Nanoarchitectonics to entrap living cells in silica-based systems: encapsulations with yolk–shell and sepiolite nanomaterials

• Celia Martín-Morales,
• Jorge Fernández-Méndez,
• Pilar Aranda and
• Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2023, 14, 522–534, doi:10.3762/bjnano.14.43

• –alginate biohybrid beads strongly limit the diffusion of metabolites, as we determined by means of diffusion studies using Congo red and crystal violet dyes (Supporting Information File 1, Figure S1). It can be concluded that the developed sepiolite–biopolymer nanostructured materials exhibit interesting

• produced G57-4 silica gel material appears to be a rigid, semitransparent, lightly coloured material. Diffusional tests with an identically synthesised silica gel (G57-4 conditions) prepared in the presence of Congo red dye indicated a higher diffusional limit than that of the formerly studied sepiolite

• . The absorbance of Congo red and crystal red was measured at 541 and 400 nm, respectively. The ethanol production has been studied using single cultures of S. cerevisiae either as free cells or as cells immobilized within the silica matrix. Both cultures were kept under the same conditions, taking 2 mL

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

• structures. They discovered that the surface area increased from 3.3 to 9 m2/g with a significant reduction in bandgap from 2.08 to 1.49 eV when La3+ and Mn2+ ions were co-doped into the BiFeO3 host material. Within 120 min of exposure to visible light, the co-doped photocatalyst degraded Congo red dye by

• a core–shell heterojunction nanocomposite made of BiFeO3 and TiO2 for the degradation of textile dye. The authors reported a 70% degradation of Congo red dye after 70 min of visible-light irradiation, which they attributed to an improvement in quantum efficiency caused by the efficient separating of

• . BiFeO3-graphene nanocomposites were made using a hydrothermal process by Lam and co-workers [177]. Under visible-light photocatalysis, the nanocomposite efficiently degraded Congo red dye. The improved performance was attributed to the altered bandgap between graphene oxide and BiFeO3. Table 9 provides a

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

• (16.95 g/g). Moreover, the membrane exhibited a high flux and high separation efficiency of 98.1% [73]. Organic dyes are complex structures with high molecular weight, predominantly with ring structures, and can be anionic or cationic. Direct red 23 (DR23), indigo carmine (IC), congo red (CR), and

Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

• Wei Fang,
• Liang Yu and
• Lan Xu

Beilstein J. Nanotechnol. 2020, 11, 631–650, doi:10.3762/bjnano.11.50

• protection. Water pollution with organic dyes (such as congo red, methylene blue, and methyl orange) is becoming a major environmental problem. Therefore, water purification technologies, such as photocatalytic purification, electrochemical oxidation, membrane filtration, ozonation, and chlorination

Photoactive nanoarchitectures based on clays incorporating TiO₂ and ZnO nanoparticles

• Eduardo Ruiz-Hitzky,
• Pilar Aranda,
• Marwa Akkari,
• Nithima Khaorapapong and
• Makoto Ogawa

Beilstein J. Nanotechnol. 2019, 10, 1140–1156, doi:10.3762/bjnano.10.114

• photodegradation of diverse organic compounds, including the photodecolorization of dyes such as methylene blue (MB), methyl green (MG), acid red G, acid yellow 11, acid orange 11, and Congo red, in water, as well as other photo-applications, for instance, water splitting under UV or visible/solar light

Nanocellulose: Recent advances and its prospects in environmental remediation

• Katrina Pui Yee Shak,
• Yean Ling Pang and
• Shee Keat Mah

Beilstein J. Nanotechnol. 2018, 9, 2479–2498, doi:10.3762/bjnano.9.232

• functionalization of cellulose with cationic hyperbranched polyethylenimine presented high adsorption capacity for congo red (2100 mg/g) and basic yellow (1860 mg/g). Sulphonated cellulose possesses a high amount of sulphur binding sites, high anionic charge, and larger surface area, thereby displaying a high

• biosorbent has been developed and employed for congo red adsorption [99]. The benzyl groups within the cellulose structures are responsible for the magnetic nature of the polymeric ionic liquid which was created via reaction with epichlorohydrin and 1-methylimidazole. In addition, the functionalization could

Facile synthesis of ZnFe₂O₄ photocatalysts for decolourization of organic dyes under solar irradiation

• Arjun Behera,
• Debasmita Kandi,
• Sanjit Manohar Majhi,
• Satyabadi Martha and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 436–446, doi:10.3762/bjnano.9.42

• , FESEM, UV–vis DRS, PL, FTIR and photocurrent measurements. The photocatalytic activity of the prepared material is studied with regard to the degradation of rhodamine B (Rh B) and Congo red under solar irradiation. The kinetic study showed that the material exhibits zeroth and first order reaction

• kinetics for the degradation of Rh B and Congo red, respectively. The photocatalytic behaviour of ZnFe2O4 was systematically studied as a function of the activation temperature. ZnFe2O4 prepared at 500 °C showed the highest activity in degrading Rh B and Congo red. The highest activity of ZnFe2O4-500 °C

• correlates well with the lowest PL intensity, highest photocurrent and lowest particle size. Keywords: Congo red; electrochemical study; phenol; photocatalyst; rhodamine B (Rh B); ZnFe2O4; Introduction Photocatalysis is a “green” technology for the treatment of environmental pollutants with solar energy [1

Strategy to discover full-length amyloid-beta peptide ligands using high-efficiency microarray technology

• Clelia Galati,
• Natalia Spinella,
• Lucio Renna,
• Danilo Milardi,
• Francesco Attanasio,
• Michele Francesco Maria Sciacca and
• Corrado Bongiorno

Beilstein J. Nanotechnol. 2017, 8, 2446–2453, doi:10.3762/bjnano.8.243

• ]. Thus, the design of novel molecules that target Aβ monomers and able to prevent the formation of small toxic oligomers may be considered a promising goal of a number of therapeutic strategies under development. Thus far, a number of different compounds including Congo Red derivatives [6], antibodies [7

Dispersion of single-wall carbon nanotubes with supramolecular Congo red – properties of the complexes and mechanism of the interaction

• Anna Jagusiak,
• Barbara Piekarska,
• Tomasz Pańczyk,
• Małgorzata Jemioła-Rzemińska,
• Elżbieta Bielańska,
• Barbara Stopa,
• Grzegorz Zemanek,
• Janina Rybarska,
• Irena Roterman and
• Leszek Konieczny

Beilstein J. Nanotechnol. 2017, 8, 636–648, doi:10.3762/bjnano.8.68

• , Jagiellonian University, Krakow, Poland Department of Bioinformatics and Telemedicine, Jagiellonian University Medical College, św. Łazarza 16, Kraków 31-034, Poland 10.3762/bjnano.8.68 Abstract A method of dispersion of single-wall carbon nanotubes (SWNTs) in aqueous media using Congo red (CR) is proposed

• and form supramolecular and protruding structures. This explains the high CR binding capacity of carbon nanotubes. The presented system – containing SWNTs covered with CR – offers a wide range of biomedical applications. Keywords: Congo red; single-wall carbon nanotubes; supramolecular compounds

• length influences CNT toxicity and cellular uptake [22][23]. Surfactants commonly used for dispersion of CNTs include SDS, CTAB, Triton X-100 or sodium cholate [24][25][26]. A less known approach is based on the interaction of CNTs with a bis-azo dye – Congo red (CR) [27]. This original procedure was

Functional diversity of resilin in Arthropoda

• Jan Michels,
• Esther Appel and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2016, 7, 1241–1259, doi:10.3762/bjnano.7.115

Applicability and costs of nanofiltration in combination with photocatalysis for the treatment of dye house effluents

• Wolfgang M. Samhaber and
• Minh Tan Nguyen

Beilstein J. Nanotechnol. 2014, 5, 476–484, doi:10.3762/bjnano.5.55

• ], nanofiltration (NF) [5][10][19][20][21] and reverse osmosis (RO) [19]. Recently, the combination with membrane distillation (MD) [10][18] has also been proposed for the treatment of dye industry effluents. Molinari et al. [21] studied the degradation of two commercial azo-dyes, namely Congo red (C32H22N6Na2O6S2