Article
Engineering, Chemical
Ibtissem Bousnoubra, Soumia Fassi, Kamel E. Djebbar
Summary: This study aimed to verify the ability of various photochemical processes to achieve total decolorization and mineralization of the diazo dye Evans Blue. Results showed that Fe(II)/H2O2/UV254 (nm) had the highest decolorization efficiency of 99.9% within 60 minutes. Substrate mineralization efficiency was evaluated using TOC and COD analysis.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2021)
Article
Environmental Sciences
Abel Riaza-Frutos, Agata Egea-Corbacho, Manuel A. Manzano, Jose Maria Quiroga
Summary: In today's industries, there is a need to degrade non-biodegradable compounds before their discharge into the environment. This study focused on the degradation of Orange II, a widely-used azo-dye. The photo-Fenton process was used to study the degradation under different conditions, and it was observed that homogeneous catalysis provided better results in primary degradation and mineralization compared to heterogeneous catalysis.
Article
Engineering, Chemical
Umme Habibah Siddiqua, Shaukat Ali, Sobia Jabeen, Sadia Noor, Asma Tabassum, Nasir Masood, Munawar Iqbal, Arif Nazir
Summary: The study found that the photo-Fenton oxidation process was more effective in decolorization and mineralization of the newly synthesized hetero-functional azo reactive dyes compared to Fenton oxidation. Process parameters significantly affect the mineralization of the dyes.
DESALINATION AND WATER TREATMENT
(2021)
Article
Spectroscopy
Zeinab Ebrahimpour, Olena Pliekhova, Humberto Cabrera, Mahmoud Abdelhamid, Dorota Korte, Komlan Segbeya Gadedjisso-Tossou, Joseph Niemela, Urska Lavrencic Stangar, Mladen Franko
Summary: The experiments demonstrated that TiO2 and Cu/Zr modified TiO2 photocatalysts can efficiently degrade the dye RB19, with UV-Vis absorption spectrometry and thermal lens spectrometry used to elucidate the degradation mechanism. Under UV and simulated solar light, characteristic features such as bleaching of the dye and a slight blue shift in the absorption spectrum of RB19 were observed. Additionally, two different processes responsible for the dye degradation were identified, one under UV light and the other under simulated solar light with longer periods.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Environmental Sciences
Saeedeh Shahbazkhany, Mehdi Salehi, Mehdi Mousavi-Kamazani, Zohreh Salarvand
Summary: Three photocatalyst-adsorbents were synthesized using hydrothermal method, with Zn0.94Mn0.06O showing the highest decolorization efficiency and adsorption capacity, a band-gap of 2.89 eV, and the adsorption mechanism investigated through BET analysis and zeta potential.
ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
Kun Lin, Shahzad Afzal, Liheng Xu, Tao Ding, Feng Li, Ming Zhang
Summary: This study synthesized a Fe-containing red mud biochar (RMBC) as a photo-Fenton catalyst for degrading acid orange 7 (AO7). Results showed that RMBC had excellent degradation performance with a decolorization efficiency of nearly 100% and a mineralization efficiency of 87% under visible light irradiation. The study also revealed the reaction mechanism of RMBC, including the activation of H2O2 by Fe2+ provided by RMBC and the production of more reactive oxygen species (ROS) for AO7 degradation under light irradiation.
ENVIRONMENTAL POLLUTION
(2023)
Article
Engineering, Environmental
Rengyu Yue, Tiantian Chen, Zhibin Ye, Benoit Barbeau, Md. Saifur Rahaman
Summary: Reactive membranes have been widely studied for wastewater purification, with a focus on graphene oxide in this particular study. By manipulating the band gap of graphene oxide, a photo-Fenton GO membrane with improved characteristics was successfully prepared, showing enhanced permeability and dye removal efficiency in a synergistic photo-Fenton/filtration system. The GO membrane also displayed high stability, anti-fouling capabilities, and promising potential for advanced wastewater purification applications.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Gokulakrishnan Subramanian, Halan Prakash
Summary: The visible light/Cu(II)/H2O2 system showed enhanced disinfection compared to the Cu(II)/H2O2 system without the need for reducing agents or organic ligands. Experimental results demonstrated that the visible light/Cu(II)/H2O2 system caused significant damage to bacterial cell membranes and proposed a ligand to metal charge transfer mechanism for enhanced disinfection. Energy efficiency and cost-effectiveness of the visible light/Cu(II)/H2O2 system were determined to be favorable for practical applications.
Article
Electrochemistry
Rui Wang, Jiashun Cao, Junsong Song, Jiajia Liu, Yifei Zhang
Summary: This study focused on the study and application of BDD/air-diffusion cell for the decolorization of AR1 using EF and PEF as electrochemical advanced oxidation techniques. The results showed that PEF method had higher color removal efficiency and could quickly destroy and mineralize azo dye-contaminated wastewater.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Environmental Sciences
Oscar Olea-Mejia, Sharon Brewer, Kingsley Donkor, Deysi Amado-Pina, Reyna Natividad
Summary: This study demonstrates the use of Cu2O/Al2O3 as a catalyst in the photo-Fenton process. The synthesized Cu2O nanoparticles effectively degrade bisphenol A (BPA), achieving 100% removal and 91% mineralization in 60 minutes. The presence of Cu2O nanoparticles enhances the production of OH radicals, resulting in a significant increase in the oxidation rate of BPA. Furthermore, switching from alpha-Al2O3 to gamma-Al2O3 further improves the initial oxidation rate of BPA.
Article
Environmental Sciences
Akhilesh Modi, Sunita Singh, Jyoti Patki, Naveen Padmadas
Summary: The removal of synthetic textile dyes is a challenge for the textile industry and the environment. This study isolated potent bacteria for dye decolorization from rhizospheric soil of mangrove plants and investigated their abilities through various techniques.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Hank Hui-Hsiang Lin, Angela Yu-Chen Lin
Summary: Cytostatic drugs are commonly found in wastewater effluents due to their poor biodegradability, but the Fe(III)-EDDS complex has shown to efficiently degrade cyclophosphamide and 5-fluorouracil under solar light. The addition of EDDS widens the operational pH range of the solar photo-Fenton process, and a suitable Fe(III):EDDS ratio and initial dissolved oxygen level impact the degradation performance. Rapid degradation of the drugs was achieved within 1.5 minutes in the solar photo-Fenton process, with potential for total mineralization under relatively low Fe(III) concentration and H2O2 dosage.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Guang Guo, Chong Liu, Jiuxiao Hao, Fang Tian, Keqiang Ding, Can Zhang, Feng Yang, Tingfeng Liu, Jin Xu, Zhengbing Guan
Summary: A halo-thermophilic bacterial consortium capable of decolorizing azo dye under high salinity and temperature conditions was enriched in this study, with Bacillus identified as the dominant genus playing a key role in the decolorization process. The consortium demonstrated effectiveness in decolorization of metanil yellow G across a wide range of pH values, temperatures, dye concentrations, and salinities. Additionally, various enzymes such as laccase, manganese peroxidase, lignin peroxidase, and azoreductase were found to be involved in the decolorization process, with a proposed pathway for decolorization based on GC-MS and FTIR results.
Article
Environmental Sciences
R. P. Nippes, P. D. Macruz, L. C. A. Molina, M. H. N. O. Scaliante
Summary: The study successfully prepared a solid iron catalyst for efficient degradation of food coloring using the heterogeneous solar-Fenton process. The catalyst was produced through wet ion exchange and characterized using various techniques. Under the experimental conditions, the catalyst showed high efficiency and stability when reacting with natural sunlight, and it could be used for multiple cycles.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Hulya Karaca, Berke Kisaoglan, A. Tansu Koparal, Merih Kivanc
Summary: Wastewater contaminated with azo dyes from the textile industry has a negative impact on the environment, but using white-rot fungus Sporotrichum sp. for decolorization treatment is an environmentally friendly, economical, and sustainable solution. The fungus has a high decolorization efficiency and both the alive and dead cells show impressive decolorization potential for reactive blue 13.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Genta Yanagi, Mai Furukawa, Ikki Tateishi, Hideyuki Katsumata, Satoshi Kaneco
Summary: By introducing the SnO2-Sb2O3 intermediate layer and Bi oxide, the study successfully improved the electrochemical decolorization efficiency and durability of the PbO2 electrode. The electrodeposition of the PbO2 layer was enhanced and its crystal structure strengthened, resulting in complete decolorization of methylene blue dye.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Shuhei Kuwahara, Ikki Tateishi, Mai Furukawa, Hideyuki Katsumata, Satoshi Kaneco
Summary: The ultra-thin graphene/g-C3N4 nanosheets with in-plane heterojunction were prepared to enhance photocatalytic hydrogen evolution under visible light, showing significantly improved activity, stability, and efficiency. The in-plane graphene modification increased visible-light absorption and promoted electron-hole pair separation, while the ultra-thin nanosheets provided abundant active sites and specific surface area. This study provides an efficient method to prepare g-C3N4-based photocatalysts for metal-free photocatalytic hydrogen evolution.
MATERIALS TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Hideyuki Katsumata, Md Ashraful Islam Molla, Jahida Binte Islam, Ikki Tateishi, Mai Furukawa, Satoshi Kaneco
Summary: Researchers have successfully synthesized a ternary composite photocatalyst with high catalytic activity for the fast degradation of organic pollutants under visible light.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Abdus Samad, Mai Furukawa, Ikki Tateishi, Hideyuki Katsumata, Satoshi Kaneco
Summary: This study explores the use of Cu2+ ions and CuO as co-catalysts to enhance the efficiency of WO3 in the visible light-driven photocatalytic oxidation of arsenite. The addition of Cu2+ was found to effectively suppress the dissolution of WO3, while the efficiency of CuO was slightly lower. The results show that significant improvement in the efficiency of photocatalytic oxidation of As(III) with WO3 can be achieved by adding Cu2+ ions and CuO.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Jahida Binte Islam, Md Rakibul Islam, Mai Furukawa, Ikki Tateishi, Hideyuki Katsumata, Satoshi Kaneco
Summary: This study investigated the photocatalytic reduction of Cr6+ to Cr3+ in an aqueous solution using 3 wt% Ag/g-C3N4 and ethylenediaminetetraacetic acid (EDTA). The addition of Ag and EDTA greatly improved the photocatalytic reduction efficiency of Cr6+ using g-C3N4. Among the tested catalysts, Ag/g-C3N4 with EDTA showed the best performance. The optimal EDTA concentration was found to be 500 mg L-1 for Ag/g-C3N4 photocatalyst.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Erisa Sugiura, Mai Furukawa, Ikki Tateishi, Hideyuki Katsumata, Satoshi Kaneco
Summary: The Ag/Ag2O-modified ZnO photocatalyst prepared by a simple method showed excellent performance in degrading the organic pollutant DBP, being four times more efficient than zinc oxide alone. The addition of Ag and Ag2O increased the total pore volume of the photocatalyst, leading to an increase in active sites. The efficient electron transfer of Ag/Ag2O/ZnO was found to be responsible for the enhanced activity.
JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
(2022)
Article
Materials Science, Composites
Mahmudul Hassan Suhag, Ikki Tateishi, Mai Furukawa, Hideyuki Katsumata, Aklima Khatun, Satoshi Kaneco
Summary: Titanium dioxide nanotubes (TNTs) were fabricated via electrochemical anodization process and investigated for photocatalytic hydrogen generation from formic acid solution. The optimal conditions for TNTs were found to be a calcination temperature of 500 degrees C and a calcination time of 10 h. The TNTs with photodeposited Rh metal showed excellent stability for hydrogen generation from formic acid solution.
JOURNAL OF COMPOSITES SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Mahmudul Hassan Suhag, Aklima Khatun, Ikki Tateishi, Mai Furukawa, Hideyuki Katsumata, Satoshi Kaneco
Summary: The ZnO/g-C3N4 composite was successfully synthesized and characterized. The composite showed 8 times higher degradation rate of BPE compared to pure g-C3N4. The excellent photocatalytic activity was attributed to the synergistic effect between g-C3N4 and ZnO, which improved charge separation, reduced recombination, and increased visible light absorption.
Article
Chemistry, Multidisciplinary
Mahmudul Hassan Suhag, Hideyuki Katsumata, Ikki Tateishi, Mai Furukawa, Satoshi Kaneco
Summary: This study successfully incorporated aromatic benzene rings and black phosphorus into graphitic carbon nitride (g-C3N4) photocatalysts, resulting in stable composite materials with improved hydrogen production rates under visible-light irradiation. The introduction of these components enhanced light absorption and reduced electron-hole recombination, leading to improved charge transfer efficiency and higher photocatalytic activity.
Article
Chemistry, Physical
Mai Furukawa, Daichi Iwamoto, Koki Inamori, Ikki Tateishi, Hideyuki Katsumata, Satoshi Kaneco
Summary: Novel tungsten-modified mixed-valence tin oxides (Sn3O4) were successfully prepared by the solvothermal method using tin (II) chloride dihydrate and sodium tungstate (IV) dihydrate as precursors, with cetyltrimethylammonium bromide (CTAB) as the assistant. The presence of tungsten and the optimized amount of CTAB in the preparation method enhanced the photocatalytic dye degradation reaction, achieving almost complete decolorization of methyl orange within 40 minutes. The improved photocatalytic activity of the W-Sn3O4 catalyst was attributed to increased reduction power, enhanced separation of electron-hole pairs, extended visible light absorption range, and optimized band structure by CTAB additive.
Article
Materials Science, Composites
Mahmudul Hassan Suhag, Ikki Tateishi, Mai Furukawa, Hideyuki Katsumata, Aklima Khatun, Satoshi Kaneco
Summary: Biodiesel, as a sustainable energy alternative, can be produced by synthesizing glycerol, which is a byproduct of biodiesel synthesis. In this study, the photocatalytic biohydrogen generation using ZnO with the aid of simultaneous deposition of copper from an aqueous biomass-derivative glycerol solution was investigated. The concentration of glycerol solution, Cu ion concentration, and reaction temperature were found to affect the biohydrogen production rate. Furthermore, the photocatalytic H2 production efficiency with ZnO could be improved by simultaneous Cu deposition.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Chemistry, Physical
Monir Uzzaman, Mahmudul Hassan Suhag, Hideyuki Katsumata, Ikki Tateishi, Mai Furukawa, Satoshi Kaneco
Summary: In this study, isotype heterojunction formation and aromatic ring incorporation were combined to enhance the photocatalytic hydrogen-generating activity of graphitic carbon nitride (g-C3N4). The modified g-C3N4 showed significantly improved morphology, bandgap, charge-carrier separating tendency, and hydrogen production rate under visible-light irradiation. The efficiency and durability of the modified photocatalyst were validated, and theoretical calculations confirmed the experimental findings.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Chemical
Mahmudul Hassan Suhag, Ikki Tateishi, Mai Furukawa, Hideyuki Katsumata, Aklima Khatun, Satoshi Kaneco
Summary: This study investigates the photocatalytic production of hydrogen using a formic acid solution with titanium dioxide (TiO2) and simultaneous deposition of rhodium (Rh). The optimal conditions for the reaction were determined, and the Rh/TiO2 photocatalysts were characterized using various techniques. The proposed reaction mechanism for the photocatalytic hydrogen production from formic acid by Rh/TiO2 was also discussed.
Article
Chemistry, Multidisciplinary
Md Ashraful Islam Molla, Hideyuki Katsumata, Mai Furukawa, Ikki Tateishi, Satoshi Kaneco
Summary: This research presents a straightforward method for synthesising thrice-modified g-C3N4 and evaluates its properties as a photocatalyst. The modified g-C3N4 exhibited significantly enhanced activity for bisphenol A degradation compared to the pristine form. The improved performance can be attributed to the specific structural modifications, including enhanced surface area, energy band structure changes, efficient charge separation and low electron-hole recombination rate.
NEW JOURNAL OF CHEMISTRY
(2022)
