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UNEP发布《全球食物浪费指数报告2024》 快报文章
资源环境快报,2024年第7期
作者:  李恒吉
Microsoft Word(18Kb)  |  收藏  |  浏览/下载:560/0  |  提交时间:2024/04/16
UNEP  Integrated waste management  Food waste  
UNEP发布《西亚地区食物浪费现状报告》 快报文章
资源环境快报,2021年第15期
作者:  李恒吉
Microsoft Word(19Kb)  |  收藏  |  浏览/下载:502/0  |  提交时间:2021/08/16
Food Waste  West Asia Area  UNEP  
UNEP发布《2021年食物浪费指数报告》 快报文章
资源环境快报,2021年第6期
作者:  刘莉娜
Microsoft Word(15Kb)  |  收藏  |  浏览/下载:496/0  |  提交时间:2021/03/31
UNEP  Food Waste Index  SDG  
Gram-scale bottom-up flash graphene synthesis 期刊论文
NATURE, 2020, 577 (7792) : 647-651
作者:  Long, Haizhen;  Zhang, Liwei;  Lv, Mengjie;  Wen, Zengqi;  Zhang, Wenhao;  Chen, Xiulan;  Zhang, Peitao;  Li, Tongqing;  Chang, Luyuan;  Jin, Caiwei;  Wu, Guozhao;  Wang, Xi;  Yang, Fuquan;  Pei, Jianfeng;  Chen, Ping;  Margueron, Raphael;  Deng, Haiteng;  Zhu, Mingzhao;  Li, Guohong
收藏  |  浏览/下载:11/0  |  提交时间:2020/07/03

Most bulk-scale graphene is produced by a top-down approach, exfoliating graphite, which often requires large amounts of solvent with high-energy mixing, shearing, sonication or electrochemical treatment(1-3). Although chemical oxidation of graphite to graphene oxide promotes exfoliation, it requires harsh oxidants and leaves the graphene with a defective perforated structure after the subsequent reduction step(3,4). Bottom-up synthesis of high-quality graphene is often restricted to ultrasmall amounts if performed by chemical vapour deposition or advanced synthetic organic methods, or it provides a defect-ridden structure if carried out in bulk solution(4-6). Here we show that flash Joule heating of inexpensive carbon sources-such as coal, petroleum coke, biochar, carbon black, discarded food, rubber tyres and mixed plastic waste-can afford gram-scale quantities of graphene in less than one second. The product, named flash graphene (FG) after the process used to produce it, shows turbostratic arrangement (that is, little order) between the stacked graphene layers. FG synthesis uses no furnace and no solvents or reactive gases. Yields depend on the carbon content of the source  when using a high-carbon source, such as carbon black, anthracitic coal or calcined coke, yields can range from 80 to 90 per cent with carbon purity greater than 99 per cent. No purification steps are necessary. Raman spectroscopy analysis shows a low-intensity or absent D band for FG, indicating that FG has among the lowest defect concentrations reported so far for graphene, and confirms the turbostratic stacking of FG, which is clearly distinguished from turbostratic graphite. The disordered orientation of FG layers facilitates its rapid exfoliation upon mixing during composite formation. The electric energy cost for FG synthesis is only about 7.2 kilojoules per gram, which could render FG suitable for use in bulk composites of plastic, metals, plywood, concrete and other building materials.


Flash Joule heating of inexpensive carbon sources is used to produce gram-scale quantities of high-quality graphene in under a second, without the need for a furnace, solvents or reactive gases.


  
Inconvenience cost of waste disposal behavior in South Korea 期刊论文
ECOLOGICAL ECONOMICS, 2017, 140
作者:  Lee, Misuk;  Choi, Hyunhong;  Koo, Yoonmo
收藏  |  浏览/下载:3/0  |  提交时间:2019/04/09
Disposal spot  Food waste  Household waste sorting  Inconvenience cost  Pro-environmental behavior  
Options for Sustainable Food and Agriculture in the EU 科技报告
来源:Ecologic Institute (EU). 出版年: 2013
作者:  Sandra Naumann;  Dr. Ana Frelih-Larsen;  Elizabeth Dooley JD, LLM
收藏  |  浏览/下载:5/0  |  提交时间:2019/04/05
sustainability  agriculture  food security  climate change  adaptation  mitigation  biodiversity  food waste  biotechnology  
Governance Screening of Global Land Use 科技报告
来源:Ecologic Institute (EU). 出版年: 2013
作者:  Stephanie Wunder;  Timo Kaphengst;  Lucy Olivia Smith;  Johanna von Toggenburg
收藏  |  浏览/下载:3/0  |  提交时间:2019/04/05
agriculture  land use  sustainability  policy analysis  governance screening  forestry  climate  resource efficiency  spatial planning  energy  trade  development  diets  food waste  population dynamics