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All Journal Jurnal Periodic Edukimia CHEDS: Journal of Chemistry, Education, and Science
Miftahul Khair
Universitas Negeri Padang
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Energy Materials Science & Nanotechnology Other

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Journal : Jurnal Periodic

 1 
Sintesis dan Karakterisasi Karbon Aktif dari Ampas Tebu Diaktivasi menggunakan Gelombang Mikro Hendra Zalmi; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 10, No 2 (2021): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1245.592 KB) | DOI: 10.24036/p.v10i2.112388

Abstract

Synthesis of activated carbon and physical activation using microwaves. Sugarcane bagasse is carbonized at a temperature of 250 oC for ninety minutes and is activated using microwaves which refer to the principles of green chemistry. Microwave one of the electromagnetic waves that can be at a frequency of 2450 khz. Microwaves are able to work as activator of 450 watts of activated carbon for two minutes and the iodine number is from 203.0560 mg / g to 836.9365 mg / g which meets the indonesian national standard no 06-3730-1995 which is 750 mg / g. Activated carbon was characterized optimally using a FTIR spectrophotometer. The spectra results show the presence of a functional group -OH at wave number 3350-3252 cm-1, C=C at wave number 1570-1320 cm-1, C-O at wave number 1300-900 cm-1, and ch at wave number 995-670 cm-1. Adsorption of activated carbon against rhodamine dye obtained optimal conditions with a concentration of 350 mg / L, time of 120 minutes which has an adsorption capacity of 7.251724 mg / g.
Adsorpsi Anion Nitrat Menggunakan Silika Gel (SiO2) GPTMS Dimodifikasi dengan Dimetilamina Anisa Nahari; Budhi Oktavia; Miftahul Khair; Ananda Putra
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115920

Abstract

Silica or silicon dioxide is a chemical compound with the molecular formula SiO2 which can be obtained from the synthesis of crystals, silica minerals, and vegetables. Compounds resulting from the polymerization of silicic acid, which are composed of a tetrahedral SiO4 unit chain with the general formula SiO2. Each silica atom is surrounded by four oxygen atoms. Silica forms a polyhedral network, where the bonds between oxygen tetrahendral are one and the other. Silica will form a framework that has pores that are quite open and allow other molecules to enter and undergo adsorption on the surface of the silica. Modification of silica is done by adding heat at a certain temperature, adding reagents to the active site of silica will change the silica functional group. Silica with the addition of amine compounds reacted with GPTMS can be used as nitrate anion adsorption to see the absorption capacity of silica against nitrate anions using the batch method. The factors used to see this adsorption capacity include pH at pH 7 with an absorption of 1.931463 mg/g and the percentage of absorption is 79.5%. and contact time with a time of 90 minutes with an absorption of 0.32677 mg/g and the percentage of absorption is 67.28785%.
Impregnasi ZnO Karbon Aktif dari Sabut Kelapa (Cocos nucifera L) Fotokatalis Untuk Degradasi Rhodamin B Rahayu Hardiani; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115842

Abstract

Research on increasing the degradation ability of AC-ZnO catalyst against Rhodamine B by impregnation on activated carbon from coconut fiber (Cocos nucifera L) has been carried out. Activated carbon is catalyzed by ZnO semiconductor catalyst by impregnation method. Impregnation was carried out by varying the addition of activated carbon (AC) 5%, 10%, 15%, 20% and 25% ZnO mass for 6 hours. The catalyst was calcined at 300 C for 105 minutes. For the results of the AC-ZnO adsorption test on Rhodamine B, the catalyst was tested on the degradation of Rhodamine B solution (10 ppm) with UV irradiation. obtained 89.76%. This shows that activated carbon from coconut fiber can support to increase the role of ZnO in the degradation of Rhodamine B. Characterization of the optimum degradation yield was carried out by FTIR. The characterization results showed that the ZnO catalyst was successfully formed.
Peningkatan Kemampuan Degradasi ZnO Terhadap Rhodamin B Dengan Impregnasinya Pada Karbon Aktif Dari Ampas Tebu Winda Anisa; Miftahul Khair
Jurnal Periodic Jurusan Kimia UNP Vol 11, No 3 (2022): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/p.v11i3.115994

Abstract

Research has been carried out with the aim of knowing the characteristics of activated carbon made from bagasse waste to be used as a support for zinc oxide (ZnO) catalysts using the impregnation method and the ability of the catalyst to degrade Rhodamin B dyes. Activated carbon is impregnated with Zn(NO3)2.6H2O with variations activated carbon 5%, 10%, 15%, 20%, and 25% to 15 gram mass of Zn(NO3)2.6H2O. The impregnated KA/ZnO was then contacted with 10 ppm Rhodamine B dye with a degradation time of 120 minutes. The mass of KA/ZnO used was 25 mg, 50 mg and 75 mg. The FTIR (Fourier Transform Infra Red) results of the KA/ZnO catalyst show that Zn-O molecules have entered into the pores of the activated carbon marked by the appearance of absorption peaks at wavelengths of 426.28 cm-1, 419.52 cm-1, and 437.85 cm-1 . The results of UV-Vis spectrophotometer measurements obtained the highest degradation percentage of Rhodamin B dye, namely 88.23% at 10% KA/ZnO with a catalyst mass of 75 mg.
Penentuan Energi Celah Pita (Band Gap) Nanopartikel ZnO/Au Hasil Ablasi Laser dalam Cairan Mardiana Julita; Muhandis Shiddiq; Miftahul Khair
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118243

Abstract

The synthesis of ZnO and ZnO/Au nanoparticles using the laser ablation method in liquid has been successfully carried out. Characterization of the optical properties of ZnO and ZnO/Au using a UV-Vis Spectrophotometer (Ocean Optic MAYA Pro 2000) which was measured in the wavelength range of 275 - 875 nm. The characterization results obtained are absorbance values and band gap values of ZnO and ZnO/Au nanoparticles. From this study, the absorbance values of ZnO nanoparticles were found at wavelengths of 330 and 335 nm. After obtaining the absorbance value, the band gap value was analyzed for ZnO and ZnO/Au nanoparticles, respectively, namely 3.23 eV and 3.17 eV. The decrease in the band gap value in ZnO is due to the presence of Au in ZnO nanoparticles which can replace one of the lattices in the ZnO crystal structure.
Penentuan Kondisi Optimum Desorpsi Anion Nitrat (NO3-) pada Silika Mesopori Termodifikasi Dimetilamina (DMA) Dipnorita Retno; Budhi Oktavia; Indang Dewata; Miftahul Khair
Periodic Vol 12, No 2 (2023): PERIODIC
Publisher : Departemen Kimia FMIPA UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/periodic.v12i2.118091

Abstract

Mesoporous silica is an inorganic materials that has high potential to be applied in various industrial fields, one of its application is the adsorption method. To maximize the adsorption of mesoporous silica, modification of the silica surface was carried out with the addition of amine compounds. The amine compound used as a modifier is dimethylamine (DMA). Mesoporous silica which has been modified with dimethylamine is used in the nitrate anions adsorption process by the column method. The adsorption capacity of the nitrate anion is 0.0917 mg/g. After being adsorbed, the desorption process was carried out to release the adsorbed nitrate anions again. From the desorption process, it was found that HCl proved to be the best desorption agent used on nitrate anions. The optimum concentration of HCl was 0.15 M with the number of  nitrate anions desorbed as much as 0.0459 mg with a 100% desorption percentage.
Co-Authors Ananda Putra Anisa Nahari Aruna Pradipta Budhi Oktavia Dipnorita Retno Hendra Zalmi Ilma Zelvina Indah Pratiwi Indang Dewata Iqbal Aulia Fajri Lara Triyuni Malik Aziz Mardiana Julita Muhandis Shiddiq Nabila Fikriandini Rahayu Hardiani Ulfa Azarria Winda Anisa