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All Journal HAYATI Journal of Biosciences Jurnal Pengolahan Hasil Perikanan Indonesia Jurnal Ilmu Tanah dan Lingkungan VALENSI Jurnal Bios Logos CHEMISTRY PROGRESS JURNAL KIMIA SAINS DAN APLIKASI JURNAL TEKNOLOGI LINGKUNGAN IPTEK Journal of Proceedings Series Jurnal Riset Kimia SEMIRATA 2015 Jurnal Kimia Mulawarman IJFAC (Indonesian Journal of Fundamental and Applied Chemistry) Science and Technology Indonesia Jurnal Penelitian Sains Chimica et Natura Acta Indonesian Journal of Pure and Applied Chemistry Sains Natural: Journal of Biology and Chemistry JURNAL PERTANIAN PRESISI (JOURNAL OF PRECISION AGRICULTURE) Jurnal Tanah dan Iklim
Charlena
Departemen Kimia,Fakultas Matematika Dan Ilmu Pengetahuan Alam, Institut Pertanian Bogor Kampus IPB Dramaga Jl.Agatis Wing 2 Level 4, Bogor 16144, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics

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Journal : valensi

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Zeolit Sintetis Terfungsionalisasi 3-(Trimetoksisilil)-1-Propantiol sebagai Adsorben Kation Cu(II) dan Biru Metilena Sri Sugiarti; Charlena Charlena; Nurul Afiati Aflakhah
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 3, No. 1, Mei 2017
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v3i1.5144

Abstract

The more commonly used method for making synthetic zeolite from kaolin is hydrothermal method. This research tested a sol-gel method in processing synthetic zeolit  using kaolin as the basic ingrediant. The synthetic  zeolite  derived from the sol-gel method was then characterized using X-ray Difractometer and Scanning Electron Microscope, which found resulting products zeolite-A, zeolite Y and sodalite. The adsorption ability of the synthetic zeolites was tested using Cu(II) and methylene blue.  Functionalization of the synthetic zeolites by 3-(trimetoksisilil)-1-propantiol was  done to increase adsorption capacity. Zeolite A modified by 3-(trimetoksisilil)-1-propantiol  had the greater capacity to adsorb methylene blue at 30.11 mg/g. The adsorption isotherms of all the synthetic zeolites approached the Langmuir form. The adsorption energy off all synthetic zeolites approached the chemical adsorption.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5144
Synthesis and Characterization of Hydroxyapatite from Green Mussel Shell with Sol-Gel Method Charlena Charlena; Akhiruddin Maddu; Tatang Hidayat
Jurnal Kimia Valensi Jurnal Kimia VALENSI Volume 8, No. 2, November 2022
Publisher : Syarif Hidayatullah State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v8i2.27494

Abstract

Hydroxyapatite (HAp) is a major component of bones and teeth. HAp is widely used to repair, fill, extend, and reconstruct damaged bone tissue. HAp is used for bone and dental implants, so it is necessary to synthesize HAp. HAp synthesis can utilize green mussel shell waste as a calcium precursor. This research synthesized HAp from a green mussel shell using the sol-gel method. The controlled synthesis parameter was pH, and the variable being compared was the heating temperature at 900 and 1100 °C. The HAp products were characterized by an X-ray diffractometer (XRD), Fourier-transform infrared spectrophotometer, and scanning electron microscope. The results showed that HAp was formed at alkaline pH, namely at pH 11. The XRD pattern showed that Hap was formed along with type A apatite carbonate, octacalcium phosphate, α- and β-tricalcium phosphate. The crystallinity was increased by raising the temperature and prolonging the heating time. The quality of HAp will improve with increasing crystallinity, and increasing the temperature will also raise the amount of HAp formed.
Development and Characterization of Gelatin-Based Bio-Nanocomposite Films Reinforced with Carbon Dots for Enhanced Mechanical and Optical Properties Prima Soheti; Charlena Charlena; Noviyan Darmawan; Mala Nurilmala
Jurnal Kimia Valensi Jurnal Kimia VALENSI, Volume 12, No. 1, May 2026
Publisher : Department of Chemistry, Faculty of Science and Technology Syarif Hidayatullah Jakarta State Islamic University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/jkv.v12i1.48995

Abstract

Gelatin-based bio-nanocomposite films reinforced with carbon dots were developed and characterized to evaluate their mechanical, thermal, and optical properties. The films were prepared with carbon dot concentrations of 0.0, 0.1, 0.5, and 1.0% (w/w) to examine the effect of nanofiller incorporation. Optical analysis showed enhanced ultraviolet–visible absorption at 339–344 nm and red-shifted fluorescence emission at 500–517 nm under 400 nm excitation, indicating improved light-responsive behavior. The addition of carbon dots significantly improved tensile strength, elongation at break, and Young’s modulus, demonstrating enhanced flexibility and mechanical performance. Furthermore, carbon dots reduced the water vapor transmission rate and transparency while increasing film density, indicating improved barrier properties. The film containing 0.5% carbon dots showed the most balanced performance, with a tensile strength of 27.43 ± 0.71 MPa, elongation at break of 23.17 ± 1.66%, and Young’s modulus of 0.26 ± 0.03 GPa. Structural analysis confirmed no significant changes in chemical composition and showed uniform dispersion of carbon dots. Thermal analysis indicated improved stability with a melting temperature of 167°C. These findings highlight the potential of gelatin-based bio-nanocomposite films for sustainable packaging applications.
Co-Authors Aditya, Muhammad Hafizh Agung Dhamar Syakti Ahmad Syahreza Akhiruddin Akhiruddin Maddu Aldes Lebani Ananda Novita Hi Pattu Armi Wulanawati Aslihati Aslihati Chonny Damayanti Daniel Putra Oktavianus Laia Dede Heri Yuli Yanto Dicky Iswara, Muhammad Dila Ardiansyah Dyah Iswantini Fendy Fendy Fitria Ainun Rohma Hanies Ambarsari Henny Purwaningsih Ida Ayu Putu Sri Widnyani Imelda Zahra Irma Herawati Suparto Irma Herawati Suparto Irma Herawati Suparto Iswandi Anas Iswandi Anas Iswara, Muhammad Dicky J. SRI ADININGSIH Joni Prasetyo, Joni Khefanny, Yemima Chellyne Khofiyatuzziyadah, Alif Aryan Komar Sutriah L.I NURHAYATI LADY R. WIDOWATI Mala Nurilmala Manasye Erlangga Marita Soebrata, Betty Mas?ud, Zainal Alim Maulida Oktaviani Moch. Irgham Zuhfria Moh. Yani Nazriati Nazriati dkk. Niken Dyah Wanodyanti Noviyan Darmawan Nurmawan, Cucu Putri Nurul Afiati Aflakhah Nurwita Mukti Sari Prima Soheti Purwaningsih, Henny Purwantiningsih Ravena Ravena Rina Fitriana Fadila Rosdiana, Tina S. SRI DWININGSIH Setyanto Tri Wahyudi Sianipar, Rut Novalia Rahmawati Sri Sugiarti Sulistioso Giat Sukaryo Susi Sulistia, Susi Tatang Hidayat Tetty Kemala Tina Rosdiana Wisaeni Intannia Wulan Islamia Yadi Setiadi Yadi Setiadi Yemima Chellyne Khefanny Yessie Widya Sari Zainal Alim Mas'ud Zainal Alim Mas’ud