Paving the road toward the use of β-Fe2O3 in solar water splitting: Raman identification,phase transformation and strategies for phase stabilization     

Ningsi Zhang  Xin Wang  Jianyong Feng  Huiting Huang  Yongsheng Guo  Zhaosheng Li  Zhigang Zou 《国家科学评论(英文版)》2020,7(6):1059

Although β-Fe₂O₃ has a high theoretical solar-to-hydrogen efficiency because of its narrow band gap, the study of β-Fe₂O₃ photoanodes for water splitting is elusive as a result of their metastable nature. Raman identification of β-Fe₂O₃ is theoretically and experimentally investigated in this study for the first time, thus clarifying the debate about its Raman spectrum in the literature. Phase transformation of β-Fe₂O₃ to α-Fe₂O₃ was found to potentially take place under laser and electron irradiation as well as annealing. Herein, phase transformation of β-Fe₂O₃ to α-Fe₂O₃ was inhibited by introduction of Zr doping, and β-Fe₂O₃ was found to withstand a higher annealing temperature without any phase transformation. The solar water splitting photocurrent of the Zr-doped β-Fe₂O₃ photoanode was increased by 500% compared to that of the pure β-Fe₂O₃ photoanode. Additionally, Zr-doped β-Fe₂O₃ exhibited very good stability during the process of solar water splitting. These results indicate that by improving its thermal stability, metastable β-Fe₂O₃ film is a promising photoanode for solar water splitting.  相似文献   

Olivine-norite rock detected by the lunar rover Yutu-2 likely crystallized from the SPA-impact melt pool     

Honglei Lin  Zhiping He  Wei Yang  Yangting Lin  Rui Xu  Chi Zhang  Meng-Hua Zhu  Rui Chang  Jinhai Zhang  Chunlai Li  Hongyu Lin  Yang Liu  Sheng Gou  Yong Wei  Sen Hu  Changbin Xue  Jianfeng Yang  Jie Zhong  Xiaohui Fu  Weixing Wan  Yongliao Zou 《国家科学评论(英文版)》2020,7(5):913

Chang’E-4 landed in the South Pole-Aitken (SPA) basin, providing a unique chance to probe the composition of the lunar interior. Its landing site is located on ejecta strips in Von Kármán crater that possibly originate from the neighboring Finsen crater. A surface rock and the lunar regolith at 10 sites along the rover Yutu-2 track were measured by the onboard Visible and Near-Infrared Imaging Spectrometer in the first three lunar days of mission operations. In situ spectra of the regolith have peak band positions at 1 and 2 μm, similar to the spectral data of Finsen ejecta from the Moon Mineralogy Mapper, which confirms that the regolith''s composition of the landing area is mostly similar to that of Finsen ejecta. The rock spectrum shows similar band peak positions, but stronger absorptions, suggesting relatively fresh exposure. The rock may consist of 38.1 ± 5.4% low-Ca pyroxene, 13.9 ± 5.1% olivine and 48.0 ± 3.1% plagioclase, referred to as olivine-norite. The plagioclase-abundant and olivine-poor modal composition of the rock is inconsistent with the origin of the mantle, but representative of the lunar lower crust. Alternatively, the rock crystallized from the impact-derived melt pool formed by the SPA-impact event via mixing the lunar crust and mantle materials. This scenario is consistent with fast-cooling thermal conditions of a shallow melt pool, indicated by the fine to medium-sized texture (<3 mm) of the rock and the SPA-impact melting model [Icarus 2012; 220: 730–43].  相似文献   

我国高技术产业的区域分布失衡问题分析   总被引：1，自引：0，他引：1  

熊英  汤亚非  邹纲明 《现代情报》2010,30(8):157-162

通过对我国高技术产业的绩效数据的分析,其中包括:总产值、主营收入、增加值、新产品产值、利税和出口交货值等多个方面的数据,了解到我国高技术产业在全国区域分布,发现高技术产业集中我国的东部地区,而中部和西部在高技术领域处于明显劣势,严重影响我国高技术产业的均衡发展。据此建议国家应该尽快调整高技术的产业结构,让高技术产业成果,带给中部和西部的人民一些经济实惠。  相似文献   

《企业经营战略》精品课程建设探讨     

邹树梁 《当代教育论坛》2010,(16)

精品课程是集科学性、先进性、教育性、整体性、有效性和示范性于一体的品牌课程.精品课程的建设体现了现代的教育教学思想,符合现代科学技术和社会发展进步的需要,能够促进学生的全面发展,带动高等教育教学改革.南华大学<企业经营战略>课程组制定了科学的课程建设规划,经过了多年的努力,取得明显成果.教师的学历层次、教学科研能力明显提高,教学条件显著改善,学生的综合能力明显加强,形成了独具特色的实践教学课程体系.  相似文献   

基于MC55远程便携报警系统的研制     

邹立峰  姚永波  张启升 《中国科技信息》2010,(6):131-133

分析市场现有报警仪器的缺点,介绍了一种基于增强型微控制器C8051F020控制GSM引擎对远程、便携式报警系统的成功实现.从电源部分、传感器部分、微控制器部分、GSM无线模块等硬件部分和软件部分分别进行了详细的论述.  相似文献   

面向供应链管理的图书馆业务流程重组   总被引：10，自引：0，他引：10       下载免费PDF全文

邹凯  何岸  陈能华 《中国图书馆学报》2005,31(4)

供应链管理概念框架由供应链网络结构、供应链业务流程及供应链管理组件三个要素构成。图书馆面向供应链管理很有必要。目前图书馆实施供应链管理存在缺乏主观能动性、缺乏竞争的科学意识及健全的运行保障体系等。面向供应链管理的图书馆业务流程重组,首先要进行供应链系统重整,然后进行业务流程重组。图3。参考文献8。  相似文献   

刍议行政区划调整后公共图书馆的合并问题     

邹琦 《图书馆建设》2007,(2):13-15

文章就行政区划调整后公共图书馆的合并模式及合并后应注意的问题进行了分析  相似文献   

图书情报学教育的转型——国外图书情报学教育改革研究之观察     

邹永利 《图书馆》2007,(6):25-28

文章在评介LIPER、KALIPER、CILIP课程认可标准以及IFLA的专业教育指南等几个有影响的图书情报学教育研究课题的基础上，讨论了图书情报学教育向情报学教育转型的趋势、转型过程中出现的学科定位、师资知识结构问题等，并在结语部分简单分析了图书情报学专业所面临的困境。  相似文献   

图书馆的开放获取策略研究   总被引：1，自引：0，他引：1  

刘鑫  王永丽  刘莉 《河南图书馆学刊》2007,27(5):11-13

论述开放获取的含义、特点和必要性,归纳分析了面对开放获取的新模式,图书馆应采用的应对策略.  相似文献   

中文报纸人机通用无号排序法   总被引：4，自引：2，他引：2  

袁国发  邹华  焦志芬  袁立军 《图书情报工作》2002,46(7):71-74

将"中文期刊刊名汉语拼音首字母-全拼排序法"及国家新闻出版署报纸"类别代码"引入中文报纸的排序,实现了中文报纸报名排序的统一和分类排序的统一,以及中文报纸手工排序和计算机排序的统一;实现了中文报纸报名的计算机快速检索,将中文报名的计算机检索速度提高到了比用全拼检索一个汉字还要高的程度.  相似文献