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All Journal Jurnal Periodic Jurusan Kimia UNP MASALIQ: Jurnal Pendidikan dan Sains Gudang Jurnal Multidisiplin Ilmu
Hary Sanjaya
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Degradasi Zat Warna Metil Merah Dengan Katalis ZnO Menggunakan Metode Fotosonolisis Putri Ayu; Ananda Putra; Hary Sanjaya; Indang Dewata; Yohandri Yohandri
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 (470.015 KB) | DOI: 10.24036/p.v10i2.112453

Abstract

The research that has been carried out on the photosonolytic degradation of methyl red uses a ZnO as a catalyst which aims to determine the effect of time and catalyst mass on the degradation of methyl red. The time of degradation is about 30 to 150 minutes while about 0,05 grams to 2,5 grams of catalyst mass is used. The measurement results of the Uv-Vis spectrophotometer were obtained at a wavelength of 435nm with an absorbance 0,2471. In the variation of the degradation time, the highest result was obtained at 60 minutes which was 75,27%, while the ZnO mass variation carried out at the optimum time of 60 minutes obtained the highest results in the addition of 0,15 grams ZnO with the percentage of degradation (%D) of 47,79%. This study shown that hydroxyl radicals (∙OH) takes as a main control in degrading of methyl red.
Pengaruh Penambahan Diethanolamine (DEA) Pada SnO2 Dalam Degradasi Methyl Orange Patriela, Miftah; Hary Sanjaya; Septian Budiman
Gudang Jurnal Multidisiplin Ilmu Vol. 2 No. 2 (2024): GJMI - FEBRUARI
Publisher : PT. Gudang Pustaka Cendekia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59435/gjmi.v2i2.277

Abstract

Pengelolaan air limbah domestik di Indonesia masih menghadapi tantangan teknis dan non-teknis. Nanopartikel SnO2 dapat digunakan sebagai fotokatalis untuk medegradasi polutan organik menjadi produk yang ramah lingkungan berupa CO2 dan H2O. Metode yang digunakan untuk uji aktivitas fotokatalis menggunakan metode fotolisis. Hasil degradasi methyl orange didapatkan sebesar 87.89% dengan SnO2 dengan penambahan 1.5 mL Diethanolamine (DEA) sedangkan nilai optimum degradasi methyl orange dengan SnO2 tanpa penambahan aditif didapatkan lebih kecil sebesar 3.63%. Hal ini menunjukkan efektivitas fotokatalis pada nanopartikel SnO2 dengan penambahan DEA.
Pengaruh Konsentrasi Doping TiO₂ dan Volume Diethanolamine (DEA) terhadap Nilai Bandgap CuO dengan Metode Sol-Gel Sakina Cahaya Fatma; Hary Sanjaya; Miftah Patriela
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6634

Abstract

Copper(II) oxide (CuO) is a promising semiconductor material for various applications such as photocatalysis, sensing, and renewable energy devices. However, its performance is often limited by a suboptimal bandgap value for efficient energy conversion. This study aims to evaluate the effects of titanium doping concentration and the addition volume of diethanolamine (DEA) on the optical properties of CuO synthesized via the sol-gel method. The sol-gel technique was chosen for its ability to produce uniform doping distribution and stable nanoparticle structures. Bandgap characterization was conducted using UV-DRS spectroscopy. The results show that the bandgap of pure CuO, initially measured at 1.36 eV, was reduced to 1.28 eV through titanium doping at an optimal concentration of 0.3 mmol. The further addition of DEA at an optimal volume of 1 mL lowered the bandgap to 1.22 eV. This reduction indicates that titanium doping and DEA addition significantly influence the optical properties of CuO. These effects are likely due to structural irregularities such as oxygen vacancies, crystal defects, and impurities, which contribute to modifications in the material’s electronic structure. Additionally, the uniform distribution of microstrain and smaller particle size further contribute to structural alterations and bandgap tuning.
Pengaruh Cetyltrimethylammonium Bromide pada Nilai Bandgap Semikonduktor TiO₂-ZnO Olga Tiara Rizki; Hary Sanjaya
MASALIQ Vol 5 No 4 (2025): JULI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i4.6737

Abstract

This study aims to investigate the effect of adding the surfactant Cetyltrimethylammonium Bromide (CTAB) on the bandgap energy of the TiO₂-ZnO semiconductor material. The material was synthesized using the sol-gel method and characterized by UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). Variations in CTAB concentration (0.015–0.035 grams) were introduced to evaluate changes in the material’s optical properties. The results show that CTAB addition up to 0.025 grams reduced the bandgap energy from 3.225 eV to 3.004 eV. This decrease is attributed to the formation of structural defects such as oxygen vacancies and reduced particle size, which introduce additional energy states within the bandgap. However, further addition of CTAB beyond 0.025 grams led to an increase in bandgap energy, likely due to particle agglomeration and structural disruptions. These findings indicate that CTAB not only acts as a surfactant but also plays a role in tuning the structure and optical properties of TiO₂-ZnO. Therefore, optimizing CTAB concentration is crucial for enhancing the material's performance in photocatalytic and solar cell applications.
Pengaruh Penambahan Aditif Diethanolamine (DEA) terhadap Energi Celah Pita TiO₂ Terdoping ZnO menggunakan Metode Sol-Gel Sri Rara Julianti; Hary Sanjaya
MASALIQ Vol 5 No 5 (2025): SEPTEMBER
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v5i5.6878

Abstract

This study aims to evaluate the effect of Diethanolamine (DEA) addition on the band gap energy and crystal structure of TiO₂ semiconductors doped with ZnO using the sol-gel method. DEA functions as a stabilizing agent and particle growth controller to achieve more uniform particle size and distribution. DEA concentrations of 1%, 2%, 3%, 4%, and 5% were applied. The synthesis process involved mixing TiO₂ and ZnO in ethanol, adding DEA, sonication, drying, and calcination. Characterization was conducted using UV-Vis Diffuse Reflectance Spectroscopy (UV-DRS), employing the Kubelka-Munk approach to determine the band gap values. The results indicate that DEA addition significantly reduced the band gap energy to 3.05 eV at the optimal concentration of 4%, attributed to the formation of structural defects and reduced particle size, which expanded the active surface area and shortened the electron excitation distance. However, at 5% DEA concentration, the band gap increased to 3.14 eV due to particle agglomeration. These findings confirm the crucial role of DEA in controlling the optical properties of TiO₂-ZnO, with a 4% concentration offering optimal performance for photocatalytic and solar cell applications. This study demonstrates that chemical additive manipulation during synthesis is an effective strategy for engineering the electronic properties of semiconductors.
Pengaruh Doping Nikel dan Monoethanolamine (MEA) sebagai Zat Aditif terhadap Energi Celah Pita SnO2 Nadya Alexandra; Hary Sanjaya; Alizar Ulianas; Umar Kalmar Nizar
MASALIQ Vol 6 No 1 (2026): JANUARI
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i1.8913

Abstract

The relatively large band gap energy of SnO₂ semiconductors limits their ability to absorb visible light, resulting in suboptimal photocatalytic activity. Although modification of SnO₂ band gap energy through transition metal doping has been widely studied, research that specifically combines nickel doping with the addition of monoethanolamine (MEA) using the sol–gel method remains limited. This study aimed to analyze the effect of nickel doping and MEA addition on the band gap energy of SnO₂ synthesized via the sol–gel method. A quantitative approach with a laboratory experimental design was employed, in which pure SnO₂ and nickel-doped SnO₂ with MEA addition were synthesized as research samples and subsequently characterized using a UV–Diffuse Reflectance Spectrophotometer (UV–DRS). Reflectance data were analyzed using the Kubelka–Munk approach and Tauc plot method to determine band gap energy. The results showed that pure SnO₂ had a band gap energy of 3.59 eV, whereas nickel-doped SnO₂ with MEA addition exhibited a reduced band gap energy of 2.33 eV. These findings indicate that the combination of nickel doping and MEA additive is effective in modifying the optical properties of SnO₂ and extending its light absorption into the visible region, thereby enhancing its potential as a visible-light-driven photocatalytic material. This study contributes to the development of modification strategies for SnO₂-based oxide semiconductors and opens avenues for further research on optimizing dopant and additive compositions as well as directly evaluating the photocatalytic performance of the material.
Pengaruh Doping Ag pada Sintesis Nanopartikel CuO dan Aktivitas Fotokatalitik untuk Degradasi Rhodamin B Aysha Famil Hidayah; Hary Sanjaya; Desy Kurniawati; Deski Beri
MASALIQ Vol 6 No 2 (2026): MARET
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i2.8984

Abstract

Textile dye wastewater contamination, particularly by Rhodamine B, is a serious environmental problem because it is toxic and difficult to degrade naturally. This study aimed to synthesize and evaluate the photocatalytic performance of pure CuO nanoparticles and Ag-doped CuO for the degradation of Rhodamine B. The materials were synthesized using the sol–gel method with an Ag doping concentration of 0.2 mmol. The optical properties were characterized using UV–Diffuse Reflectance Spectroscopy (UV-DRS) in the wavelength range of 185–1100 nm to determine the bandgap energy values using the Kubelka–Munk equation. Photocatalytic activity was tested through the degradation of Rhodamine B under visible light irradiation, with absorbance measurements obtained using a UV–Vis spectrophotometer at a maximum wavelength of 554 nm. The results showed that Ag doping reduced the CuO bandgap from 1.4819 eV to 1.2539 eV. Photocatalytic tests revealed that Ag-doped CuO exhibited higher activity than pure CuO, with Rhodamine B degradation reaching 60.55% at 90 minutes of irradiation, compared with only 32.72% for pure CuO at the same reaction time. This enhanced photocatalytic activity is associated with the role of Ag in suppressing electron–hole recombination, increasing light absorption through the surface plasmon effect, and providing more active sites on the catalyst surface. These findings confirm that Ag-doped CuO has promising potential as an effective photocatalyst for the treatment of textile dye wastewater and the control of environmental pollution.
Sintesis dan Karakterisasi ZnO/Co dengan Aditif Diethanolamine (DEA) dan Uji Aktivitas Katalitiknya pada Zat Warna Congo Red Mutiara Oktaviani; Hary Sanjaya; Trisna Kumala Sari; Riga Riga
MASALIQ Vol 6 No 2 (2026): MARET
Publisher : Lembaga Yasin AlSys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/masaliq.v6i2.9232

Abstract

Congo red is an azo dye widely used in the textile industry; however, its wastewater poses serious environmental problems because it is toxic to aquatic organisms, potentially carcinogenic, causes turbidity, and is difficult to degrade naturally. This study aimed to synthesize cobalt-doped ZnO nanoparticles with the addition of diethanolamine (DEA) as an additive to reduce the ZnO bandgap energy and to evaluate their photocatalytic activity in degrading Congo red dye. The material was synthesized using a sol–gel method with Co doping concentrations of 5%, 10%, 15%, 20%, and 25%, and DEA additions of 1 mL, 2 mL, and 3 mL, respectively. The optical properties were characterized using UV-DRS spectroscopy in the wavelength range of 185–1100 nm, and the bandgap energy was calculated using the Kubelka–Munk equation. Photocatalytic activity tests on Congo red were carried out under visible light (sunlight) and UV irradiation, with monitoring using UV–Vis spectrophotometry at a maximum wavelength of 498 nm. The results showed that the addition of 20% Co doping reduced the ZnO bandgap energy from 3.20 eV to 1.76 eV, and the combination of 20% Co doping with 2 mL DEA produced an optimum bandgap of 1.68 eV. Photocatalytic tests indicated that ZnO/Co 20% with 2 mL DEA exhibited the highest activity, with Congo red degradation percentages of 98.63% under visible light and 98.57% under UV light within 120 minutes of irradiation. These findings demonstrate that cobalt-doped ZnO nanoparticles with DEA as an additive can enhance the photocatalytic activity of ZnO and have potential application as a photocatalyst-based solution for the treatment of textile dye wastewater.
Co-Authors Ali Amran Alizar Ulianas Ananda Putra Aysha Famil Hidayah Basultan Hidayat Deski Beri DESY KURNIAWATI Dina Wirdatul Ummah Fauziah Rahma Yasin Hardeli Hamzah Hardeli Hardeli Indang Dewata Irene Praticia Irwan Iryani Iryani Miftah Patriela Minda Azhar Minda Azhar Mutiara Oktaviani Nadya Alexandra Nopri Andriko Nurhafizah Nurhafizah Olga Tiara Rizki Patriela, Miftah Putri Ayu Rahma Sari Rahmi Fauziah Riga Riga Sakina Cahaya Fatma Septian Budiman Sri Benti Etika Sri Rara Julianti Trisna Kumala Sari Umar Kalmar Nizar Utami Oktavia Yohandri Yusnita Pitri Mayenti