Classification and application of metal-based nanoantioxidants in medicine and healthcare

• Nguyen Nhat Nam,
• Nguyen Khoi Song Tran,
• Tan Tai Nguyen,
• Nguyen Ngoc Trai,
• Nguyen Phuong Thuy,
• Hoang Dang Khoa Do,
• Nhu Hoa Thi Tran and
• Kieu The Loan Trinh

Beilstein J. Nanotechnol. 2024, 15, 396–415, doi:10.3762/bjnano.15.36

• Co-doped Fe3O4 nanozymes [108], WS2, MoSe2, WSe2 nanosheets [109], carbogenic nanozymes [110], and Pt/CeO2 nanozymes [111][112] also showed excellent RNS scavenging capability. Table 2 gives an overview of experiments using antioxidant nanomaterials for the treatment of oxidative stress-related

• ]. Similarly, Zeng et al. employed this strategy to fabricate a CeO2 nanozyme-loaded nanovesicle to address hypoxia at the tumor sites [169]. In this system, the CeO2 nanozyme with the ability to generate the cycle of redox reactions continuously provides a significant amount of O2 for assisting cancer

• personalized and targeted treatments for sclerosis. Recently developed Fe3O4–CeO2 core–shell NPs have shown great potential as platforms for both the diagnosis and treatment of vascular disorders associated with ROS. This is attributed to their impressive magnetic resonance imaging (MRI) capabilities and

Measurements of dichroic bow-tie antenna arrays with integrated cold-electron bolometers using YBCO oscillators

• Leonid S. Revin,
• Dmitry A. Pimanov,
• Alexander V. Chiginev,
• Anton V. Blagodatkin,
• Viktor O. Zbrozhek,
• Andrey V. Samartsev,
• Anastasia N. Orlova,
• Dmitry V. Masterov,
• Alexey E. Parafin,
• Victoria Yu. Safonova,
• Anna V. Gordeeva,
• Andrey L. Pankratov,
• Leonid S. Kuzmin,
• Anatolie S. Sidorenko,
• Silvia Masi and
• Paolo de Bernardis

Beilstein J. Nanotechnol. 2024, 15, 26–36, doi:10.3762/bjnano.15.3

• deposition of cerium dioxide CeO2 on the heated substrate as a buffer layer. The dimensions of the obtained Josephson junctions were 50 µm in length and 0.3 µm in thickness. At a temperature T ~ 2.7 K, the value of the critical current density was ~400 kA/cm2 with the ICRN product of ~1.6 mV. The junctions

Carboxylic acids and light interact to affect nanoceria stability and dissolution in acidic aqueous environments

• Matthew L. Hancock,
• Eric A. Grulke and
• Robert A. Yokel

Beilstein J. Nanotechnol. 2023, 14, 762–780, doi:10.3762/bjnano.14.63

• resulted in loss or overcoating of the surface citrate, and, in some cases, agglomeration [10]. Exposure to vitamin C and glutathione led to dissolution-accompanied aggregation of mesoporous silica CeO2 nanoparticles [35]. The shortening of ceria nanorods from 25 to 8 nm after 14 days at 200 °C was

Hydroxyapatite–bioglass nanocomposites: Structural, mechanical, and biological aspects

• Olga Shikimaka,
• Mihaela Bivol,
• Bogdan A. Sava,
• Marius Dumitru,
• Christu Tardei,
• Beatrice G. Sbarcea,
• Daria Grabco,
• Constantin Pyrtsac,
• Daria Topal,
• Andrian Prisacaru,
• Vitalie Cobzac and
• Viorel Nacu

Beilstein J. Nanotechnol. 2022, 13, 1490–1504, doi:10.3762/bjnano.13.123

• by an unconventional wet route followed by melting [31][37][38]. As raw materials, the ultra-purity grade reagents boron oxide (B2O3), magnesium oxide (MgO,) potassium carbonate (K2CO3), phosphoric acid (H3PO4), silicon dioxide (SiO2), zinc oxide (ZnO), and cerium oxide (CeO2) have been used. The

Coordination-assembled myricetin nanoarchitectonics for sustainably scavenging free radicals

• Xiaoyan Ma,
• Haoning Gong,
• Kenji Ogino,
• Xuehai Yan and
• Ruirui Xing

Beilstein J. Nanotechnol. 2022, 13, 284–291, doi:10.3762/bjnano.13.23

• used for effectively scavenging multiple ROS. Metal-based nanomaterials, such as CeO2 and Fe3O4, have been widely applied for antioxidant therapy [10]. In addition, bioactive small-molecule compounds, such as bilirubin and curcumin, and antioxidant peptides such as glutathione (GSH) and casein

A comprehensive review on electrospun nanohybrid membranes for wastewater treatment

• Senuri Kumarage,
• Imalka Munaweera and
• Nilwala Kottegoda

Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10

• membrane to remove Pb2+ and Cu2+ ions from aqueous solutions by electrospinning PVP and 3-mercaptopropyltrimethoxysilane (TMPTMS) infused with cerium oxide [62]. Also, they have modified the PVP/CeO2/TMPTMS nanofibers with a surfactant (Pluronic123) to obtain smaller fiber diameters and greater pore volume

• and average pore diameters. The analysis showed that PVP/CeO2/TMPTMS/P123 had a five times larger surface area than PVP/CeO2, which resulted in a maximum adsorption capacity of 272.3 mg/g for Pb2+ and 263.4 mg/g for Cu2+ ion, approximately three times greater than the adsorption capacity of PVP/CeO2

The preparation temperature influences the physicochemical nature and activity of nanoceria

• Robert A. Yokel,
• Wendel Wohlleben,
• Johannes Georg Keller,
• Matthew L. Hancock,
• Jason M. Unrine,
• D. Allan Butterfield and
• Eric A. Grulke

Beilstein J. Nanotechnol. 2021, 12, 525–540, doi:10.3762/bjnano.12.43

• curve fitting of the cumulative dissolved mass, expressed as an inverse relationship of decreasing solid retained (CeO2 mass) as (Mion(T) − M0)/M0, where Mion is the amount of dissolved nanoceria and M0 is the initial mass loading, and plotted as a function of the time on a semi-log scale. The

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

• Matías Guerrero Correa,
• Fernanda B. Martínez,
• Cristian Patiño Vidal,
• Camilo Streitt,
• Juan Escrig and
• Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

• , which involves the reaction of an organic chemical with water, has been used to obtain ellipsoidal monocrystallites of CeO2 with an average size of ≈7 nm [48][49]. The reverse micelle technique, also known as the microemulsion technique, is used to synthesize nanoparticles of various materials with

• convenient method for growing NPs. By varying the synthesis parameters, a variety of nanostructures, such as spherical CeO2 NPs [61], lamellar MgO NPs [62], and even ZnO nanorods [69] can be obtained by using this method. In the sonochemical synthesis method, a high-intensity ultrasound produces an acoustic

• cavitation that can be used for the production or modification of a wide range of nanostructured materials. Some examples are spherical Ag [63] and CuO NPs [65], and square-shaped CeO2 NPs [64]. The main advantage of this technique is the simplicity in maintaining the operating conditions (ambient conditions

Advanced hybrid nanomaterials

• Andreas Taubert,
• Fabrice Leroux,
• Pierre Rabu and
• Verónica de Zea Bermudez

Beilstein J. Nanotechnol. 2019, 10, 2563–2567, doi:10.3762/bjnano.10.247

• a polymer shell armored with an inorganic layer (cerium oxide nanoparticles). CeO2 nanoparticles act as oxygen scavengers, protecting the organic fluorophore from molecular oxygen. A different approach to luminescent composite films is reported in “Towards rare-earth-free white light-emitting diode

Microbubbles decorated with dendronized magnetic nanoparticles for biomedical imaging: effective stabilization via fluorous interactions

• Da Shi,
• Justine Wallyn,
• Dinh-Vu Nguyen,
• Francis Perton,
• Delphine Felder-Flesch,
• Sylvie Bégin-Colin,
• Mounir Maaloum and
• Marie Pierre Krafft

Beilstein J. Nanotechnol. 2019, 10, 2103–2115, doi:10.3762/bjnano.10.205

• range of molecules, including phospholipids [36], polymers [17], proteins [37], biomarkers [38] and CeO2 nanoparticles [39]. But the most important finding here is that the fluorocarbon gas affects the adsorption of the IONPs differently, depending on whether the dendron carries a fluorinated end group

Review of advanced sensor devices employing nanoarchitectonics concepts

• Katsuhiko Ariga,
• Tatsuyuki Makita,
• Masato Ito,
• Taizo Mori,
• Shun Watanabe and
• Jun Takeya

Beilstein J. Nanotechnol. 2019, 10, 2014–2030, doi:10.3762/bjnano.10.198

• processes, such as catalytic reactions and fluorescence quenching, often improves sensor capabilities through component nanoarchitectonics. Imanaka and co-workers used a combustion process induced by a precious-metal-free CeO2–ZrO2–ZnO catalyst for CO gas detection [87]. The semiconducting (p-type) La2CuO4

• -loaded CeO2–ZrO2–ZnO catalyst has a small heat capacity and dramatically increases the temperature of the Pt coil, resulting in a highly sensitive sensor signal. On the other hand, the n-type Sm2CuO4-loaded CeO2–ZrO2–ZnO catalyst is advantageous when rapid response and low temperature operation are

Hierarchically structured 3D carbon nanotube electrodes for electrocatalytic applications

• Pei Wang,
• Katarzyna Kulp and
• Michael Bron

Beilstein J. Nanotechnol. 2019, 10, 1475–1487, doi:10.3762/bjnano.10.146

• to solve these issues are focused on the optimization of the catalyst, such as alloying Pt with a second metal such as Ni, Ru and Pd [20][21][22][23][24] or using Pt-metal oxide composites such as Pt/SnO2 and Pt/CeO2 [24][25][26][27][28]. Additionally, a variety of catalyst preparation methods, e.g

Luminescence of Tb₃Al₅O₁₂ phosphors co-doped with Ce³⁺/Gd³⁺ for white light-emitting diodes

• Yu-Guo Yang,
• Lei Wei,
• Jian-Hua Xu,
• Hua-Jian Yu,
• Yan-Yan Hu,
• Hua-Di Zhang,
• Xu-Ping Wang,
• Bing Liu,
• Cong Zhang and
• Qing-Gang Li

Beilstein J. Nanotechnol. 2019, 10, 1237–1242, doi:10.3762/bjnano.10.123

• are driven under different currents. Experimental A series of Tb2.96−xCe0.04GdxAl5O12 (x = 0, 0.05, 0.10, 0.15, 0.20, and 0.25) phosphors were synthesized through solid-state reactions in a reduction atmosphere (5% H2/95% N2). Al2O3 (99.9%), Tb4O7 (99.9%), CeO2 (99.99%) and Gd2O3 (99.95%) were used as

Synthesis of MnO₂–CuO–Fe₂O₃/CNTs catalysts: low-temperature SCR activity and formation mechanism

• Yanbing Zhang,
• Lihua Liu,
• Yingzan Chen,
• Xianglong Cheng,
• Chengjian Song,
• Mingjie Ding and
• Haipeng Zhao

Beilstein J. Nanotechnol. 2019, 10, 848–855, doi:10.3762/bjnano.10.85

• uneconomic and unsafe. Our previous studies, including MnO2–Fe2O3–CeO2–Ce2O3/CNTs [16] and Ce2O3–CeO2–CuO–MnO2/CNTs [17] catalysts, have reported a simple and mild redox method for the preparation of ternary and quaternary catalysts, and the resultant catalysts show outstanding denitration activity at 80–180

• shows three catalysts with excellent performance in the low-temperature NO reduction with NH3, but the chemical reactions during preparation are different. The 6% Ce2O3–CeO2–CuO–MnO2/CNTs and 4% MnO2–Fe2O3–CeO2–Ce2O3/CNT catalysts present outstanding denitration efficiency values over the test

Ceria/polymer nanocontainers for high-performance encapsulation of fluorophores

• Kartheek Katta,
• Dmitry Busko,
• Yuri Avlasevich,
• Katharina Landfester,
• Stanislav Baluschev and
• Rafael Muñoz-Espí

Beilstein J. Nanotechnol. 2019, 10, 522–530, doi:10.3762/bjnano.10.53

• crystallization experiments with specific concentration. The surface charge density was determined at pH 10 to ensure the complete deprotonation of the carboxylic groups. Synthesis of CeO2/polymer hybrid nanocapsules The synthesized polymeric nanocapsules, NC and NC(Ar), were used in the crystallization

• experiments to obtain the hybrid samples, NC-CeO2 and NC(Ar)-CeO2, respectively. We apply an analogous procedure to the one used for solid particles [10][12]. The experiment was carried out at 35 °C in a closed flask under constant stirring while keeping the pH value constant during the whole procedure. First

• precipitation of Ce(OH)3, which is insoluble in water. In an alkaline environment, Ce(OH)3 is spontaneously oxidized to hydrated Ce(IV) ions by the oxygen of the environment, and then hydrolyzed to form hydroxocomplexes, which eventually evolve to CeO2 [47]. The mixture was further stirred for 24 h to complete

Graphene-enhanced metal oxide gas sensors at room temperature: a review

• Dongjin Sun,
• Yifan Luo,
• Marc Debliquy and
• Chao Zhang

Beilstein J. Nanotechnol. 2018, 9, 2832–2844, doi:10.3762/bjnano.9.264

• addition of rGO increased carrier concentrations and provided conductive pathways, which favored the transfer of electrons. The CeO2–rGO sensor reported by Jiang et al. [58] exhibited 8.2-times higher sensitivity and faster response than that of a pure rGO sensor at room temperature. The p–n

• heterojunctions are responsible for the exceptional NO2 sensing performance of CeO2–rGO sensor. Zhang et al. [59] added GO suspension to a Fe(NO3)3·9H2O solution, then synthesized α-Fe2O3–rGO hybrids via hydrothermal method. During the process of testing, the authors found that the doping amount of graphene

Improved catalytic combustion of methane using CuO nanobelts with predominantly (001) surfaces

• Qingquan Kong,
• Yichun Yin,
• Bing Xue,
• Yonggang Jin,
• Wei Feng,
• Zhi-Gang Chen,
• Shi Su and
• Chenghua Sun

Beilstein J. Nanotechnol. 2018, 9, 2526–2532, doi:10.3762/bjnano.9.235

• , NW and NB samples where the oxidation activity follows the order: NBs > NWs > NPs. It is particularly notable that the NB performance is even close to that of 1% Pd loaded on Co3O4 [27], which itself shows excellent catalytic capacity. Supermolecular Pd@CeO2 core–shell structures can offer

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

• /SnO2 mixed NFs show response time/recovery times of 1/305 s [224]. In2O3-CeO2 NTs synthesized by electrospinning exhibit an excellent response toward H2S at low temperature (25–110 °C) and to acetone at relatively high temperature (300 °C) [225]. The outer diameter and wall thickness are tuned in the

• range of 90–180 nm and 15–9 nm, respectively, by changing the molar concentration of In2O3 and CeO2. The diameters and wall thickness of In75Ce25, In50Ce50, In25Ce75 and CeO2 NTs are ≈100, 120, 140, 180 nm and 12, 10, 9, and 9 nm, respectively. The diameter increases with an increase in Ce concentration

• in different samples whereas the wall thickness decreases [225]. The binary In2O3-CeO2 (In75Ce25) NTs exhibit a high response of 498 to 20 ppm of H2S at 80 °C and 30 toward 200 ppm of acetone at 300 °C, respectively. The response and recovery times for H2S and acetone are 64/204 s and 9/80 s

Cryochemical synthesis of ultrasmall, highly crystalline, nanostructured metal oxides and salts

• Elena A. Trusova and
• Nikolai S. Trutnev

Beilstein J. Nanotechnol. 2018, 9, 1755–1763, doi:10.3762/bjnano.9.166

• /bjnano.9.166 Abstract In the present investigation, the cryochemical approach was used for the improved synthesis of nanocrystalline metal oxides (e.g., NiO, Fe2O3, CeO2) and NaNO3 salt. It was shown that the solutions and sols can be treated with a liquid nitrogen stream (−196 °C) to increase the powder

• dispersity by 3–18 times and to increase their specific surface area by an order of magnitude. The proposed approach also reduces the agglomeration of the nanoparticles, and at the same time, results in NiO, Fe2O3 and CeO2 crystallite sizes of less than 10 nm (quantum dot size regime). The diameter of NaNO3

• that of the same composition prepared directly from an as-prepared microemulsion. In [14] we reported on a method for producing metal oxides (CeO2, Fe2O3 and NiO) with a crystallite size less than ≤10 nm by a combination of the sol–gel method and cryotechnology. The essence of the method is to create

Cr(VI) remediation from aqueous environment through modified-TiO₂-mediated photocatalytic reduction

• Rashmi Acharya,
• Brundabana Naik and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137

Understanding the performance and mechanism of Mg-containing oxides as support catalysts in the thermal dry reforming of methane

• Nor Fazila Khairudin,
• Mohd Farid Fahmi Sukri,
• Mehrnoush Khavarian and
• Abdul Rahman Mohamed

Beilstein J. Nanotechnol. 2018, 9, 1162–1183, doi:10.3762/bjnano.9.108

• morphology, structure, and catalytic properties of the Ni–Ce/Mg–Al catalyst in DRM by Daza et al. [50], Ce and Mg are concluded to exert a synergistic effect on CO2 adsorption. Although the basic properties of Ce exert a significant effect on catalyst basicity, the bulk CeO2 possesses low basic properties

• . Therefore, the combination of Ce with Mg improves the catalyst basicity site. CeO2, commonly known for its oxygen storage capacity, contains a great concentration of highly mobile oxygen vacancies which could reduce the deposition of carbon on the catalyst surface [76]. In fact, CO2 molecules are more

• attracted to the base center (–Mg–OH group) and then dissociate on Ce2O3 via electron transfer to CO2 through oxygen vacancies to form CO2 and CeO2. Thus, the base center is most suitable for adsorbing the largest amount of CO2. The catalyst was stable for up to 50 h of reaction at 700 °C with an equal feed

Effect of annealing treatments on CeO₂ grown on TiN and Si substrates by atomic layer deposition

• Silvia Vangelista,
• Rossella Piagge,
• Satu Ek and
• Alessio Lamperti

Beilstein J. Nanotechnol. 2018, 9, 890–899, doi:10.3762/bjnano.9.83

• this work, we investigate the effect of thermal treatment on CeO2 films fabricated by using atomic layer deposition (ALD) on titanium nitride (TiN) or on silicon (Si) substrates. In particular, we report on the structural, chemical and morphological properties of 25 nm thick ceria oxide with particular

• crystallization. When ceria is deposited on TiN, the temperature has to be limited to 600 °C due to the thermal instability of the underlying TiN substrate with a broadening of the interface, while there are no changes detected inside the CeO2 films. As-deposited CeO2 films show a cubic fluorite polycrystalline

• deposition process. This result is interpreted in the light of the contributions of different energy components (surface energy and elastic modulus) which act dependently on the substrate properties, such as its nature and structure. Keywords: atomic layer deposition; cerium(IV) oxide (CeO2) microstructure

A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

• Shahreen Binti Izwan Anthonysamy,
• Syahidah Binti Afandi,
• Mehrnoush Khavarian and
• Abdul Rahman Bin Mohamed

Beilstein J. Nanotechnol. 2018, 9, 740–761, doi:10.3762/bjnano.9.68

• mechanism over a MnOx-CeO2 catalyst reaction. The adsorbed NH3 on the Lewis acid sites formed activated NH3, which is a NH2− species, in the oxidation dehydrogenation process. The NO that was oxidised to NO2 on the catalyst surface reacted with NH2− to produce intermediate nitrosamine (NH2NO). The proposed

• sites and reacted directly with gaseous NO to form N2 and H2O, as per Equation 10–12, respectively: In addition, Cha et al. [19] also proposed the Eley–Rideal mechanism involving CeO2. The higher quantity of Ce3+ ions over the Ce4+ ions facilitated the oxidation of NH3 to N2 and H2O for NO reduction in

• , following the Langmuir–Hinshelwood mechanism. Shi et al. [25] used DRIFT to investigate the chemical reaction of reactants with the Lewis acid site and Brønsted acid site to improve activity at low temperature. Chen et al. [26] found that CeO2 provided both acid sites, while WO3 helped in increasing the

Mechanistic insights into plasmonic photocatalysts in utilizing visible light

• Kah Hon Leong,
• Azrina Abd Aziz,
• Lan Ching Sim,
• Pichiah Saravanan,
• Min Jang and
• Detlef Bahnemann

Beilstein J. Nanotechnol. 2018, 9, 628–648, doi:10.3762/bjnano.9.59

• adsorbed molecules to promote significant enhancement in the rate of chemical transformation. Furthermore, there are certain cases that have showed primary evidence for direct plasmon-driven photocatalysis capable of controlling catalytic selectivity through different reaction mechanisms. Gold NPs on CeO2

Fabrication of CeO₂–MO_x (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

• Ling Liu,
• Jingjing Shi,
• Hongxia Cao,
• Ruiyu Wang and
• Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

• , Xuzhou 221008, People’s Republic of China School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, People’s Republic of China 10.3762/bjnano.8.241 Abstract CeO2–MOx (M = Cu, Co, Ni) composite yolk–shell nanospheres with uniform size were fabricated by a

• general wet-chemical approach. It involved a non-equilibrium heat-treatment of Ce coordination polymer colloidal spheres (Ce-CPCSs) with a proper heating rate to produce CeO2 yolk–shell nanospheres, followed by a solvothermal treatment of as-synthesized CeO2 with M(CH3COO)2 in ethanol solution. During the

• solvothermal process, highly dispersed MOx species were decorated on the surface of CeO2 yolk–shell nanospheres to form CeO2–MOx composites. As a CO oxidation catalyst, the CeO2–MOx composite yolk–shell nanospheres showed strikingly higher catalytic activity than naked CeO2 due to the strong synergistic