Article
Chemistry, Applied
Zhentao Hu, Nan Lu, Fei Wang, Yingjiao Ma, Hanxue Sun, Zhaoqi Zhu, Weidong Liang, An Li
Summary: The facile preparation of conjugated microporous polymer hollow spheres (CMPs-HSs) with high thermal stability and antibacterial properties was achieved, and further improvement in antibacterial performance was demonstrated through doping silver nanoparticles onto the CMPs-HSs (CMPs@Ag-HSs). These novel porous materials show great potential for organic pollution elimination, water treatment, and antibacterial applications.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Environmental Sciences
Xinxin Gao, Baosheng Liu, Xudong Zhao
Summary: In this study, a novel metal-organic framework (MOF) adsorbent, Zr-MSA-MA, was developed using thiol-containing mercaptoacetic acid (MA) as the template. The Zr-MSA-MA showed a high adsorption capacity for Hg2+ (714.8 mg g-1) and fast adsorption kinetics, surpassing other MOF-based adsorbents. The presence of co-existing metal ions and pH had minimal interference on the adsorption behavior. The adsorption mechanism was proven to be an endothermic reaction, and the adsorbent could be regenerated through simple elution.
Article
Energy & Fuels
Qihuang Huo, Yahui Wang, Huijun Chen, Yu Feng, Lina Han, Wei Xie, Jiancheng Wang, Weiren Bao, Liping Chang, Kechang Xie
Summary: A novel sulfur hybrid mercury sorbent was successfully prepared by chemically activating high inorganic sulfur coal using potassium hydroxide, which showed excellent mercury removal performance at high temperatures, high specific surface area, and adsorption capacity, as well as good resistance to various gases.
Article
Chemistry, Multidisciplinary
Chiara Amicucci, Cristiano D'Andrea, Marella de Angelis, Martina Banchelli, Roberto Pini, Paolo Matteini
Summary: This paper introduces a graphene paper-supported plasmonic substrate for biodetection, which provides stable SERS signals at sub-millimolar concentration and a detection limit down to the nanogram level in the case of hemoglobin. The presence of a graphene underlayer ensures an even surface distribution of SERS hotspots and improved stability of the SERS signal.
Article
Chemistry, Physical
Yufeng Li, Yangyang Yan, Jie Wang, Lidong Li, Fu Tang
Summary: In this study, rod-like silver nanoparticles were successfully prepared in mesoporous silica nanoparticles by a simple method, with tunable optical properties. The resulting gelatin-mixed hydrogel exhibited efficient antibacterial properties due to excellent photothermal performance.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Analytical
Abdulkadir Tanimu, Shehzada Muhammad Sajid Jillani, Saheed A. Ganiyu, Shakhawat Chowdhury, Khalid Alhooshani
Summary: This study focused on the extraction and analysis of twelve different CHCs in wastewater using a new set of sorbents. The sorbents were characterized and extraction parameters were optimized, resulting in a wide linear range and high determination coefficient. The method showed high detection sensitivity and recovery rates, making it suitable for wastewater sample analysis.
MICROCHEMICAL JOURNAL
(2021)
Article
Engineering, Environmental
Lingxiu Shi, Huili Yuan, Feijie Wu, Haian Xia, Wei Jiang, Can Yang, Gengshen Hu, Yuejuan Wang, Maohong Fan
Summary: The study demonstrates the facile preparation of dry amine CO2 sorbents through a cost-effective and environmentally friendly pathway. Results show that the TEPA/SiO2 sorbents exhibit excellent CO2 capture performance, with the 50TEPA/SiO2 sorbent showing higher CO2 uptake and lower mass transfer resistance. Due to their low cost and ease of preparation, dry amine sorbents may have potential applications for urgent situations such as SO2 or H2S leaks.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Shirin Safaei, Hossein Kazemian, Peter C. Junk
Summary: Zn-2(BDC)(2)(TzTz)(2) is a Zn(II) based metal organic framework with a strong mercury chelating site, serving as an effective sorbent towards mercury ions with rapid response and colorimetric capability.
JOURNAL OF SOLID STATE CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Aleksandra Strach, Mateusz Dulski, Daniel Wasilkowski, Oliwia Metryka, Anna Nowak, Krzysztof Matus, Karolina Dudek, Patrycja Rawicka, Jerzy Kubacki, Natalia Waloszczyk, Agnieszka Mrozik, Sylwia Golba
Summary: Heavy metals and organic pollutants are not effectively removed or neutralized in the environment. Porous, spherical silica nanostructures with an active surface and open porosity have great potential for development. In this study, the surface of silica spheres was modified using a microwave field to enhance metal uptake potential. The modified carriers exhibited increased toxicity against bacteria and affected their antioxidant defense system, with the most significant effects observed for carriers treated for an extended period in a microwave field.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Hassan S. Al Qahtani, Sultan Akhtar, Mir Waqas Alam, Mohammad Kamal Hossain, Abbad Al Baroot, Muidh Alheshibri
Summary: This study reports the synthesis of Au-decorated MCM-41 mesoporous nanoparticles using a laser-ablation technique. The number of Au attached to MCM-41 nanostructures was dependent on the amount of encapsulated Cationic surfactant. The chemical group and surface morphology of the prepared nanoparticles were analyzed and evaluated by FT-IR spectroscopy and TEM techniques. Raman spectroscopy showed that the prepared Au NPs facilitated strong Raman peaks and eight distinct Raman peaks were observed in the presence of Au NPs. This functionalized method using laser-ablation approach for mesoporous nanoparticles is of great importance in various applications.
Article
Chemistry, Multidisciplinary
Rajashri B. Jundale, Atul H. Bari, Amol A. Kulkarni
Summary: In this study, a heterogeneous nucleation and growth model is developed to investigate the formation mechanism of silver-deposited silica core-shell particles. Experimental data are quantitatively examined and in situ rates of reduction, nucleation, and growth are estimated by optimizing reactant and deposited silver particle concentrations. The model is used to predict changes in surface area and diameter of the core-shell particles. The study demonstrates that the process parameters can be tuned to control the morphology and surface coverage of the deposited silver particles while maintaining the spherical shape of the core.
Article
Chemistry, Applied
Wenli Zhao, You Fu, Yue Chen, Jiao Sun, Qin Tang, Bohong Jiang, Huihui Kong, Fan Xu, Qingmin Ji
Summary: Controllable doping of iron in hollow porous silica spheres with highly homogeneous distribution state was successfully achieved by a one-pot hydrothermal synthesis strategy. The Fe-doped silica hollow spheres exhibited enhanced catalysis performance as a heterogeneous Fenton catalyst due to sufficient exposed active sites and fast mass transport. This work presents an effective strategy for chemical doping of metal components in silica structures and may be explored for other supported metal catalyst systems.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Ayesha Rahman, Atikur Rahman
Summary: Materials with hydrophobic and visible-light-driven photolytic properties have wide applications. We synthesized hybrid nanoparticles by decorating ultrasmall silver oxide nanoparticles onto the surface of superhydrophobic silica nanoparticles, which showed strong photolytic activity in the presence of visible light and superhydrophobic behavior on various substrates. These nanoparticles have potential for pollutant removal and can be used for self-cleaning and water-oil separation.
ACS APPLIED NANO MATERIALS
(2022)
Article
Pharmacology & Pharmacy
Gozde Ultav, Hayrettin Tonbul, Emine Salva
Summary: In this study, folic acid-conjugated silica nanoparticles were successfully developed as an effective gene delivery system. The conjugation of folic acid increased the cellular uptake and gene silencing efficiency of the nanoparticles.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Shahid Ali, Muhammad Mansha, Nadeem Baig, Safyan Akram Khan
Summary: This study reported the synthesis and characterization of pyrene-functionalized silica nanoparticles for the selective detection of mercury ions in seawater samples. The chemosensor showed high selectivity towards mercury ions and a low detection limit, making it a promising tool for mercury ion detection in marine environments.
Article
Chemistry, Applied
Lubomir Djerahov, Penka Vasileva, Irina Karadjova, Rama Mohan Kurakalva, Keshav Krishna Aradhi
CARBOHYDRATE POLYMERS
(2016)
Review
Chemistry, Analytical
I. Karadjova, I. Dakova, T. Yordanova, P. Vasileva
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2016)
Article
Chemistry, Analytical
Mariya Mitreva, Ivanka Dakova, Irina Karadjova
MICROCHEMICAL JOURNAL
(2017)
Article
Chemistry, Multidisciplinary
Penka Vasileva, Teodora Alexandrova, Irina Karadjova
JOURNAL OF CHEMISTRY
(2017)
Article
Chemistry, Multidisciplinary
Penka Vasileva, Ivanka Dakova, Tanya Yordanova, Irina Karadjova
Article
Chemistry, Analytical
Tanya Yordanova, Penka Vasileva, Irina Karadjova
Summary: A novel non-chromatographic approach for speciation analysis of mercury was developed using silver and gold nanocomposites as sorbents for solid phase extraction. Excellent separation and enrichment of Hg(II) and CH3Hg+ was achieved due to the specific behavior and affinity of the nanocomposite materials.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Biochemistry & Molecular Biology
Penka Vasileva, Lubomir Djerahov, Irina Karadjova
Summary: A new method for selective determination of Cr(VI) in water samples at pH 4 using raffinose capped silver nanoparticles (Ag/Raff NPs) has been developed. The method shows linear calibration curve, low limit of quantification, and good selectivity towards Cr(VI) species.
Article
Multidisciplinary Sciences
Boyan Peychev, Penka Vasileva
Summary: A novel solution-solid synthesis method using a starch matrix has been developed for preparation of ZnO and Au/ZnO composite nanocrystals. The nanocomposite samples with different gold content have been synthesized and studied for various properties, including photocatalytic activity. The porosity of nanocomposites is strongly influenced by modification with gold nanocrystals, affecting the specific surface area.
Article
Polymer Science
Ivanka Dakova, Penka Vasileva, Irina Karadjova
Summary: In this research, Novel Cr(III)-imprinted poly(vinyl alcohol)/sodium alginate/AuNPs hydrogel membranes were synthesized and applied for chromium speciation in waters. The study showed quantitative retention of Cr(III) within 20 hours, with less than 5% adsorption of Cr(VI). A simple and sensitive analytical procedure was developed for monitoring Cr species in aquatic environments.
Proceedings Paper
Nanoscience & Nanotechnology
Penka Vasileva, Stefan Dobrev, Irina Karadjova
INTERNATIONAL CONFERENCE ON QUANTUM, NONLINEAR, AND NANOPHOTONICS 2019 (ICQNN 2019)
(2019)
Proceedings Paper
Nanoscience & Nanotechnology
Ivanka Dakova, Tanya Yordanova, Irina Karadjova
INTERNATIONAL CONFERENCE ON QUANTUM, NONLINEAR, AND NANOPHOTONICS 2019 (ICQNN 2019)
(2019)
Proceedings Paper
Nanoscience & Nanotechnology
Krum V. Bardarov, Ivan Buchvarov, Tanya Yordanova, Peter A. Georgiev
INTERNATIONAL CONFERENCE ON QUANTUM, NONLINEAR, AND NANOPHOTONICS 2019 (ICQNN 2019)
(2019)