在半封闭系统中采用直接热解三聚氰胺的方法制备了C3N4,XRD、XPS及元素分析的结果证明了产物是类石墨相C3N4(g-C3N4).用热分析(TG/DTG)研究了g-C3N4的热分解过程.通过迭代法计算了热分解反应活化能Ea,采用积分法结合36种动力学函数来判断g-C3N4热分解的机理函数.计算结果表明,g-C3N4的平均热分解活化能Ea为178.59kJ/mol,可能的动力学函数积分形式是g(a)=[-In(1-a)]4,指前因子A为21.67s-1,对应的热分解动力学方程为:dα/dT=(21.67/β)exp(-178.59×103/RT)×1/4(1-α)[-ln(1-α]-3
参考文献
[1] | Lim S H;Elim H I;Gao X Y et al.[J].Physical Review B,2006,73:045402-0(1-6). |
[2] | Zimmerman L;Robert W;Valery N et al.[J].Nano Letters,2001,1(12):731-734. |
[3] | Stephen M;Yuta N;Shogo M et al.[J].Journal of Physical Chemistry C,2009,113:20148-20151. |
[4] | Malek D;Paul F;Furio C .[J].Journal of Physical Chemistry C,2008,112:5447-5453. |
[5] | Anna F;Jens O;Markus A .[J].Nano,2008,2(12):2489-2496. |
[6] | Guo QX.;Xie Y.;Wang XJ.;Lv SC.;Hou T.;Liu XM. .Characterization of well-crystallized graphitic carbon nitride nanocrystallites via a benzene-thermal route at low temperatures[J].Chemical Physics Letters,2003(1/2):84-87. |
[7] | Zhao Y C;Yu D L;Zhou H W et al.[J].Journal of Materials Science,2005,40:2645-2647. |
[8] | Miller D;WangJ J;Gillan E .[J].Journal of Materials Chemistry,2002,12:2463-2469. |
[9] | Khabashesku V;Zimmerman J;Margrave J .[J].Chemistry of Materials,2000,12:3264-3270. |
[10] | 李杰,曹传宝,朱鹤荪.三维大孔氮化碳材料的制备及其血液相容性[J].北京科技大学学报,2007(02):142-145. |
[11] | Li, XF;Zhang, J;Shen, LH;Ma, YM;Lei, WW;Cui, QL;Zou, GT .Preparation and characterization of graphitic carbon nitride through pyrolysis of melamine[J].Applied physics, A. Materials science & processing,2009(2):387-392. |
[12] | Kandelbauera A;Wuzellab G;Mahendranb A .[J].Chemical Engineering Journal,2009,152:556-565. |
[13] | 胡荣祖;史启祯.热分析动力学[M].北京:科学出版社,2001 |
[14] | Li L Q;Chen D H .[J].Journal of Thermal Analysis and Calorimetry,2004,78:283-293. |
[15] | L. Vlaev;N. Nedelchev;K. Gyurova;M. Zagorcheva .A comparative study of non-isothermal kinetics of decomposition of calcium oxalate monohydrate[J].Journal of analytical & applied pyrolysis,2008(2):253-262. |
[16] | Li Z J;Shen X Q;Feng X et al.[J].Thermochimica Acta,2005,438:102-106. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%