Biosynthetic CdS-Thiobacillus thioparus hybrid for solar-driven carbon dioxide fixation  

作　　者：Guangyu Liu Feng Gao Hongwei Zhang Lei Wang Chao Gao Yujie Xiong 

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale,and School of Chemistry and Materials Science,University of Science and Technology of China,Hefei 230026,China [2]Institute of Energy,Hefei Comprehensive National Science Center,350 Shushanhu Rd.,Hefei 230031,China [3]State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China [4]Shanghai Institute of Pollution Control and Ecological Security,Shanghai 200092,China

出　　处：《Nano Research》2023年第4期4531-4538,共8页纳米研究（英文版）

基　　金：supported by the National Key R&D Program of China(No.2020YFA0406103);the National Natural Science Foundation of China(Nos.21725102,91961106,and 91963108),DNL Cooperation Fund,CAS(No.DNL201922);Youth Innovation Promotion Association CAS.

摘　　要：Synergistically combining biological whole-cell bacteria with man-made semiconductor materials innovates the way for sustainable solar-driven CO_(2)fixation,showing great promise to break through the bottleneck in traditional chemical photocatalyst systems.However,most of the biohybrids require uneconomical organic nutrients and anaerobic conditions for the successful cultivation of the bacteria to sustain the CO_(2)fixation,which severely limits their economic viability and applicability for practical application.Herein,we present an inorganic-biological hybrid system composed of obligate autotrophic bacteria Thiobacillus thioparus(T.thioparus)and CdS nanoparticles(NPs)biologically precipitated on the bacterial surface,which can achieve efficient CO_(2)fixation based entirely on cost-effective inorganic salts and without the restriction of anaerobic conditions.The optimized interface between CdS NPs and T.thioparus formed by biological precipitation plays an essential role for T.thioparus efficiently receiving photogenerated electrons from CdS NPs and thus changing the autotrophic way from chemoautotroph to photoautotroph.As a result,the CdS-T.thioparus biohybrid realizes the solar-driven CO_(2)fixation to produce multi-carbon glutamate synthase and biomass under visible-light irradiation with CO_(2)as the only carbon source.This work provides significant inspiration for the further exploration of the solar-driven self-replicating biocatalytic system to achieve CO_(2)fixation and conversion.

关 键 词：biohybrids solar-driven CO_(2)fixation carbon cycle autotrophic bacteria Thiobacillus thioparus cadmium sulfide 

分 类 号：O61[理学—无机化学]