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Enhanced Carbon Sequestration Performance and Mechanism of Adsorption-Catalytic Bifunctional ZIF-8 Coupled Microalgae

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide To support the development of a low-carbon economy and contribute to the achievement of carbon neutrality, this study synthesized bifunctional zeolitic imidazolate framework-8-based nanozymes (ZNZs) with dual functionality: CO 2 adsorption and carbonic anhydrase (CA)-mimetic catalytic activity. The influence of ZNZs at varying concentrations on the growth rate of microalgae, chlorophyll and carbohydrate content, and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and CA activity were explored. Results indicated that after the addition of 5 mg/L ZNZs, the growth rate of microalgae increased by 7%. Furthermore, the maximum chlorophyll and carbohydrate contents reached 4.55 and 43.59 mg/L, respectively, which were 12.6 and 4.2% higher than those in the control group. Additionally, Rubisco and CA activity (intra- and extracellular) increased by up to 21.26, 10, and 8.3%, respectively. These findings demonstrate that ZNZs enhance the photosynthetic efficiency of microalgae and increase microalgae’s affinity for CO 2, highlighting their promise as a strategy for improving carbon capture and sustainable bioenergy production.

Source: ACS Omega

DOI: 10.1021/acsomega.5c05739

Authors: Luna Wang, Yan Gong, Yanming Miao, Zhifeng Zhang

Institution: Shanxi Normal University

Language: English

Topic: Algal biology and biofuel production

Subfield: Renewable Energy, Sustainability and the Environment

Field: Energy

Domain: Physical Sciences

SDGs: Climate action, Responsible consumption and production, Affordable and clean energy

Open Access status: gold

Estimated APC paid: $1,935