Article
Environmental Sciences
Guy Didier Fanou, Mamadou Traore, Benjamin Kouassi Yao, Andrei Kanaev, Khay Chhor
Summary: A new composite photocatalyst was developed by grafting size-selected 5-nm titanium-oxo-alkoxo nanoparticles onto P25-TiO2 nanoparticles and incorporating HAP obtained by co-precipitation of salts. The photocatalytic yield was increased for the composite photocatalysts with the addition of HAP, likely due to a synergy between adsorption and photo-oxidation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Fangliang Li, Yuemiao Lai, Yi Zeng, Xiao Chen, Tao Wang, Xueming Yang, Qing Guo
Summary: Researchers have successfully obtained highly selective ethene from a model rutile surface using photocatalytic oxidative dehydrogenation of ethane (ODHE) at a high temperature. Ethane reacts with hole-trapped oxidized titanium centers to produce ethyl radicals, which then spontaneously dehydrogenate into ethene. Some of the radicals also rebound with surface sites to produce other products. This study not only advances our understanding of C-H bond activation and low temperature ethane conversion, but also provides new possibilities for achieving high efficiency ODHE under mild conditions.
Article
Chemistry, Physical
Elim Albiter, Jose M. Barrera-Andrade, Lina A. Calzada, Jesus Garcia-Valdes, Miguel A. Valenzuela, Elizabeth Rojas-Garcia
Summary: In this study, reduced graphene oxide-TiO2 composites were prepared by synthesizing graphene oxide and in situ photoreduction. The composites exhibited higher photocatalytic activity than TiO2, which can be attributed to the chemical interaction between graphene oxide and TiO2, leading to faster electron transfer and lower charge recombination rates.
Article
Chemistry, Applied
Marianna Bellardita, Guillermo Escolano-Casado, Leonardo Palmisano, Lorenzo Mino
Summary: Aryl aldehydes and acids are important industrial intermediates, but their synthesis often requires high temperatures and harmful solvents and oxidant agents. Heterogeneous photocatalysis using TiO2 P25 as photocatalyst in water provides a promising and environmentally friendly method for the selective oxidation of alcohols to aldehydes and acids. The selectivity of the reaction depends on the stability and adsorption of the alcohol and its products on the photocatalyst surface.
Article
Chemistry, Applied
Yi Liu, Wenjing Zhu, Xiao Yu, Hongyan Liu, Zenghui Zhang, Mei Zhang, Jinbo Zhao, Yacong Wang, Chengcai Xia
Summary: A method for synthesizing dihydropyrazoles has been developed, featuring mild reaction conditions and good functional group tolerance.
ADVANCED SYNTHESIS & CATALYSIS
(2022)
Article
Chemistry, Applied
Laura Collado, Miguel Garcia-Tecedor, Miguel Gomez-Mendoza, Alejandro H. Pizarro, Freddy E. Oropeza, Marta Liras, Victor A. de la Pena O'Shea
Summary: Among different TiO2 polymorphs, anatase has been more studied than rutile in photocatalytic CO2 reduction. In this work, the catalytic activity of anatase and P25-TiO2 (a mixture of anatase and rutile phases) in gas-phase CO2 photoreduction is evaluated. The interfacial heterojunction between anatase and rutile in P25 leads to a superior photocatalytic activity. The differences in catalytic performance are investigated using various optoelectronic and electrochemical characterization techniques. Our results show that the higher CO2 reduction activity of P25 is attributed to enhanced charge separation at the anatase/rutile interface and more favorable band energy positions for CO2 reaction products.
Article
Materials Science, Ceramics
Lev Matoh, Bostjan Zener, Marin Kovacic, Hrvoje Kusic, Iztok Arcon, Marjetka Levstek, Urska Lavrencic Stangar
Summary: This study explored the effect of different water matrices on the photocatalytic degradation of dissolved pharmaceuticals. The degradation efficiencies in wastewater effluent and water effluent were compared with deionized water. The results showed that even in the presence of other organic molecules, the compounds could still be removed from the water, although at a slower rate. Understanding the effects of different wastewater compositions on photocatalytic reactions can help refine the potential applications of this technology.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Zengkun Li, Haiyan He, Xuan Wang, Chunhui Shou, Mianji Huang, Shengli Jin, Xin Du
Summary: In this work, a SiO2 @TiO2 composite nanocoating with mechanical robustness, antireflection and photocatalytic self-cleaning properties was successfully fabricated by introducing commercial Degussa P25-type titania nanoparticles (P25) and acid-catalyzed silica sol (ACSS) via a simple dip-coating strategy without any post-treatment. The optimized nanocoating exhibits high transmittance, low reflectivity, good hydrophilicity, high photocatalytic activity, and high mechanical robustness.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Electrical & Electronic
Jun-Li Chen, Shi-Yu Xie, Li-Juan Yue, Fei-Long Gong, Yong-Hui Zhang
Summary: This study successfully enhanced the efficiency of photocatalytic hydrogen production by synthesizing a composite of Cu2O and TiO2, mainly due to the formation of a p-n heterojunction that effectively separated the electron hole pairs and improved the charge transfer rate of the materials. In addition, this method effectively utilized the synergistic effect of visible light and ultraviolet light.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Engineering, Environmental
Oswaldo Nun, Duangthip Sattayamuk, Tinnakorn Saelee, Hiromi Yamashita, Yasutaka Kuwahara, Kohsuke Mori, Piyasan Praserthdam, Supareak Praserthdam
Summary: The study investigates the photoreduction mechanism of P25 CO2 and HCO3- in water, showing the stability of HCO3-TiO2 adduct and reaction kinetics under different conditions. By sonication loading the rutile phase, the methane production rate and selectivity are significantly increased, indicating charge separation and redirection of electrons and holes for enhanced catalytic performance.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Xian Liu, Xiaoya Li, Lei Zhu, Xun Wang
Summary: The research shows that MI-Ag-TiO2 prepared by one-step molecular imprinting method has excellent photocatalytic performance, with high degradation efficiency for ethyl paraben, and higher selectivity compared to other catalysts.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Guru Karthikeyan Thirunavukkarasu, Jana Bacova, Olivier Monfort, Ewa Dworniczek, Emil Paluch, Muhammad Bilal Hanif, Sajid Rauf, Monika Motlochova, Jan Capek, Karol Hensel, Gustav Plesch, Grzegorz Chodaczek, Tomas Rousar, Martin Motola
Summary: This study compared two TiO2 nanopowders in terms of toxicity, photoinduced antimicrobial and antibiofilm properties, and photocatalytic activity. TiAP showed higher efficiency in photocatalysis and bacterial inactivation compared to P25.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Zhen Chen, Haixin Chen, Kun Wang, Jian Chen, Ming Li, Yi Wang, Panagiotis Tsiakaras, Shuqin Song
Summary: The hydrophobicity and O2 accessibility of TiO2 photocatalyst can be regulated by the stearic acid (SA) modification. The formation of ester bond between SA molecules and TiO2 surface leads to enhanced hydrophobicity. This modification increases the O2 concentration in the interfacial microenvironment, resulting in improved 2e- ORR activity.
Article
Chemistry, Physical
Zhen Chen, Haixin Chen, Kun Wang, Jian Chen, Ming Li, Yi Wang, Panagiotis Tsiakaras, Shuqin Song
Summary: A simple method was designed to regulate the hydrophobicity and O-2 accessibility of TiO2 photocatalyst by facile stearic acid (SA) modification. It was found that the formation of stable ester bond between SA molecules and TiO2 surface enhanced the hydrophobicity. The highest photocatalytic H2O2 production rate from 2e(-) ORR on SA-modified TiO2 was 3160 mu M h(-1) g(-1),which is 1.69 times that of the corresponding pure TiO2 sample. The increase of O-2 concentration in the interfacial microenvironment due to SA modification is responsible for the enhancement of 2e(-) ORR activity.
Article
Engineering, Environmental
Joao Gomes, Melina Roccamante, Sandra Contreras, Francesc Medina, Isabel Oller, Rui C. Martins
Summary: The application of photocatalysis, single, catalytic and photocatalytic ozonation in treating a mixture of insecticides showed that the reactor's diameter has a significant impact on process performance, and the variation in tube diameter greatly affects the required amount of catalyst.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
K. Selvakumar, A. Raja, M. Arunpandian, P. Rajasekaran, M. Swaminathan
Summary: The study successfully synthesized a natural hematite ore incorporated ZnO composite material (FOZ) using hydrothermal method, and characterized it through a series of methods. FOZ showed excellent photocatalytic performance under visible light, exhibiting good degradation efficiency towards ciprofloxacin and methylene blue, with outstanding recyclability even after multiple cycles of photocatalytic reaction.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Avulu Vinod Kumar, Mari Annadhasan, Vuppu Vinay Pradeep, Mane Jyothi, K. V. Jovan Jose, Rajadurai Chandrasekar
Summary: Experiments have shown that crystal growth can be precisely controlled with laser light of specific wavelengths, allowing for pausing, resuming, and reversing of growth processes. These laser-triggered rare effects have implications for controlling the aggregation processes artificially in biological molecules and materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Multidisciplinary
Jada Ravi, Mari Annadhasan, Avulu Vinod Kumar, Rajadurai Chandrasekar
Summary: This study demonstrates the fabrication of microscale organic photonic integrated circuits from two electronically different flexible crystals using a mechanophotonics approach. Mechanical micromanipulation of the crystals with atomic force cantilever tip results in reconfigurable geometries, including three mu-OPICs. These circuits operate through passive- and active-waveguiding mechanisms, depending on the crystal's electronic nature, providing direction-specific optical outputs.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Jada Ravi, Avulu Vinod Kumar, Durga Prasad Karothu, Mari Annadhasan, Pance Naumov, Rajadurai Chandrasekar
Summary: This study describes the construction of silicon-free, all-organic photonic integrated circuits by micromanipulation of two mechanically different organic crystals with complementary optical properties. The results show the infinite structural variations in optical microstructures that can be achieved using organic crystals, highlighting the untapped potential for lightweight all-organic optical minicircuitry with deformable light-transducive crystals.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Carlos Tardio, Vuppu Vinay Pradeep, Raul Martin, Ana M. Rodriguez, Antonio Hoz, Ravi Jada, Mari Annadhasan, Pilar Prieto, Rajadurai Chandrasekar
Summary: This study successfully synthesized ultrapure needle-shaped crystals via ambient pressure chemical vapour deposition, revealing their supramolecular structure and optical waveguiding tendency due to anisotropic molecular arrangements.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Jada Ravi, Avulu Vinod Kumar, Mari Annadhasan, Rajadurai Chandrasekar
Summary: Photon-based data communication technologies provide safe and efficient data transfer. However, conventional silicon-based photonic circuits have drawbacks such as mechanical rigidity. In this study, a flexible organic photonic integrated circuit (FOPIC) is fabricated using mechanically compliant and optically dissimilar organic crystals, enabling precise control of output light at different angles. The circuit allows selective routing of six bandwidth-engineered signals in 2D, utilizing active/passive light-guiding principles and energy-transfer mechanisms. This reconfigurable photonic circuit concept is advantageous for programmable circuits, navigable detectors, and intelligent sensors.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
T. M. Usha Mary, M. Swaminathan
Summary: The biodegradation of thiocyanate by free and immobilized Bacillus brevis was studied. It was found that immobilized cells had a higher rate of thiocyanate degradation. Cells on lignite carbon matrix showed higher efficiency compared to cells on alginate beads. Immobilization increased the bacteria's tolerance to the toxic chemical. Immobilized Bacillus brevis on lignite carbon achieved degradation of 100 ppm thiocyanate in 20 hours. This technique is valuable for wastewater treatment due to its reduced cost and simplicity.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Ramesh Sivasamy, Katherine Paredes-Gil, Jerald Vijay Ramaclus, Edgar Mosquera, Selvam Kaliyamoorthy, Khalid Mujasam Batoo
Summary: This paper provides a systematic understanding of the sandwich-like GaN/MoSe2/GaN heterostructure nanosheet and explores its geometrical structures and electronic, optical, and thermodynamical properties. The results show that the heterostructure exhibits good optical characteristics and stability, making it suitable for applications in photovoltaic, photocatalytic, and optical devices.
SURFACES AND INTERFACES
(2022)
Article
Chemistry, Analytical
Bo-Tau Liu, Dillirani Nagarajan, Selvam Kaliyamoorthy, Balamurugan Rathinam
Summary: Ciprofloxacin (CIP), a commonly used antibiotic, poses potential risks to humans and the environment. In order to monitor CIP in environmental samples conveniently and effectively, researchers have designed a fluorescent receptor based on a zirconium-based metal organic framework. The synthesized receptor shows promising fluorescence detection capabilities for CIP.
Article
Biotechnology & Applied Microbiology
S. Balasubramaniyan, T. M. Usha Mary, M. Swaminathan
Summary: Quinoline-containing effluent from pharmaceuticals, dyes and pesticide industries pollutes the environment and affects human health due to its toxicity and nauseating odor. Biotreatment using isolated Bacillus subtilis immobilized on activated coconut shell carbon proves to be an effective method for degrading quinoline, even at high concentrations of 300 ppm, within a shorter time period compared to free cells. The stability and recyclability of immobilized cells make them suitable for the mineralization of heterocyclic organics in wastewater.
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
(2023)
Review
Engineering, Chemical
Balamurugan Rathinam, Bo-Tau Liu, Dillirani Nagarajan, Selvam Kaliyamoorthy
Summary: This paper categorizes and analyzes the performance of tin ion probes, discussing problems, challenges, and future research directions.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Chemistry, Inorganic & Nuclear
Murugavelu Marimuthu, Balachander Ramalingam, Balachandran Subramanian, Wei Song, Selvam Kaliyamoorthy
Summary: In this study, Ag-Au/SiO2 bimetal nanocomposites were used as a novel heterogeneous catalyst for microwave-assisted stereoselective synthesis of beta-amino carbonyl in Mannich reaction. The nanocomposites were prepared by loading Ag-Au bimetal nanoparticles smaller than 30 nm onto SiO2 nanospheres via a modified Stober method. The catalyst was characterized by various techniques and found to have good performance in terms of yield, reaction time, and reusability.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Chemistry, Inorganic & Nuclear
Krishnakumar Balu, Selvam Kaliyamoorthy, Mani Durai, Antonio Aguiar, Margarida C. M. Sobral, I. Muthuvel, Sakthivel Kumaravel, Balakrishna Avula, Abilio J. F. N. Sobral, Young-Ho Ahn
Summary: Materials based on semiconducting oxides are widely used in catalysis, photocatalysis, and other fields. Zinc oxide (ZnO), with its catalytic and optoelectronic capabilities, is utilized in various industries. Porphyrins, biomimetic molecules, can be modified to synthesize derivatives with remarkable optoelectronic properties. The combination of porphyrins and ZnO can lead to the development of hybrid materials with enhanced optical, electronic, and chemical properties. This review aims to present the evolution of ZnO/porphyrin hybrids and future research trends in this field.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
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)
Article
Chemistry, Multidisciplinary
Debasish Barman, Mari Annadhasan, Rajadurai Chandrasekar, Parameswar Krishnan Iyer
Summary: In this study, through-space donor-alkyl bridge-acceptor luminogens were developed as new organic single-molecule white light emitters. The white light emission was achieved through multiple higher lying singlet and triplet states, and exhibited characteristics of delayed fluorescence and phosphorescence color mixing. Crystal structure analysis revealed that the alkyl chain length greatly influenced the solid-state optical properties. Additionally, the microrod crystals of these emitters demonstrated waveguiding abilities to propagate phosphorescence.
Article
Chemistry, Organic
Dilek Isik Tasgin, Irem Bayraktar
Summary: We present a synthetic method for pyrrolizine-3-one derivatives and investigate their photophysical properties. These compounds are prepared through a series of reactions involving substituted pyrroles in one-pot, two-step oxidation, and intramolecular cyclization processes. The photophysical properties of the synthesized compounds are studied using UV-Vis and fluorescence spectroscopy in various solvents. The introduction of pyrrolyl substituents has a significant impact on Stokes shifts and quantum yield values.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Satish Kumar Burra, Vaikunta Rao Lakinani, Raghunadh Akula, Chiranjeevi Yankkanti
Summary: A novel and green strategy for the construction of biologically relevant substituted indolyl-4H-chromenes scaffolds is reported, using L-proline as a catalyst and water as a promoter solvent. This catalytic system offers wider applicability, shorter reaction times, and high yields, making it an ideal condition for green chemistry.
SYNTHETIC COMMUNICATIONS
(2024)
Review
Chemistry, Organic
Abouelhaoul El Alami, Amine El Maraghi, Fatima Youssoufi, Assiya Atif, Hamid Sdassi
Summary: Nitrobenzimidazoles have become increasingly important in the design of new compounds in medicinal, therapeutic and chemical fields. This review provides an overview of the synthesis strategies and biological activities of nitrobenzimidazole derivatives.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Nilesh Raghunath Khedkar, Alex Joseph, Milind Sindkhedkar
Summary: In this study, a new library of 3-(2-(pyrimidin-5-yl)thiazol-4-yl)-1,2,4-oxadiazole compounds was designed and synthesized as potential anticancer agents using in silico fragment-based drug design. The compounds were tested for their anticancer activity in vitro, and one compound exhibited excellent activity against multiple cancer cell lines.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Terungwa H. Iorkula, Bryce A. Tolman, Scott R. Burt, Matt A. Peterson
Summary: A new method for synthesizing C-6 substituted products has been discovered in this study, which utilizes lower doses of fluoride and CsF as a catalyst, with high reaction yields and cost-effectiveness under suitable conditions.
SYNTHETIC COMMUNICATIONS
(2024)
Review
Chemistry, Organic
Ranjana Aggarwal, Swati Sharma
Summary: This review article mainly focuses on the synthesis of 3(5)-trifluoromethylpyrazoles via condensation reaction of trifluoromethyl-beta-diketones with hydrazines. It emphasizes the importance of fluorine-containing compounds and pyrazoles in the field of biology. The literature reported condensation reactions of trifluoromethyl-beta-diketones with hydrazines are covered.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
F. M. Alshareef, Sami A. Al-Harbi, Esam S. Allehyani, Omeima Abdullah, Magdy A. Ibrahim
Summary: This study aimed to construct a novel category of linear annulated chromeno[3',2':5,6]pyrido[2,3-d][1,3]thiazolo[3,2-a]pyrimidines. The chemical reactivity of the synthesized compounds was investigated, and they showed significant antimicrobial activity against various strains.
SYNTHETIC COMMUNICATIONS
(2024)
Article
Chemistry, Organic
Preethi Dhanapal, S. L. Manju
Summary: Thiazole based Schiff base scaffolds have become an integral part of drug development in recent years, playing a versatile role as building blocks for lead drug molecules. This study presents a facile one pot synthetic method for producing novel 4-aryl thiazoles with high yield, shorter reaction time, and milder conditions, without the need for catalysts or purification techniques.
SYNTHETIC COMMUNICATIONS
(2024)
