Enzyme engineering is an important part of modern biotechnology.Due to its high reaction specificity,high efficiency,mild reaction conditions,and low pollution,it is also an important method widely used in the pharmac...Enzyme engineering is an important part of modern biotechnology.Due to its high reaction specificity,high efficiency,mild reaction conditions,and low pollution,it is also an important method widely used in the pharmaceutical field.The application of enzymes in medicine is diverse,such as:diagnosis,prevention and treatment of diseases with enzymes,manufacture of various drugs with enzymes,etc.,mainly through manual operations,to obtain enzymes required by the pharmaceutical industry,and through various means Enzymes perform their catalytic functions.This article mainly introduces the application of enzyme engineering in the pharmaceutical field,and also prospects the development trend of enzyme engineering in the pharmaceutical field.展开更多
The preparation of green and economical bio-aviation fuel is a priority for the sustainable development industry.In this study,Jatropha oil was used as a raw material to catalyze the conversion of raw material to avia...The preparation of green and economical bio-aviation fuel is a priority for the sustainable development industry.In this study,Jatropha oil was used as a raw material to catalyze the conversion of raw material to aviation kerosene fraction by photothermal coupling under the conditions of light and low temperature.The correlations among conversion rate,target alkane selectivity,composition distribution,and catalyst microstructure were investigated by X-ray diffraction(XRD),high-resolution transmission electron microscopy(HRTEM),nitrogen(N2)adsorption and desorption,X-ray fluorescence(XRF),ammoniatemperature programmed desorption(NH3-TPD),ultraviolet-visible spectrophotometry(UV-Vis),and other characterization.The correlation between conversion and target alkane selectivity and composition distribution and catalyst microstructure was investigated,and different modification methods and different molecular sieve materials were selected.The results showed that the molecular sieves modified with the solid dispersion method could retain the structural stability of titanium dioxide(TiO2)and molecular sieves to a great extent while slightly enhancing the pore capacity and pore size of the catalyst to make it easier to adsorb reactants;the introduction of active metal platinum(Pt)could reduce the forbidden bandwidth of the catalyst,increase the weak acid amount of the catalyst,improve the adsorption capacity of hydrogen(H2),and thus improve the catalytic ability,resulting in a suitable catalyst for this study:P-21.The photothermal catalytic reaction of Jatropha oil using P-21 catalyst obtained 97.21%conversion and 74.99%selectivity of the target alkanes under the optimal process parameters.The results of this study provide effective catalyst parameters for research in the field of clean energy.展开更多
There have been remarkable progresses in manipulating heterogeneous catalysts' nanostructures in the past decade.The concept of single atom alloy (SAA) was firstly proposed in 2012 when researchers successfully st...There have been remarkable progresses in manipulating heterogeneous catalysts' nanostructures in the past decade.The concept of single atom alloy (SAA) was firstly proposed in 2012 when researchers successfully stabilized single Pd atoms on the Cu(111) surface.However,earlier work in 2009,which focused on replacing one Au atom with a Pd atom in thiolate protected Au25 nanoclusters,could also be considered as the pioneer work of single atom alloy.Both kinds of single atom alloys exhibited the potential of maximum utilization of scarce elements and attractive catalytic performances.The well-defined structures of SAA catalysts make accurate modeling possible,which further realizes the rational design of single atom alloy catalysts.In this review,we summarize the research trajectory of single atom alloys as well as recent achievements in this field.We also Introduce several commonly adopted characterization methods for SAA catalysts such as scanning tunneling microscopy (STM),temperature programmed reaction (TPR),extended X-ray absorption fine structure (EXAFS) spectra,matrix assisted laser desorption/ionization mass spectrum (MALDI-MS) and differential pulse voltammetry (DPV).Through discussing recent progresses in SAA catalysts,we propose that future researches in this filed should be focused on exploring new kinds of metal nanocrystals and controlling the nanostructure of SAA even more precisely.展开更多
Carbon has three hybridization forms of sp^(-),sp^(2-)and sp^(3-),and the combination of diferent forms can obtain diferent kinds of carbon allotropes,such as diamond,carbon nanotubes,fullerene,graphynes(GYs)and graph...Carbon has three hybridization forms of sp^(-),sp^(2-)and sp^(3-),and the combination of diferent forms can obtain diferent kinds of carbon allotropes,such as diamond,carbon nanotubes,fullerene,graphynes(GYs)and graphdiyne(GDY).Among them,the GDY molecule is a single-layer two-dimensional(2D)planar structure material with highlyπ-conjugation formed by sp^(-)and sp^(2-)hybridization.GDY has a carbon atom ring composed of benzene ring and acetylene,which makes GDY have a uniformly distributed pore structure.In addition,GDY planar material have some slight wrinkles,which makes GDY have better self-stability than other 2D planar materials.The excellent properties of GDY make it attract the attention of researchers.Therefore,GDY is widely used in chemical catalysis,electronics,communications,clean energy and composite materials.This paper summarizes the recent progress of GDY research,including structure,preparation,properties and application of GDY in the field of catalysts.展开更多
To address the issues of energy crisis and global warming, novel renewable carbon-free or carbon-neutral energy sources must be identified and developed. A deeper understanding of photosynthesis is the key to provide ...To address the issues of energy crisis and global warming, novel renewable carbon-free or carbon-neutral energy sources must be identified and developed. A deeper understanding of photosynthesis is the key to provide a solid foundation to facilitate this transformation. To mimic the water oxidation of photosystem II oxygen evolving complex, Mn-oxo complexes and Co-phosphate catalytic material were discovered in solar energy storage. Building on these discoveries, recent advances in solar energy conversion showed a compelling working principle by combing the active Mn-oxo and Co-based catalysts in water splitting with semiconductor heteronanostructures for effective solar energy harnessing. In this review the appealing systems including Mn-oxo tetramer/Nafion, Mn-oxo dimer/TiO2, Mn-oxo oligomer/WO3, Co-Pi/Fe2O3, and Co-Pi/ZnO are summarized and discussed. These accomplishments offer a promising framework and have a profound impact in the field of solar fuel production.展开更多
Comprehensive Summary Amorphous nanomaterials are metastable nanomaterials which only have short-range order within a few neighboring atoms,based on the local chemical bondings.Different from crystalline materials,the...Comprehensive Summary Amorphous nanomaterials are metastable nanomaterials which only have short-range order within a few neighboring atoms,based on the local chemical bondings.Different from crystalline materials,the amorphous nanomaterials lack of long-range order exhibit many intriguing and unique structu ral features,such as abundant active sites,structural flexibility,intrinsic isotropy and fast ionic transport.However,due to the unco nventional structural complexity,the systematic study and understanding of amorphous nanomaterials are still in the early stage.In this review,we will describe our journey to the synthesis,characterization and applications of amorphous nanomaterials,including catalysis,energy storage,optics and mechanics.展开更多
文摘Enzyme engineering is an important part of modern biotechnology.Due to its high reaction specificity,high efficiency,mild reaction conditions,and low pollution,it is also an important method widely used in the pharmaceutical field.The application of enzymes in medicine is diverse,such as:diagnosis,prevention and treatment of diseases with enzymes,manufacture of various drugs with enzymes,etc.,mainly through manual operations,to obtain enzymes required by the pharmaceutical industry,and through various means Enzymes perform their catalytic functions.This article mainly introduces the application of enzyme engineering in the pharmaceutical field,and also prospects the development trend of enzyme engineering in the pharmaceutical field.
基金supported by the National Natural Science Foundation of China(Grant No.21868014)a Key Project of the Yunnan Fundamental Research Program(Study on Design of Novel Catalyst and Catalytic Process for Preparation of Bioaviation Kerosene from Vegetable Oils Based on Photo-thermal Catalytic Technology),2021 Low-carbon Development Guide Project of Yunnan Province,China(No.135),Key S&T Project of China Tobacco Yunnan Industrial Co.,Ltd.,(Grant No.2022GY03)+4 种基金Yunnan Academician and Expert Workstation(Grant No.202205AF150024)Yunnan International S&T Cooperation Program,China(Grant No.202003AF140001)Yunnan S&T Talents and Platform Program(Grant No.202105AC160058)Kunming International S&T Cooperation Base,China(Grant No.GHJD-2020026)Scientific research project of Yunnan Environmental Science Society,China(Grant No.XHKYKT006).
文摘The preparation of green and economical bio-aviation fuel is a priority for the sustainable development industry.In this study,Jatropha oil was used as a raw material to catalyze the conversion of raw material to aviation kerosene fraction by photothermal coupling under the conditions of light and low temperature.The correlations among conversion rate,target alkane selectivity,composition distribution,and catalyst microstructure were investigated by X-ray diffraction(XRD),high-resolution transmission electron microscopy(HRTEM),nitrogen(N2)adsorption and desorption,X-ray fluorescence(XRF),ammoniatemperature programmed desorption(NH3-TPD),ultraviolet-visible spectrophotometry(UV-Vis),and other characterization.The correlation between conversion and target alkane selectivity and composition distribution and catalyst microstructure was investigated,and different modification methods and different molecular sieve materials were selected.The results showed that the molecular sieves modified with the solid dispersion method could retain the structural stability of titanium dioxide(TiO2)and molecular sieves to a great extent while slightly enhancing the pore capacity and pore size of the catalyst to make it easier to adsorb reactants;the introduction of active metal platinum(Pt)could reduce the forbidden bandwidth of the catalyst,increase the weak acid amount of the catalyst,improve the adsorption capacity of hydrogen(H2),and thus improve the catalytic ability,resulting in a suitable catalyst for this study:P-21.The photothermal catalytic reaction of Jatropha oil using P-21 catalyst obtained 97.21%conversion and 74.99%selectivity of the target alkanes under the optimal process parameters.The results of this study provide effective catalyst parameters for research in the field of clean energy.
基金This work was supported by the National Natural Science Foundation of China (Nos. 21721004, 21711530020, 21690082, 21690084, and 21690080)the Strategic Priority Research Program of Chinese Academy of Sciences (Nos. XDB17020300 and XDB17000000).
文摘There have been remarkable progresses in manipulating heterogeneous catalysts' nanostructures in the past decade.The concept of single atom alloy (SAA) was firstly proposed in 2012 when researchers successfully stabilized single Pd atoms on the Cu(111) surface.However,earlier work in 2009,which focused on replacing one Au atom with a Pd atom in thiolate protected Au25 nanoclusters,could also be considered as the pioneer work of single atom alloy.Both kinds of single atom alloys exhibited the potential of maximum utilization of scarce elements and attractive catalytic performances.The well-defined structures of SAA catalysts make accurate modeling possible,which further realizes the rational design of single atom alloy catalysts.In this review,we summarize the research trajectory of single atom alloys as well as recent achievements in this field.We also Introduce several commonly adopted characterization methods for SAA catalysts such as scanning tunneling microscopy (STM),temperature programmed reaction (TPR),extended X-ray absorption fine structure (EXAFS) spectra,matrix assisted laser desorption/ionization mass spectrum (MALDI-MS) and differential pulse voltammetry (DPV).Through discussing recent progresses in SAA catalysts,we propose that future researches in this filed should be focused on exploring new kinds of metal nanocrystals and controlling the nanostructure of SAA even more precisely.
基金This work was partially supported by the National Natural Science Foundation of China(Grant Nos.61605016 and 6180021914).
文摘Carbon has three hybridization forms of sp^(-),sp^(2-)and sp^(3-),and the combination of diferent forms can obtain diferent kinds of carbon allotropes,such as diamond,carbon nanotubes,fullerene,graphynes(GYs)and graphdiyne(GDY).Among them,the GDY molecule is a single-layer two-dimensional(2D)planar structure material with highlyπ-conjugation formed by sp^(-)and sp^(2-)hybridization.GDY has a carbon atom ring composed of benzene ring and acetylene,which makes GDY have a uniformly distributed pore structure.In addition,GDY planar material have some slight wrinkles,which makes GDY have better self-stability than other 2D planar materials.The excellent properties of GDY make it attract the attention of researchers.Therefore,GDY is widely used in chemical catalysis,electronics,communications,clean energy and composite materials.This paper summarizes the recent progress of GDY research,including structure,preparation,properties and application of GDY in the field of catalysts.
基金supported by the University of Massachusetts Dartmouth and in part by a grant from the USDA CSREES
文摘To address the issues of energy crisis and global warming, novel renewable carbon-free or carbon-neutral energy sources must be identified and developed. A deeper understanding of photosynthesis is the key to provide a solid foundation to facilitate this transformation. To mimic the water oxidation of photosystem II oxygen evolving complex, Mn-oxo complexes and Co-phosphate catalytic material were discovered in solar energy storage. Building on these discoveries, recent advances in solar energy conversion showed a compelling working principle by combing the active Mn-oxo and Co-based catalysts in water splitting with semiconductor heteronanostructures for effective solar energy harnessing. In this review the appealing systems including Mn-oxo tetramer/Nafion, Mn-oxo dimer/TiO2, Mn-oxo oligomer/WO3, Co-Pi/Fe2O3, and Co-Pi/ZnO are summarized and discussed. These accomplishments offer a promising framework and have a profound impact in the field of solar fuel production.
基金supported by the National Natural Science Foundation of China(Nos.51532001,52272181 and 51872016).
文摘Comprehensive Summary Amorphous nanomaterials are metastable nanomaterials which only have short-range order within a few neighboring atoms,based on the local chemical bondings.Different from crystalline materials,the amorphous nanomaterials lack of long-range order exhibit many intriguing and unique structu ral features,such as abundant active sites,structural flexibility,intrinsic isotropy and fast ionic transport.However,due to the unco nventional structural complexity,the systematic study and understanding of amorphous nanomaterials are still in the early stage.In this review,we will describe our journey to the synthesis,characterization and applications of amorphous nanomaterials,including catalysis,energy storage,optics and mechanics.
