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All Journal Indonesia Chimica Acta Dalton : Jurnal Pendidikan Kimia dan Ilmu Kimia AMALIAH: JURNAL PENGABDIAN KEPADA MASYARAKAT Abdimas Universal Hydrogen: Jurnal Kependidikan Kimia Jurnal Pengabdian Masyarakat Nusantara Pelita: Jurnal Pengabdian kepada Masyarakat
Thohir, Muhammad Bakhru
Universitas Bojonegoro
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Social Sciences Other

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Characterization of Activated Charcoal Produced Using Green Chemistry Principle Approach Number 7 Thohir, Muhammad Bakhru; Wijaya, Terry Esi Putri
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.11834

Abstract

Charcoal is an important component in the effort to provide clean water. One of the water qualities that need to be considered is the level of hardness. Reducing the level of hardness can be done with activated charcoal. The production of activated charcoal uses many synthetic materials. Therefore, aim of research is to produce, test the performance, and characterization of activated charcoal made with natural acids. The stages of this research are charcoal preparation and natural acid activator, carbonization, activation with natural acids (Averrhoa bilimbi L. and Citrus aurantifolia S.), and characterization. The production results were tested for adsorbing ability and characterization using FTIR, SEM, and XRD to determine the functional groups, structure, and components. The results showed that activated charcoal produced using natural acids had better performance in adsorbing. Characterization with FTIR showed the absorption of C-H functional groups shown at 785 cm-1, 1100 cm-1 for C-O functional groups, 3368 cm-1 for O-H stretching vibration groups. Typical active charcoal groups were also detected at wave numbers 1704 cm-1for C=O functional groups and 1575 cm-1 for C=C groups. Characterization with XRD showed the same pattern between charcoal produced with natural acids and the control. SEM images showed clear pores on the surface of the activated charcoal. Thus, natural acids can really be a candidate for activator replacement in the production of activated charcoal that applies the principles of green chemistry.
Synthesis of Colorimetric Sensor for Cyanide Detection with Iron(III) Chloride reagent Using Sol Gel Method with Smarthphone Combination Rohsaita, Amalia; Thohir, Muhammad Bakhru; Surya Efendi, Meilisa Rusdiana; Kusumaning Tiyas, Windi Pangesti; Nursaida, Marta Citra
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 3 (2024): June-July 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i3.11887

Abstract

Sensor untuk mendeteksi ion sianida (CN - ) telah berhasil dilakukan dengan metode sol-gel menggunakan prekursor tetraetil ortosilikat dan pereaksi FeCl3. Penelitian ini bertujuan untuk mengetahui kondisi optimal sintesis, kondisi optimal sensor, menentukan LoD dan LoQ. Sintesis dilakukan dengan mencampurkan prekursor dengan pelarut etanol. Selanjutnya ditambahkan H2O, Triton X-100, reagen dan katalis ke dalam campuran. Variasi yang dilakukan adalah konsentrasi reagen dan waktu penuaan terbaik. Hasil sensor dinyatakan dalam nilai Euclidean Distance (ED) titik Merah-Hijau-Biru (RGB) yang diperoleh. Kondisi optimal untuk penyensoran dilakukan dengan memvariasikan waktu kontak. Pada sintesis sol gel konsentrasi reagen terbaik diperoleh pada konsentrasi 0,1 M dan waktu penuaan terbaik adalah 4 hari. Penentuan kondisi sensor optimal terjadi pada waktu 30 detik dengan batas pencucian 120 detik. Validasi metode sensor menghasilkan linearitas pada rentang konsentrasi 100 – 1000 ppm dengan nilai R 2 sebesar 0,9984. LoD dan LoQ masing-masing sebesar 65,45 ppm dan 218,16 ppm. Karakterisasi sensor menggunakan spektrofotometer FTIR dari bilangan gelombang 4000 sampai 400 cm-1. Spektrum IR yang dihasilkan menunjukkan keberhasilan dalam sintesis sol-gel, karena pada penelitian ini SiO2 muncul pada bilangan gelombang sekitar 433 cm-1. Setelah tahap sensor dengan merendam sensor pada analisa CN - 0,01 M dan CN - 0,1 M tidak ada tanda-tanda munculnya gugus Fe-S pada bilangan gelombang 4000-400 cm-1, karena daerah serapannya berada pada 380- 311 cm -1.
Colorimetric Sensor of Hg(II) Ion from AgNPs-MO Quantified Using DIC with ED Equation Approach Thohir, Muhammad Bakhru; Tiyas, Windi Pangesti Kusumaning
Hydrogen: Jurnal Kependidikan Kimia Vol. 12 No. 6 (2024): December 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i6.13772

Abstract

Mercury is one of the heavy metals that has high toxicity, not only for the environment but also for human health. Mercury is found in many cosmetic products; unfortunately, for people who do not understand the dangers of mercury cosmetic ingredients, their skin will become red rashes. The novelty of this article is to use colorimetric sensor for mercury combined with Digital Image Colorimetry (DIC). The image is captured with the the smartphone camera and quantified using the Euclidean Distance (ED) Equation approach. In addition, the synthesized AgNPs also use the green synthesis method with natural materials as reducing agents and stabilizers. Therefore, the purpose of this study is to determine the best synthesis conditions and determine the detection performance of mercury (II) ions. The research began with the synthesis of mercury detection substances, namely silver nanoparticles reduced and stabilized by Moringa oleifera leaf extract (AgNPs-MO). In this study, it was found that silver nanoparticles began to form at 1 hour accompanied by heating at 120°C using a hotplate, while 6 hours when without heating. The optimum pH condition is 10. This mercury detection method has good sensitivity and accuracy values, with RSD values of less than 1% for each analyte in 5 repetitions.
Synthesis AuNPs Using Moringa oleifera Extract and Potential Study as Colorimetric Microplastic Detection Thohir, Muhammad Bakhru; Setyaningrum, Dyah; Efendi, Meilisa Rusdiana Surya; Saputra, Arya Ananda; Nursaida, Marta Citra
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 3 (2025): June 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i3.16603

Abstract

Nanoparticles are multipurpose materials that have been utilized in the medical, energy, and environmental monitoring fields. The advantage of nanoparticles is that they have unique physicochemical properties such as surface area, optical activity, and surface modifiability. One of the important uses of nanoparticles is for environmental monitoring. This is because the surface of nanoparticles can be modified, and with their small size, they can reach analytes in difficult matrices. However, conventional synthesis methods of nanoparticles have been unsustainable. Therefore, the synthesis of AuNPs using bioreductors was considered urgent. The aim of this research was to determine the optimum conditions for the synthesis of AuNPs with Moringa oleifera (MO) as a bioreductor to obtain AuNPs-MO, to characterize the synthesized AuNPs-MO, and to study the application of AuNPs-MO for monitoring microplastic pollutants. This research was conducted through the stages of extraction, determination of optimum conditions, characterization, and literature study of the potential of AuNPs-MO as a detector. Determination of optimum conditions was carried out by applying variations in pH and precursor-reducing agent ratio. The optimal pH was found to be 6, and the optimal volume ratio was 15:5 (mL). Characterization of AuNPs-MO was conducted using FTIR and PSA. The FTIR spectra showed identical absorption patterns for AuNPs synthesized with bioreductants, and the particle size was found to be 61.15 nm. In addition, microplastics were detected using AuNPs both directly, through surface modification with proteins, and indirectly, with the assistance of acetone. From this series of experiments, satisfactory results were obtained.
Edukasi Pemanfaatan Buah dan Pohon Pisang untuk Keberlajutan Nilai Ekonomi Pelaku UMKM Susilo, Joko Hadi; Endang, Endang; Rahmawati, Laily Agustina; Suprastiyo, Ahmad; Erwanto, Erwanto; Astuti, Hartiningsih; Thohir, Muhammad Bakhru
Pelita: Jurnal Pengabdian kepada Masyarakat Vol. 3 No. 1 (2023): Pelita: Jurnal Pengabdian kepada Masyarakat
Publisher : Perkumpulan Kualitama Edukatika Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (416.603 KB) | DOI: 10.51651/pjpm.v3i1.326

Abstract

Micro, small and medium enterprises have an important role in maintaining general economic balance in an area through increasing income in the category of community economic independence. Micro-enterprises are more directed at production carried out by households. However, there are still many problems in its operations, especially in human resources and the management of products and waste from products in a sustainable manner. In this activity, researchers use a participatory approach which is often called participatory action research (PAR). The result of this assistance is that improving the quality of knowledge of business actors can be carried out properly through providing education regarding administrative requirements that must be met by business actors in managing their business, including NPWP, NIB, PIRT, Trademarks and Halal Certification. improvement of product quality that has been carried out for business actors in this assistance through the implementation of a marketing mix strategy as expected. Utilization of tree waste and banana peels through education in this activity can run well. Utilization of banana peel waste is carried out for animal feed and this assistance can be carried out properly starting from the drying process to milling.
New Synthesis Method of AuNPs Using Moringa oleifera Extract as Bioreductor and Potential Study as Colorimetric Microplastic Detection Thohir, Muhammad Bakhru; Setyaningrum, Dyah; Saputra, Arya Ananda; Nursaida, Marta Citra
Jurnal Akta Kimia Indonesia (Indonesia Chimica Acta) Volume 18, No 2: December 2025
Publisher : Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/ica.v18i2.44733

Abstract

Nanoparticles are multipurpose materials that have been utilized in the medical, energy, and environmental monitoring fields. The advantage of nanoparticles is that they have unique physicochemical properties such as surface area, optical activity, and surface modifiability. One of the important uses of nanoparticles is for environmental monitoring. This is because the surface of nanoparticles could be modified, and with their small size, they could reach analytes in difficult matrices. However, the synthesis of nanoparticles has been an unsustainable process. Therefore, the synthesis of AuNPs using bioreductors finds its urgency. The aim of this research is to determine the optimum conditions for the synthesis of AuNPs-MO, the character of the synthesized AuNPs-MO, and to study the application of AuNPs-MO for monitoring microplastic pollutants. This research was conducted through the stages of extraction, determination of optimum conditions, characterization, and literature study of the potential of AuNPs-MO as a detector. Determination of optimum conditions was carried out by applying variations in pH and precursor-reducing agent ratio. Characterization of AuNPs-MO was done with FTIR and PSA. In addition, microplastic detection models with AuNPs-MO have been obtained directly and indirectly. From this series of experiments, satisfactory results have been obtained.
Co-Authors Andreanto, Dicky Ardana Putri Farahdiansari Aulia Dinar Rosyadin Dyah Setyaningrum, Dyah Effendi, Meilisa Rusdiana Surya Endang Endang, Endang Endang, Endang Erwanto Hartiningsih Astuti Hidayati, Nur Rahma Anggun Kusumaning Tiyas, Windi Pangesti Mochammad Imron Awalludin Mrabawani Insan Rendra Ni’matus Sabila Nursaida, Marta Citra Pambudi, Muhammad Halim Permatasari, Fida Yulia Rahmawati, Laily Agustina Rohsaita, Amalia Roziqin, Muhammad Khoirur Saputra, Arya Ananda Susilo, Joko Hadi Tiyas, Windi Pangesti Kusumaning Wijaya, Terry Esi Putri