Fe3O4 nanocubes assembled on RGO nanosheets: Ultrasound induced in-situ and eco-friendly synthesis, characterization and their excellent catalytic performance for the production of liquid fuel in Fischer-tropsch synthesis

被引:34
作者
Abbas, Mohamed [1 ,2 ]
Zhang, Juan [1 ]
Lin, Ke [3 ]
Chen, Jiangang [1 ]
机构
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China
[2] Natl Res Ctr, Ceram Dept, El Bohouth St, Cairo 12622, Egypt
[3] San Ju Environm Co, Beijing, Peoples R China
关键词
RGO/Fe(3)O(4)NSs; chi-Fe5C2; Catalysis; Fischer-tropsch synthesis; Hydrothermal; Sonochemical; GRAPHENE OXIDE; IRON CATALYST; CARBON NANOTUBES; SUPPORTED FE; NANOPARTICLES; REDUCTION; FACILE; EVOLUTION; FABRICATION; G-C3N4;
D O I
10.1016/j.ultsonch.2017.11.031
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
In this study, Fe3O4 nanocubes (NCs) decorated on RGO nanosheets (NSs) structures were successfully synthesized through an innovative and environmentally-friendly rapid sonochemical method. More importantly, iron (II) sulfate heptahydrate and GO were employed as precursors and water as reaction medium, meanwhile, NaOH within the generated free radicals from the high intensity ultrasound were sufficient as reducing and base agent in our clean synthesis. Moreover, the hydrothermal method as a conventional approach was employed to synthesize the same catalysts for the comparison with the ultrasonocation technique. The as-synthesized Fe3O4 and RGO/Fe3O4 NSs catalysts were exposed to industrially relevant Fischer-tropsch synthesis (FTS) conditions at various reaction temperatures (250-290 degrees C), and they subjected to fully characterization before and after FTS reaction using XRD, TEM, HRTEM, EDS mapping, XPS, FTIR, BET, H-2-TPR, H2-TPD and CO-TPD to understand the structure-performance relationships. Notably, the catalysts produced using the sonochemical method had a better CO conversion rate (Fe3O4 (80%), RGO/Fe3O4 (82%)] than the hydrothermally synthesized catalysts. However, compared to the naked-Fe3O4 catalysts, the sonochemically and hydrothermally synthesized RGO-supported Fe3O4 catalysts had higher long chain hydrocarbon (C5 +) selectivity values (72% and 67%) and C-2-C-4 olefin/paraffin selectivity ratio (3.2 and 2) and low CH4 selectivity values (6% and 8.5%), respectively. This can be attributed to their high surface area, the degree of reducibility, and content of Hagg iron carbide (chi-Fe5C2) as the most active phase of the FTS reaction. Proposed reaction mechanisms for the sonochemical and hydrothermal reaction synthesis of Fe3O4 and RGO/Fe3O4 nanoparticles are discussed. In conclusion, our developed surfactantless-sonochemical method holds promise for the eco-friendly synthesis of highly efficient catalysts materials for FTS reaction.
引用
收藏
页码:271 / 282
页数:12
相关论文
共 43 条
[1]   A novel and rapid approach for the synthesis of biocompatible and highly stable Fe3O4/SiO2 and Fe3O4/C core/shell nanocubes and nanorods [J].
Abbas, Mohamed ;
RamuluTorati, Sri ;
Iqbal, Shawl Asif ;
Kim, CheolGi .
NEW JOURNAL OF CHEMISTRY, 2017, 41 (07) :2724-2734
[2]   A novel approach for the synthesis of ultrathin silica-coated iron oxide nanocubes decorated with silver nanodots (Fe3O4/SiO2/Ag) and their superior catalytic reduction of 4-nitroaniline [J].
Abbas, Mohamed ;
Torati, Sri Ramulu ;
Kim, CheolGi .
NANOSCALE, 2015, 7 (28) :12192-12204
[3]   Facile sonochemical synthesis of high-moment magnetite (Fe3O4) nanocube [J].
Abbas, Mohamed ;
Takahashi, Migaku ;
Kim, CheolGi .
JOURNAL OF NANOPARTICLE RESEARCH, 2013, 15 (01)
[4]   Ultra-sensitive 2-nitrophenol detection based on reduced graphene oxide/ZnO nanocomposites [J].
Alam, Mohammad K. ;
Rahman, Mohammed M. ;
Abbas, Mohamed ;
Torati, Sri Ramulu ;
Asiri, Abdullah M. ;
Kim, Dojin ;
Kim, CheolGi .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2017, 788 :66-73
[5]  
[Anonymous], ULTRASON SONOCHEM
[6]  
Bagri A, 2010, NAT CHEM, V2, P581, DOI [10.1038/NCHEM.686, 10.1038/nchem.686]
[7]   Applications of Ultrasound to the Synthesis of Nanostructured Materials [J].
Bang, Jin Ho ;
Suslick, Kenneth S. .
ADVANCED MATERIALS, 2010, 22 (10) :1039-1059
[8]  
Banhart F, 2011, ACS NANO, V5, P26, DOI [10.1021/nn102598m, 10.1016/B978-0-08-102053-1.00005-3]
[9]   Effect of the activation atmosphere on the activity of Fe catalysts supported on SBA-15 in the Fischer-Tropsch Synthesis [J].
Cano, Leonardo A. ;
Cagnoli, Maria V. ;
Bengoa, Jose F. ;
Alvarez, Ana M. ;
Marchetti, Sergio G. .
JOURNAL OF CATALYSIS, 2011, 278 (02) :310-320
[10]   Origin of selectivity switch in Fischer-Tropsch synthesis over Ru and Rh from first-principles statistical mechanics studies [J].
Chen, Jia ;
Liu, Zhi-Pan .
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (25) :7929-7937