Review
Polymer Science
Xiaoqing Yuan, Jingxia Li, Lin Luo, Zhenyu Zhong, Xiande Xie
Summary: This study reviewed the mostly investigated polymeric materials for removing Cr(VI), emphasizing the strategies of assembling functional groups, reducing self-aggregation, and enhancing stability and mechanical strength to improve the performance of polymeric adsorbents. The maximum adsorption capacities of these polymers towards Cr(VI) ranged from 3.2 to 1185 mg/g according to the Langmuir isotherm model. Various mechanisms, including complexation, chelation, reduction, electrostatic attraction, anion exchange, and hydrogen bonding, were involved in the removal of Cr(VI). Factors such as pH, initial concentration, temperature, anions, and cations affected the adsorption of Cr(VI) and the regeneration of the adsorbents. The study provides insights for developing more robust polymeric adsorbents and promoting the treatment of Cr(VI)-containing wastewater.
Article
Chemistry, Multidisciplinary
Shaojie Wu, Mingyang Li, Lili Xin, Hongming Long, Xiangpeng Gao
Summary: In this study, an asynchronous cross-linked triethylenetetramine modified sodium alginate (CFTS) was used as a photocatalyst for the simultaneous degradation of Cr(VI) and metronidazole (MNZ) under UV light irradiation. The removal efficiency of Cr(VI) and MNZ reached 99.5% and 100% respectively within a short period of time. The removal mechanisms involve electrostatic adsorption and photocatalytic reduction for Cr(VI), as well as photocatalytic oxidation for MNZ.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Environmental Sciences
Ishfaq Ahmad Lone, Sajad Ur Rehman Beig, Ravi Kumar, Shakeel A. Shah
Summary: The encapsulation and eradication of anions from water is important for production and environmental treatment. A highly functionalized and conjugated microporous porphyrin-based adsorbent material (Co-4MPP) was synthesized, demonstrating efficient adsorption of Cr (VI). The adsorption mechanism involved reduction, chelation, and electrostatic interaction, with protonated nitrogen and oxygen-containing functional groups on the porphyrin ring forming a stable complex with Cr (VI) anions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Rachita Lakra, Manikantan Syamala Kiran, Purna Sai Korrapati
Summary: The study focused on the green synthesis of silver nanoparticles with furfural for the photocatalytic reduction of hexavalent chromium. The efficiency of FAgNPs in reducing Cr(VI) was investigated with varying initial concentration, pH, catalyst dosage, and time. It was observed that FAgNPs showed a reduction efficiency of 9% to 88% at pH 2 under UV illumination.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Minzhang Li, Qikun Hu, Haiquan Shan, Wenjian Yu, Zong-Xiang Xu
Summary: The combination of CuPc and N-CuMe2Pc with rGO to form CuPc/rGO and N-CuMe2Pc/rGO nanocomposites significantly improves the removal efficiency of Cr(VI), with N-CuMe2Pc/rGO exhibiting higher specific surface area, higher light harvesting, higher conductivity, and more negative lowest unoccupied molecular orbital level.
Article
Polymer Science
Aijun Deng, Shaojie Wu, Junjie Hao, Hongbo Pan, Mingyang Li, Xiangpeng Gao
Summary: Heavy metal pollution, especially chromium contamination, is a significant problem in water treatment. Traditional methods for treating chromium-containing wastewater have limitations in terms of complexity and secondary pollution. Therefore, finding efficient and fast processing methods is crucial. In this study, a novel composite gel (T-BSA) was synthesized by modifying sodium alginate with thiourea and mixed with biochar. The T-BSA gel showed promising results in removing 99.98% of Cr(VI) from aqueous solutions through synergistic adsorption and photocatalytic reduction under UV light irradiation. The study also analyzed the mechanism behind the removal process and demonstrated that polysaccharide-derived materials can serve as efficient photocatalysts for wastewater treatment.
Article
Green & Sustainable Science & Technology
Ainara Valverde, David Payno, Luis Lezama, Jose M. Laza, Stefan Wuttke, Roberto Fernandez de Luis
Summary: This study explores the opportunities and effects of multivariate functionalization of UiO-66 for photocatalytic water remediation. By developing a multivariate material, a dual sorbent/photocatalyst with excellent properties is successfully created. This work represents a milestone for the development of an emerging class of reticular materials.
ADVANCED SUSTAINABLE SYSTEMS
(2022)
Article
Chemistry, Physical
Shaojie Wu, Mingyang Li, Lili Xin, Hongming Long, Xiangpeng Gao
Summary: A polysaccharide-derived composite was prepared by embedding carbonized chitosan into triethylenetetramine modified sodium alginate for the removal of hexavalent chromium. The composite exhibited high adsorption capacity and photocatalytic activity, effectively removing hexavalent chromium under UV light irradiation.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Environmental Sciences
Yitao Zhao, Le Li, Yuanjie Zuo, Guangyu He, Qun Chen, Qi Meng, Haiqun Chen
Summary: This study aims to optimize the conformation of nanocomposite for enhancing the photocatalytic removal of heavy metal contaminants, with ZnO/CdS6:5/RGO(6) showing strong recycling performance.
Article
Chemistry, Multidisciplinary
Ya-Qi Zhang, Lin Hou, Hao-Xue Bi, Xiao-Xue Fang, Yuan-Yuan Ma, Zhan-Gang Han
Summary: Visible-light-driven photocatalytic reduction of Cr(VI) using three hourglass-type phosphomolybdate-based hybrids has been studied, showing superior activity compared to inorganic {Zn[P4Mo6](2)} clusters alone. The organic components in the hybrids play a significant role in affecting visible-light absorption and recombination of photogenerated carriers, ultimately enhancing the photocatalytic performances towards Cr(VI) reduction.
CHEMISTRY-AN ASIAN JOURNAL
(2021)
Article
Chemistry, Physical
Jiyong Zhang, Wentao Zhang, Fei Yuan, Zhenrui Yang, Jinhui Lin, Yi Huang, Minggang Ding
Summary: The Bi-doped ZnAl layered double hydroxides composites showed high removal efficiency for Cr(VI) through adsorption and photocatalytic reduction, with the potential to effectively convert harmful Cr(VI) to safe Cr(III) in water systems. The optimal removal ability was achieved with 3% Bi doping and a Bi5O7I/ZnAlBi-CLDHs ratio of 1/10, demonstrating a promising approach for water security.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Yiran Sun, Fei Yu, Liqing Li, Jie Ma
Summary: The study introduces a flexible one-pot approach to synthesize amino-functional graphene sponge adsorbents for eliminating Hexavalent Chromium in aqueous environment, which showed outstanding adsorption capacity and reduction efficiency. The novel adsorbents have great potential in treating chromium containing wastewater.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Analytical
Shubham Roy, Souravi Bardhan, Dhananjoy Mondal, Ishita Saha, Jhilik Roy, Solanky Das, Dipak Kr. Chanda, Parimal Karmakar, Sukhen Das
Summary: The handheld fluorometric probe 'Kavach' is designed for monitoring hexavalent chromium in industrial wastewater and living systems. It utilizes carbon dot decorated boehmite nanostructure for rapid and sensitive detection of chromium contamination. The probe shows excellent selectivity and stability in different pH and water qualities, making it a potential sensing tool for on-site low-cost detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Applied
Feiyan Liu, Xuandi Lai, Shengliang Zhao, Zhiyang Lu, Peigang Han, Liqiong Chen
Summary: A simple and rapid fluorescent method based on gold nanoclusters (AuNCs) was developed for the determination of Cr6+. The method exhibited good sensitivity and selectivity, and showed favorable recovery and accuracy in actual samples.
Article
Engineering, Environmental
Siyu Zhang, Changhao Li, Changdong Ke, Sijia Liu, Qian Yao, Weilin Huang, Zhi Dang, Chuling Guo
Summary: Photosensitized biohybrid system (PBS) allows bacteria to utilize light energy harvested by semiconductors for efficient pollutants transformation, showing great potential in water reclamation. Establishing a biocompatible environment during photocatalytic reactions is crucial for the development of PBS-based treatment technologies. Supplying extracellular polymeric substances (EPS) fractions is found to enhance bacterial viability under adverse conditions, improving the performance of PBS for environmental remediation.
Article
Materials Science, Ceramics
Konstantinos Dimitriadis, Konstantinos C. Vasilopoulos, Tiverios C. Vaimakis, Michael A. Karakassides, Dilshat U. Tulyaganov, Simeon Agathopoulos
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2020)
Article
Biochemistry & Molecular Biology
Nikolaos Chalmpes, Konstantinos Spyrou, Konstantinos C. Vasilopoulos, Athanasios B. Bourlinos, Dimitrios Moschovas, Apostolos Avgeropoulos, Christina Gioti, Michael A. Karakassides, Dimitrios Gournis
Article
Engineering, Environmental
Georgios Asimakopoulos, Maria Baikousi, Constantinos Salmas, Athanasios B. Bourlinos, Radek Zboril, Michael A. Karakassides
Summary: This research investigates the use of activated carbon derived from Posidonia oceanica for the removal of Cr(VI) from wastewater. The activated carbon exhibited high specific surface area and pore volume, with a significant portion allocated to micro-pores. Batch experiments showed the material's excellent sorption properties and high adsorption capacity, with a maximum uptake capacity of 120 mg/g. Kinetic modeling revealed that the Diffusion-Chemisorption model best described the adsorption process.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
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, Multidisciplinary
Nikolaos Chalmpes, Athanasios B. Bourlinos, Smita Talande, Aristides Bakandritsos, Dimitrios Moschovas, Apostolos Avgeropoulos, Michael A. Karakassides, Dimitrios Gournis
Summary: Hypergolics are two substances that ignite spontaneously upon contact without external aid, allowing for rapid and spontaneous formation of carbon at ambient conditions. This new method is recognized as a radically new methodology towards carbon materials synthesis.
Article
Engineering, Chemical
Constantinos E. Salmas, Aris E. Giannakas, Maria Baikousi, Areti Leontiou, Zoe Siasou, Michael A. Karakassides
Summary: This study aims to develop a fully biodegradable active packaging film by utilizing essential basil oil extract, improving the mechanical, antioxidant, and barrier properties of Poly(L-Lactic Acid)/Chitosan films. By modifying the chitosan with basil oil and incorporating it into the Poly(L-Lactic Acid) matrix, advanced food packaging properties were achieved, particularly with the PLLA/CS/BO5 and PLLA/CS/BO10 films showing the most promising potential for active packaging applications.
Article
Engineering, Chemical
Vasileios Tzitzios, Vishnu Pillai, Christina Gioti, Marios Katsiotis, Thomas Karagiannis, Dimitrios Gournis, Michael A. Karakassides, Saeed Alhassan
Summary: Nanostructured transition metal phosphides have attracted increasing scientific interest for their unique physicochemical properties. Nickel phosphide nanoparticles with controllable crystal structures have been synthesized via a novel liquid-phase approach, showing monodispersity and controllable size in the sub-10 nm regime when decorating the surface of r-GO. The critical role of tertiary amine in the phosphidation process and the potential of r-GO as an ideal alternative support material have been demonstrated.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Biochemistry & Molecular Biology
Nikolaos Chalmpes, Dimitrios Moschovas, Iosif Tantis, Athanasios B. Bourlinos, Aristides Bakandritsos, Renia Fotiadou, Michaela Patila, Haralambos Stamatis, Apostolos Avgeropoulos, Michael A. Karakassides, Dimitrios Gournis
Summary: Hypergolic systems rely on organic fuel and a powerful oxidizer that spontaneously ignite upon contact, providing a new method for the synthesis of carbon nanostructures. The use of polyaniline and fuming nitric acid as a hypergolic pair results in the formation of carbon nanosheets with strong Tyndall effect upon liquid-phase exfoliation, showing potential for various conductive polymer-based applications including rocket bipropellants.
Article
Materials Science, Ceramics
Konstantinos Dimitriadis, Dilshat U. Tulyaganov, Konstantinos C. Vasilopoulos, Michael A. Karakassides, Simeon Agathopoulos
Summary: Novel glasses in the CaO-MgO-SiO2 system with Na2O, P2O5, and CaF2 additives were produced, and the influence of K2O and MgO on glass structure, thermal properties, and properties related to biomedicine was investigated. The glasses showed tendencies towards 3-dimensional crystallization, exhibited bioactivity in SBF testing, and had positive machinability parameters.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Chemistry, Multidisciplinary
Nikolaos Chalmpes, Georgios Asimakopoulos, Maria Baikousi, Constantinos E. Salmas, Dimitrios Moschovas, Apostolos Avgeropoulos, Athanasios B. Bourlinos, Iosif Tantis, Aristides Bakandritsos, Dimitrios Gournis, Michael A. Karakassides
Summary: This study proposes a method to convert wood pencils into carbon materials, which can be used for decolorization, making pocket warmers or gunpowder, and serving as an excellent adsorbent for Cr(VI) removal. By heating the wood pencils in a microwave oven, the graphite core is carbonized, resulting in different properties of carbon materials.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Inorganic & Nuclear
Mohamed M. Elsenety, Andreas Kaltzoglou, Ioannis Koutselas, Vassilis Psycharis, Catherine P. Raptopoulou, Athanassios G. Kontos, Kyriaki G. Papadokostaki, Nektarios K. Nasikas, Polycarpos Falaras
Summary: In this study, we synthesized a novel compound of trimethylsulfonium tin trichloride and investigated its crystal structure, optoelectronic properties, vibrational properties, and theoretical calculations. The compound showed air stability and was prepared by reacting solid precursors of (CH3)(3)SCl and SnCl2. The crystal structure analysis revealed that it crystallizes in the orthorhombic space group Pbca with isolated pyramids of [SnCl3](-) and (CH3)(3)S+ units. UV-vis reflectance and photoluminescence spectroscopy showed a direct energy band gap and broadband luminescence. DFT calculations provided insight into the physical properties, while multitemperature Raman spectroscopy revealed a reversible phase transition. Oxidation of the compound in dimethylformamide resulted in the formation of a defect perovskite structure.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Panagiotis M. Angelopoulos, Nikolaos Rafael Vrithias, Zacharias Viskadourakis, Petros Tsakiridis, Konstantinos C. Vasilopoulos, Antonis Peppas, Georgios Asimakopoulos, Anastasia Spyrou, Michael A. Karakassides, Maria Taxiarchou, George Kenanakis
Summary: The use of amorphous microspheres as filler in composites is promising due to their light weight, low cost, incombustibility, and the ability to alter relevant properties of the final composite. We report the use of perlite microspheres for the preparation of composites and composite filaments, as well as their use for sample printing. The produced composites were characterized and evaluated in terms of physical, thermal, and mechanical properties.
Article
Polymer Science
Alexandros Ch. Lazanas, Athanasios Katsouras, Michael Spanos, Gkreti-Maria Manesi, Ioannis Moutsios, Dmitry V. V. Vashurkin, Dimitrios Moschovas, Christina Gioti, Michail A. A. Karakassides, Vasilis G. G. Gregoriou, Dimitri A. A. Ivanov, Christos L. L. Chochos, Apostolos Avgeropoulos
Summary: This study reports the preparation of hybrid materials based on reduced graphene oxide (rGO) and conjugated copolymers. By tuning the number and arrangement of thiophenes in the main chain and the nature of the polymer acceptor, semiconducting copolymers were synthesized and characterized. The study indicates the potential of these hybrid materials for applications related to organic solar cells.
Editorial Material
Chemistry, Physical
Ioannis V. V. Yentekakis, Dimitrios P. P. Gournis, Michael A. A. Karakassides
Proceedings Paper
Materials Science, Multidisciplinary
Panagiotis M. Angelopoulos, George Kenanakis, Zacharias Viskadourakis, P. Tsakiridis, Konstantinos C. Vasilopoulos, Michael A. Karakassides, Maria Taxiarchou
Summary: This study investigates the use of expanded perlite microspheres as filler for the production of ABS composite filament through extrusion procedure and the use of the composite filament for printing dog bone samples on a commercial 3D printer. The results show that fine expanded perlite grades are suitable for the extrusion procedure, and acceptable quality dog bone samples can be printed with a filament content in filler below 20%.
MATERIALS TODAY-PROCEEDINGS
(2022)
