Article
Engineering, Chemical
Mohd Zafar, Ayushi Aggarwal, Eldon R. Rene, Krzysztof Barbusinski, Biswanath Mahanty, Shishir Kumar Behera
Summary: This study investigates the adsorptive removal of chromium using modified maghemite nanoparticles. Artificial neural network (ANN) and adaptive neuro-fuzzy interference system (ANFIS) modeling approaches were used to quantify the effect of the nanoparticles on chromium removal. The developed ANN model showed excellent fit with the experimental data and outperformed the ANFIS model. The models can be used for online prediction of chromium removal efficiency and detection of operational errors.
Article
Chemistry, Physical
Pedro A. Calderon Bedoya, Pablo M. Botta, Paula G. Bercoff, Maria A. Fanovich
Summary: Iron oxide nanoparticles were successfully prepared via mechanochemical synthesis from three different reactive systems. The study investigated the effects of various iron salts and metallic iron on the properties of the nanoparticles, and determined high magnetization of the obtained iron oxide nanoparticles across a range of temperatures. The presence of metallic iron was found to be crucial in the formation of magnetic phases in the nanoparticles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Biochemistry & Molecular Biology
A. F. P. Allwin Mabes Raj, Maja Bauman, Marijana Lakic, Nena Dimitrusev, Aleksandra Lobnik, Aljosa Kosak
Summary: In this study, a circular economy approach was applied to remove heavy metal ions from aqueous solutions through adsorption and desorption. The amino-functionalized iron oxide magnetic nanoparticles showed high adsorption efficiency and could be reused through nitric acid desorption.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Engineering, Environmental
Natalia S. Freitas, M. Alzamora, D. R. Sanchez, Yordy E. Licea, Jaqueline D. Senra, Nakedia M. F. Carvalho
Summary: In this study, palladium nanoparticles (PdNPs) were synthesized in the presence of glycerol as a green reducing/stabilizing agent, supported on maghemite, for dye removal. The catalysts showed improved catalytic activity with increasing Pd content and PdNPs size distribution. The dye removal process followed pseudo-first-order kinetics and the reaction pH was adjusted to 3, which is optimal for the Fenton process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Hui Wang, Dengjie Zhong, Yunlan Xu, Pengfei Liao
Summary: In this study, phosphoric acid and chitosan were used to modify sludge-based biochar in order to enhance the removal of Cr(vi). The modified CS/SBC-H3PO4 exhibited high Cr(vi) removal efficiency and spontaneous and heat-absorbing adsorption behavior. The maximum adsorption capacity was found to be 201.93 mg g(-1).
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
J. E. Ortega-Valencia, J. Oliva-Ramirez, O. Garcia-Barradas, M. Jimenez-Fernandez, G. H. Rosas-Saito, J. E. Oseguera-Pena, D. V. Melo-Maximo
Summary: This study developed an immunosensor using quartz crystal microbalance (QCM) to detect Salmonella typhimurium, with gold nanoparticles as signal enhancers. The effect of gold nanoparticle size was explored to determine the optimal size for enhancing the detection signal.
Article
Food Science & Technology
Shiqian Fu, Xinyan Yang, Lidong Pang, Shasha Cheng, Danliangmin Song, Xue Qin, Chaoxin Man, Yujun Jiang
Summary: In this study, a novel fluorescence aptasensor was developed for rapid and sensitive detection of Salmonella Typhimurium (S. Typhimurium). The aptasensor exhibited high selectivity and sensitivity, and showed excellent application for detection in artificially contaminated milk.
Article
Engineering, Chemical
Jiahong Wu, Hamza Annath, Haili Chen, Chirangano Mangwandi
Summary: This study developed cost-effective bio-sorbent materials for heavy metal removal from wastewater using locally available tea wastes as precursors. The preparation methods of magnetic/non-magnetic tea waste-based adsorbents were discussed, and their properties were correlated with Cr(VI) adsorption capacity. The bio-sorbents were characterized by various techniques, and the Cr adsorption performance was investigated under different conditions. The tea waste-based bio-sorbents showed high efficiency in removing Cr.
Article
Chemistry, Applied
Farahnaz Bahador, Rauf Foroutan, Hossein Esmaeili, Bahman Ramavandi
Summary: The study investigated the effects of chitosan and Fe3O4 magnetic nanoparticles on the chromium adsorption properties of Moringa oleifera activated carbon. The results showed that the adsorption efficiency was influenced by pH and time, and the adsorption process followed a pseudo-second-order kinetic model. Thermodynamic investigation revealed that the adsorption of chromium was exothermic, and the maximum adsorption capacity was increased by modifying the activated carbon with chitosan and Fe3O4 nanoparticles.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Physical
Hosseinali Hassanzadeh, Amin Salem, Shiva Salem
Summary: The effect of urea ratio on the crystalline structure, magnetic characteristics, and textural properties of maghemite nanoparticles produced through autoignition was investigated. It was found that a fuel ratio of 3.0 is necessary to achieve mesoporous nanoparticles with an average pore diameter of 14 nm. Adjusting the fuel ratio to 5.0 favored the fabrication of relatively pure maghemite nanoparticles with a saturation magnetization of 52 emu g(-1). These nanoparticles had mesopores with a mean size of 33 nm and a surface area of 18.3 m(2) g(-1).
CHEMICAL PHYSICS LETTERS
(2023)
Article
Engineering, Chemical
A. Santhana Krishna Kumar, Jolanta Warchol, Jakub Matusik, Wei-Lung Tseng, N. Rajesh, Tomasz Bajda
Summary: A new lightweight adsorbent has been developed for efficient removal of Cr(VI), As(V), MB, and AO pollutants from water, with good adsorption performance and practical application for detoxification of chromium and arsenic.
Article
Engineering, Environmental
Jiao Du, Xiaoxian Shang, Jingpei Shi, Yueping Guan
Summary: This paper studied a simple and effective method for chromium removal in wastewater using magnetic nanoparticles in a gradient magnetic field. The optimal process conditions were determined, and a PSO-BP model was established to predict chromium adsorption efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Ajay Kumar, Himanshu Joshi, Anil Kumar
Summary: This study investigates the potential of gamma-Fe2O3 nanoparticles to remove As-V from groundwater. The nanoparticles were synthesized using a modified co-precipitation method and their morphological and surface characteristics were analyzed. The study explores the effects of various factors on the removal process and finds that adsorption occurs through electrostatic interactions.
Article
Biophysics
Ritika Gupta, Vishal Singh, Nikita Sarawagi, Gurmeet Kaur, Raminder Kaur, Nitesh Priyadarshi, Vikas Rishi, Bhupesh Goyal, Padmaja P. Mishra, Nitin K. Singhal
Summary: Foodborne diseases have increased due to the consumption of packaged and contaminated food. Aptamer, with its stability, specificity, and sensitivity, has been developed against Salmonella Typhimurium through the Cell-Selex method. Studies have been done to understand the mechanism and applicability of the aptamer in detecting the bacteria. Additionally, Magnetic Graphene oxide has been utilized to separate and ablate the bacteria.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Physical
Waqas Ahmad, Shanif Qaiser, Rahman Ullah, Badrul Mohamed Jan, Michael A. Karakassides, Constantinos E. Salmas, George Kenanakis, Rabia Ikram
Summary: The study successfully synthesized magnetic activated carbon (M-AC) for adsorption of Cr (VI) from wastewater, achieving a high adsorption capacity. The adsorption process was found to be thermodynamically feasible and followed pseudo second order kinetics.
Article
Chemistry, Medicinal
Noora Barzkar, Saeid Tamadoni Jahromi, Fabio Vianello
Summary: Cardiovascular diseases are a significant global health threat, with thrombosis being one of the main causes. Fibrinolytic enzymes from marine microorganisms have potential as thrombolytic agents due to their improved pharmacological properties and fewer side effects.
Article
Chemistry, Physical
Ievgen Obraztsov, Aristides Bakandritsos, Veronika Sedajova, Rostislav Langer, Petr Jakubec, Giorgio Zoppellaro, Martin Pykal, Volker Presser, Michal Otyepka, Radek Zboril
Summary: To achieve more efficient organic metal-ion batteries, environmentally sustainable, low-cost, flexible, and lightweight energy storage technologies require advancement in materials design. A graphene acid derivative with densely carboxylated but conducting properties has been developed to overcome limitations in conductivity and electrolyte leakage associated with organic molecules, resulting in excellent charge transport, redox activity, and lithium intercalation properties at the single-layer level. The graphene acid anode demonstrates a practical capacity and rate capability that exceeds all reported organic anodes, showcasing its true potential in advanced lithium-ion batteries.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Hyo-Jin Ahn, Stepan Kment, Alberto Naldoni, Radek Zboril, Patrik Schmuki
Summary: In this article, a simple ex situ Sn-doping method on hematite nanoflakes (coded as MSnO2-H) is reported, which can protect the nanoflake morphology against high-temperature annealing and activate the photoresponse of hematite up to 800 nm wavelength. SnO2 nanoparticles synthesized on hematite nanoflakes effectively prevent shape deformation and enable heavy Sn ion doping. Moreover, SnO2 nanoparticles act as a passivation layer, reducing the onset potential of hematite for water splitting reactions.
Review
Chemistry, Multidisciplinary
Maomao Xie, Meng Gao, Yang Yun, Martin Malmsten, Vincent M. M. Rotello, Radek Zboril, Omid Akhavan, Aliaksandr Kraskouski, John Amalraj, Xiaoming Cai, Jianmei Lu, Huizhen Zheng, Ruibin Li
Summary: Antimicrobial resistance (AMR) is a major threat to the environment and health, and antimicrobial nanomaterials are being explored as alternatives to conventional antibiotics. Some antimicrobial nanomaterials show AMR-independent antimicrobial effects, while others trigger the evolution of AMR. This review compares the mechanisms and relationships of antibiotics and antimicrobial nanomaterials, examines nano-microbe interactions, and provides an outlook on future antimicrobial nanomaterials.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Robert Prucha, Vitezslav Hruby, Dagmar Zaoralova, Eva Otyepkova, Veronika Sedajova, Jan Kolarik, Radek Zboril, Miroslav Medved', Michal Otyepka
Summary: Anchoring single metal atoms on suitable substrates is a convenient route towards materials with unique electronic and magnetic properties. Cyanographene (GCN), a highly functionalized graphene containing nitrile groups, offers a favorable arrangement for anchoring metal atoms. In this study, density functional theory (DFT) calculations were used to analyze the coordination effects in the binding of late 3d cations to GCN in aqueous solutions. Copper cations were found to be the most tightly bonded to GCN. Coordination effects significantly reduced the binding affinities predicted by implicit solvation models.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Olivier Henrotte, Eva Yazmin Santiago, Artur Movsesyan, Luca Mascaretti, Morteza Afshar, Alessandro Minguzzi, Alberto Vertova, Zhiming M. Wang, Radek Zboril, Stepan Kment, Alexander O. Govorov, Alberto Naldoni
Summary: The investigation of photocatalytic systems at the nanoscale is crucial for understanding their fundamental principles, improving their design, and enhancing their applicability. A photochemical nanoscopy technique has been developed to detect the molecular products of plasmonic hot-carrier-driven photocatalytic reactions with nanometric precision. Applying this methodology to Au/TiO2 plasmonic photocatalysts, it was discovered that smaller and denser Au nanoparticle arrays have lower optical contribution but higher quantum efficiency in hot-hole-driven photocatalysis, which is closely related to population heterogeneity. This study also revealed the areas of oxidation and reduction product evolution in a single plasmonic nanodiode, demonstrating the bipolar behavior of such nanosystems. These findings enable quantitative investigations at the nanoscale to evaluate the photocatalytic reactivity of low-dimensional materials in various chemical reactions.
Review
Chemistry, Multidisciplinary
Iosif Tantis, Smita Talande, Vasileios Tzitzios, Georgia Basina, Vishal Shrivastav, Aristides Bakandritsos, Radek Zboril
Summary: This review focuses on recent advances in electrochemical energy storage (EES) technologies related to 2D crystals originating from non-layered 3D solids (non-van der Waals; nvdW) and their influence on the materials' features. The methods and challenges in top-down and bottom-up strategies towards nvdW 2D sheets and their applications in EES are discussed. Moreover, the opportunities and challenges of nvdW 2D systems in various applications are highlighted.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Tomas Malina, Cordula Hirsch, Alexandra Rippl, David Panacek, Katerina Polakova, Veronika Sedajova, Magdalena Scheibe, Radek Zboril, Peter Wick
Summary: Graphene oxide (GO) is a promising delivery nanoplatform, but its non-specific surface properties and heterogeneity in stability limit its commercial application. Evaluating the interaction of emerging graphene derivatives with endothelial and immune cells is important. The study demonstrated that graphene acid (GA) and cyanographene (GCN) have better biocompatibility and potential for drug/gene delivery compared to GO.
Article
Chemistry, Applied
Giuseppina Pace Pereira Lima, Vladmir Eliodoro Costa, Aline Nunes, Leticia Silva Pereira Basilio, Cristine Vanz Borges, Gean Charles Monteiro, Igor Otavio Minatel, Juliana Celia Denadai, Ricardo Orsi, Fabio Vianello, Marcelo Maraschin
Summary: This study conducted the identification of biogenic amines and some precursor amino acids in 114 honey samples from different regions in Brazil, as well as the detection of honey adulteration through stable isotopes. The results showed the presence of serotonin in all samples, and melatonin in the majority of honey. Higher levels of L-Dopa, dopamine, and histamine were found in honey from certain regions. The stable isotope technique was crucial in detecting adulterated honey.
Article
Engineering, Environmental
Yikai Liu, Simone Molinari, Maria Chiara Dalconi, Luca Valentini, Maurizio Pietro Bellotto, Giorgio Ferrari, Roberto Pellay, Graziano Rilievo, Fabio Vianello, Gabriella Salviulo, Qiusong Chen, Gilberto Artioli
Summary: A geochemical model combined with parametric fitting techniques was used to investigate the solidification/stabilization mechanisms of Pb-rich pyrite ash in ordinary Portland cement and calcium aluminate cement. The study revealed that ettringite and calcium silicate hydrates have strong affinities for Pb under alkaline conditions. When the hydration products are unable to stabilize all the soluble Pb, part of it may be immobilized as Pb(OH)2. Hematite from pyrite ash and newly-formed ferrihydrite, along with anglesite and cerussite precipitation, are the main controlling factors of Pb under acidic and neutral conditions. This work provides valuable insights for the development of more sustainable mixture formulations in solid waste remediation.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Review
Chemistry, Physical
En Zhao, Wenjun Zhang, Lin Dong, Radek Zboril, Zupeng Chen
Summary: Transfer hydrogenation using liquid hydrogen carriersas the direct proton sources under mild conditions has attracted considerable attention in the field of organic synthesis. Photocatalytic water-donating transfer hydrogenation (PWDTH) has emerged as an eco-friendly alternative to conventional hydrogenation technology. This paper discusses recent advances in PWDTH reactions, including the mechanism of hydrogen transfer and the design principles of efficient photocatalysts. It also explores the current challenges and future opportunities in this rapidly developing field.
Article
Biochemistry & Molecular Biology
Graziano Rilievo, Alessandro Cecconello, Nima Fouladi Ghareshiran, Massimiliano Magro, Friedrich C. Simmel, Fabio Vianello
Summary: In recent years, noncoding RNA molecules have been discovered to play a potential role in gene regulation as components of endogenous DNA-RNA hybrid triplexes. These triplexes, which are involved in complex molecular signaling networks, hold the key to engineering biological computing components. In this study, researchers successfully constructed triplex-based molecular gates, including XOR, XNOR, and a threshold gate, through the transcription of a fluorogenic RNA aptamer. These biomolecular-integrated systems demonstrated precise modulation over a wide range of transcriptional outputs, showcasing the potential for developing molecular gates using DNA-RNA triplex nanostructures.
Article
Materials Science, Multidisciplinary
Lukas Zdrazil, David Panacek, Veronika Sedajova, Zdenek Badura, Michal Langer, Miroslav Medved, Marketa Paloncyova, Magdalena Scheibe, Sergii Kalytchuk, Giorgio Zoppellaro, Stepan Kment, Alejandro Cadranel, Aristides Bakandritsos, Dirk M. Guldi, Michal Otyepka, Radek Zboril
Summary: One of the UN Sustainable Development Goals is to ensure universal access to clean drinking water. Mercury (Hg) is considered to be one of the most dangerous water contaminants due to its immense toxicity and vast environmental impact. A nanosensor based on carbon dots (CDs) functionalized with carboxylic groups has been developed to monitor water quality, showing an ultrahigh sensitivity and selectivity in detecting Hg2+ concentration-dependent photoluminescence (PL) lifetimes. The selectivity is explained by significant perturbation of the CD photoexcited state upon Hg2+ binding, supported by light-induced electron paramagnetic resonance (LEPR) spectroscopy and time-dependent density functional theory (TD-DFT) calculations.
ADVANCED OPTICAL MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Virender K. Sharma, Xingmao Ma, Radek Zboril
Summary: Water is a crucial component of the United Nations' sustainable development goals, and water reuse is becoming increasingly accepted in response to global water scarcity. However, traditional treatment processes face challenges in treating low concentrations of pollutants in the presence of other chemicals. Advanced oxidation processes and the use of single atom catalysts offer promising solutions to these challenges.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Gopal Niraula, Denilson Toneto, Gerardo F. Goya, Giorgio Zoppellaro, Jose A. H. Coaquira, Diego Muraca, Juliano C. Denardin, Trevor P. Almeida, Marcelo Knobel, Ahmad I. Ayesh, Surender K. Sharma
Summary: Theoretical and micromagnetic simulation studies suggest that magnetic nanospheres with vortex configurations have technological advantages. However, experimental evidence of magnetic vortex configurations in submicrometer spheres is lacking. In this study, Fe3O4 nanospheres were fabricated through microwave irradiation and their magnetic vortex configuration was established through experimental results, theoretical analysis, and micromagnetic simulations. The study provides crucial information for the synthesis of magnetic nanospheres with magnetically tailored properties.
NANOSCALE ADVANCES
(2023)
