Color,whiteness and glossiness of four caesalpiniaceae wood species were characterized by quantitative measurements and image analysis,i.e.,which were respectively Berlinia bracteosa Benth.,Monopetalanthus heitzii Pel...Color,whiteness and glossiness of four caesalpiniaceae wood species were characterized by quantitative measurements and image analysis,i.e.,which were respectively Berlinia bracteosa Benth.,Monopetalanthus heitzii Pellegr.,Distemonanthus benthamianus and Erythrophleum ivorense A.Chev.The color of four wood species was evaluated to be consistent by the CIELab and CIE1931 color system.The boards of B.bracteosa,M.heitzii and E.ivorense was divided into dark color.The wood color of B.bracteosa had the highest red to green hue,while the wood appearance of D.benthamianus had the brightest and yellowest color within the four wood species.The whiteness of D.benthamianus was significantly higher than the other three wood species,namely tangential section 21.9%and radial section 22.2%.Hence,the color of the four species varied significantly,which was closely related to internal constituents of wood materials.M.heitzii wood had the highest surface glossiness on both tangential and radial section surfaces.The surface glossiness was highly related to the wood microstructure,especially with the pore and groove structure.This study of the visible characteristics provided the indicated knowledge for the application of the four wood species in wood industry.展开更多
Wood-based nanotechnologies have received much attention in the area of photocatalytic degradation of organic contaminants in aquatic environment in recent years,because of the high abundance and renewability of wood ...Wood-based nanotechnologies have received much attention in the area of photocatalytic degradation of organic contaminants in aquatic environment in recent years,because of the high abundance and renewability of wood as well as the high reaction activity and unique structural features of these materials.Herein,we present a comprehensive review of the current research activities centering on the development of wood-based nanocatalysts for photodegradation of organic pollutants.This review begins with a brief introduction of the development of photocatalysts and hierarchical structure of wood.The review then focuses on strategies of designing novel photocatalysts based on wood or its recombinants(such as 1D fiber,2D films and 3D porous gels)using advanced nanotechnology including sol-gel method,hydrothermal method,magnetron sputtering method,dipping method and so on.Next,we highlight typical approaches that improve the photocatalytic property,including metal element doping,morphology control and semiconductor coupling.Also,the structure-activity relationship of photocatalysts is emphasized.Finally,a brief summary and prospect of wood-derived photocatalysts is provided.展开更多
基金This work was financially supported by the Hunan Provincial Natural Science Foundation of China(2020JJ2058)Scientific Research Foundation of Hunan Provincial Education Department(18A159)Technology Innovation Project of Yihua Lifestyle Technology Co.,Ltd.(YH-JSJSKF-201708006).
文摘Color,whiteness and glossiness of four caesalpiniaceae wood species were characterized by quantitative measurements and image analysis,i.e.,which were respectively Berlinia bracteosa Benth.,Monopetalanthus heitzii Pellegr.,Distemonanthus benthamianus and Erythrophleum ivorense A.Chev.The color of four wood species was evaluated to be consistent by the CIELab and CIE1931 color system.The boards of B.bracteosa,M.heitzii and E.ivorense was divided into dark color.The wood color of B.bracteosa had the highest red to green hue,while the wood appearance of D.benthamianus had the brightest and yellowest color within the four wood species.The whiteness of D.benthamianus was significantly higher than the other three wood species,namely tangential section 21.9%and radial section 22.2%.Hence,the color of the four species varied significantly,which was closely related to internal constituents of wood materials.M.heitzii wood had the highest surface glossiness on both tangential and radial section surfaces.The surface glossiness was highly related to the wood microstructure,especially with the pore and groove structure.This study of the visible characteristics provided the indicated knowledge for the application of the four wood species in wood industry.
基金This study was supported by the National Natural Science Foundation of China(Grant Nos.31901249 and 31890771)the Young Elite Scientists Sponsorship Program by CAST(Grant No.2019QNRC001)+2 种基金the Scientific Research Foundation of Hunan Provincial Education Department(Grant No.18B180)the China Postdoctoral Science Foundation(Grant No.2020M672846)the Outstanding Chinese and Foreign Youth Exchange Program of China Association of Science and Technology.
文摘Wood-based nanotechnologies have received much attention in the area of photocatalytic degradation of organic contaminants in aquatic environment in recent years,because of the high abundance and renewability of wood as well as the high reaction activity and unique structural features of these materials.Herein,we present a comprehensive review of the current research activities centering on the development of wood-based nanocatalysts for photodegradation of organic pollutants.This review begins with a brief introduction of the development of photocatalysts and hierarchical structure of wood.The review then focuses on strategies of designing novel photocatalysts based on wood or its recombinants(such as 1D fiber,2D films and 3D porous gels)using advanced nanotechnology including sol-gel method,hydrothermal method,magnetron sputtering method,dipping method and so on.Next,we highlight typical approaches that improve the photocatalytic property,including metal element doping,morphology control and semiconductor coupling.Also,the structure-activity relationship of photocatalysts is emphasized.Finally,a brief summary and prospect of wood-derived photocatalysts is provided.
