SiC nanoparticles promote CO2 fixation and biomass production of Chlorella sorokiniana via expanding the abilities of capturing and transmitting photons

IF 4.6 2区 生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Kang Yang, Jin-lan Xia, Yu-xin Chen, Ren-man Zhu, Yang Jian, Chi Xiang, Zhen-yuan Nie, Hong-chang Liu
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引用次数: 0

Abstract

Microalga-semiconductor hybrids for solar-to-biomass conversion which integrate microalgal photosynthesis with the efficient light capture of artificial semiconductors can significantly promote CO2 fixation and productivity of microalgal cells. However, such pertinent studies are poor and the promoting mechanism is unclear yet. Silicon carbide nanoparticles (SiC NPs) have remarkable biocompatibility and photocatalytic ability. Here, to get insights into the promoting mechanism the hybrids were constructed by using SiC NPs and microalga Chlorella sorokiniana, and tested the cell growth, chlorophyll fluorescence, changes in extracellular morphology and structure, absorption spectroscopy and photo-electrochemistry. The results showed that in the hybrid systems with SiC NPs in 0-20 mg/L the cell growth, CO2 fixating and biomass accumulation rate were promoted significantly, with 90 %, 49 % and 38 % increase in the maximum relative electron transport rates, maximal biomass and lipid yields, respectively, in the hybrid with 10 mg/L SiC NPs added. It suggested that SiC NPs can promote microalgal photosynthesis by transferring photogenerated electrons into the electron transport chain, expanding the capture of photoenergy and enhancing intracellular electron transport, rather than photoluminescence or photocatalytic CO2 reduction products.

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来源期刊
Algal Research-Biomass Biofuels and Bioproducts
Algal Research-Biomass Biofuels and Bioproducts BIOTECHNOLOGY & APPLIED MICROBIOLOGY-
CiteScore
9.40
自引率
7.80%
发文量
332
期刊介绍: Algal Research is an international phycology journal covering all areas of emerging technologies in algae biology, biomass production, cultivation, harvesting, extraction, bioproducts, biorefinery, engineering, and econometrics. Algae is defined to include cyanobacteria, microalgae, and protists and symbionts of interest in biotechnology. The journal publishes original research and reviews for the following scope: algal biology, including but not exclusive to: phylogeny, biodiversity, molecular traits, metabolic regulation, and genetic engineering, algal cultivation, e.g. phototrophic systems, heterotrophic systems, and mixotrophic systems, algal harvesting and extraction systems, biotechnology to convert algal biomass and components into biofuels and bioproducts, e.g., nutraceuticals, pharmaceuticals, animal feed, plastics, etc. algal products and their economic assessment
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