The Composite of ZrO2-TiO2 Produced from Local Zircon Sand Used as A Photocatalyst for The Degradation of Methylene Blue in A Single Batik Dye Wastewater

Permadani, Ita; Phasa, Dhini A.; Pratiwi, Andini; Rahmawati, Fitria

doi:10.9767/bcrec.11.2.539.133-139

Cited by 10 publications

(6 citation statements)

References 21 publications

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“…The rate constant calculation in Rhodamine B photodegradation under blue light irradiation was also investigated using the pseudofirst-order kinetics model [26][27], as follows the formula: ln (C0/C) = kt; where k is the rate Table 1, the photocatalytic reaction of Rhodamine B followed the pseudo-first-order-kinetics model. The rate constant of Ag3PO4, Ag3PO4-0.05, Ag3PO4-0.15, and Ag3PO4-0.30 photocatalyst are 0.144, 0.597, 0.498, and 0.342 min -1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Ag3PO4 Photocatalyst with Varied Ammonia Concentration and Its Photocatalytic Activities For Dye Removal

Febiyanto

Soleh

Amal

et al. 2018

Bull. Chem. React. Eng. Catal.

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The highly active photocatalyst of Ag3PO4 could be synthesized under ammonia solution using the facile co-precipitation method with the starting material of AgNO3 and Na2HPO4.12H2O. The variation of ammonia concentration was designed at 0.00, 0.05, 0.15, and 0.30 M. The products were characterized using X-ray diffraction, UV-diffuse reflectance spectroscopy, and scanning electron microscopy. The photocatalytic activities were evaluated using the Rhodamine B degradation under blue light irradiation. The effect of calcination, pH condition, and visible light source irradiation was carried out in the experiment. The highest photocatalytic activity was found in the sample prepared using the addition of ammonia solution at the concentration of 0.05 M. This photocatalytic activity was 4.13 times higher compared to the Ag3PO4 prepared without the ammonia. The effective condition of photocatalytic activity was achieved at the sample prepared without calcination, degradation at pH of 7 and under blue light irradiation. dye removal. Silver orthophosphate has the band gap energy of 2.36 eV, that can absorb solar energy shorter than ~530 nm [1-6], possess stronger photo-oxidative capability than the previous photocatalyst [7-9], generating O2 from water splitting with a quantum efficiency nearly 90% in visible light irradiation [10]. In order to improve its photocatalytic activity in the visible light region, many approaches have been performed especially in catalyst fabrication design

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Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Ag3PO4 Photocatalyst with Varied Ammonia Concentration and Its Photocatalytic Activities For Dye Removal

Febiyanto

Soleh

Amal

et al. 2018

Bull. Chem. React. Eng. Catal.

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“…Batik wastewater is usually obtained from the remaining water from the dyeing and washing process. This wastewater contains chemicals added during the process, such as dyes, starch, oil, wax, lye, and detergents [ 1 ]. These substances are generally non-biodegradable, so that they will accumulate in soil and water and cause environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Polysulfone–Polyvinyl Pyrrolidone Blend Polymer Composite Membranes for Batik Industrial Wastewater Treatment

et al. 2021

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Batik wastewater, in general, is colored and has high concentrations of BOD (biological oxygen demand), COD (chemical oxygen demand), and dissolved and suspended solids. Polysulfone (PSf)-based membranes with the addition of polyvinyl pyrrolidone (PVP) were prepared to treat batik industrial wastewater. PSf/PVP membranes were prepared using the phase inversion method with N-methyl-2 pyrrolidone (NMP) as the solvent. Based on the membrane characterization through FESEM, water contact angle, porosity, and mechanical tests showed a phenomenon where the addition of PVP provided thermodynamic and kinetic effects on membrane formation, thereby affecting porosity, thickness, and hydrophilicity of the membranes. The study aims to observe the effect of adding PVP on polysulfone membrane permeability and antifouling performance on a laboratory scale through the ultrafiltration (UF) process. With the addition of PVP, the operational pressure of the polysulfone membrane was reduced compared to that without PVP. Based on the membrane filtration results, the highest removal efficiencies of COD, TDS (total dissolved solid), and conductivity achieved in the study were 80.4, 84.6, and 83.6%, respectively, on the PSf/PVP 0.35 membrane operated at 4 bar. Moreover, the highest color removal efficiency was 85.73% on the PSf/PVP 0.25 operated at 5 bar. The antifouling performance was identified by calculating the value of total, reversible, and irreversible membrane fouling, wherein in this study, the membrane with the best antifouling performance was PSf/PVP 0.25.

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“…Until now, the primary challenge has been to generate charge carriers using visible light rather than UV radiation. Different methodologies have been used to modify the TiO 2 absorption properties, such as doping with transition metals [8][9][10][11][12][13][14] or main group elements [15][16][17][18][19][20][21][22][23][24], and synthesize composites like ZrO 2 /TiO 2 , reducing the recombination of charge carriers by aligning the energy gaps [25,26]. Charge carriers act as oxidation and reduction centers, which enable the creation of reactive species such as hydroxyl radicals, peroxides, or acid compounds.…”

Section: Introductionmentioning

confidence: 99%

C-, N-, S-, and F-Doped Anatase TiO₂ (101) with Oxygen Vacancies: Photocatalysts Active in the Visible Region

González-Torres

Poulain

Domínguez-Soria

et al. 2018

International Journal of Photoenergy

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Anatase TiO2 presents a large bandgap of 3.2 eV, which inhibits the use of visible light radiation (λ > 387 nm) for generating charge carriers. We studied the activation of TiO2 (101) anatase with visible light by doping with C, N, S, and F atoms. For this purpose, density functional theory and the Hubbard U approach are used. We identify two ways for activating the TiO2 with visible light. The first mechanism is broadening the valence or conduction band; for example, in the S-doped TiO2 (101) system, the valence band is broadened. A similar process can occur in the conduction band when the undercoordinated Ti atoms are exposed on the TiO2 (101) surface. The second mechanism, and more efficient for activating the anatase, is to generate localized states in the gap: N-doping creates localized empty states in the bandgap. For C-doping, the surface TiO2 (101) presents a “cleaner” gap than the bulk TiO2, resulting in fewer recombination centers. The dopant valence electrons determine the number and position of the localized states in the bandgap. The formation of charge carriers with visible light is highly favored by the oxygen vacancies on TiO2 (101). The catalytic activity of C-doping using visible radiation can be explained by its high absorption intensity generated by oxygen vacancies on the surface. The intensity of the visible absorption spectrum of doped TiO2 (101) follows the order: C > N > F > S dopant.

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The Composite of ZrO2-TiO2 Produced from Local Zircon Sand Used as A Photocatalyst for The Degradation of Methylene Blue in A Single Batik Dye Wastewater

Cited by 10 publications

References 21 publications

Facile Synthesis of Ag3PO4 Photocatalyst with Varied Ammonia Concentration and Its Photocatalytic Activities For Dye Removal

Facile Synthesis of Ag3PO4 Photocatalyst with Varied Ammonia Concentration and Its Photocatalytic Activities For Dye Removal

Polysulfone–Polyvinyl Pyrrolidone Blend Polymer Composite Membranes for Batik Industrial Wastewater Treatment

C-, N-, S-, and F-Doped Anatase TiO₂ (101) with Oxygen Vacancies: Photocatalysts Active in the Visible Region

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The Composite of ZrO2-TiO2 Produced from Local Zircon Sand Used as A Photocatalyst for The Degradation of Methylene Blue in A Single Batik Dye Wastewater

Cited by 10 publications

References 21 publications

Facile Synthesis of Ag3PO4 Photocatalyst with Varied Ammonia Concentration and Its Photocatalytic Activities For Dye Removal

Facile Synthesis of Ag3PO4 Photocatalyst with Varied Ammonia Concentration and Its Photocatalytic Activities For Dye Removal

Polysulfone–Polyvinyl Pyrrolidone Blend Polymer Composite Membranes for Batik Industrial Wastewater Treatment

C-, N-, S-, and F-Doped Anatase TiO2 (101) with Oxygen Vacancies: Photocatalysts Active in the Visible Region

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C-, N-, S-, and F-Doped Anatase TiO₂ (101) with Oxygen Vacancies: Photocatalysts Active in the Visible Region