Article
Materials Science, Ceramics
M. Chakraborty, E. S. Kadir, R. N. Gayen
Summary: By varying the graphene oxide (GO) content, the modification of UV photo-response characteristics in transparent titanium dioxide-graphene oxide (TiO2-GO) nanocomposite thin films was studied. The presence of GO improves the optical band gap of TiO2 without affecting its transparency. The fabricated metal-semiconductor (MS) Schottky junctions with TiO2-GO nanocomposite thin films show rectifying behavior and improved UV response characteristics.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Soad Z. Alsheheri, Ahmed Shawky, Wejdan T. Alsaggaf, Z. Zaki
Summary: The accumulation of Cr(VI) ions can have serious impacts on the environment and human health. This study presents a simple synthesis of ZnSe nanoparticles anchored to TiO2 for visible-light-driven photocatalytic reduction of Cr(VI) ions. The introduction of ZnSe enhances the light absorption and significantly improves the photocatalytic activity, while the nanocomposite exhibits good stability.
Article
Polymer Science
Luminita Predoana, Gabriela Petcu, Silviu Preda, Jeanina Pandele-Cusu, Simona Viorica Petrescu, Adriana Baran, Nicoleta G. Apostol, Ruxandra M. Costescu, Vasile-Adrian Surdu, Bogdan Stefan Vasile, Adelina C. Ianculescu
Summary: Using the microwave-assisted sol-gel method, Zn- and Cu-doped TiO2 nanoparticles with an anatase crystalline structure were prepared. The presence of single-phase anatase and dopants in the nanoparticles was confirmed by XRD and XRF analysis. XPS analysis verified the presence of Ti, O, Zn, and Cu on the surface of the nanoparticles. Cu doping was found to enhance the photocatalytic activity of TiO2 in the visible-light range by narrowing the band-gap energy.
Article
Thermodynamics
Akash Oraon, Bhakti Pada Das, Monisha Michael, Tapasendra Adhikary, Purbarun Dhar, Shampa Aich, Sudipto Ghosh
Summary: This study focuses on the thermal conductivity enhancement of silicone oil with increasing mass % of hard magnetic Sm-Co nanoparticles in the presence of external magnetic fields. The results show that the thermal conductivity of Sm-Co nanofluids increases significantly with rising particle concentration and magnetic flux density under the influence of an external magnetic field.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Green & Sustainable Science & Technology
Satya Prakash Pandey, Satish Kumar Singh, Achyut K. Panda, Sandip Mandal, Sachin Kumar
Summary: TiO2 nano particles synthesized through the sol-gel technique were successfully employed for catalytic pyrolysis of Argemone mexicana seed, resulting in increased bio-oil yield and improved product quality. Furthermore, the bio-char also showed potential for further applications.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Chemistry, Applied
Mangesh G. Bhosale, Radhakrishna S. Sutar, Swati S. Londhe, Meghshyam K. Patil
Summary: Ce-doped TiO2 nanoparticles were prepared by the sol-gel method and characterized by various analytical techniques. The study found that increasing the dopant content of cerium in TiO2 improves the properties of the nanoparticles and enhances photocatalytic activity. Furthermore, Ce-doped TiO2 showed efficient degradation of antibacterial agents and mixture of contaminants.
APPLIED ORGANOMETALLIC CHEMISTRY
(2022)
Article
Environmental Sciences
Michelle Navarrete-Magana, Alberto Estrella-Gonzalez, Luis May-Ix, Sandra Cipagauta-Diaz, Ricardo Gomez
Summary: WO3/TiO2 semiconductors synthesized through sol-gel method can efficiently photocatalyze the oxidation of arsenite (As(III)) to arsenate (As(V)), with 3%WO3/TiO2(TW3) showing the highest catalytic efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Polymer Science
Silviu Preda, Jeanina Pandele-Cusu, Simona Viorica Petrescu, Elena Madalina Ciobanu, Gabriela Petcu, Daniela C. Culita, Nicoleta G. Apostol, Ruxandra M. Costescu, Iuliana Raut, Mariana Constantin, Luminita Predoana
Summary: In this study, doped TiO2 nanoparticles were synthesized using a sol-gel process. The samples were characterized by TG/DTA analysis, SEM, and XPS, and were found to possess anatase crystalline structure with the presence of Ti, O, Zn, and Cu. The samples exhibited good antibacterial activity and photocatalytic efficiency for the degradation of methyl orange.
Article
Biotechnology & Applied Microbiology
Saurav Mishra, Nandana Chakinala, Anand G. Chakinala, Praveen K. Surolia
Summary: The photocatalytic performance of TiO2 nanoparticles was improved through bimetallic doping, resulting in significant degradation of the model organic pollutant.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
W. Nachit, H. Ait Ahsaine, Z. Ramzi, S. Touhtouh, I. Goncharova, K. Benkhouja
Summary: TiO2 photocatalysis has wide applications in environmental and energy fields. This paper investigates the degradation of Rhodamine B using TiO2 nanoparticles under UV light. The results show that TiO2 nanoparticles can degrade 95% of RhB dye within 60 minutes under UV light.
Article
Chemistry, Inorganic & Nuclear
Anshu Kumar Singh, Pramod Kumar Vishwakarma, Sumit Kumar Pandey, Raghvendra Pratap, Rajiv Giri, Anchal Srivastava
Summary: Organic pollutants from the textile industries are polluting water resources and posing a threat to aquatic ecosystems. High-performance photocatalysts that can be activated by visible light are needed. TiO2 has been widely studied as a photocatalyst, but its limitations have led researchers to explore modifications. In this study, MWCNTs were used to modify TiO2 and compared for their ability to degrade methylene blue dye under visible light irradiation. The in-situ CNTs-TiO2 nanocomposite showed higher degradation efficiency and stability due to strong chemical interactions with MWCNTs.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Energy & Fuels
Felix Marske, Joe Dasler, Caroline Haupt, Kirsten Bacia, Thomas Hahn, Dirk Enke
Summary: Shape-stabilized phase change materials (ss-PCMs) with high mechanical stability have been synthesized through a novel porogen-assisted solgel process. The influence of surfactants (SDS and PVA) on the properties of ss-PCMs, such as shape stability and chemical stability, has been analyzed. Higher PVA amounts increase the silica macropore width in ss-PCMs but decrease the compressive strength and thermal conductivity, while low SDS amounts result in partially fragmented silica phase and high SDS concentrations cause collapse of macropores during drying, leading to reduced compressive strength and thermal conductivity of ss-PCMs.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Pharmacology & Pharmacy
Oussama Ouerghi, H. Mohammed Geesi, O. Elmutasim Ibnouf, Mohammad Javed Ansari, Pravej Alam, Ammar Elsanousi, Abdellah Kaiba, Yassine Riadi
Summary: The study assessed the antibacterial effects of a conjugate of TiO2 nanoparticles and cardamom essential oil (CEO), which showed stronger activity against bacteria than CEO or TiO2 nanoparticles alone. Spectrophotometry measurements demonstrated the potent antibacterial activity of the conjugate. Confocal microscopy observations were used to explain the mechanism of action of the newly devised antibacterial agent.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Inorganic & Nuclear
Aamir Ahmed, Anoop Singh, Asha Sharma, Prerna, Sonali Verma, Sarika Mahajan, Sandeep Arya
Summary: Recent research interest has been focused on synthesizing nanocomposite-based photoluminescent materials, particularly using lanthanides such as Europium. This study prepared Europium doped Y2O3: TiO2 nanocomposite and characterized its structural, morphological, and optical properties using various techniques. The material exhibited good optical properties and showed potential for applications as a thermographic phosphor and in LED fabrication.
SOLID STATE SCIENCES
(2021)
Article
Biotechnology & Applied Microbiology
Md Rashid Al-Mamun, Md Nafiul Karim, Naufida Afroj Nitun, Shahina Kader, Md Shahinoor Islam, Md Zaved Hossain Khan
Summary: The nanocomposites of TiO2 photocatalyst doped with graphene oxide (GO) and silver (Ag) nanoparticles show higher performance in the removal of organic dyes, with great potential for sustainable management of textile wastewater under solar irradiation. The photocatalytic efficiency is enhanced by the addition of oxidant H2O2, and the time-dependent degradation of dye is best fitted with the experimental data.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Materials Science, Ceramics
Pengfei Liu, Randall E. Youngman, Lars R. Jensen, Morten M. Smedskjaer
Summary: This study investigates the structure and mechanical properties of lithium borophosphate glasses. The addition of boron in the phosphate network increases the network rigidity and enhances properties such as density, hardness, and glass transition temperature. However, it also decreases Poisson's ratio and crack initiation resistance. The presence of trigonal boron units in high-B2O3 glasses significantly affects atomic packing density and Vickers hardness.
INTERNATIONAL JOURNAL OF APPLIED GLASS SCIENCE
(2023)
Article
Chemistry, Physical
Zhimin Chen, Tao Du, Soren S. Sorensen, Rasmus Christensen, Qi Zhang, Lars R. Jensen, Oxana V. Magdysyuk, Maria Diaz-Lopez, Mathieu Bauchy, Yuanzheng Yue, Morten M. Smedskjaer
Summary: This study investigates the structural origins and property variations of lithium borophosphate glass electrolytes using experimental and simulation techniques. The research finds that the fracture toughness and ionic conductivity of the electrolytes are influenced by boron bonding and the lithium-ion migration is affected by medium-range order structure.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Soren S. Sorensen, Xiangting Ren, Tao Du, Ayoub Traverson, Shibo Xi, Lars R. Jensen, Mathieu Bauchy, Satoshi Horike, John Wang, Morten M. Smedskjaer
Summary: This work demonstrates that water can depolymerize polyhedra with labile metal-ligand bonds in a cobalt-based coordination network, resulting in nonstoichiometric glasses. The addition of water molecules promotes the breakage of network bonds and coordination number changes, thereby lowering melting and glass transition temperatures. These structural changes alter the physical and chemical properties of the glass, similar to the concept of modifiers in oxides. This approach can be extended to other transition metal-based coordination networks, enabling diversification of hybrid glass chemistry.
Article
Nanoscience & Nanotechnology
Wei Fan, Lars R. Jensen, Yibing Dong, Abigail J. Deloria, Bengang Xing, Donghong Yu, Morten M. Smedskjaer
Summary: Superior flexibility and toughness can be achieved in bioactive hydrogels by using a double polymer network with complementary properties. In this study, polyacrylic acid (PAA) and sodium alginate (SA) were combined to obtain a dual-reinforced double interpenetrating network (d-DIPN) hydrogel. The reinforcement involved ionic cross-linking and introduction of SiO2 nanoparticles, leading to significant improvements in strength and toughness. Furthermore, the hydrogel exhibited swelling resistance, self-healing behavior, adhesive abilities, and shape memory performance. Despite a reduction in breakage strain and stress, the biocompatibility and bone cell proliferation ability of the hydrogel were improved through a mineralization process. Overall, this work provides a pathway for the design of strong and tough hydrogels with potential applications in biomedicine and tissue engineering.
ACS APPLIED BIO MATERIALS
(2023)
Article
Materials Science, Ceramics
Daming Sun, Qi Zhang, Pengfei Liu, Lars R. Jensen, Deyong Wang, Morten M. Smedskjaer
Summary: This study investigates the effect of crystallization on the mechanical and optical properties of barium titanosilicate glass-ceramics. It is found that crystallization increases the size and content of crystals, leading to improved fracture toughness and hardness but decreased transparency.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Elsebeth J. Pedersen, Theany To, Soren S. Sorensen, Rasmus Christensen, Johan F. S. Christensen, Lars R. Jensen, Michal Bockowski, Oxana V. Magdysyuk, Maria Diaz-Lopez, Yuanzheng Yue, Morten M. Smedskjaer
Summary: Methods to improve the fracture toughness of oxide glasses are needed due to their low fracture toughness being a major limitation for their applications. Investigating the effect of short-and medium-range structural features on fracture toughness is crucial. Recent research has achieved a record-high fracture toughness for a bulk lithium aluminoborate glass through hot compression. This study further explores the structural origin of this high fracture toughness by subjecting different alkali aluminoborate glasses to hot compression, revealing correlations between structural changes and increased fracture toughness.
PHYSICAL REVIEW MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Anisha Chirumamilla, Ioana-Malina Moise, Ziru Cai, Fei Ding, Karina B. Jensen, Deyong Wang, Peter K. Kristensen, Lars R. Jensen, Peter Fojan, Vladimir Popok, Manohar Chirumamilla, Kjeld Pedersen
Summary: Surface-enhanced Raman spectroscopy (SERS) is used to detect analyte molecules at ultra-low concentrations using efficient plasmonic nanostructures. However, large-scale fabrication of such nanostructures with electromagnetic field enhancement remains challenging. This work presents a one-step rapid fabrication technique to grow 3D nanopillars of Ag or Au, which can reliably detect analyte molecules at concentrations as low as 10^-18 M. The technique utilizes localized surface plasmons and surface plasmons at the metal/air interface for high enhancement and is evaluated using a portable handheld Raman spectrometer for potential on-site diagnostics.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Inorganic & Nuclear
Davide Palma, Francesca Deganello, Leonarda Francesca Liotta, Valeria La Parola, Alessandra Bianco Prevot, Mery Malandrino, Enzo Laurenti, Vittorio Boffa, Giuliana Magnacca
Summary: The influence of synthesis and processing parameters on the thermocatalytic performance of Ce-doped SrFeO3 inorganic perovskites was investigated to improve reproducibility and reliability. Analysis revealed that strict control of synthesis parameters is crucial for optimizing the thermocatalytic properties. The best synthesis conditions include full gelification of the sol, an overstoichiometric reducer-to-oxidizer ratio, a nominal cerium content of 15 mol%, pH 6, and thermal treatment at 800 °C/2 h.
Article
Engineering, Chemical
C. Morgante, X. Ma, X. Chen, D. Wang, V. Boffa, V. Stathopoulos, J. Lopez, J. L. Cortina, A. Cipollina, A. Tamburini, G. Micale
Summary: Nanofiltration (NF) plays an increasingly important role in Zero Liquid Discharge (ZLD)/Minimal Liquid Discharge (MLD) systems, improving the efficiency of downstream technologies for recovering valuable minerals from seawater and brines. However, the purity of the recovered minerals often does not meet market specifications, making ZLD/MLD economically unfeasible. In this study, a novel positively charged NF membrane was developed using NH2-MIL-101(Al) and ZnO nanoparticles in a chitosan matrix to enhance magnesium and calcium selectivity.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Martin Bonderup Ostergaard, Andreas Veis, Francesca Deganello, Vittorio Boffa, Mads Koustrup Jorgensen
Summary: The limited access to clean water is due to an increasing amount of persistent organic pollutants (POPs), which cannot be completely removed by current methods. Therefore, new treatment technologies for surface water and wastewater are required. This study combines membrane filtration and thermocatalytic chemical oxidation of POPs into one step, using a perovskite-type catalyst incorporated into an alumina membrane. The results demonstrate the great potential of thermocatalytic membranes for continuous membrane filtration and simultaneous degradation of POPs.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Martin B. Ostergaard, Francesca Deganello, Valeria La Parola, Leonarda F. Liotta, Vittorio Boffa, Mads K. Jorgensen
Summary: Ce-doped SrFeO3 perovskite-type compounds are effective thermocatalysts for degrade wastewater contaminants. The effects of cerium excess on the properties and thermocatalytic activity of Sr0.86Ce0.14FeO3-CeO2 perovskite-oxide systems were investigated. The introduction of a larger cerium excess enhances the perovskite performance, and the oxygen mobility and reducibility contribute to the superior thermocatalytic properties of these perovskite oxide-based systems.
Article
Materials Science, Ceramics
Louise Belmonte, Mette Solvang, Yuanzheng Yue
Summary: Mineral wool, particularly stone wool, is an essential thermal insulation material for saving energy and preventing fire spread in buildings. This study developed a universal method to accurately quantify its high-temperature stability on a small scale, by measuring the silhouette area variation of a cylindrical wool fiber pellet during heating. Two main stages of shrinking were detected, and the key to ensuring the fire barrier role of stone wool lies in minimizing the first stage shrinking.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Zhitao Shan, Tongyao Zhao, Xuefei Ke, Jinjun Ren, Haizheng Tao, Yuanzheng Yue
Summary: This study identifies the correlation between key structural factors and crack initiation resistance in aluminosilicate glasses. It successfully quantifies the fraction of three-coordinated oxygens and establishes the importance of oxygen tri-clusters in enhancing crack initiation resistance. These findings provide valuable insights for the design of glasses with superior mechanical performances.
Article
Chemistry, Multidisciplinary
Zijuan Du, Ang Qiao, Hemin Zhou, Zhencai Li, Wessel M. W. Winters, Jiexin Zhu, Guanjie He, Ivan P. Parkin, Haizheng Tao, Yuanzheng Yue
Summary: The glass transition temperature of bimetallic zeolitic imidazolate frameworks was found to non-linearly decrease with the presence of a mixed-metal node effect. This effect can be attributed to the increase in configurational freedom as the molar ratio of the metals increases.
CHEMICAL COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Zijuan Du, Ang Qiao, Hemin Zhou, Zhencai Li, Wessel M. W. Winters, Jiexin Zhu, Guanjie He, Ivan P. Parkin, Haizheng Tao, Yuanzheng Yue
Summary: This study prepared high-density amorphous phases of bimetallic zeolitic imidazolate frameworks and measured their heat capacity to determine the glass transition temperature. The results showed a nonlinear effect of the molar ratio R on the glass transition temperature, indicating an increase in configurational freedom as R increases. The study also found a close correlation between configurational freedom and network connectivity.
CHEMICAL COMMUNICATIONS
(2023)
