Bismuth-based nanostructured photocatalysts for the remediation of antibiotics and organic dyes

• Akeem Adeyemi Oladipo and
• Faisal Suleiman Mustafa

Beilstein J. Nanotechnol. 2023, 14, 291–321, doi:10.3762/bjnano.14.26

• donor or acceptor on the surface of the photocatalyst may continue to interact. Nothing happens in the first scenario. In the second scenario, an electron or hole interacts with dissolved oxygen or water to produce ROS (e.g., •OH, O2•−). These ROS play a significant role in the photo-oxidation/reduction

Tin dioxide nanomaterial-based photocatalysts for nitrogen oxide oxidation: a review

• Viet Van Pham,
• Hong-Huy Tran,
• Thao Kim Truong and
• Thi Minh Cao

Beilstein J. Nanotechnol. 2022, 13, 96–113, doi:10.3762/bjnano.13.7

• min. This enhancement of the photocatalytic activity was interpreted as the synergistic effect between the high photo-oxidation ability of SnO2 triggered by the visible light response of g-C3N4. Also, the key role of the SnO2/g-C3N4 interface in inhibiting the production of NO2 facilitates the

A review on nanostructured silver as a basic ingredient in medicine: physicochemical parameters and characterization

• Gabriel M. Misirli,
• Kishore Sridharan and
• Shirley M. P. Abrantes

Beilstein J. Nanotechnol. 2021, 12, 440–461, doi:10.3762/bjnano.12.36

• experimentally analyzed by UV–vis extinction spectra and transmission electron microscopy (TEM). The rate of photo-oxidation in spherical AgNPs was homogeneous and surprisingly inhomogeneous in the case of cubic AgNPs, which was attributed to the difference in morphology. The noticeable formation of small NPs

• (AgxO) around the spherical AgNPs after light exposure, observed in the TEM micrograph shown in Figure 4a, confirmed the quicker photo-oxidation process [52][58]. After 40 h of light irradiation, the level of oxidation in cubic AgNPs was about 30%, while it took only 9 h of light irradiation for the

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

• as functionalized films with high dielectric constant, or, in the case of optical applications, this consists also in embedding different types of nanoparticles. In the first example, “Co-intercalated layered double hydroxides as thermal and photo-oxidation stabilizers for polypropylene”, the

• concomitant intercalation of both a thermal and a photo-oxidation stabilizer endows polypropylene with remarkable resistance against thermal degradation and photo-oxidation [25]. In the same vein, the protection of the polymer using organo-modified LDH was addressed in “Outstanding chain-extension effect and

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

• interaction between electronic excited state of TDI and ground-state molecular oxygen within the encapsulated materials, which results in photo-oxidation processes. To overcome the limitations caused by oxygen influence, a sample named as NC(Ar) was prepared in a closed flask in argon atmosphere. The sample

• atmosphere. The enhancement effect can be explained by the trapping of the quenching oxygen molecules on the metal oxide surface, which results in a reduction of the photo-oxidation. Schematic representation of the formation of cerium(IV) oxide on the surface of carboxylate functionalized fluorescent

Co-intercalated layered double hydroxides as thermal and photo-oxidation stabilizers for polypropylene

• Qian Zhang,
• Qiyu Gu,
• Fabrice Leroux,
• Pinggui Tang,
• Dianqing Li and
• Yongjun Feng

Beilstein J. Nanotechnol. 2018, 9, 2980–2988, doi:10.3762/bjnano.9.277

• -dimethylethyl)-4-hydroxyphenyl]methyl]phosphonate] (Irganox 1425, MP-Ca) and a photo-oxidation stabilizer (hindered amine light stabilizer, HALS) are co-intercalated into the interlayer regions of layered double hydroxides (LDH) in a one-step coprecipitation. These hybrid organic–inorganic materials are

• successively dispersed in polypropylene to form HnMn′-Ca2Al/PP composite films (with H = HALS and M = MP) through a solvent casting method. The corresponding crystalline structure, chemical composition, morphology as well as the resistance against thermal aging and photo-oxidation are carefully investigated by

• various techniques. The results show that the powdered HnMn′-Ca2Al-LDHs hybrid materials have a much higher thermal stability than MP-Ca and HALS before intercalation. In addition, the HnMn′-Ca2Al/PP composites exhibit a higher overall resistance against thermal degradation and photo-oxidation compared to

Fabrication and photoactivity of ionic liquid–TiO₂ structures for efficient visible-light-induced photocatalytic decomposition of organic pollutants in aqueous phase

• Anna Gołąbiewska,
• Marta Paszkiewicz-Gawron,
• Aleksandra Sadzińska,
• Wojciech Lisowski,
• Ewelina Grabowska,
• Adriana Zaleska-Medynska and
• Justyna Łuczak

Beilstein J. Nanotechnol. 2018, 9, 580–590, doi:10.3762/bjnano.9.54

• the IL–TiO2 composites, for example, for photo-electrochemical water splitting [26][27], photo-oxidation of benzyl alcohol [12], phenol [28], degradation of chlorophenol [17][29], reduction of Cr6+ to Cr3+ [30] and the photocatalytic desulfurization of diesel oil [31]. Nevertheless, in most of these

• , indicating that h+ might play a negligible role in the phenol photo-oxidation process. Probably the positively charged hole could catch OH− to yield hydroxyl radicals [58]. In the case of the TiO2_T(1:3) sample, when tert-butyl alcohol (•OH scavenger) was added to the phenol solution, 63% of phenol was

Evaluating the toxicity of TiO₂-based nanoparticles to Chinese hamster ovary cells and Escherichia coli: a complementary experimental and computational approach

• Alicja Mikolajczyk,
• Natalia Sizochenko,
• Ewa Mulkiewicz,
• Anna Malankowska,
• Michal Nischk,
• Przemyslaw Jurczak,
• Seishiro Hirano,
• Grzegorz Nowaczyk,
• Adriana Zaleska-Medynska,
• Jerzy Leszczynski,
• Agnieszka Gajewicz and
• Tomasz Puzyn

Beilstein J. Nanotechnol. 2017, 8, 2171–2180, doi:10.3762/bjnano.8.216

• increasing concentration of Bi2WO6 [23]. In another contribution, the photo-oxidation capability of iron-doped TiO2 NPs increased during exposure to near-visible light. Fe-doped TiO2 NPs inhibited the macrophage RAW 264.7 [24]. Hence the same unique properties of surface-modified TiO2-based nanomaterials

Effect of SiN_x diffusion barrier thickness on the structural properties and photocatalytic activity of TiO₂ films obtained by sol–gel dip coating and reactive magnetron sputtering

• Mohamed Nawfal Ghazzal,
• Eric Aubry,
• Nouari Chaoui and
• Didier Robert

Beilstein J. Nanotechnol. 2015, 6, 2039–2045, doi:10.3762/bjnano.6.207

• photocatalytic efficiency. The photobleaching of the OII dye in the presence of the catalyst was performed at neutral pH 7.2 during 2 h of UV–vis illumination. At neutral pH, the bleaching of OII was caused by photo-oxidation via formation of radicals and/or a UV-induced modification of the surface, leading to

Transformation of hydrogen titanate nanoribbons to TiO₂ nanoribbons and the influence of the transformation strategies on the photocatalytic performance

• Melita Rutar,
• Nejc Rozman,
• Matej Pregelj,
• Carla Bittencourt,
• Romana Cerc Korošec,
• Andrijana Sever Škapin,
• Aleš Mrzel,
• Srečo D. Škapin and
• Polona Umek

Beilstein J. Nanotechnol. 2015, 6, 831–844, doi:10.3762/bjnano.6.86

• increasing calcination temperature (Figure 2). The observed effect is in agreement with the findings reported by Irie et al. [36], and Miyauchi et al. [45]. In a similar system, i.e., the photo-oxidation of iPrOH, they noticed that with an increasing N content, longer exposure times to UV and visible light

• photocatalytic performance was studied by using the photo-oxidation of isopropanol under UV–vis light as the model reaction. The photocatalytic performance of the TiO2 nanoribbons calcined in air continuously increased with the increasing calcination temperature and the anatase content. The presence of N as a

Novel ZnO:Ag nanocomposites induce significant oxidative stress in human fibroblast malignant melanoma (Ht144) cells

• Syeda Arooj,
• Samina Nazir,
• Akhtar Nadhman,
• Nafees Ahmad,
• Bakhtiar Muhammad,
• Ishaq Ahmad,
• Kehkashan Mazhar and
• Rashda Abbasi

Beilstein J. Nanotechnol. 2015, 6, 570–582, doi:10.3762/bjnano.6.59

• species they generated in vitro. A highly significant increase of 1O2 in the samples exposed to daylight was observed. Hydroxyl radical species, HO•, were also generated to a lesser extent. Thus, the incorporation of Ag into ZnO NPs significantly improves their photo-oxidation capabilities. ZnO:Ag

• nanocomposites could provide a new therapeutic option to selectively target cancer cells. Keywords: cancer therapy; cytotoxicity; photo-oxidation; ZnO:Ag nanocomposites; Introduction Zinc oxide (ZnO) nanoparticles (NPs) exhibit an excellent photo-oxidation activity [1] and are considered as potential

• thus exciting the photosensitizer to produce reactive oxygen species (ROS) such as singlet oxygen (1O2) and hydroxyl radicals (HO•) [6][7]. Photo-oxidation holds promises for the targeted treatment and controlled elimination of cancer cells [8]. ZnO NPs have also shown photo-oxidative anticancer

Nanostructure sensitization of transition metal oxides for visible-light photocatalysis

• Hongjun Chen and
• Lianzhou Wang

Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82

• photosensitization of semiconductors for potential applications in solar cells and photocatalysis. Another interesting phenomenon related to plasmonic metal nanoparticles is that the metal themselve may also be used as a photocatalyst for photo-oxidation or even water splitting. Carbon nanostructure as the

Modulation of defect-mediated energy transfer from ZnO nanoparticles for the photocatalytic degradation of bilirubin

• Tanujjal Bora,
• Karthik K. Lakshman,
• Soumik Sarkar,
• Abhinandan Makhal,
• Samim Sardar,
• Samir K. Pal and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2013, 4, 714–725, doi:10.3762/bjnano.4.81

• . Additionally, upon absorption of light, the (Z,Z)-BR isomers can also react with oxygen in the blood to form colorless oxidation products, which are typically excreted in the urine [2]. However, the photo-oxidation of (Z,Z)-BR is a slow process and the isomerization of (Z,Z)-BR occurs much faster than the

• photo-oxidation [5]. In recent years, the use of nanotechnology in medical science is gaining a lot of attention across the world. Research that focuses on the use of various nanostructured materials in different areas, such as for drug delivery [6], cancer treatments [7][8], etc. is underway. Out of

Variations in the structure and reactivity of thioester functionalized self-assembled monolayers and their use for controlled surface modification

• Inbal Aped,
• Yacov Mazuz and
• Chaim N. Sukenik

Beilstein J. Nanotechnol. 2012, 3, 213–220, doi:10.3762/bjnano.3.24

• wavelength light such that the photo-oxidation of the thioesters to sulfonic acid can be achieved with light of wavelength >300 nm. We have synthesized a series of thioesters (Figure 1) that were designed to provide a range of hydrophobicities (1a–i) and a range of photoreactivities (2–4). These

• their varying interactions with the different wavelengths of light used for SAM photo-oxidation. In situ SAM oxidations Monolayers of compounds 1–4 were all subjected to treatment with aqueous OXONE solutions under ambient conditions. In all cases, the starting monolayer is comprised of siloxane

• wavelengths. This was compared to irradiations done with a broad-spectrum, longer-wavelength UV lamp (UV-A, 320–400 nm). Since the UV–vis absorption spectra of all compounds 1 were the same, only 1a was used in the comparisons to the photo-oxidation behavior of compounds 2–4 at longer wavelength. The SAMs

Precursor concentration and temperature controlled formation of polyvinyl alcohol-capped CdSe-quantum dots

• Chetan P. Shah,
• Madhabchandra Rath,
• Manmohan Kumar and
• Parma N. Bajaj

Beilstein J. Nanotechnol. 2010, 1, 119–127, doi:10.3762/bjnano.1.14

• mixture of selenium powder (1 g) and Na2SO3 (10 g), in 50 mL water was heated under reflux in a 100 mL round-bottomed flask at 70 °C for about 7 h. After completion of the refluxing process, the reaction mixture was filtered and the clear transparent solution obtained was kept in dark to prevent photo

• -oxidation. The yield of sodium selenosulfate was 99%, based on the amount of selenium powder consumed in the reaction. The Na2SeSO3 solution (0.25 M) thus prepared was used as a stock solution for the Se source. Cd(OAc)2 solution (0.5 M) was used as a stock solution for the Cd source. A stock solution of