Influence of Bifunctional PtZn/SiO2 and H-ZSM-5 Catalyst on the Rates and Selectivity of Propene AromatizationAbstract Previous studies on the conversion of olefins to aromatics with bifunctional Ga- or Zn-ZSM-5 catalysts have concluded that benzene, toluene, and xylenes (BTX) yields are significantly higher than for ZSM-5 alone. These results were attributed to the higher aromatic dehydrogenation rate of Ga or Zn. [...] 618 5086 |
Synthesis and Characterization of MCM-41 Nanomaterials Containing Titanium and Application for Catalytic Oxidation of BTEXby
Lidiane A. Morais
,
Francisco L. Castro
,
Glauber J.T. Fernandes
,
Marcio D.S. Araujo
,
Mirna F. Farias
,
Ana P.M.A. Guedes
,
Valter J. Fernandes Jr
and
Antonio S. Araujo
Abstract The TiO2/MCM-41 nanomaterials were synthesized by impregnation with an excess solvent with different percentages of titanium dioxide. They were used for catalytic degradation of Benzene Toluene Ethylbenzene and Xylenes (BTEX) in the presence of hydrogen peroxide in aqueous med [...] 684 5249 |
Obtaining TiO2 Nanostructures by Electrospinning and Analysis of Absorbance in the UVA Spectrum for Photocatalytic Applicationby
Luana Góes Soares
and
Annelise Alves
Abstract The synthesis of fibers by electrospinning allows for obtaining nanostructures of one-dimensional materials with good flexibility, optical and catalytic properties, high surface area and porosity. They can be used in applications such as: catalysts, solar cells, fuel cells, membranes, and hydrogen b [...] 567 4676 |
Organic Structure-Directing Agent Free Synthesis of Mordenite with Seeds, Used as A Support for Mo Catalysts in the Transesterification of Soybean Oilby
Erivaldo Genuíno Lima
,
Fabiana Medeiros Nascimento Silva
,
Tellys Lins Almeida Barbosa
and
Meiry Gláucia Freire Rodrigues
Abstract This work prepared mordenite using seeds and without organic structure-directing agents (OSDAs). The Mo/Mordenite was prepared through wet impregnation and the catalysts’ performance was checked for transesterification of soybean oil with methanol. The mordenite zeolite was prepared through hydrothe [...] 661 5766 |
Spectrophotometric and Spectrofluorimetric Quantification of Urea via Silver Nanoparticles Prepared by Wet Chemical MethodAbstract Silver nanoparticles have been utilized in an easy, sensitive, and effective approach through spectrophotometry and spectrofluorimetry to quantify urea in water samples. Here, 1,3-di-(1H-imidazole-1-yl) -2-propanol (DIPO) was employed to stabilize Ag NPs produced from
1185 8901 |
Cost-Effective Biodiesel Synthesis from Waste Marble Powder as A Green Heterogeneous Catalyst Using Pongamia Pinnata Oilby
Jharna Gupta
and
Madhu Agarwal
Abstract Waste marble powder (WMP) is Investigated for developing heterogeneous catalysts by calcination method and used in biodiesel synthesis by esterification-transesterification process from Pongamia Pinnata oil. Hammet indicators, Fourier transform infrared (FT-IR), Thermogravimetric analysis, and X-ray [...] 871 6614 |
Sustainable Synthesis of Zeolitic Imidazolate Framework-8 Nanoparticles and Application in the Adsorption of the Drug Chlorhexidineby
Heloísa Maria de Oliveira
,
Francisco Alex de Sousa Silva
,
Tellys Lins Almeida Barbosa
and
Meiry Gláucia Freire Rodrigues
Abstract In an attempt to synthesize nanomaterial concerning chemistry, the sustainable synthesis of Zeolitic Imidazolate Framework-8 (ZIF-8) nanoparticles by a low-cost approach through the recycling of waste mother liquors was explored and then indicated the potential to remove chlorhexidine (CHLX) from an [...] 740 6622 |
Morpholine-Based Novel Ionic Liquid for Synthesis and Characterization of Triazolidinethiones and Their Biological Propertiesby
Nilam C. Dige
,
Chandrama S. Randive
,
Omkar S. Tamhane
,
Rushikesh S. Ghorpade
,
Sanjay R. Kale
and
Prasad G. Mahajan
Abstract Keeping the green chemistry approach in mind we have synthesized a novel morpholine-based ionic liquid [NBMMorph]+Br-. The structure of Ionic liquid was confirmed by spectral techniques viz. IR, 1H NMR, and< [...] 780 5990 |
Adsorption of Rhodamine-B (RhB) and Regeneration of MCM-41 Mesoporous Silicaby
Thiago Rodrigo Barbosa Barros
,
Thianne Silva Batista Barbosa
,
Tellys Lins Almeida Barbosa
and
Meiry Gláucia Freire Rodrigues
Abstract Rhodamine (RhB) adsorption was carried out on MCM-41 and MCM-41 calcined. The effect of parameters such as pH was investigated. The reusability potential of MCM-41 was also established and the mechanism of RhB adsorption was discussed. MCM-41 was synthesized and calcined, with all samples characteri [...] 790 6868 |
Methanol Synthesis Catalyst Waste as the Principal Component of New Sustainable Cementless Concreteby
Vsévolod Mymrin
,
Reinaldo H. G. Alarcon
,
Marilia A. Guidolin
,
Kirill Alekseev
,
Rogerio J. Hultmann
,
Walderson Klitzke
,
Karina Q. Carvalho
,
Fernando H. Passig
,
Charles W.I. Haminiuk
and
Rodrigo E. Catai
Abstract Methanol synthesis catalyst (MSC) waste was applied as the principal component (till 70 wt.%) of sustainable ceramics in composites with bauxite processing waste (RM), and waste foundry sand (FS). The results of the initial components' chemical interaction studies by a complex of methods (XRD, SEM/E [...] 622 5624 |