Article
Environmental Sciences
Yoki Yulizar, Iman Abdullah, Rizki Marcony Surya, Naya Luvy Alifa
Summary: Recently, there have been advancements in using chemistry materials, such as TiO2/YMnO3 photocatalyst, for water purification to achieve the sustainable development goal of clean water and sanitation. TiO2/YMnO3 showed a higher photocatalytic activity and stability in the visible light region compared to TiO2. The enhanced performance is attributed to the formation of a TiO2/YMnO3 heterojunction, a narrower bandgap, and excellent charge carrier separation. This study provides insights into the green synthesis of TiO2-based photocatalysts for efficient degradation of organic dyes in water purification.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
Ali Zolfaghari, Mehran Riazian, Mohsen Ashjari
Summary: Iron, sulfur, and poly(ethylene glycol) doped TiO2 nanoparticles exhibit significant catalytic activity for the degradation of methylene blue and Evans blue under visible light. Different catalysts show varying photocatalytic reaction constants and optical band gap values, while lattice structure determination is most accurate using the SSP model. X-ray analysis and characterization techniques like BET, Fe-SEM, and TEM were used to correlate with the results.
RESEARCH ON CHEMICAL INTERMEDIATES
(2021)
Article
Chemistry, Physical
Italo Lacerda Fernandes, Danns Pereira Barbosa, Sergio Botelho de Oliveira, Valdeir Antonio da Silva, Marcelo Henrique Sousa, Marly Montero-Munoz, Jose A. H. Coaquira
Summary: The study demonstrates that the double-coated magnetic nanoparticles nanocomposites exhibit excellent photocatalytic activity with strong degradation capability against methylene blue dye, as well as high stability. These nanocomposites have great potential for applications in wastewater treatment and purifying contaminants.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Heshan Liyanaarachchi, Charitha Thambiliyagodage, Chamika Liyanaarachchi, Upeka Samarakoon
Summary: The release of dyes into water reservoirs is a significant environmental problem, and finding methods to remove such dyes is crucial. In this study, a novel photocatalyst, Cu-doped TiO2 coupled with g-C3N4 (Cu-TiO2/g-C3N4), was successfully fabricated by hydrothermal method at different weight percentages. The synthesized Cu-TiO2/g-C3N4 photocatalysts showed high degradation efficiency for methylene blue under UV and visible light, with Cu-TiO2/50% g-C3N4 exhibiting the highest rate constant. Therefore, Cu-TiO2/g-C3N4 can effectively degrade methylene blue.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Polymer Science
Bircan Haspulat Taymaz, Recep Tas, Handan Kamis, Muzaffer Can
Summary: Polyaniline (PANI) and neutral Polyaniline (NPANI) were synthesized in acetonitrile-water mixture and used for photocatalytic degradation of dyes. NPANI showed efficient degradation of dyes under UV light, and factors influencing photocatalytic performance were examined.
Article
Materials Science, Multidisciplinary
D. Ramos-Alvarez, Y. M. Hernandez-Rodriguez, J. Vega-Gomez, O. E. Cigarroa-Mayorga
Summary: Zinc oxide nanoflakes (ZnONfs) were synthesized using an electrodeposition method with a copper (Cu) foil as a support. The Cu-ZnONfs junction was confirmed by electron microscopy, and the ZnONfs exhibited a hexagonal-like morphology with an average thickness below 50 nm. The heterostructure of Cu-ZnONfs promoted enhanced efficiency and resistivity in the degradation of methylene blue (MB) through photocatalytic activity. X-ray photoelectron spectroscopy revealed a variation of oxygen vacancies in the Cu-ZnO heterostructure due to the presence of the Cu substrate.
Article
Green & Sustainable Science & Technology
Yongchang Sun, Lu Bai, Caohui Han, Xintian Lv, Xiaoyin Sun, Tingting Wang
Summary: A novel polymer material with high adsorption selectivity and quick adsorption capability has been successfully synthesized in this study. The material, using methylene blue as the target molecule, shows excellent adsorption and photodegradation performance in wastewater.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Chemistry, Applied
Priya Sharma, Harshita Laddha, Madhu Agarwal, Ragini Gupta
Summary: A new FG-g-AM-cl-MBA-MnO2 hydrogel was synthesized using fenugreek gum, acrylamide, N, N'-methylenebisacrylamide, potassium persulfate, and MnO2 for removal of methylene blue and malachite green dyes from water. The hydrogel showed porous and rough surface morphology with good adsorption capacity. It effectively removed malachite green and methylene blue, and remained stable during adsorption process and could be reused multiple times.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
M. M. Almoneef, J. Rouabeh, M. Mbarek
Summary: This research presents a theoretical evaluation and explanation of the adsorption mechanisms of methylene blue or malachite green dyes on a metalloporphyrin [Co-II(TMPP)]. The study reveals that the adsorption is influenced by temperature and occurs through a molecular aggregation process in aqueous solution. The findings provide insights into the physico-chemical parameters governing the adsorption of organic molecules on the surface of [Co-II(TMPP)].
Article
Electrochemistry
Siti Naqiyah Sadikin, Jaenudin Ridwan, Marjoni Imamora Ali Umar, Aini Ayuni Mohd Raub, Jumril Yunas, Azrul Azlan Hamzah, Dahyunir Dahlan, Mohd Yusri Abd Rahman, Akrajas Ali Umar
Summary: This paper discusses the synthesis process of porous TiO2 film on a glass substrate using the doctor's blade method. The resulting TiO2 film has a thickness of 25.05 μm and nanoparticle size of around 100 nm. The film shows no impurities according to energy dispersive spectroscopy mapping, and the XRD analysis confirms its anatase structure. The porous TiO2 film with a bandgap energy of approximately 3.2 eV exhibits a photocatalytic degradation rate of 90%.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2023)
Article
Environmental Sciences
Stefany G. de Moura, Ligiane C. L. Dauzakier, Leydiane O. Pereira, Teodorico C. Ramalho, Luiz C. A. de Oliveira, Fabiano Magalhaes
Summary: By introducing iron oxides to modify TiO2 photocatalysts, the synthesized materials with magnetic properties exhibited lower bandgap values, enabling absorption of visible light and separation from the reaction medium with the application of a magnetic field. This led to enhanced photodegradation efficiency of methylene blue and paracetamol.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Physical
Qi Zhang, Liangyun Yu, Bairen Yang, Chenchen Xu, Wang Zhang, Qi Xu, Guowang Diao
Summary: In this study, a Fe3O4@Ru-doped TiO2 photocatalyst was successfully developed using a simple chemical strategy. The sample with 0.2% Ru doping exhibited the best photocatalytic activity, degrading 70.20% of methylene blue after 120 minutes of simulated sunlight exposure, and maintaining good degradation efficiency and recovery after 5 cycles. The Ru doping was found to reduce the band gap energy, facilitate the generation of electron-hole pairs, and enhance carrier separation efficiency, highlighting the potential for simple preparation of recoverable photodegradation catalysts for environmental organic pollutants.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Chemistry, Physical
Nirmal Kumar Shee, Hee-Joon Kim
Summary: A series of porphyrin-based ionic complexes were prepared by reacting two porphyrin precursors with various acids. These complexes exhibited different self-assembled nanostructures and the counter anions played an important role in bridging and controlling the morphology and photocatalytic properties of the materials.
Article
Green & Sustainable Science & Technology
Omayma Bouzekri, Sabah El Gamouz, Abdelaziz Ed-Dra, Hamou Moussout, Younes Dehmani, Hamid Ziyat, Mostafa El Idrissi, M'barek Choukrad, Sadik Abouarnadasse
Summary: In this study, silver-doped nickel and copper nanoparticles were synthesized via a green method using H. scoparia leaf extract. The synthesized nanoparticles exhibited good adsorption and photocatalytic properties for dye removal. The nanoparticles doped with silver showed the best performance in dye removal and the addition of silver significantly improved the photocatalytic performance. These nanoparticles also exhibited moderate antimicrobial activity against tested bacteria. The green synthesis of nanoparticles from H. scoparia leaf extract shows promise as a sustainable alternative for dye removal.
Article
Nanoscience & Nanotechnology
Gustavo Z. Girotto, Alisson S. Thill, Livia P. Matte, Marco A. H. Vogt, Thiago V. Machado, Luis F. P. Dick, Fabiano Mesquita, Fabiano Bernardi
Summary: This study investigates the different acting mechanisms of photocatalysts by heating nickel nanoparticles and supporting them on SrTiO3. It found that there is a direct association between the nickel oxidation state and the atomic mechanism of photodegradation, which improves the degradation of methylene blue.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Organic
Sana Jamshaid, Yong Rok Lee
Summary: A novel, facile, and efficient Lewis-acid-catalyzed [4 + 1] annulation protocol has been developed for the construction of functionalized polycyclic-fused furans. This methodology provides a rapid synthetic route to divergently orientated polycyclic furans in good yields, without the need for transition metals and ligands. Additionally, this protocol can be used to synthesize multisubstituted furans.
Article
Chemistry, Organic
Sagar D. Nale, Hari Datta Khanal, Yong Rok Lee
Summary: A palladium-catalyzed desulfitative coupling of quinoxalin-2(1H)-ones with arylsulfonyl chlorides is demonstrated. The reaction allows for the synthesis of C3-arylquinoxalin-2(1H)-ones. The method enables successful coupling of chloro- and fluoro-aryl sulfonyl chlorides with quinoxalin-2(1H)-ones without carbon-halogen bond cleavage.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Raju S. Thombal, Peter Yuosef M. Rubio, Daesung Lee, Debabrata Maiti, Yong Rok Lee
Summary: Metal catalyzed cascade C-H activation/annulation is a highly promising approach for the construction of aromatic and heteroaromatic compounds. Pd-complexes play a crucial role in this method, enabling high catalytic efficiency through the activation of molecules bearing a directing group.
Article
Chemistry, Applied
Mohammad Aslam, Shreedhar Devkota, Sana Jamshaid, Yong Rok Lee
Summary: A synthetic strategy for the installation of diversely functionalized quinones at the C4 position of indoles has been developed. This method provides a rapid and efficient route to a variety of 4-quinonylindoles and biologically interesting bis(indol-4-yl)quinones.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Eswaran Kamaraj, Yong Rok Lee, Kavitha Balasubramani
Summary: In this study, a new NiWO4/SnO2 p-n heterojunction photocatalyst was successfully synthesized for effective degradation of organic dye Amaranth. Characterization analyses revealed that the p-n heterojunction photocatalyst greatly enhance charge generation and suppress electron-hole recombination, leading to improved photocatalytic performance. The NiWO4/SnO2 photocatalyst showed the highest degradation efficiency of 93% for Amaranth after 180 min.
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Hyo Seon Sim, Hari Datta Khanal, Yong Rok Lee
Summary: In this paper, a highly efficient and atom-economic iron(III)-catalyzed three-component heteroannulation reaction is described for the construction of multifunctionalized 2-pyridones. The protocol allows rapid access to a variety of 2-pyridones with an ortho-hydroxybenzoyl and a benzoyl scaffold under simple conditions. The synthetic utility of the synthesized 2-pyridone scaffolds is demonstrated by transforming them into biologically interesting complex heterocycles.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Environmental Sciences
Ramaraj Sukanya, Sonaimuthu Mohandoss, Yong Rok Lee
Summary: This paper presents a one-pot hydrothermal synthesis method to prepare Mo-doped MnWO4 NCs for the electrochemical detection of NTZ. The introduction of defect engineering on metal tungstates shows promising potential in developing high-performance sensing materials for drug molecules.
Review
Environmental Sciences
Sourav Prusty, Prathap Somu, Jitendra Kumar Sahoo, Debasish Panda, Sunil Kumar Sahoo, Shraban Kumar Sahoo, Yong Rok Lee, T. Jarin, L. Syam Sundar, Koppula Srinivas Rao
Summary: Groundwater contamination, particularly the pollution caused by nuclear power plants and their by-products, is a significant concern. Adsorption has emerged as a simple, effective, and cost-efficient method for addressing this issue.
Article
Chemistry, Applied
Shreedhar Devkota, Muhammad Saeed Akhtar, Yong Rok Lee
Summary: This study explores the rhodium(III)-catalyzed sp(2)/sp(3) C-H activation/annulation of 2-arylquinazolin-4(3H)-ones with 3-methylmaleimides. Diversely functionalized isoindoloquinazolinones were obtained in good yields upon reaction with various maleimides. This Rh(III)-catalyzed protocol can be applied for the chemo- and diastereoselective synthesis of various polyheterocycles.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Applied
Perumal Muthuraja, Muhammad Saeed Akhtar, Purushothaman Gopinath, Yong Rok Lee
Summary: A substrate-controlled [4+1] annulation of sulfoxonium ylides with maleimides via Rh(III)-catalyzed C-H bond activation is developed, providing diversely functionalized indanonylpyrroline-2,5-dione derivatives and biologically intriguing spiroindanonylpyrroline-2,5-diones. This methodology offers a broad substrate scope, good functional group tolerance, and diastereoselectivity.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Applied
Eswaran Kamaraj, Prasanta Roy, Yong Rok Lee
Summary: A rhodium-catalyzed [5+1] cycloaddition through C-H activation/O-annulation strategy is described for synthesizing biologically interesting isochromenes. This method selectively provides divergently functionalized isochromenes containing spirosuccinimide and maleimide scaffolds based on the maleimides and itaconimides used as substrates. It demonstrates a broad substrate scope, remarkable functional group tolerance, and high regioselectivity.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Organic
Hari Datta Khanal, Karuna Mahato, Yong Rok Lee
Summary: An effective and unprecedented In(III)-catalyzed benzannulation of 3-formyl-4-pyrones with simple arylacetylenes is reported, which enables their conversion into structurally diverse salicylaldehyde-bearing ortho-terphenyl frameworks. This transformation is achieved via an In(III)-catalyzed C-O bond extrusion and proceeds without the requirement for an external oxidant. The synthetic utility of this protocol is demonstrated by the transformation of the obtained product into molecules with bisindole, chromene, and oxime moieties.
Article
Chemistry, Multidisciplinary
Esakkimuthu Shanmugasundaram, Vigneshkumar Ganesan, Vimalasruthi Narayanan, Kannan Vellaisamy, Rajaram Rajamohan, Yong Rok Lee, Selvam Kaliyamoorthy, Stalin Thambusamy
Summary: Carbon quantum dots (CQDs) have exceptional optical and electrical qualities, making them important for various applications. Heteroatom-doped CQDs, such as B-CQDs, N-CQDs, and F-CQDs, were synthesized and their bandgap characteristics, absorption patterns, and emission characteristics were examined. Photoactive films were created by electropolymerizing PANI into the CQDs, and their photophysical and electronic characteristics were analyzed. The PANI-N-CQD film showed great potential as a photoactive material for organic solar cell applications.
NEW JOURNAL OF CHEMISTRY
(2023)
Review
Chemistry, Organic
Hari Datta Khanal, Muthuraja Perumal, Yong Rok Lee
Summary: The reduction of the stable nitro group is a fundamental and widely used transformation for the construction of complex and functionalized heterocyclic architectures. The reactivity of the nitro group in the 2-nitrostyrene moiety not only triggers the formation of carbon-nitrogen bonds, but also offers the opportunity for annulation and heteroannulation, providing a cascade process for the synthesis of highly conjugated natural and unnatural molecules. This review comprehensively discusses the use of 2-nitrostyrene motifs in the synthesis of various N-heterocycles, highlighting their important features, reactivities, and mechanisms.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Organic
Eun Hee Cho, Muhammad Saeed Akhtar, Mohammad Aslam, Raju S. Thombal, Xin Li, Jae-Jin Shim, Yong Rok Lee
Summary: The selective activation of carbazoles and indolines via transition metal-catalyzed reactions allows for the rapid installation of succinimide groups at specific positions, demonstrating the intrinsic reactivity of indolines and mild reaction conditions to generate succinimide-substituted indoles.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Girgis Obaid, Menitte Eroy, Jie Zhao, Shazia Bano, Mari Mino-Kenudson, Tayyaba Hasan
Summary: The presence of desmoplasia in pancreatic ductal adenocarcinoma (PDAC) is associated with poor treatment outcomes and reduced drug delivery. By analyzing collagen subtypes in PDAC tumors following different treatment regimens, immunofluorescence profiling can predict long-term survival and tumor growth inhibition. This information can aid in personalized treatment and improve patient survival.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2024)
Article
Biochemistry & Molecular Biology
Fatemeh Malekpour, Rashin Bahrami, Mahshid Hodjat, Neda Hakimiha, Behnam Bolhari, Aidin Sooratgar, Soheil Niavarzi
Summary: This study investigated the effect of photobiomodulation (PBM) therapy using an 808 nm diode laser on cellular modulation mechanisms in regenerative endodontic procedures (REPs). The results showed that PBM treatment significantly increased cell viability and migration, and enhanced the release of TGF-131 from dentin.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2024)
Article
Biochemistry & Molecular Biology
Pranathi Tata, Ramakrishnan Ganesan, Jayati Ray Dutta
Summary: Thin film coatings with potent antibacterial properties are widely used in medical devices, frequently touched surfaces, and food packaging. However, achieving antibacterial performance under both light and dark conditions remains a challenge. In this study, we successfully prepared AgBr-coated ZnO nanorod thin film architecture using a unique surfactant-mediated solution-phase spin-coating approach. The resulting structures showed dual functionality as antimicrobial agents and photosensitizers, effectively enhancing the visible-light photodisinfection efficacy of ZnO nanorods. The concentration of the surfactant-based precursor solution could be modulated to control the AgBr content. Additionally, components like urea and lactic acid were found to enhance the photocatalytic efficiency of the structures.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY
(2024)
