排序方式: 共有34条查询结果,搜索用时 15 毫秒
31.
Maria-Veronica Sofianou Christos Trapalis Vassils Psycharis Nikos Boukos Tiverios Vaimakis Jiaguo Yu Wenguang Wang 《Environmental science and pollution research international》2012,19(9):3719-3726
Introduction
TiO2 anatase nanoplates and hollow microspheres were fabricated by a solvothermal?Chydrothermal method using titanium isopropoxide as a titanium precursor and hydrofluoric acid as a capping agent in order to enhance the formation of the {001} crystal facets of the anatase nanocrystals.Methods
These different morphological structures of TiO2 anatase can be achieved by only changing the solvent, keeping the amount of the precursor and of the capping agent identical during the solvothermal?Chydrothermal process.Results and discussion
After calcination of the samples, the adsorbed fluoride atoms on the {001} crystal facets of the TiO2 anatase nanocrystals were completely removed from their surface according to XPS analysis. The calcined TiO2 anatase structures were higher crystallized and the specific surface area of the catalysts increased, enhancing their photocatalytic activity in comparison to the non-calcined TiO2 anatase structures. All TiO2 anatase samples with adsorbed as well as non-adsorbed fluoride atoms on their {001} crystal facets, exhibited a higher photonic efficiency than Degussa P25, which was used as a reference.Conclusion
The fluoride free TiO2 anatase nanoplates exhibited the best photocatalytic activity in oxidizing the NO gas to NO2 and NO3 ?. 相似文献32.
Landscape--wildfire interactions in southern Europe: implications for landscape management 总被引:5,自引:0,他引:5
Moreira F Viedma O Arianoutsou M Curt T Koutsias N Rigolot E Barbati A Corona P Vaz P Xanthopoulos G Mouillot F Bilgili E 《Journal of environmental management》2011,92(10):2389-2402
Every year approximately half a million hectares of land are burned by wildfires in southern Europe, causing large ecological and socio-economic impacts. Climate and land use changes in the last decades have increased fire risk and danger. In this paper we review the available scientific knowledge on the relationships between landscape and wildfires in the Mediterranean region, with a focus on its application for defining landscape management guidelines and policies that could be adopted in order to promote landscapes with lower fire hazard. The main findings are that (1) socio-economic drivers have favoured land cover changes contributing to increasing fire hazard in the last decades, (2) large wildfires are becoming more frequent, (3) increased fire frequency is promoting homogeneous landscapes covered by fire-prone shrublands; (4) landscape planning to reduce fuel loads may be successful only if fire weather conditions are not extreme. The challenges to address these problems and the policy and landscape management responses that should be adopted are discussed, along with major knowledge gaps. 相似文献
33.
Eliopoulos Christos Arapoglou Dimitrios Chorianopoulos Nikos Markou Giorgos Haroutounian Serkos A. 《Environmental science and pollution research international》2022,29(20):29562-29569
Environmental Science and Pollution Research - Brewers’ spent grain (BSG) represents the 85% of the total residue produced during the beer brewing process, with a global annual production... 相似文献
34.
Kondakis Marios Demiris Nikolaos Ntzoufras Ioannis Papanikolaou Nikos E. 《Environmental and Ecological Statistics》2022,29(3):509-555
Environmental and Ecological Statistics - This paper is concerned with a contemporary Bayesian approach to the effect of temperature on developmental rates. We develop statistical methods using... 相似文献