Article
Engineering, Environmental
Spela Slapnicar, Gregor Zerjav, Janez Zavasnik, Matjaz Finsgar, Albin Pintar
Summary: This study investigated the plasmonic Au (1 wt%) catalysts on hydrothermally synthesized TiO2 nanorods. Different sizes of Au nanoparticles (Au NPs) on Au/TiO2 catalysts were obtained by adjusting the mixing duration and calcination parameters. The presence of localized surface plasmon resonance effect was observed in all UV-Vis diffuse reflectance spectra of the catalysts, regardless of the size of Au particles. The study also identified superoxide anion radicals (O2 & BULL;-) as the main reactive oxygen species responsible for the oxidation of bisphenol A (BPA) under visible-light illumination.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Applied
Jin-Feng Liao, Ya-Ting Cai, Jun-Yan Li, Yong Jiang, Xu-Dong Wang, Hong-Yan Chen, Dai-Bin Kuang
Summary: The optoelectronic performance of CsPbBr3 nanocrystal is limited by charge carrier recombination and narrow light absorption range, which can be resolved through coupling with plasmonic Au nanoparticles. The CsPbBr3-Au nanocomposite exhibits excitation-wavelength dependent carrier transfer behavior, leading to improved CO2 photocatalytic reduction activity.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Guangli He, Yunhe Lai, Yanzhen Guo, Hang Yin, Binbin Chang, Man Liu, Shouren Zhang, Baocheng Yang, Jianfang Wang
Summary: This study presents a facile method for synthesizing TiO2-tipped Au nanobipyramids (NBPs) to create (Au NBP)/t-TiO2 nanodumbbells, which exhibit enhanced photocatalytic activity through photo-reduction and photo-oxidation processes. The effect of plasmonic hotspots on the enhancement of photocatalytic activity is confirmed by both experimental and simulation results.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Optics
Xiang Wang, Rinze Benedictus, Roger M. Groves
Summary: In this paper, the spectral peak shift of an optical fiber containing gold nanoparticles under axial strain was analyzed. The research showed that strain could induce peak wavelength shift by nanoparticles, which has the potential to be tuned for highly sensitive strain sensing.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Sophia Selvarajan, Hyunji Shim, Eunjeong Byun, Albert Kim, Seung Hyun Song
Summary: This study presents an acousto-nanodevice that can oxidize redox proteins under ultrasonic irradiation. By using surface-engineered barium titanate (BTO) nanoparticles with a gold half-coating, the nanodevice is capable of modulating the redox proteins and enabling unidirectional electron transfer. This new class of ultrasonically powered nano-sized protein redox agents has the potential to be a highly selective modulator for biological processes with deeper treatment sites.
Article
Nanoscience & Nanotechnology
Yuzhou Pu, Thomas Pons
Summary: Gold nanoparticles, particularly nanorods (AuNRs), have high absorption cross sections in the near-infrared (NIR) range, making them valuable as photosensitizers for cancer treatment. By combining AuNRs with TiO2, the hybrid nanoparticles can generate hydroxyl radicals under NIR irradiation. The photodynamic effect induced by these nanoparticles is more efficient in killing cancer cells than the photothermal effect alone.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Yu Huang, Shengqiang Li, Cuiying Liu, Ligang Chen, Husun Qian, Ho-Pui Ho, Jiangling Wu, Jiang Wu, Xiaoyin Pu
Summary: In this study, a simple, sensitive, and cost-effective sensing strategy for thrombin was developed. The strategy involved the use of polyadenine diblock oligonucleotides anchored on gold nanoparticles (AuNPs) to detect thrombin. Binding of thrombin to its aptamer triggered the disassembly of AuNP aggregates, resulting in a significant signal change. The assay demonstrated a detection limit of 0.81 pM and a dynamic range from 10 pM to 10 nM, and could be performed in diluted serum solutions without sophisticated instruments.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Bin Zhang, Xiaoming Wang, Wei Hu, Yiquan Liao, Yichang He, Bohua Dong, Minggang Zhao, Ye Ma
Summary: This work presents a photo-responsive Au@Fe3O4 nanozyme with excellent peroxidase-like activity based on gold nanoparticles (Au NPs). The hot electrons of Au NPs excited by a surface plasmon resonance (SPR) effect enhance the catalytic activity of Au@Fe3O4 in oxidizing 3,3′,5,5′-tetramethylbenzidine (TMB) and detecting hydroquinone (HQ). The magnetic separation and reusability of the nanozyme further contribute to its cost-effectiveness. The sensor exhibits a detection linear range of 0-30 μM and a lowest detection limit of 0.29 μM. Good recovery rates are achieved in the detection of real water samples, providing promising references for the development of HQ detection technology in seawater.
Article
Nanoscience & Nanotechnology
Han Zhang, Shiu Hei Lam, Yanzhen Guo, Jianhua Yang, Yao Lu, Lei Shao, Baocheng Yang, Lehui Xiao, Jianfang Wang
Summary: Plasmonic hotspots can enhance hot charge carrier generation, offering new opportunities for improving the photo-catalytic activity. In this study, eight types of heteronanostructures were synthesized for the photocatalytic oxidation of o-phenylenediamine, with gold nanocups showing the highest activity. Simulations revealed that the electric field enhancement at the hotspots boosted the hot-carrier density in the catalytic nanoparticles.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Evgeniya D. Novikova, Yuri A. Vorotnikov, Nazar A. Nikolaev, Alphiya R. Tsygankova, Michael A. Shestopalov, Olga A. Efremova
Summary: Photodynamic and photothermal therapies are promising candidates for multimodal anticancer therapies, and combining octahedral molybdenum clusters with plasmonic spherical gold nanoparticles can enhance their photophysical properties synergistically. By careful selection of spacing between the cluster and the gold nanoparticle, significant improvements in luminescence and photosensitizing properties of the cluster were achieved compared to similar gold-free particles. The cluster complex also facilitated energy conversion to heat by gold particles, increasing the heating rate under laser irradiation.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Analytical
Yuanyang Xie, Yu Huang, Jiye Li, Jiangling Wu
Summary: A pH-triggered colorimetric assay using aptamer anchored gold nanoparticles has been developed to detect E. coli O157:H7. The movement of HS-Apt@AuNPs in different solvents triggers different responses due to the pH effect and aptamer's capturing ability, leading to changes in colorimetric signals. This pH-dependent trigger method provides flexibility in design for gold nanoparticle-based biosensing assays, showing great potential for highly sensitive bacterial sensors in public health defense.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Zewei Luo, Ya Xu, Lu He, Fan He, Juan Wu, Zhijun Huang, Yonghui Tian, Yongxin Li, Yixiang Duan
Summary: The study presented a novel LSPR-based cytosensor using Omega-shaped fiber optic with suitable AuNPs coverage, which showed high sensitivity and rapid detection for cancer cells, indicating promising applications in cancer diagnosis.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Materials Science, Multidisciplinary
A. Rivera, Z. Lazcano, A. L. Gonzalez, O. Meza
Summary: This work investigates the plasmon resonances in gold and silver nanoparticles to enhance the luminescent properties of PMMA doped with different rare-earth ion densities. A rate equation model based on the Fo(r)ster theory is used to describe the luminescent dynamics between donor and acceptor rare earth ions and takes into account the electric field changes due to metallic nanoparticles. The results show that the luminescence of rare earth can be increased in the proximity of spherical gold and silver nanoparticles due to changes in the optical field and transition rates.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Nanoscience & Nanotechnology
A. W. Zaibudeen, Ranjini Bandyopadhyay
Summary: In this study, the effects of nanoparticle size, nanoparticle and surfactant concentrations on the drying kinetics and evaporation-induced nanoparticle assemblies in dried deposit patterns of gold nanoparticle (Au-NP) dispersion droplets are investigated. The results show that the drying process, deposit morphology, and plasmonic activity of the deposited Au-NPs can be fine-tuned by varying the CTAB concentration, nanoparticle size, and nanoparticle concentration.
Article
Nanoscience & Nanotechnology
Yan-Ling Liu, Jian Zhu, Guo-Jun Weng, Jian-Jun Li, Jun-Wu Zhao
Summary: This paper investigates the optical properties and local electric field distribution of the transverse plasmon mode of a single pentagonal gold nanotube using the discrete dipole approximation (DDA) for the first time. The study shows that the transverse plasmon peaks can shift nonlinearly from visible to infrared region by controlling the inner diameter, and the number of peaks increases when the tube wall is thin enough. By tuning the inner and outer diameter parameters, selective control over the transverse plasmon spectra of gold nanotube can be achieved, which is significant for the study of optical properties and applications in molecular detection and biological imaging.
Article
Chemistry, Physical
Timea Benko, Shaohua Shen, Miklos Nemeth, Jinzhan Su, Akos Szamosvolgyi, Zoltan Kovacs, Gyorgy Safran, Sahir M. Al-Zuraiji, Endre Zsolt Horvath, Andras Sapi, Zoltan Konya, Jozsef Sandor Pap
Summary: Photoelectrochemical water splitting can be more efficient by grafting co-catalysts on semiconductors. We used a non-noble metal pre-catalyst, [FeII(PBI)(3)](2+), on a nanopyramidal BiVO4 semiconductor to improve its performance and charge transfer efficiency.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Chemistry, Physical
Mohit Yadav, Imre Szenti, Marietta Abel, Akos Szamosvolgyi, Korneli B. Abrahamne, Janos Kiss, Pap Zsolt, Andras Sapi, Akos Kukovecz, Zoltan Konya
Summary: This study successfully synthesized platinum-gallium nanoalloy catalyst via ultrasound-assisted impregnation method, which exhibited excellent catalytic activity and H-2 formation rate in the steam reforming of ethanol reaction. This is attributed to the high interaction between gallium and platinum, resulting in enhanced dehydrogenation and acidic properties, thus increasing the yield of H-2.
Article
Chemistry, Physical
Adel Szerlauth, Zsuzsanna D. Konya, Greta Papp, Zoltan Konya, Akos Kukovecz, Marton Szabados, Gabor Varga, Istvan Szilagyi
Summary: The immobilization of tannic acid (TA) and glutathione (GSH) in layered double hydroxide (LDH) nanoparticles as hosts has been investigated. The molecular orientation of TA and GSH on the surface or among the layers of LDHs was found to strongly affect their radical scavenging activity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Correction
Chemistry, Physical
Owais Al-Aqtash, Ferenc Farkas, Andras Sapi, Imre Szenti, Tamas Boldizsar, Kornelia B. Abrahamne, Akos Kukovecz, Zoltan Konya
REACTION KINETICS MECHANISMS AND CATALYSIS
(2023)
Article
Green & Sustainable Science & Technology
Loghman Rezaei, Samrand Saeidi, Andras Sapi, M. R. Abdollahi Senoukesh, Gyula Grof, Wei-Hsin Chen, Zoltan Konya, Jiri Jaromir Klemes
Summary: The solar chimney power plant is a simple and clean technology to generate electricity from solar radiation. This study developed a novel collector design with hanging metallic tubes to improve efficiency. Experimental and computational fluid dynamics analysis validated the new design and found that the metallic tubes significantly affected temperature and velocity distribution. The efficiency of the collector increased with the hanging metallic tubes and was also influenced by the geometry variation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Materials Science, Ceramics
Tamas Boldizsar, Henrik Bali, Imre Szenti, Imre Sebok-Papp, Zsolt Ban, Sara Herczeg, Gabor Barna, Andras Sapi, Akos Kukovecz, Zoltan Konya
Summary: In this study, lightweight cordierite-mullite ceramics with high strength and high thermal-shock resistance were successfully synthesized using hollow ceramic microspheres. The resulting cordierite material had a low bulk density of 1.40 g/cm3, apparent porosity of 44.78%, flexural strength of 20.17 MPa, and coefficient of thermal expansion of 2.26 x 10-6 oC-1, compared to the bulk counterpart with a bulk density of 2.00 g/cm3, apparent porosity of 25.75%, flexural strength of 23.69 MPa, and coefficient of thermal expansion of 2.47 x 10-6 oC-1. As a catalyst support, the economical cordierite showed the same stability and activity in CO2 hydrogenation towards C5+ fuels as the bulk cordierite-based catalyst counterparts.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Green & Sustainable Science & Technology
Samrand Saeidi, Andras Sapt, Asif Hussain Khoja, Sara Najari, Mariam Ayesha, Zoltan Konya, Bernard Baffour Asare-Bediako, Adam Tatarczuk, Volker Hessel, Frerich J. Keil, Alirio E. Rodrigues
Summary: Fossil fuel depletion, global warming, climate change, and rising fuel prices have prompted scientists to explore hydrogen as a commercial and environmentally friendly energy carrier. Steam methane reforming (SMR) is currently the most effective method for hydrogen production, but it faces challenges such as catalyst deactivation, coking, and CO2 generation. This article comprehensively reviews the influence of catalyst types, kinetic models, and operating conditions on high-yield H-2 production through conventional SMR, discusses intensified techniques for SMR to blue H-2, and proposes a novel and sustainable path for the SMR process to produce turquoise H-2 using new materials and emerging technologies. Additionally, the article discusses the critical points of steam reforming process technology to enhance environmental, social, and governance (ESG) profiling.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Ibolya Zita Papp, Adel Szerlauth, Timea Szucs, Peter Belteky, Juan Fernando Gomez Perez, Zoltan Konya, Akos Kukovecz
Summary: Hybrid thin film sensors based on semiconductor oxides and carbon nanostructures were fabricated and characterized in this study. The hybrid layer, consisting of ZnO nanoparticles, milled multiwalled carbon nanotubes, and conducting polymer, showed enhanced performance in gas sensing tests and as an ultraviolet photodetector. The results suggest the potential usability of this composite in further sensor applications.
Article
Green & Sustainable Science & Technology
Hadid Sukmana, Etelka Tombacz, Gergo Ballai, Gabor Kozma, Zoltan Konya, Cecilia Hodur
Summary: This study compares Indonesian and Hungarian rice husks as bio-adsorbents for removing dyes from aqueous solutions and finds that they are potential adsorbents.
Article
Materials Science, Multidisciplinary
Livia Vasarhelyi, Daniel Sebok, Imre Szenti, Adam Toth, Sara Levay, Robert Vajtai, Zoltan Konya, Akos Kukovecz
Summary: Mixing is a fundamental process in practically every industry, but there is a lack of literature on its 3D analysis. High-resolution computed tomography (micro-CT) is an ideal X-ray imaging tool for investigating the mixing of granular materials. In addition to qualitative analysis, 3D micro-CT images provide an opportunity for quantitative analysis, which is crucial for the efficiency and environmental impact of the mixing process. This study proposes lacunarity as a measure of mixing, which allows for a temporal description of mixing in three dimensions. The lacunarity curve provides additional information about the spatial distribution of grains compared to traditional mixing indices. Discrete element method simulations showed similar results to the experiments.
OXFORD OPEN MATERIALS SCIENCE
(2023)
Article
Biochemical Research Methods
Sanja Mutic, Dalibor Stankovic, Zoltan Konya, Jasmina Anojcic
Summary: A cholesterol biosensor (Naf/ChOx/Pt,Ru-C/IL-CPE) was developed by immobilizing cholesterol oxidase (ChOx) on Pt,Ru-C nanocomposite and an ionic liquid (IL)-modified carbon paste electrode (CPE) using Nafion (R) (Naf). The biosensor showed excellent analytical performance for cholesterol amperometric determination in phosphate buffer solution pH 7.50. Under optimized conditions, the biosensor exhibited a linear relationship between oxidation current and cholesterol concentration, with a detection limit of 0.13 mu M and low relative standard deviation (RSD). The biosensor also demonstrated good repeatability and high selectivity for cholesterol biosensing in human blood serum samples, making it a promising alternative to existing commercial cholesterol tests used in medical practice.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Krisztina Karadi, Thanh-Truc Nguyen, Adel Anna Adam, Kornelia Baan, Andras Sapi, Akos Kukovecz, Zoltan Konya, Pal Sipos, Istvan Palinko, Gabor Varga
Summary: Glucose-to-fructose isomerization is a key process in biomass conversion to fine chemicals. Catalyzing glucose isomerization in ethanol using hydrotalcite has shown promising results. The study reveals the relationship between the structural and textural parameters of hydrotalcites and their catalytic performance, indicating that hydrophilicity and LDH surface factors are the determining factors. A comparable catalytic performance with lower reaction temperature can be achieved using easily recyclable LDH with suitable surface features.
Article
Chemistry, Physical
Marianna Kocsis, Kornelia Baan, Sandor B. Otvos, Akos Kukovecz, Zoltan Konya, Pal Sipos, Istvan Palinko, Gabor Varga
Summary: Oxidative dehydrogenative coupling (ODC) is a versatile and sustainable tool for forming new C-C, C-O, and N=N bonds. However, it is less explored for N-heterocycle synthesis. In this study, we developed an environmentally friendly synthesis strategy to selectively produce azobenzenes, quinolines, and quinoxalines through the ODC of anilines and 2-aminoanilies with vicinal diols. The reactions were catalyzed by bifunctional catalysts based on transition metal oxides/Bi(iii), enabling solvent-, additive-, oxidant-, and base-free cyclizations/couplings. The catalysts showed high robustness and reusability.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mohit Yadav, Tamas Gyulavari, Janos Kiss, Kornelia B. Abrahamne, Anastasiia Efremova, Akos Szamosvolgyi, Zsolt Pap, Andras Sapi, Akos Kukovecz, Zoltan Konya
Summary: The activation and conversion of CO2 can be achieved on multifunctional catalytic sites at the metal/oxide interface by taking advantage of the synergy between noble metal nanoparticles and supports. Sequential deposition of noble metals and nanodiamonds enhances light absorption properties and photocatalytic activity.
JOURNAL OF CO2 UTILIZATION
(2023)
Article
Environmental Sciences
Natasa Slijepcevic, Dunja Radenovic, Jelena Beljin, Gabor Kozma, Zoltan Konya, Snezana Maletic, Dragana Tomasevic Pilipovic
Summary: This study demonstrates the potential of green nano-zero-valent iron supported by native clay and biochar for the simultaneous removal of potentially toxic elements and polycyclic aromatic hydrocarbons from co-contaminated river sediment. It shows promising results in the removal of both organic and inorganic pollutants, with no further impact on the environment.
JOURNAL OF SOILS AND SEDIMENTS
(2023)
