Using clean solar energy to reduce CO_(2)into value-added products not only consumes the over-emitted CO_(2)that causes environmental problems,but also generates fuel chemicals to alleviate energy crises.The photocata...Using clean solar energy to reduce CO_(2)into value-added products not only consumes the over-emitted CO_(2)that causes environmental problems,but also generates fuel chemicals to alleviate energy crises.The photocatalytic CO_(2)reduction reaction(PCO_(2)RR)relies on the semiconductor photocatalysts that suffer from high recombination rate of the photo-generated carriers,low light harvesting capability,and low stability.This review explores the recent discoveries on the novel semiconductors for PCO_(2)RR,focusing on the rational catalyst design strategies(such as surface engineering,band engineering,hierarchical structure construction,single-atom catalysts,and biohybrid catalysts)that promote the catalytic performance of semiconductor catalysts on PCO_(2)RR.The advanced characterization techniques that contribute to understanding the intrinsic properties of the photocatalysts are also discussed.Lastly,the perspectives on future challenges and possible solutions for PCO_(2)RR are presented.展开更多
As a bioproduct from the thermal decomposition of biomass,biochar has various applications in diversified field.In this study,a bibliometric analysis was conducted to visualize the current research status and trends o...As a bioproduct from the thermal decomposition of biomass,biochar has various applications in diversified field.In this study,a bibliometric analysis was conducted to visualize the current research status and trends of biochar research.A total of 5535 documents were collected from the Web of Science Core Collection and subjected to visualization analysis for the biochar field’s development in 2021 with CiteSpace software.The visual analysis results demonstrate that the number of publications expanded dramatically in 2021,and the growth trend would continue.China and USA were the most contributing countries in biochar research in terms of the number of publications.Based on the keyword co-occurrence analyses,“Biochar for toxic metal immobilization”,“Biochar-based catalyst for biofuel production”,“Biochar for global climate change mitigation”,“Biochar for salinity and drought stress amelioration”,“Biochar amendment in composting”,and“Biochar as additives in anaerobic digestion”were the main research trends and hotspots in this field in 2021.This indicates that the biochar research was multidisciplinary.Regarding the research hotspots,the employment of biochar as heterogeneous catalysts for biofuel production gained great attention in 2021.On the contrary,bioremediation using functional bacteria immobilized on biochar and biochar-assisted advanced oxidation process were well-studied but with less frequency than other topics in 2021.Furthermore,the future research was proposed for green and sustainable applications of biochar.This review provides a comprehensive overview of the research frontiers,the evolution of research hotspots,and potential future research directions in the biochar field.展开更多
基金This work was supported by the Natural Sciences and Engineering Research Council of Canada(NSERC)。
文摘Using clean solar energy to reduce CO_(2)into value-added products not only consumes the over-emitted CO_(2)that causes environmental problems,but also generates fuel chemicals to alleviate energy crises.The photocatalytic CO_(2)reduction reaction(PCO_(2)RR)relies on the semiconductor photocatalysts that suffer from high recombination rate of the photo-generated carriers,low light harvesting capability,and low stability.This review explores the recent discoveries on the novel semiconductors for PCO_(2)RR,focusing on the rational catalyst design strategies(such as surface engineering,band engineering,hierarchical structure construction,single-atom catalysts,and biohybrid catalysts)that promote the catalytic performance of semiconductor catalysts on PCO_(2)RR.The advanced characterization techniques that contribute to understanding the intrinsic properties of the photocatalysts are also discussed.Lastly,the perspectives on future challenges and possible solutions for PCO_(2)RR are presented.
基金National Natural Science Foundation of China(Project No.42225701,42007355).
文摘As a bioproduct from the thermal decomposition of biomass,biochar has various applications in diversified field.In this study,a bibliometric analysis was conducted to visualize the current research status and trends of biochar research.A total of 5535 documents were collected from the Web of Science Core Collection and subjected to visualization analysis for the biochar field’s development in 2021 with CiteSpace software.The visual analysis results demonstrate that the number of publications expanded dramatically in 2021,and the growth trend would continue.China and USA were the most contributing countries in biochar research in terms of the number of publications.Based on the keyword co-occurrence analyses,“Biochar for toxic metal immobilization”,“Biochar-based catalyst for biofuel production”,“Biochar for global climate change mitigation”,“Biochar for salinity and drought stress amelioration”,“Biochar amendment in composting”,and“Biochar as additives in anaerobic digestion”were the main research trends and hotspots in this field in 2021.This indicates that the biochar research was multidisciplinary.Regarding the research hotspots,the employment of biochar as heterogeneous catalysts for biofuel production gained great attention in 2021.On the contrary,bioremediation using functional bacteria immobilized on biochar and biochar-assisted advanced oxidation process were well-studied but with less frequency than other topics in 2021.Furthermore,the future research was proposed for green and sustainable applications of biochar.This review provides a comprehensive overview of the research frontiers,the evolution of research hotspots,and potential future research directions in the biochar field.
