Review
Chemistry, Physical
Daniel Attila Karajz, Imre Miklos Szilagyi
Summary: This article reviews the possibilities of photocatalytically active ZnO nanomaterials synthesized using atomic layer deposition (ALD). ZnO, a widely researched photocatalytic material, is influenced by factors such as structure and morphology. The discussion includes the structural possibilities and the incorporation of other materials (such as elements, metals, or semiconductors) to form composite materials, such as ZnO/TiO2 heterostructures, polymer fibers, carbon nanomaterials (e.g. carbon nanotubes or graphene-oxide), and biomaterials.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Analytical
Chengming Lou, Chen Yang, Wei Zheng, Xianghong Liu, Jun Zhang
Summary: A highly sensitive and selective gas sensor for detecting formaldehyde was reported in this study, based on SnO2/ZnO hetemspheres designed by atomic layer deposition (ALD). The ZnO ALD significantly improved sensor properties such as higher responses, faster response-recovery dynamics and better selectivity. The study demonstrates the promising potential of ALD surface engineering for designing new materials for reliable detection of harmful molecules.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Vepa Rozyyev, Julia G. Murphy, Edward Barry, Anil U. Mane, S. J. Sibener, Jeffrey W. Elam
Summary: ALD metal oxide layers were surface modified with vapor-phase (3-aminopropyl)triethoxysilane (APTES) at different temperatures, showing uniform monolayer silane formation through various measurement techniques. Higher surface density of grafted APTES species was observed at lower temperature due to temperature-dependent reactivity of the surface hydroxyls. APTES reacted with Al2O3 and ZnO exclusively through metal siloxy bond formation, while with TiO2 through both siloxy bond formation and ammonium salt formation.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
P. Birnal, M. C. Marco de Lucas, I. Pochard, F. Herbst, O. Heintz, L. Saviot, B. Domenichini, L. Imhoff
Summary: TiO2-Au composite planar films and inverse opals were synthesized using ALD, showing excellent photocatalytic performance. The results highlight the potential of ALD in the field of photocatalysis.
APPLIED SURFACE SCIENCE
(2023)
Article
Optics
J. A. Jurado-Gonzalez, E. G. Lizarraga-Medina, J. Vazquez, O. Romo, J. Lopez, O. E. Contreras-Lopez, N. Nedev, H. Marquez, H. Tiznado
Summary: The refractive index is crucial in waveguides as it determines key parameters such as propagation modes and losses. TiO2 is an interesting material with a high refractive index (>2) and low cost. By creating oxygen vacancies, the refractive index of TiO2 can be further increased (>2.4). However, the increase in oxygen vacancy content may lead to high absorption of light (>50%), which requires exploring the limits of light propagation. In this study, TiO2-x films were fabricated using ALD, and the limits of its application as a waveguide were investigated.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Tzu-Kang Chin, Ming-Wei Liao, Tsong-Pyng Perng
Summary: A new hierarchical fiber structure composed of TiOxN1-x and TiN@nitrogen-doped carbon hollow fibers was formed by direct nitridation of a TiO2-coated polysulfone (PSF) hollow fiber. X-ray photoelectron spectrometric and Raman spectroscopic analysis indicated that the nitridation of TiO2 and carbonization of PSF proceeded independently and simultaneously, resulting in highly conductive fibers.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Optics
S. S. Fouad, B. Parditka, M. Nabil, E. Baradacs, S. Negm, H. E. Atyia, Z. Erdelyi
Summary: The optical properties of ZnO/TiO2 bilayer films were studied, revealing a decrease in optical energy gap and direct optical transition with increasing bilayer numbers. A relationship between linear refractive index and optical energy gap was proposed for predicting material properties.
Article
Chemistry, Physical
Ales Omerzu, Robert Peter, Daria Jardas, Iztok Turel, Kresimir Salamon, Matejka Podlogar, Damjan Vengust, Ivana Jelovica Badovinac, Ivna Kavre Piltaver, Mladen Petravic
Summary: The study demonstrated a significant enhancement in the photocatalytic activity of thin ZnO films grown by PE-ALD method compared to those grown by the thermal ALD method. Various structural and optical experimental techniques were employed to analyze the physical origin of this difference.
SURFACES AND INTERFACES
(2021)
Article
Crystallography
Vladimir Ciobanu, Veaceslav V. Ursaki, Sebastian Lehmann, Tudor Braniste, Simion Raevschi, Victor V. Zalamai, Eduard V. Monaico, Pascal Colpo, Kornelius Nielsch, Ion M. Tiginyanu
Summary: New aeromaterials are proposed in this paper, which are based on titania thin films deposited using atomic layer deposition (ALD) on a sacrificial network of ZnO microtetrapods. The morphology, composition, and crystal structure of the aeromaterials are investigated depending on the temperature of annealing and the sequence of the technological steps. Photoluminescence analysis suggests that these aeromaterials have potential for photocatalytic applications.
Article
Chemistry, Physical
Ben Chen, Jin Zhang, Jing Yu, Rui Wang, Beibei He, Jun Jin, Huanwen Wang, Yansheng Gong
Summary: A specific Z-scheme TiO2-x/Cu/ZnO heterojunction was constructed successfully by ALD technique and spray pyrolysis technology, enhancing visible light absorption capacity and separation efficiency of photogenerated carriers, leading to significantly improved photocatalytic hydrogen production performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Chemical
Kang-Hee Park, Peng-Fei Sun, Eun Heui Kang, Gwon Deok Han, Beom Joon Kim, Yongsun Jang, Sang-Hoon Lee, Joon Hyung Shim, Hee-Deung Park
Summary: A highly photocatalytic active thin ZnO film was immobilized on the surface of a nanoporous ceramic membrane using atomic layer deposition, showing excellent anti-biofouling efficacy under UV-A light irradiation. However, increasing UV-A irradiation intensity led to membrane pore constriction and decreased water flux.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Physical
Junlei Wang, Xueqin Wang, Qihui Chen, Helong Xu, Man Dai, Mei Zhang, Wenyi Wang, Hua Song
Summary: The microstructure of photocatalysts, such as hollow TiO2 spheres synthesized using RF polymer resin, plays a vital role in enhancing photocatalytic performance. Adjusting the concentration of ammonia during synthesis affects the micromorphology and photocatalytic properties of the TiO2 spheres. The high conductivity and surface area of the hollow TiO2 spheres contribute to their efficient photocatalytic performance in phenol decomposition.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Environmental
Mu Liu, Xiaolei Bao, Fahao Ma, Minrui Wang, Liren Zheng, Zeyan Wang, Peng Wang, Yuanyuan Liu, Hefeng Cheng, Ying Dai, Yuchen Fan, Zhaoke Zheng, Baibiao Huang
Summary: The use of supercycle ALD technology has led to superior performance and stability for the TiO2@Cu system during CO2 reduction reaction, which was previously unattainable by traditional post-deposition TiO2 methods. This study has demonstrated a promising approach for enhancing the potential of ALD technique in the field of photocatalysis.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Chia-Hsun Hsu, Ka-Te Chen, Ling-Yan Lin, Wan-Yu Wu, Lu-Sheng Liang, Peng Gao, Yu Qiu, Xiao-Ying Zhang, Pao-Hsun Huang, Shui-Yang Lien, Wen-Zhang Zhu
Summary: Tantalum-doped titanium oxide thin films grown by plasma enhanced atomic layer deposition show reduced crystallinity, lower resistivity, and improved performance as electron transport layer in perovskite solar cells compared to undoped films. The presence of tantalum introduces oxygen vacancies defects and shifts the valance band position, beneficial for band alignment engineering in solar cell applications.
Article
Engineering, Chemical
Jeanne Casetta, Danae Gonzalez Ortiz, Celine Pochat-Bohatier, Mikhael Bechelany, Philippe Miele
Summary: By depositing titanium dioxide (TiO2) on polysulfone hollow fiber (HF) membranes via atomic layer deposition (ALD), the hydrophilicity and fouling resistance of the PSF HF membranes were improved, leading to increased water permeability and reduced pore size.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Physical
Mate Nafradi, Tuende Alapi, Luca Farkas, Gabor Bencsik, Gabor Kozma, Klara Hernadi
Summary: This study compares the efficiency of commercially available photocatalysts, TiO2 and ZnO, in the removal of antibiotics under specific wavelength irradiation. The formation rate of (OH)-O-center dot and the contribution of photogenerated electrons to conversion were compared. The results show that TiO2 has higher efficiency in the removal of antibiotics, while ZnO performs better in certain cases.
Article
Biochemistry & Molecular Biology
Peter M. Rafailov, Peter K. Sveshtarov, Vladimir B. Mehandzhiev, Ivalina Avramova, Penka Terziyska, Minko Petrov, Boyko Katranchev, Haritun Naradikian, Stefan Boyadjiev, Csaba Cserhati, Zoltan Erdelyi, Imre M. Szilagyi
Summary: Graphene films grown by chemical vapor deposition on copper foil were characterized, and the interaction with the copper substrate and its oxidation behavior were studied.
Article
Chemistry, Multidisciplinary
Marcell Bohus, Thong Le Ba, Klara Hernadi, Gyula Grof, Zoltan Konya, Zoltan Erdelyi, Bence Parditka, Tamas Igricz, Imre Miklos Szilagyi
Summary: This paper presents a study on the thermal conductivity and viscosity of nanofluids containing novel atomic layer deposition surface-modified carbon nanosphere and carbon nanopowder core-shell nanocomposites. The results show that the ALD-CNS can significantly enhance the thermal conductivity of nanofluids without the need for surfactants.
Article
Chemistry, Multidisciplinary
Zalan Istvan Varady, Thong Le Ba, Bence Parditka, Zoltan Erdelyi, Klara Hernadi, Gabor Karacs, Gyula Grof, Imre Miklos Szilagyi
Summary: The current research focuses on using surface-modified SiO2 nanoparticles and atomic layer deposition (ALD) to obtain a thin layer of TiO2 coating. The study examines the rheological properties and thermal conductivity of the nanofluids through particle characterization, zeta potential measurement, and analysis using a rotation viscosimeter and thermal conductivity analyzer.
Article
Chemistry, Applied
Nikita Sharma, Kata Saszet, Tamas Szabo, Daniel Karajz, Imre Miklos Szilagyi, Seema Garg, Zsolt Pap, Klara Hernadi
Summary: The use of plant extracts in photocatalysis for the removal of phenol under visible light has been explored. The plant extracts act as structural and shape-tailoring agents, leading to improved performance of the bismuth oxyhalides. BiOI with Azadirachta indica and BiOBr with Camellia sinensis extract show high phenol removal efficiency. The role of organics from the plant extracts and their correlation with the structural and optical properties are discussed.
Article
Chemistry, Physical
Nikola Biliskov, Igor Milanovic, Milos Milovic, Viktor Takats, Zoltan Erdelyi
Summary: In this work, an all-solid ball milling method is used to introduce defects and hybridize them through binding of ammonia borane to the defect sites of MX2. The treated MX2 material exhibits improved electrocatalytic performance for hydrogen evolution reaction, making it potentially applicable for energy conversion and storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Mohammed Alktranee, Mohammed Ahmed Shehab, Zoltan Nemeth, Peter Bencs, Klara Hernadi
Summary: This study investigates the use of a novel TiO2-CuO hybrid nanofluid to reduce the temperature of PV cells, thus improving the energy and efficiency of PVT systems. The experiment shows that the hybrid nanofluid can reduce the temperature of the PV module by 39% and improve the electrical power and overall efficiency by 77.5% and 58.2% respectively, at a concentration of 0.3 vol%. The study also demonstrates the positive effects of the hybrid nanofluid cooling on the system's entropy generation and economic analysis.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Viktoria Marta, Zsolt Pap, Eniko Bardos, Tamas Gyulavari, Gabor Vereb, Klara Hernadi
Summary: Bismuth oxybromides with varying urea amounts were synthesized through a solvothermal method. The influence of urea ratio on the morpho-structural properties and photocatalytic activity of the samples was investigated. Characterization techniques such as X-ray diffraction, diffuse reflectance spectroscopy, infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, and surface tension measurements were employed. The urea ratio had a significant effect on the morphology, particle size distribution, and photoactivity of the samples, but a limited effect on the crystalline composition, primary crystallite size, and band gap of bismuth oxybromides. The formation of Bi-based complexes and degraded urea-based products were found to influence the band gap energies and, consequently, the photoactivity. Samples prepared at low urea ratios exhibited the highest degradation efficiency for both rhodamine B and ibuprofen under both UV and visible light irradiations.
Article
Chemistry, Multidisciplinary
Hamsasew Hankebo Lemago, Feras Shugaa Addin, Daniel Atilla Karajz, Tamas Igricz, Bence Parditka, Zoltan Erdelyi, Dora Hessz, Imre Miklos Szilagyi
Summary: This study successfully deposited TiO2 IO and ultra-thin films of Al2O3 on a polystyrene opal template using thermal or plasma-assisted ALD and vertical layer deposition. The photocatalytic activity results showed that the thermal ALD-grown Al2O3 film has higher photocatalytic activity.
Article
Materials Science, Multidisciplinary
Dhiyaa A. Hussein Al-Timimi, Qusay F. Alsalhy, Adnan A. AbdulRazak, Mohammed Ahmed Shehab, Zoltan Nemeth, Klara Hernadi
Summary: This study aims to optimize operating parameters of mixed matrix membranes (MMMs) fabricated from polyethersulfone (PES) and silica nanoparticles (SiO2 NPs) or modified silica NPs with polyethylenimine (PEI) (SiO2-g-PEI NPs) for pharmaceutical wastewater treatment. The results showed that SiO2 MMMs had a permeate flux of 38.27 LMH and 81.26% MBV rejection, while SiO2-g-PEI MMMs had a permeate flux of 104.11 LMH and 99.00% MBV rejection. The optimal parameters for SiO2 MMMs were SiO2 wt % of 0.8447%, MBV concentration of 98.18 ppm, and pH of 4, while the optimal parameters for SiO2-g-PEI MMMs were SiO2-g-PEI wt% of 0.93%, MBV concentration of 22.7 ppm, and pH of 4.79.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Biochemistry & Molecular Biology
Laura Fekete, Akos Ferenc Fazekas, Cecilia Hodur, Zsuzsanna Laszlo, Aron Agoston, Laszlo Janovak, Tamas Gyulavari, Zsolt Pap, Klara Hernadi, Gabor Vereb
Summary: Membrane filtration is an effective technique for separating micro- and nano-sized oil droplets from oil-contaminated waters. The flux reduction is a challenge for its extensive application, thus the development of antifouling membranes is necessary. The modification of PVDF membranes with TiO2/CNT nanocomposites (2% CNT) showed the highest reduction in filtration resistance and the highest fluxes compared to unmodified membranes, resulting in improved flux recovery ratio and purification efficiency.
Article
Biochemistry & Molecular Biology
Raghad M. Al-Maliki, Qusay F. Alsalhy, Sama Al-Jubouri, Adnan A. AbdulRazak, Mohammed Ahmed Shehab, Zoltan Nemeth, Klara Hernadi, Hasan Sh. Majdi
Summary: In this study, tungsten oxide and graphene oxide (GO-WO2.89) were combined using the ultra-sonication method and embedded with polyphenylsulfone (PPSU) to prepare low-fouling membranes for ultrafiltration. The modified PPSU membrane with 0.1 wt.% GO-WO2.89 exhibited the best characteristics, including a contact angle of 40.82 degrees and a porosity of 92.94%. It also had the highest permeation flux and BSA rejection rate. Additionally, the GO-WO2.89 composite showed positive antibacterial performance at different concentrations.
Article
Chemistry, Physical
Mahitha Udayakumar, Nikita Sharma, Klara Hernadi, Matjaz Finsgar, Blaz Likozar, Kocserha Istvan, Mate Lesko, Daniel Attila Karajz, Imre Miklos Szilagyi, Zoltan Nemeth
Summary: Multicomponent nanocomposites of bismuth oxychloride (BiOCl) with porous carbon foam (CF) derived from waste polyurethane (PU) elastomers were prepared by a simple hydrothermal method and their photocatalytic performance was investigated. The composites exhibited excellent photocatalytic activity for the degradation of methylene blue (MB) under UV-A irradiation, with a high overall removal efficiency of 99.0% in 100 min of irradiation. The enhanced activity of the composites was attributed to the well-connected heterojunction interface, improved hydrophilicity, more reactive sites, and effective separation of photogenerated charges.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Article
Energy & Fuels
Mohammed Alktranee, Mohammed Ahmed Shehab, Zoltan Nemeth, Peter Bencs, Klara Hernadi
Summary: Recently, the use of nanofluids as coolants for photovoltaic modules has gained attention due to the ability to enhance the performance of the modules. This study investigates the use of zirconium oxide nanofluid at different volume concentrations as a coolant for reducing the temperature of photovoltaic cells. The results show that using zirconium oxide nanofluid at a volume concentration of 0.0275% in deionized water effectively reduces the temperature of the PV module and improves system energy and exergy efficiency.
Article
Multidisciplinary Sciences
Kadhum M. Shabeeb, Wallaa A. Noori, Ali A. Abdulridha, Hasan Sh Majdi, Mohammad N. Al-Baiati, Ali A. Yahya, Khalid T. Rashid, Zoltan Nemeth, Klara Hernadi, Qusay F. Alsalhy
Summary: A newly developed water-soluble polymeric nano-additive called PCLNPG has been used as a pore former to modify a polyethersulfone ultrafiltration membrane for dye removal. The study found that the content of PCLNPG in the membrane affected its surface characteristics, morphological structure, and overall performance. Increasing the PCLNPG content improved the hydrophilicity and porosity of the membrane. Additionally, the increased porosity of the membrane was the main reason for the reduced contact angle. The prepared membrane with 3% PCLNPG showed significantly improved water flux and dye rejection, making it a potential option for treating textile wastewater.
