Sintesis dan Karakterisasi Enkapsulat Katalis Nikel (II) pada Silika Mesopori Modifikasi

Abstract

Ni(II)-BF3/MCM-41 was synthesized for heterogeneous catalyst. The boron trifluoride modified mesoporous silica BF3/MCM-41 was studied to investigate its ability as supporting agent in heterogeneous catalysis system. For this purpose, the structural directing agent remaining in as-synthesis MCM-41 removed by solvent extraction. Surface modification of mesoporous silica MCM-41 with aniline and boron trifluoride was carried out. Then, the surface of boron trifluoride modified mesoporous silica was subjected to an encapsulation with Ni(II) ions. These solid materials were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and atomic absorption spectroscopy (AAS). In the FTIR spectra of the modified silica mesoporous, the presence of vibration band >Si-O-B confirm the success of modification of support. While, the shifting of the vibration band >Si-O-Si< is considered an indication of the proof of Ni(II) species onto the modified mesoporous silica. From the SEM photograph, it can be seen that the morphology of the Ni(II)-BF3/MCM-41 tend to form aggregates of smaller particles. Based on measurement of metal content by AAS, it was known that the value of metal loading is 33%. While for the leaching test, Ni(II)-BF3/MCM-41 lost only 0.014 % of Ni metal. It indicates the stability of the interaction between the N(II) and support of the modified mesoporous silica.

Synthesis of MCM-41 Silica Mesoporous Modified with Zn Metal

“…MCM-41 particles tend to aggregate as much as possible with a uniform spherical shape, whereas Zn-MCM-41 particles tend to become stacked aggregates with a smaller size. The same thing was also reported by Admi et al [23] that the Zn ion in the MCM-41 framework influences the form of weak electrostatic repulsion so that the particle size tends to be smaller. EDS analysis can be implemented to determine the chemical composition and distribution of Zn metal in the MCM-41 [24].…”

“…SEM characterization aimed to determine the surface morphology of the synthesized material. SEM images can show the particle shape of mesoporous silica in the form of spheric aggregates with a relatively uniform shape [23]. The results of SEM characterization of the synthesized material are presented in Figure 2.…”

Separation of Kaolinite from Clay Minerals and Its Catalytic Activity in Transesterification Reactions

“…The kaolinite fraction was thermally activated by calcining at 850 °C for 4 hours. After that, the sample was left at room temperature and then ground (Admi et al, 2020). The sample Hydrogen: Jurnal Kependidikan Kimia, February 2024, 12(1) |18…”

Perkembangan Sintesis MCM-41 Berbasis Sumber Daya Alam dan Aplikasinya: Sebuah Telaah Pustaka

“…Senyawa MCM yaitu Mobile Crystalline Materials adalah jenis material baru yang mempunyai struktur mesopori dan diameter yang seragam [1]. MCM-41, MCM-48 dan SBA-15 adalah beberapa contoh silika mesopori yang telah banyak dikenal dan jenis ini berkarakteristik mempunyai luas permukaan yang besar [2]. Terdapat beberapa metode sintesis MCM-41 yang dapat digunakan baik sintesis konvensional hidrotermal maupun sintesis tidak langsung.…”