Synthesis of a Core-shell Structured Ag/ZIF-8 Catalyst with Mesoporous Silica Shell†

doi:10.7503/cjcu20170811

Abstract

Abstract:

The self-assembly technique was employed to sythesize the Ag nanoparticles on ZIF-8(Ag/ZIF-8). Cetyltrimethyl ammonium bromide(CTAB) was used as the structure-directing agent to facilitate mesoporous silica to coat on the surface of hydrophobic Ag/ZIF-8(Ag/ZIF-8@MS). The prepared Ag/ZIF-8@MS with a core-shell structure was characterized by a series of measurements. The results show that Ag/ZIF-8@MS has a uniform particle size(Ag/ZIF-8@MS: ca. 100 nm, Ag: ca. 15 nm), high specific surface area(539 m²/g) and large pore volume(0.64 m³/g). The TEM images indicate that the thickness of mesoporous silica shell is ca. 20 nm. The structure of catalyst is transformed into Ag/ZnO@MS core-shell structure after calcination at 550 ℃. Meanwhile, both of the Ag-baesd catalysts were tested for the reaction of 4-nitrophenol to prepare 4-aminophenol. The catalytic results showed that the conversion of 4-nitrophenol catalyzed by Ag/ZIF-8@MS was more than 95%, which proves the advantage of the core-shell structure with ZIF-8 as a carrier.

Key words: ZIF-8, Mesoporous silica, Silver nanoparticles, Core-shell, Catalytic performance

CLC Number:

O643
O611

TrendMD:

XIAO Shanshan, OUYANG Yiting, LI Xiaoyun, WANG Zhao, WU Pan, DENG Zhao, CHEN Lihua, SU Baolian. Synthesis of a Core-shell Structured Ag/ZIF-8 Catalyst with Mesoporous Silica Shell^†[J]. Chem. J. Chinese Universities, 2018, 39(6): 1235.

Figures/Tables 8

Fig.1 SEM images of ZIF-8(A, B) and Ag/ZIF-8(C, D) with different magnifications

Fig.2 TEM(A) and HRTEM(B) images of the Ag/ZIF-8

Fig.3 SEM images of Ag/ZIF-8@MS(A, B) and Ag/ZnO@MS(C, D) with different magnifications

Fig.4 TEM images of Ag/ZIF-8@MS(A, B) and Ag/ZnO@MS(C, D) with different magnifications

Fig.5 XRD patterns of Ag/ZIF-8@MS(a), Ag/ZnO@MS(b), Ag/ZIF-8(c) and ZIF-8(d)

Fig.6 N2 adsorption-desorption isotherms(A, A') and pore size distributions(B, B', C, C') of Ag/ZIF-8@MS(A—C) and Ag/ZnO@MS(A'—C')Profiles (C) and (C') are the enlarged part of profiles (B) and (B'), respectively.

Table 1 Textual properties of Ag/ZIF-8@MS and Ag/ZnO@MS

Sample	S_BET/(m²·g^-1)	Microporous surface area/(m²·g^-1)	V_t/(m³·g^-1)	t-plot microporous volume/(m³·g^-1)
Ag/ZIF-8@MS	539	359	0.64	0.08
Ag/ZnO@MS	350	235	0.34	0.02

Fig.7 UV spectra(A—C) and conversion rate curves(D) of Ag/ZIF-8@MS(A), Ag/ZnO@MS(B) and Ag/ZIF-8(C) in the reaction of nitropheno

References 35

[1]	Long J. R., Yaghi O. M., Chem. Soc. Rev., 2009, 38(5), 1213—1214
[2]	Du T., Long Y., Tang Q., Li S. L., Liu L. Y., Chem. J. Chinese Universities, 2017, 38(2), 225—230
	(杜涛, 龙渊, 汤琦, 李生璐, 刘丽影. 高等学校化学学报, 2017, 38(2), 225—230)
[3]	Duan C. J., Cao Y. M., Jie X. M., Wang L. N., Yuan Q., Chem. J. Chinese Universities, 2014, 35(7), 1584—1589
	(段翠佳, 曹义鸣, 介兴明, 王丽娜, 袁权. 高等学校化学学报, 2014, 35(7), 1584—1589)
[4]	Wang L., Sun Y. X., Miao Y. L., Sun H., Chem. J. Chinese Universities, 2011, 32(3), 758—764
	(王琳, 孙迎新, 苗延霖, 孙淮. 高等学校化学学报, 2011, 32(3), 758—764)
[5]	Xu D., Xiao S. S., Wu P., Pan Y., Chen L. H., Su B. L., Xue M., Qiu S. L., Chem. J. Chinese Universities, 2018, 39(1), 19—24
	(徐丹, 肖珊珊, 吴攀, 潘莹, 陈丽华, 苏宝连, 薛铭, 裘世纶. 高等学校化学学报, 2018, 39(1), 19—24)
[6]	Hu Y. P., Shan D. L., Lu X. Q., Chem. J. Chinese Universities, 2016, 37(6), 1082—1087
	(胡一平, 陕多亮, 卢小泉. 高等学校化学学报, 2016, 37(6), 1082—1087)
[7]	Zhao X., Yin F., Liu N., Li G., Fan T., Chen B., J. Mater. Sci., 2017, 52(17), 10175—10185
[8]	Liu Y., Howarth A. J., Vermeulen N. A., Moon S. Y., Hupp J. T., Farha O. K., Coord. Chem. Rev., 2016, 346, 101—111
[9]	Zheng C. C., Chem. J. Chinese Universities, 2013, 34(11), 2574—2579
	(郑成成. 高等学校化学学报, 2013, 34(11), 2574—2579)
[10]	Zhu L., Liu X. Q., Jiang H. L., Sun L. B., Chem. Rev., 2017, 117(12), 8129—8176
[11]	Lai Q., Zhao Y., Liang Y., He J., Chen J., Adv. Funct. Mater., 2016, 26(45), 8334—8344
[12]	Abbasi Z., Shamsaei E., Leong S. K., Ladewig B., Zhang X., Wang, H., Microporous Mesoporous Mater., 2016, 236, 28—37
[13]	Aijaz A., Fujiwara N., Xu Q., J. Am. Chem. Soc., 2014, 136(19), 6790—6793
[14]	Wang Z., Wang G., Louis C., Delannoy L., J. Catal., 2017, 347, 185—196
[15]	Wan Y., Wang H., Zhao Q., Klingstedt M., Terasaki O., Zhao D., J. Am. Chem. Soc., 2009, 131(12), 4541—4550
[16]	Ren J., Hao P., Sun W., Shi R., Liu S., Chem. Eng. J., 2017, 328, 673—682
[17]	Wen C. Y., Chen J., Li M., Xue Y., Aslam S., Subhan F., Chen X., Microchimica Acta, 2017, 184(10), 3929—3936
[18]	Ding S., Yan Q., Jiang H., Zhong Z., Chen R., Xing W., Chem. Eng. J., 2016, 296, 146—153
[19]	Tang L., Shi J., Wu H., Zhang S., Liu H., Zou H., Jiang Z., Nanotechnology,2017, 28, 365604-1—12
[20]	Mao H., Zhang W., Zhou W., Zou B., Zheng B., Zhao S., Huo F., ACS Appl. Mater. Interf., 2017, 9(29), 24649—24654
[21]	Zhu Q. L., Xu Q., Chem. Soc. Rev., 2014, 43(16), 5468—5512
[22]	Gholampour N., Chaemchuen S., Hu Z.Y., Mousavi B., Van Tendeloo G., Verpoort F., Chem. Eng. J., 2017, 322, 702—709
[23]	Chen L., Zhan W., Fang H., Cao Z., Yuan C., Xie Z., Zheng L., Chem. Eur. J., 2017, 23(47), 11397—11403
[24]	Yang J., Zhao F., Zeng B., RSC Adv., 2016, 6(28), 23403—23410
[25]	Pradhan N., Pal A., Pal T., Colloids Surf. A, 2002, 196(2), 247—257
[26]	Wu X. Q., Wu X. W., Shen J. S., Zhang H. W., RSC Adv., 2014, 4(90), 49287—49294
[27]	Sahiner N., Ozay H., Ozay O., Aktas N., Appl. Catal.A: Gen., 2010, 385(1), 201—207
[28]	Babenko P. Y., Meluzova D. S., Shergin A. P., Zinoviev A. N., Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2017, 406, 460—464
[29]	Jang E., Kim E., Kim H., Lee T., Yeom H. J., Kim Y. W., Choi J., J. Membr. Sci., 2017, 540, 430—439
[30]	Dong S., Tong M., Zhang D., Huang T., Sens. Actuators B: Chem., 2017, 251, 650—657
[31]	Han X. G., Jiang Y. Q., Xie S. F., Kuang Q., Zhou X., Cai D. P., Zheng L. S., J. Phys. Chem. C, 2010, 114(22), 10114—10118
[32]	Abdi J., Vossoughi M., Mahmoodi N. M., Alemzadeh I., Ultrason. Sonochem., 2017, 39, 550—564
[33]	Wu P., Sun M. H., Yu Y., Peng Z., Bulbula S. T., Li Y., Chen L. H., Su, B. L., RSC Adv., 2017, 7(68), 42627—42633
[34]	Sharma M., Hazra S., Basu S., J. Colloid Interf. Sci., 2017, 504, 669—679
[35]	Tian Y., Li W., Zhao C., Wang Y., Zhang B., Zhang Q., Appl. Catal.B: Environ., 2017, 213, 136—146