穴，进一步提高还原性能。实验结果表明，该复合材料在模拟太阳光线下表现出明显增强的CO₂光催化还原活性，其生成CH₄的速率高达61.55µmol·cm⁻²·h⁻¹，表观量子效率为1.2%，比纯TiO₂NTs高约8.6倍。此外，基于光催化评价和光（电）化学分析结果，提出了Ni-CoTCPP/GO/TiO₂NTs光催化剂光还原CO₂的可能机理。图形抽象

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来源期刊

Catalysis Letters 化学-物理化学

CiteScore

5.70

自引率

3.60%

发文量

327

审稿时长

1 months

期刊介绍： Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis. The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.