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2018 Volume 33 Issue 2
2018, 33(2): 1-11
doi: 10.3866/PKU.DXHX201709028
Abstract:
Rationally designed graphitic carbon nitride-based nanocomposites have excellent electronic structures and photoelectrochemical properties. These functionalized materials have been considered as a favorite in the electrocatalytic field, but not limited to the photocatalysis research. The electrochemical performance can be inspired by synergistic effect of composites significantly owing to design of nanostructures. With the key points of nanostructure design, the fabrication, structure and performance of the electrode materials were summarized aiming at electrochemical energy storage and sensors. This review would provide the ideas of scientific design of g-C3N4-based nanocomposites.
Rationally designed graphitic carbon nitride-based nanocomposites have excellent electronic structures and photoelectrochemical properties. These functionalized materials have been considered as a favorite in the electrocatalytic field, but not limited to the photocatalysis research. The electrochemical performance can be inspired by synergistic effect of composites significantly owing to design of nanostructures. With the key points of nanostructure design, the fabrication, structure and performance of the electrode materials were summarized aiming at electrochemical energy storage and sensors. This review would provide the ideas of scientific design of g-C3N4-based nanocomposites.
2018, 33(2): 12-17
doi: 10.3866/PKU.DXHX201708024
Abstract:
Thermodynamics of materials is a graduate course for students majoring in chemistry, chemical engineering, materials sciences and engineering in Harbin Institute of Technology. Through the selection and adjustment of teaching materials and content and combination of curriculum teaching and scientific research, optimization teaching content of basic knowledge and research achievement, the advanced teaching mode is proposed in order to improve students' interest, innovation cultivation of diverse thinking and independent scientific research ability.
Thermodynamics of materials is a graduate course for students majoring in chemistry, chemical engineering, materials sciences and engineering in Harbin Institute of Technology. Through the selection and adjustment of teaching materials and content and combination of curriculum teaching and scientific research, optimization teaching content of basic knowledge and research achievement, the advanced teaching mode is proposed in order to improve students' interest, innovation cultivation of diverse thinking and independent scientific research ability.
2018, 33(2): 18-21
doi: 10.3866/PKU.DXHX201708006
Abstract:
In students' opinion, organic chemistry is a complex and difficult course. However, reasonable teaching design and teaching methods will help students overcome daunting psychology, and cultivate researchers' love for organic chemistry. How to teach? Based on the teaching seminar of organic chemistry and the authors' teaching experiences, the insights of young teachers for organic chemistry teaching are stated in detail.
In students' opinion, organic chemistry is a complex and difficult course. However, reasonable teaching design and teaching methods will help students overcome daunting psychology, and cultivate researchers' love for organic chemistry. How to teach? Based on the teaching seminar of organic chemistry and the authors' teaching experiences, the insights of young teachers for organic chemistry teaching are stated in detail.
2018, 33(2): 22-28
doi: 10.3866/PKU.DXHX201709001
Abstract:
Structural chemistry is a main and important curriculum for undergraduates in chemistry. In this paper, based on the students' interest in learning and the characteristics of the curriculum, introducing experiments of quantum chemistry calculation were proposed and applied in structural chemistry teaching. According to the key points and difficult points in the syllabus of structural chemistry, four basic experiments of quantum chemical calculation were designed and elaborated with detailed contents and implementation details. The teaching reform enables students to solve and understand chemical problems with the knowledge of structural chemistry and the computer as the instrument, thus improving the students' learning interest and the teaching effect.
Structural chemistry is a main and important curriculum for undergraduates in chemistry. In this paper, based on the students' interest in learning and the characteristics of the curriculum, introducing experiments of quantum chemistry calculation were proposed and applied in structural chemistry teaching. According to the key points and difficult points in the syllabus of structural chemistry, four basic experiments of quantum chemical calculation were designed and elaborated with detailed contents and implementation details. The teaching reform enables students to solve and understand chemical problems with the knowledge of structural chemistry and the computer as the instrument, thus improving the students' learning interest and the teaching effect.
2018, 33(2): 29-35
doi: 10.3866/PKU.DXHX201709024
Abstract:
The achievement of laboratory teaching objectives depends on scientific and rigorous experimental process management. The instruction manual of chemical experiments was formulated and strictly implemented in the fundamental chemistry experiment center of Dalian University of Technology, which strengthens the experimental process management and therefore fosters the students' consciousness of experiment safety and environmental protection. Every experimental section is included in the assessment category in order to train students' good experimental habits, standardize the experimental report writing and improve their innovative thinking ability. These measures effectively monitor and guarantee the quality of laboratory teaching.
The achievement of laboratory teaching objectives depends on scientific and rigorous experimental process management. The instruction manual of chemical experiments was formulated and strictly implemented in the fundamental chemistry experiment center of Dalian University of Technology, which strengthens the experimental process management and therefore fosters the students' consciousness of experiment safety and environmental protection. Every experimental section is included in the assessment category in order to train students' good experimental habits, standardize the experimental report writing and improve their innovative thinking ability. These measures effectively monitor and guarantee the quality of laboratory teaching.
2018, 33(2): 36-39
doi: 10.3866/PKU.DXHX201709031
Abstract:
Exploration and practice are summarized based on teaching contents, teaching methods and assessment mechanism in the curriculum construction of structural chemistry, and the possible ways to improve the teaching effect are also discussed.
Exploration and practice are summarized based on teaching contents, teaching methods and assessment mechanism in the curriculum construction of structural chemistry, and the possible ways to improve the teaching effect are also discussed.
2018, 33(2): 40-42
doi: 10.3866/PKU.DXHX201710011
Abstract:
Small-class discussion on the principle of superposition in structural chemistry is briefly introduced and problems to which attention should be paid to are proposed.
Small-class discussion on the principle of superposition in structural chemistry is briefly introduced and problems to which attention should be paid to are proposed.
2018, 33(2): 43-46
doi: 10.3866/PKU.DXHX201710010
Abstract:
Public optional courses are an important part of the curriculum system of higher education, and play an important role in the quality education of college students. Chemistry and life is a public optional course for non-chemical majors, and includes chemical theory related to basic necessities of life. In this paper, national standard documents are introduced into the instructional design. This work can guide students to understand national standard documents and use them to analyze problems. In this way, the students are able to objectively recognize chemistry and its importance in life, as well as know how to avoid the hazards of chemicals. Simultaneously, scientific literacy of students can also be cultivated, so that students can learn to use chemistry to improve their lives.
Public optional courses are an important part of the curriculum system of higher education, and play an important role in the quality education of college students. Chemistry and life is a public optional course for non-chemical majors, and includes chemical theory related to basic necessities of life. In this paper, national standard documents are introduced into the instructional design. This work can guide students to understand national standard documents and use them to analyze problems. In this way, the students are able to objectively recognize chemistry and its importance in life, as well as know how to avoid the hazards of chemicals. Simultaneously, scientific literacy of students can also be cultivated, so that students can learn to use chemistry to improve their lives.
2018, 33(2): 47-59
doi: 10.3866/PKU.DXHX201710005
Abstract:
In this paper, the origin, selection and awarding ceremony of Nobel Prizes are introduced, and the list of Nobel laureates in Chemistry over the years is provided.
In this paper, the origin, selection and awarding ceremony of Nobel Prizes are introduced, and the list of Nobel laureates in Chemistry over the years is provided.
2018, 33(2): 60-64
doi: 10.3866/PKU.DXHX201708001
Abstract:
The ammonia usage in CaO2 preparation through CaCl2 and H2O2 was investigated by the reaction thermodynamics and the designed experiments. The results show that calcium peroxide production is related with the ammonia usage. When the molar ratio of NH3/Ca2+ is less than 2, CaCl2 could not converse completely. With the molar ratio of NH3/Ca2+ reaching 2,high amount of CaO2 and small amount of Ca(OH)3 were achieved. This molar ratio of 2 is suggested to be reasonable in the CaO2 preparation design.
The ammonia usage in CaO2 preparation through CaCl2 and H2O2 was investigated by the reaction thermodynamics and the designed experiments. The results show that calcium peroxide production is related with the ammonia usage. When the molar ratio of NH3/Ca2+ is less than 2, CaCl2 could not converse completely. With the molar ratio of NH3/Ca2+ reaching 2,high amount of CaO2 and small amount of Ca(OH)3 were achieved. This molar ratio of 2 is suggested to be reasonable in the CaO2 preparation design.
2018, 33(2): 65-69
doi: 10.3866/PKU.DXHX201709040
Abstract:
We discussed the advantages of the management modes of Basic Experiment Teaching Center of Shaanxi Normal University and expound the operation modes of multidisciplinary integrated experimental teaching center. The management modes are beneficial to integration and sharing of the limited laboratory teaching resources, to the promotion of college laboratory instruction, to improving the teaching quality, and to the implement of the teaching philosophy of people-oriented.
We discussed the advantages of the management modes of Basic Experiment Teaching Center of Shaanxi Normal University and expound the operation modes of multidisciplinary integrated experimental teaching center. The management modes are beneficial to integration and sharing of the limited laboratory teaching resources, to the promotion of college laboratory instruction, to improving the teaching quality, and to the implement of the teaching philosophy of people-oriented.
2018, 33(2): 70-74
doi: 10.3866/PKU.DXHX201709016
Abstract:
Using molecular modeling software, the procedures for making VRML models of chair-cyclohexan with symmetry elements have been discussed. The interactivities of VRML can help students to grasp the 3D molecular structures and the distribution of symmetry elements intuitively, and substantially improve the teaching results of molecular symmetry.
Using molecular modeling software, the procedures for making VRML models of chair-cyclohexan with symmetry elements have been discussed. The interactivities of VRML can help students to grasp the 3D molecular structures and the distribution of symmetry elements intuitively, and substantially improve the teaching results of molecular symmetry.
2018, 33(2): 75-81
doi: 10.3866/PKU.DXHX201710002
Abstract:
This paper mainly introduces the experience and enlightenment learned during my visiting study at the teaching laboratories of chemistry department, Johns Hopkins University. Through the visiting study, we can find that some aspects, such as systematic and comprehensive laboratory safety education, effective laboratory safety management, laboratory and household waste classification approach, network-assisted laboratory teaching mode and laboratory class performance assessment are worth learning.
This paper mainly introduces the experience and enlightenment learned during my visiting study at the teaching laboratories of chemistry department, Johns Hopkins University. Through the visiting study, we can find that some aspects, such as systematic and comprehensive laboratory safety education, effective laboratory safety management, laboratory and household waste classification approach, network-assisted laboratory teaching mode and laboratory class performance assessment are worth learning.
2018, 33(2): 82-92
doi: 10.3866/PKU.DXHX2017110362
Abstract:
