Article Per Year (5 Year)
p-Index From 2020 - 2025
4.309
P-Index
This Author published in this journals
All Journal Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Zarah Orbital: Jurnal Pendidikan Kimia JKPK (Jurnal Kimia dan Pendidikan Kimia) SAP (Susunan Artikel Pendidikan) Bivalen: Chemical Studies Journal UNESA Journal of Chemical Education Prosiding Seminar Nasional PPG Universitas Mulawarman Bulletin of Chemical Reaction Engineering & Catalysis
Mukhamad Nurhadi, Mukhamad
Program Magister Pendidikan Kimia, Fakultas Keguruan Dan Ilmu Pendidikan, Universitas Mulawarman
Religion Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Education Other

Published : 43 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 43 Documents
Search

 1   2   3   4   5 
Development of Interactive Chemistry Learning Devices using Domino Chemical Media in terms of Student Activity and Learning Outcomes of Class X High School in Samarinda Medita Hermawanti; Mukhamad Nurhadi; Abdul Majid
JKPK (Jurnal Kimia dan Pendidikan Kimia) Vol 3, No 2 (2018): JKPK (Jurnal Kimia dan Pendidikan Kimia)
Publisher : Program Studi Pendidikan Kimia FKIP Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (804.459 KB) | DOI: 10.20961/jkpk.v3i2.20908

Abstract

This research focuses on research and development of learning devices using Chemical Domino media. The product of this research is Interactive Chemical Domino learning media, which focused on compound nomenclature material for class X which is expected feasible to be used as learning media. The subjects in this study are divided into 2 stages, the first is the small group test in which only 12 students from SMA Negeri 1 Samarinda participate. The second is field test (large group) which 96 students from 3 high schools participate, namely SMA Negeri 1 Samarinda, 36 students from Madrasah Aliyah Negeri 2 Samarinda, and 36 students from SMA Negeri 5 Samarinda. The results showed that the validation of media experts scored 85.77%, material expert validation scored 88.63%. In learning media validation, it showed that validation of RPP scored 92.08%, LKS validation scored 92.67%. For student response results scored 81.25%. From those scores it can be concluded that development of learning device using Media Chemical Domino is "very good”. Meanwhile for the observation results of student activity increased up to 33.71% and for student learning results from posttest and daily test reach KKM with percentage of student learning result 77,34%. 
Guided Discovery Learning Berbasis Indigenous Knowledge untuk Melatih Keterampilan Berpikir Kritis Siswa Anjelica Octavia Arung; Farah Erika; Mukhamad Nurhadi
SAP (Susunan Artikel Pendidikan) Vol 6, No 3 (2022)
Publisher : Universitas Indraprasta PGRI Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (526.503 KB) | DOI: 10.30998/sap.v6i3.12038

Abstract

Critical thinking skills are high-level thinking skills that must be developed in schools. These skills need to be trained through the use of learning models that bring students closer to real experiences in the surrounding environment, so that students become more active and able to think critically, one of which is applying the indigenous knowledge-based GDL model. This study aims to train students' critical thinking skills through the application of the indigenous knowledge-based GDL model. The subjects of this study were 108 students consisting of class XI IPA 4, XI IPA 5, and XI IPA 6 SMA Negeri 5 Samarinda for the academic year 2020/2021 which were selected using a purposive sampling technique. This research is classified as quantitative research with a pre-experimental research design type one-group pretest-posttest design. The critical thinking skills test instrument was 5 essay questions composed of 5 indicators. The results of the analysis of critical thinking skills show that the average critical thinking skills of class XI science students at SMAN 5 Samarinda were in the medium category with an n-gain of 0.53; the mean effect size of 5.17 belongs to the large category; statistical test results (? = 5%) which showed a significant increase in critical thinking skills after the application of the indigenous knowledge-based GDL model. Based on this, it can be said that the indigenous knowledge-based GDL model is effectively used to train students' critical thinking skills.
PENGARUH ISU SOSIOSAINTIFIK DALAM MODEL DISCOVERY LEARNING TERHADAP KETERAMPILAN BERPIKIR KRITIS SISWA PADA MATERI ASAM BASA Pintaka Kusumaningtyas; Rezky Oktafiani; Mukhamad Nurhadi; Sekar Sulistyaningwarni
Orbital: Jurnal Pendidikan Kimia Vol 4 No 1 (2020): Orbital: Jurnal Pendidikan Kimia
Publisher : Chemistry Education Department of Education and Teaching Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/ojpk.v4i1.5172

Abstract

The aim of this study was to determine the influence of sosioscientific issues in discovery learning model toward critical thinking skills of students on the subject matter of acid-base. The research method used was quasi experimental, with the type of research design was posttest only control group design. The population in this study was all students of class XI MIPA SMAN 13 Samarinda in the 2018/2019 school year, amounting to 66 students, which were divided into 2 classes. The samples were taken using saturated sampling technique. The technique used to measure critical thinking skills of students was post-test technique in form of essay test. Data were analyzed by normality test, homogeneity test, and independent sample t-test. The results showed the average posttest score in the control class was 72.06 (good category) and the experimental class was 79.36 (good category). Statistical analysis using t-test showed tcount, 3.15 > ttable, 1.66, which means that there was an influence of the use of sosioscientific issues in the discovery learning model toward critical thinking skills of students on the subject matter of acid-base.
PENGARUH MEDIA GOOGLE FORM DALAM MODEL PEMBELAJARAN BERBASIS MASALAH TERHADAP HASIL BELAJAR SISWA MATERI ASAM BASA Rizky Handayani; Usman Sain; Mukhamad Nurhadi
Orbital: Jurnal Pendidikan Kimia Vol 5 No 1 (2021): Orbital: Jurnal Pendidikan Kimia
Publisher : Chemistry Education Department of Education and Teaching Faculty

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/ojpk.v5i1.6227

Abstract

The aim of research was found the effect of google form media on problem-based learning models with student learning outcomes of XI at one of the schools in Samarinda in acid-base chapter. Design of research was used is true-experimental design is especially posttest only control design. The population was all students of class XI MIPA which amounted to 105 students. The research subject was taken by cluster random sampling. Data collection techniques in this research are test, documentation, and observation techniques. The test technique was obtained of three time post-test at the end of each meeting were obtained from 20% of each post-test score and 40% of final examination score. The documentation data as previous student learning outcomes was used to determine homogeneous of the sample. The observation data was obtained of direct observation of the implementation of the steps of teacher and student learning. Technical analysis of the data using normality test, F-test, and T-test. The average of experimental class learning outcomes and the control class learning outcomes were 79.86 and 73.21, respectively. The T-test result shown T-count (2.75)> T-table (1.67) with significant 0.05. So it can be concluded that the google form media give effect in problem-based learning models onto student learning outcomes in acid-base chapter.
Comparative Adsorption Performance of Carbon-containing Hydroxyapatite Derived Tenggiri (Scomberomorini) and Belida (Chitala) Fish Bone for Methylene Blue Sri Lestari; Mukhamad Nurhadi; Ratna Kusuma Wardani; Eko Saputro; Retno Pujisupiati; Nova Sukmawati Muskita; Nezalsa Fortuna; A’an Suri Purwandari; Fahria Aryani; Sin Yuan Lai; Hadi Nur
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 3 Year 2022 (September 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.3.15303.565-576

Abstract

The utilization of fishbone as the carbon source for methylene blue adsorption has been successfully studied. Fishbone was prepared from two kinds of fish such as marine fisheries (ex. Tenggiri) and freshwater fisheries (ex. Belida). The carbons were prepared by carbonation of fishbone powder at  500 °C for 2 h. Physical properties of carbons were characterized using Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), wavelength dispersive X-ray fluorescence (WDXRF), Scanning Electron Microscope (SEM), and hydrophobicity. The carbons were utilized as the adsorbent for removing methylene blue by varying the contact time, initial dye concentration, and temperature. It is concluded that both carbons can very good adsorb the methylene blue. The adsorption performance of carbon (TFC) from Tenggiri fish is better than carbon (BFC) from Belida fish. The adsorption was well fitted with the Langmuir adsorption model (R2 ~ 0.998) and the pseudo-second-order model. This indicated that the dye molecules were adsorbed on the surface-active site of carbon via chemical binding, forming an adsorbate monolayer. Thermodynamic parameters, including the Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS), indicated that the adsorption of methylene blue onto the carbon from fishbone was spontaneous. Thus, carbon from fishbone can be applied as a low-cost adsorbent to treat industrial effluents contaminated with methylene blue. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Thermodynamic Study of One-step Production from Isobutene to Methyl Methacrylate Lik Quan Lau; Sin Yuan Lai; Haiyan Li; Cheng Loong Ngan; Mahashanon Arumugam; Mukhamad Nurhadi
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 3 Year 2022 (September 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.3.15574.590-607

Abstract

Methyl methacrylate (MMA) has emerged as an essential industrial monomer. However, the toxic by-production and shortage supply of MMA in the global market has gained great attention. Herein, a one-step synthesis to produce MMA from isobutene via a direct oxidative esterification process has been demonstrated to curb the aforementioned downsides. Thermodynamic analysis via Gibbs free energy minimization method proved the feasibility of this route via the equilibrium constant. Despite tert-butanol and isobutane showed higher equilibrium constant than isobutene, they should be avoided. Isobutane is highly flammable while the precursor of tert-butanol is exorbitant. Thus, isobutene was selected for the equilibrium compositions screening. Isobutene conversion was 90% and 15% MMA yield at 700 °C and IBN: O2: MeOH ratio with 1:7:1. This route is mainly limited by the generation of side reactions from the reaction of CH3OH and O2. By varying the feedstock ratio at 1:2:1, the MMA yield increased to ~25%. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Organic Wastewater Treatment using Two-dimensional Graphene-based Photocatalysts: A Review Kelvert Kong; Zhiying Zhu; Mukhamad Nurhadi; Sumari Sumari; Siew Fan Wong; Sin Yuan Lai
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 3 Year 2023 (October 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20029

Abstract

Photocatalysts have gained enormous attention in water decontamination due to their economic viable and intriguing properties. Recently, graphene-based semiconductors have become the sparkling star on the horizon of material science. The coupling of two-dimensional graphene and its derivatives (graphene oxide and reduced graphene oxide) with semiconductors could effectively enhance the efficiency in organic wastewater degradation under light irradiation. Hence, a collective study on this topic is necessary.  Four types of graphene-based semiconductors, viz. titania, zinc oxide, cadmium sulfide, and bismuth oxychloride, are explored. Besides, synthesis approaches and properties of these photocatalysts are elucidated too. We hope this review could enable us to rationally design and harness the morphology, structure and electronic properties of these advanced materials. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Kinetic of Adsorption Process of Sulfonated Carbon-derived from Eichhornia crassipes in the Adsorption of Methylene Blue Dye from Aqueous Solution Mukhamad Nurhadi; Iis Intan Widiyowati; Wirhanuddin Wirhanuddin; Sheela Chandren
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 1 Year 2019 (April 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.1.2548.17-27

Abstract

The evaluation of kinetic adsorption process of sulfonated carbon-derived from Eichhornia crassipes in the adsorption of methylene blue dye from aqueous solution has been carried out. The sulfonated carbon-derived from E. crassipes (EGS-600) was prepared by carbonation of E. crassipes powder at 600 °C for 1 h, followed by sulfonation with concentrated sulfuric acid for 3 h. The physical properties of the adsorbents were characterized by using Fourier transform infrared spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), and nitrogen adsorption-desorption studies. Adsorption study using methylene blue dye was carried out by varying the contact time and initial dye concentration for investigated kinetics adsorption models. The effect of varying temperature was used to determine the thermodynamic parameter value of ΔG, ΔH, and ΔS. The results showed that the equilibrium adsorption capacity was 98% when EGS-600 is used as an adsorbent. The methylene blue dye adsorption onto adsorbent takes place spontaneity and follows a pseudo-second-order adsorption kinetic model. 
Thermodynamic Study of One-step Production from Isobutene to Methyl Methacrylate Lik Quan Lau; Sin Yuan Lai; Haiyan Li; Cheng Loong Ngan; Mahashanon Arumugam; Mukhamad Nurhadi
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 3 Year 2022 (September 2022)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.3.15574.590-607

Abstract

Methyl methacrylate (MMA) has emerged as an essential industrial monomer. However, the toxic by-production and shortage supply of MMA in the global market has gained great attention. Herein, a one-step synthesis to produce MMA from isobutene via a direct oxidative esterification process has been demonstrated to curb the aforementioned downsides. Thermodynamic analysis via Gibbs free energy minimization method proved the feasibility of this route via the equilibrium constant. Despite tert-butanol and isobutane showed higher equilibrium constant than isobutene, they should be avoided. Isobutane is highly flammable while the precursor of tert-butanol is exorbitant. Thus, isobutene was selected for the equilibrium compositions screening. Isobutene conversion was 90% and 15% MMA yield at 700 °C and IBN: O2: MeOH ratio with 1:7:1. This route is mainly limited by the generation of side reactions from the reaction of CH3OH and O2. By varying the feedstock ratio at 1:2:1, the MMA yield increased to ~25%. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). 
Modification of Coal Char-loaded TiO2 by Sulfonation and Alkylsilylation to Enhance Catalytic Activity in Styrene Oxidation with Hydrogen Peroxide as Oxidant Mukhamad Nurhadi
Bulletin of Chemical Reaction Engineering & Catalysis 2017: BCREC Volume 12 Issue 1 Year 2017 (April 2017)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.12.1.501.55-61

Abstract

The modified coal char from low-rank coal by sulfonation, titanium impregnation and followed by alkyl silylation possesses high catalytic activity in styrene oxidation. The surface of coal char was undergone several steps as such: modification using concentrated sulfuric acid in the sulfonation process, impregnation of 500 mmol titanium(IV) isopropoxide and followed by alkyl silylation of n-octadecyltriclorosilane (OTS). The catalysts were characterized by X-ray diffraction (XRD), IR spectroscopy, nitrogen adsorption, and hydrophobicity. The catalytic activity of the catalysts has been examined in the liquid phase styrene oxidation by using aqueous hydrogen peroxide as oxidant. The catalytic study showed the alkyl silylation could enhance the catalytic activity of Ti-SO3H/CC-600(2.0). High catalytic activity and reusability of the o-Ti-SO3H/CC-600(2.0) were related to the modification of local environment of titanium active sites and the enhancement the hydrophobicity of catalyst particle by alkyl silylation. 
Co-Authors Abdul Majid Abdul Majid Alsultan, Abdulkareem Ghassan Anjelica Octavia Arung Anton Prasetyo Arpiana, Devi A’an Suri Purwandari Cheng Loong Ngan Darna Yunita Degirmenci, Volkan Eko Saputro Fahria Aryani Farah Erika Fathur Insani Ridho Goh, Chien Yong Guo, Yubei Hadi Nur Hadi Nur Hadi Nur Hadi Nur Hadi Nur Hadi Nur Hadi Nur Hadi Nur Hadi Nur Haiyan Li Hartati, Yuli Herman, Heri Iis Intan Widiyowati Jefi Jefi Kelvert Kong Lai Sin Yuan Lai, Sin Yuan Lau, Alysa Lik Quan Lau Maasje C. Watulingas Mahashanon Arumugam Maria Ulfah Maulidina Rizki Medita Hermawanti Muhammad Hatami Munik Endang Rizkiana Mursyidah Mursyidah Nabila Nur Agusti Nazarudin Nazihah, Diyani Septihadi Nezalsa Fortuna Nova Sukmawati Muskita Nur Anisa, Nela Octavia A., Anjelica Pintaka Kusumaningtyas Pristiningtyas Ambarwati Rahmadani, Agung Rahmat Gunawan RAHMAT GUNAWAN Ratna Kusuma Wardani Ratna Kusumawardani, Ratna Retno Pujisupiati Rezky Oktafiani Rinda Angghita Putri Rizky Handayani Robbiatul Adawiyah Rony, Zahara Tussoleha Sekar Sulistyaningwarni Sheela Chandren Sheela Chandren Siew Fan Wong Sin Yuan Lai Sin Yuan Lai Sin Yuan Lai Sin Yuan Lai Sin Yuan Lai Sin Yuan Lai Sin Yuan Lai Sin Yuan Lai Siti Mutmainah Siti Rahma Soerja Koesnarpadi Sri Lestari Suciyanti Jufri Sulastria Marsuki Sumari Sumari Syaiful Bahri Teguh Wirawan Teguh Wirawan, Teguh Usman Sain Watulingas, Maasje C. Wirhanuddin Wirhanuddin Wirhanuddin, Wirhanuddin Yun Hin, Taufiq-Yap Yuniar Ponco Prananto Yuniati Mangesa Zhiying Zhu Zhiying Zhu