The controllable synthesis of tantalate K1.9Na0.1Ta2O6·2H2O has been successfully achieved by a two-step technique,namely,the molten salt and hydrothermal methods,at a low temperature. By simply varying the KOH c...The controllable synthesis of tantalate K1.9Na0.1Ta2O6·2H2O has been successfully achieved by a two-step technique,namely,the molten salt and hydrothermal methods,at a low temperature. By simply varying the KOH concentration in the hydrothermal process,K1.9Na0.1Ta2O6·2H2O particles with spherical,cuboctahedral,and durian-like morphologies were synthesized. The photocatalytic activity of the obtained samples for the degradation of rhodamine B was studied under ultraviolet light,which indicates that the photocatalytic properties of the samples are highly dependent on their morphologies. The K1.9Na0.1Ta2O6·2H2O nanospheres,with rough surfaces and the highest specific surface area,exhibit the best performance. The present work provides a unique approach for the controlled synthesis of tantalate photocatalysts,which are difficult to achieve through other synthetic approaches.展开更多
高校专业的设置和专业的培养要适应地方社会经济的发展,文章以西北某高校环境科学与工程专业为例,对近五年学生的就业单位、单位就业人数进行了统计分析。并以近五年毕业生为样本,采取问卷调查、电话访谈、实地调研等形式对毕业生在工...高校专业的设置和专业的培养要适应地方社会经济的发展,文章以西北某高校环境科学与工程专业为例,对近五年学生的就业单位、单位就业人数进行了统计分析。并以近五年毕业生为样本,采取问卷调查、电话访谈、实地调研等形式对毕业生在工作中哪些知识和能力用到的最多,哪些课程在工作中的应用较多等问题进行调研。根据调研结果,分析环境专业毕业生应该具有的专业核心能力,并从专业核心能力出发,分析环境专业毕业生所需要的专业能力要素,并以此构建课程模块体系,为环境专业学生的综合能力培养优化提出了对策建议。The establishment and training of university majors should adapt to the development of local social economy. Taking the environmental science and engineering major of a certain university in Northwest China as an example, this article conducted a statistical analysis of the employment units and the number of employees of students in the past five years. And taking the graduates in the past five years as samples, we conducted a survey on which knowledge and abilities are most used by graduates in their work, and which courses are more widely used in their work through questionnaire surveys, telephone interviews, and field surveys. According to the survey results, we analyzed the professional core abilities that environmental graduates should have, and based on the professional core abilities, we analyzed the professional ability elements required by environmental graduates, and constructed a course module system based on this, and put forward countermeasures and suggestions for optimizing the comprehensive ability training of environmental students.展开更多
基金supported by the National Natural Science Foundation of China(U140319321473261+3 种基金41305112)the Excellent Youth Foundation of Xinjiang Uygur Autonomous Region(2013711004)the CAS "Light of West China" Program(YB201303)the CAS/SAFEA International Partnership Program for Creative Research Teams~~
文摘The controllable synthesis of tantalate K1.9Na0.1Ta2O6·2H2O has been successfully achieved by a two-step technique,namely,the molten salt and hydrothermal methods,at a low temperature. By simply varying the KOH concentration in the hydrothermal process,K1.9Na0.1Ta2O6·2H2O particles with spherical,cuboctahedral,and durian-like morphologies were synthesized. The photocatalytic activity of the obtained samples for the degradation of rhodamine B was studied under ultraviolet light,which indicates that the photocatalytic properties of the samples are highly dependent on their morphologies. The K1.9Na0.1Ta2O6·2H2O nanospheres,with rough surfaces and the highest specific surface area,exhibit the best performance. The present work provides a unique approach for the controlled synthesis of tantalate photocatalysts,which are difficult to achieve through other synthetic approaches.
文摘高校专业的设置和专业的培养要适应地方社会经济的发展,文章以西北某高校环境科学与工程专业为例,对近五年学生的就业单位、单位就业人数进行了统计分析。并以近五年毕业生为样本,采取问卷调查、电话访谈、实地调研等形式对毕业生在工作中哪些知识和能力用到的最多,哪些课程在工作中的应用较多等问题进行调研。根据调研结果,分析环境专业毕业生应该具有的专业核心能力,并从专业核心能力出发,分析环境专业毕业生所需要的专业能力要素,并以此构建课程模块体系,为环境专业学生的综合能力培养优化提出了对策建议。The establishment and training of university majors should adapt to the development of local social economy. Taking the environmental science and engineering major of a certain university in Northwest China as an example, this article conducted a statistical analysis of the employment units and the number of employees of students in the past five years. And taking the graduates in the past five years as samples, we conducted a survey on which knowledge and abilities are most used by graduates in their work, and which courses are more widely used in their work through questionnaire surveys, telephone interviews, and field surveys. According to the survey results, we analyzed the professional core abilities that environmental graduates should have, and based on the professional core abilities, we analyzed the professional ability elements required by environmental graduates, and constructed a course module system based on this, and put forward countermeasures and suggestions for optimizing the comprehensive ability training of environmental students.
