Good psychological quality is an integral part of the overall quality of the contemporary college students, which is also an important foundation for their healthy growth and success. However, according to the investi...Good psychological quality is an integral part of the overall quality of the contemporary college students, which is also an important foundation for their healthy growth and success. However, according to the investigation, in reality, many college students have various degrees of psychological problems, seriously affecting their normal learning and living. This article makes an in-depth discussion based on the analysis of contemporary college students＇ psychological quality system; in order to strengthen the mental health education and improve the students＇ adaptability.展开更多
Encompassing ecological and economic concerns, the utilization of biomass to produce carbonaceous materials has attracted intensive research and industrial interest. Using nitrogen containing precursors could realize ...Encompassing ecological and economic concerns, the utilization of biomass to produce carbonaceous materials has attracted intensive research and industrial interest. Using nitrogen containing precursors could realize an in situ and homogeneous incorporation of nitrogen into the carbonaceous materials with a controlled process. Herein, N-doped hollow core-disordered mesoporous shell carbonaceous nanospheres （HCDMSs） were synthesized from glucosamine hydrochloride （GAH）, an applicable carbohydrate-based derivative. The obtained HCDMSs possessed controlled size （-450-50 nm） and shell thickness （-70-10 nm）, suitable nitrogen contents （-6.7-4.4 wt.%）, and Brunauer-Emmett-Teller （BET） surface areas up to 770 m^2.g^-1. These materials show excellent electrocatalytic activity as a metal-free catalyst for the oxygen reduction reaction （ORR） in both alkaline and acidic media. Specifically, the prepared HCDMS-1 exhibits a high diffusion-limited current, and superior durability and better immunity towards methanol crossover and CO poisoning for ORR in alkaline solution than a commercial 20 wt.% Pt/C catalyst.展开更多
文摘Good psychological quality is an integral part of the overall quality of the contemporary college students, which is also an important foundation for their healthy growth and success. However, according to the investigation, in reality, many college students have various degrees of psychological problems, seriously affecting their normal learning and living. This article makes an in-depth discussion based on the analysis of contemporary college students＇ psychological quality system; in order to strengthen the mental health education and improve the students＇ adaptability.
基金Financial support from the National Natural Science Foundation of China （Ul162124 ＆ 21376208）, the Zhejiang Provincial Natural Science Foundation for Distinguished Young Scholars of China （LR13B030001）, the Specialized Research Fund for the Doctoral Program of Higher Education （J20130060）, the Fun- damental Research Funds for the Central Universities, the Program for Zhejiang Leading Team of S＆T Innovation, the Partner Group Program of the Zhejiang University and the Max-Planck Society are greatly appreciated.
文摘Encompassing ecological and economic concerns, the utilization of biomass to produce carbonaceous materials has attracted intensive research and industrial interest. Using nitrogen containing precursors could realize an in situ and homogeneous incorporation of nitrogen into the carbonaceous materials with a controlled process. Herein, N-doped hollow core-disordered mesoporous shell carbonaceous nanospheres （HCDMSs） were synthesized from glucosamine hydrochloride （GAH）, an applicable carbohydrate-based derivative. The obtained HCDMSs possessed controlled size （-450-50 nm） and shell thickness （-70-10 nm）, suitable nitrogen contents （-6.7-4.4 wt.%）, and Brunauer-Emmett-Teller （BET） surface areas up to 770 m^2.g^-1. These materials show excellent electrocatalytic activity as a metal-free catalyst for the oxygen reduction reaction （ORR） in both alkaline and acidic media. Specifically, the prepared HCDMS-1 exhibits a high diffusion-limited current, and superior durability and better immunity towards methanol crossover and CO poisoning for ORR in alkaline solution than a commercial 20 wt.% Pt/C catalyst.
