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

• mechanisms is included, along with potential antibiotic and dye degradation pathways in wastewater. Finally, areas that require additional study and attention regarding the usage of photocatalysts based on bismuth for removing pharmaceuticals and textile dyes from wastewater, particularly for real-world

• dye degradation after 180 min under visible-light irradiation. 2-D nanostructured materials are thought to function more effectively in photocatalytic processes than 3-D nanostructured photocatalysts [88][102][106][124]. This is because photogenerated carriers in a 2-D structure can rise from a deeper

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

• Nirmalendu S. Mishra and
• Pichiah Saravanan

Beilstein J. Nanotechnol. 2022, 13, 1380–1392, doi:10.3762/bjnano.13.114

• photosensitization of MB dye moieties generates additional photo-excited electrons which are transferred into the CB of MBN-80, resulting in enhanced charge carrier density and generation of •OH via the O2 reduction pathway, thus enhancing dye degradation. Conversely, the photocatalytic degradation of phenol showed

Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications

• Vishal Dutta,
• Ankush Chauhan,
• Ritesh Verma,
• C. Gopalkrishnan and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109

Green synthesis of zinc oxide nanoparticles toward highly efficient photocatalysis and antibacterial application

• Vo Thi Thu Nhu,
• Nguyen Duy Dat,
• Le-Minh Tam and
• Nguyen Hoang Phuong

Beilstein J. Nanotechnol. 2022, 13, 1108–1119, doi:10.3762/bjnano.13.94

• concentration to 5 mg/mL, the E. coli inhibition efficiency reached 99.96% in 6 h and the E. coli inhibition efficiency reached 100% when the ZnO NPs dose was increased to 10 mg/mL with a contact time of 6 h. Proposed mechanism of photocatalytic dye degradation and antibacterial activity against E. coli by ZnO

• activity in dye degradation (methylene blue and methyl orange). The photodegradation efficiency of a dye solution by ZnO NPs under UV is greater than that under visible light. ZnO NPs completely degraded a MB solution of 10 mg/L for 210 min under ultraviolet light while the MB degradation efficiency

• ) and MB (b) under visible and UV light. E. coli inhibition percentage by ZnO with different amounts of ZnO in various contact time intervals, with E. Coli initial concentrations of 5·104 CFU/mL (a) and 5·105 CFU/mL (b). Proposed mechanism of photocatalytic dye degradation and antibacterial activity

Solar-light-driven LaFe_xNi_1−xO₃ perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants

• Chao-Wei Huang,
• Shu-Yu Hsu,
• Jun-Han Lin,
• Yun Jhou,
• Wei-Yu Chen,
• Kun-Yi Andrew Lin,
• Yu-Tang Lin and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 882–895, doi:10.3762/bjnano.13.79

• ]. Ti-doped, Mn-doped [30], and Cu-doped [31] LaFeO3 were investigated to conduct a photocatalytic Fenton-like reaction. Jauhar et al. demonstrated that Mn substituting Fe within LaFeO3 with the molar ratio of 0.1–0.5 displayed the effect of being used as a heterogeneous photocatalyst for dye

• degradation. Though it was proven that Mn-doped LaFeO3 could enhance the activity of heterogeneous photo-Fenton-like reactions, the influence of Mn content on the activity was not significant [30]. Phan et al. verified that Cu-doped LaFeO3 exhibited physicochemical properties to decolorize methlyorgane

Sodium doping in brookite TiO₂ enhances its photocatalytic activity

• Boxiang Zhuang,
• Honglong Shi,
• Honglei Zhang and
• Zeqian Zhang

Beilstein J. Nanotechnol. 2022, 13, 599–609, doi:10.3762/bjnano.13.52

• heterojunction exhibited a synergetic effect, improving the photocatalytic activity for both hydrogen generation and organic dye degradation [10][11]). Similarly, the anatase/brookite heterojunction (38.2% brookite) also exhibited the highest degradation efficiency of cylindrospermopsin under UV–vis light [12

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

• . The organic dyes were degraded by catalytic activity, while oil and chemicals were removed by filtration. The filtration of kerosene, hexane, petroleum ether, chloroform, and toluene each mixed with water was carried out and the removal efficiency reached a value of 99.9%, while the dye degradation

Unravelling the interfacial interaction in mesoporous SiO₂@nickel phyllosilicate/TiO₂ core–shell nanostructures for photocatalytic activity

• Bridget K. Mutuma,
• Xiluva Mathebula,
• Isaac Nongwe,
• Bonakele P. Mtolo,
• Boitumelo J. Matsoso,
• Rudolph Erasmus,
• Zikhona Tetana and
• Neil J. Coville

Beilstein J. Nanotechnol. 2020, 11, 1834–1846, doi:10.3762/bjnano.11.165

• the core–shell nanostructure and yielded superior photocatalytic properties. Keywords: bandgap energy; core–shell; dye degradation; nickel phyllosilicate; photocatalysts; Introduction Textile dyes and organic compounds are major water pollutants, which create an environmental hazard to aquatic

A highly efficient porous rod-like Ce-doped ZnO photocatalyst for the degradation of dye contaminants in water

• Binjing Hu,
• Qiang Sun,
• Chengyi Zuo,
• Yunxin Pei,
• Siwei Yang,
• Hui Zheng and
• Fangming Liu

Beilstein J. Nanotechnol. 2019, 10, 1157–1165, doi:10.3762/bjnano.10.115

• , XPS, SEM and ICP, respectively. Furthermore, to supply a helpful reference for large-scale dye degradation, the optimum photocatalytic conditions of undoped and doped catalysts were also screened. Sample preparation Materials and instruments In this study, zinc acetate dihydrate was purchased from

Deposition of metal particles onto semiconductor nanorods using an ionic liquid

• Michael D. Ballentine,
• Elizabeth G. Embry,
• Marco A. Garcia and
• Lawrence J. Hill

Beilstein J. Nanotechnol. 2019, 10, 718–724, doi:10.3762/bjnano.10.71

• agents. Photocatalytic dye degradation experiments showed that catalysts with platinum particles deposited using the ionic liquid out-performed similar materials synthesized using organic solvents and ligands. We concluded that metal particles can be deposited onto well-defined semiconductor nanorods

• catalysts were prepared from a single batch of CdSe@CdS nanorods to eliminate any differences in nanorod substrates from our study. Thus, the only significant difference between the samples at the time of dye degradation experiments was whether the platinum particles were deposited in [bmim][Tf2N] or

• toluene/triethylamine. A known amount of the nanoparticle catalyst was combined with methylene blue and chloroform for photocatalytic dye degradation experiments (Figure 2a), based on the concentration of cadmium and platinum in the toluene dispersions obtained from ICP-AES. Control experiments were also

Zn/F-doped tin oxide nanoparticles synthesized by laser pyrolysis: structural and optical properties

• Florian Dumitrache,
• Iuliana P. Morjan,
• Elena Dutu,
• Ion Morjan,
• Claudiu Teodor Fleaca,
• Monica Scarisoreanu,
• Alina Ilie,
• Marius Dumitru,
• Cristian Mihailescu,
• Adriana Smarandache and
• Gabriel Prodan

Beilstein J. Nanotechnol. 2019, 10, 9–21, doi:10.3762/bjnano.10.2

• ], photocatalysts for rhodamine 6G dye degradation in aqueous solution [27] and were proposed as a thermal UV sensor for high-radiation environments [4]. Moreover, the ZTO materials were also employed as volatile organic compound (VOC) (such as methanol, ethanol or acetone vapors) sensors [28], as an anode for Li

• -ion microbatteries [29], as photocatalysts for brilliant green dye degradation in solution under solar light [30] and even as a component for supercapacitors [31]. The in situ synthesis of SnO2-based nanoparticles co-doped with F and Zn is demonstrated in this work. For this purpose we use the

Ag₂WO₄ nanorods decorated with AgI nanoparticles: Novel and efficient visible-light-driven photocatalysts for the degradation of water pollutants

• Shijie Li,
• Shiwei Hu,
• Wei Jiang,
• Yanping Liu,
• Yu Liu,
• Yingtang Zhou,
• Liuye Mo and
• Jianshe Liu

Beilstein J. Nanotechnol. 2018, 9, 1308–1316, doi:10.3762/bjnano.9.123

• photocatalytic performance for dye degradation under light irradiation [30][31][36][37]. Unfortunately, due to its wide bandgap of about 3.1 eV, Ag2WO4 has limited photocatalytic activity under sunlight, which severely limits its application and illustrates the urgency for optimization of Ag2WO4 to overcome

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

• Mengyuan Zhang,
• Jiaqian Qin,
• Pengfei Yu,
• Bing Zhang,
• Mingzhen Ma,
• Xinyu Zhang and
• Riping Liu

Beilstein J. Nanotechnol. 2018, 9, 789–800, doi:10.3762/bjnano.9.72

• NH4HCO3 can homogenize the constituent in a relatively smaller range of pH. By tuning the ratio of Zn/Bi, the morphology, which also plays a vital role in photocatalytic dye degradation, varied from nanoplates, to flowers to nanoparticles. The obtained ZnO/BiOI heterostructured nanocomposites showed a

Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications

• Suneel Kumar,
• Ashish Kumar,
• Ashish Bahuguna,
• Vipul Sharma and
• Venkata Krishnan

Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159

Enhanced catalytic activity without the use of an external light source using microwave-synthesized CuO nanopetals

• Govinda Lakhotiya,
• Sonal Bajaj,
• Arpan Kumar Nayak,
• Debabrata Pradhan,
• Pradip Tekade and
• Abhimanyu Rana

Beilstein J. Nanotechnol. 2017, 8, 1167–1173, doi:10.3762/bjnano.8.118

• same catalyst could still successfully degrade ≈94% of MB dye in 30 min. This highlights the efficacy and high stability of CuO nanopetals as a catalyst in this dye degradation activity. The phase and morphology of CuO nanopetals after the fifth cycle was also confirmed by XRD and FESEM (not shown

Optical and photocatalytic properties of TiO₂ nanoplumes

• Viviana Scuderi,
• Massimo Zimbone,
• Maria Miritello,
• Giuseppe Nicotra,
• Giuliana Impellizzeri and
• Vittorio Privitera

Beilstein J. Nanotechnol. 2017, 8, 190–195, doi:10.3762/bjnano.8.20

• nanoplumes studied by measuring dye degradation in water. Nanoplumes were synthesized by peroxide etching of Ti films with different thicknesses. Structural characterization was carried out by scanning electron microscopy and transmission electron microscopy. We investigated in detail the optical properties

Organoclay hybrid materials as precursors of porous ZnO/silica-clay heterostructures for photocatalytic applications

• Marwa Akkari,
• Pilar Aranda,
• Abdessalem Ben Haj Amara and
• Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2016, 7, 1971–1982, doi:10.3762/bjnano.7.188

• . The percentage of the dye degradation was defined as: degradation (%) = (C0 − C)/C0 × 100, where C0 is the initial concentration of MB and C is the residual concentration of MB at varying intervals of UV irradiation [35]. Scheme of the synthetic approach employed in the preparation of the ZnO/SiO2

Role of RGO support and irradiation source on the photocatalytic activity of CdS–ZnO semiconductor nanostructures

• Suneel Kumar,
• Rahul Sharma,
• Vipul Sharma,
• Gurunarayanan Harith,
• Vaidyanathan Sivakumar and
• Venkata Krishnan

Beilstein J. Nanotechnol. 2016, 7, 1684–1697, doi:10.3762/bjnano.7.161

• standard redox potential of •OH/OH− (2.38 eV vs NHE) and •OH/H2O (2.72 eV vs NHE), •OH cannot be generated by reacting with H2O molecules. The •OH radicals are responsible for the dye degradation into CO2 and H2O [68][69]. The enhanced photocatalytic activity of the RGO-supported CdS–ZnO nanocomposite

Characterization and photocatalytic study of tantalum oxide nanoparticles prepared by the hydrolysis of tantalum oxo-ethoxide Ta₈(μ₃-O)₂(μ-O)₈(μ-OEt)₆(OEt)₁₄

• Subia Ambreen,
• N D Pandey,
• Peter Mayer and
• Ashutosh Pandey

Beilstein J. Nanotechnol. 2014, 5, 1082–1090, doi:10.3762/bjnano.5.121

• increasing the amount of Ta2O5 from 0.2 mg/mL to 0.8 mg/mL, the photocatalytic degradation rate was enhanced due to increase in the active sites accessible for the reaction on the surface of the catalyst. However, when the amount of catalyst was increased further, the rate of dye degradation was found to be

Photocatalysis

• Rong Xu

Beilstein J. Nanotechnol. 2014, 5, 1071–1072, doi:10.3762/bjnano.5.119

• bismuth vanadium oxide cluster exemplifies these characteristics. Besides solar fuel production, photocatalysis has a long history in water treatment. In this Thematic Series, there is also a report on the latest development in the utilization of mesoporous cerium oxide for visible light-driven dye

• degradation. In recent years, the interest in photocatalytic organic conversion has risen, which is reflected by a report on photo-epoxidation. And last but not least, one of the studies of this Thematic Series aims for a fundamental understanding of the photophysical process by optical modeling. I am

Growth and characterization of CNT–TiO₂ heterostructures

• Yucheng Zhang,
• Ivo Utke,
• Johann Michler,
• Gabriele Ilari,
• Marta D. Rossell and
• Rolf Erni

Beilstein J. Nanotechnol. 2014, 5, 946–955, doi:10.3762/bjnano.5.108

• photocatalytic performance than the chemical bond between CNTs and TiO2, since the arc-discharge-synthesized CNTs show a dramatically higher photocatalytic dye degradation rate than the CVD-synthesized CNTs, which is attributed to the smaller number of defects in the multi-wall (MW) tubes of the former. In

Pyrite nanoparticles as a Fenton-like reagent for in situ remediation of organic pollutants

• Carolina Gil-Lozano,
• Elisabeth Losa-Adams,
• Alfonso F.-Dávila and
• Luis Gago-Duport

Beilstein J. Nanotechnol. 2014, 5, 855–864, doi:10.3762/bjnano.5.97

• the surface, the dye degradation efficiency is expected to increase with a greater surface area (i.e., smaller particles should give better results). We assessed this hypothesis by performing batch experiments to compare the degradation behavior of nanoparticles with that of microparticles (Figure 3

Visible light photooxidative performance of a high-nuclearity molecular bismuth vanadium oxide cluster

• Johannes Tucher and
• Carsten Streb

Beilstein J. Nanotechnol. 2014, 5, 711–716, doi:10.3762/bjnano.5.83

• . In these screening reactions it was found that 1 performs as an effective visible-light driven photooxidant for the degradation of indigo, see Figure 2. Photooxidative activity of 1 In detail, it was found that dye degradation under visible light irradiation (here: λ = 430 nm) is significantly

• enhanced by the presence of photocatalyst 1. After tirradiation = 80 min and under anaerobic conditions, virtually full dye degradation in the presence of 1 is observed ([Ind]/[Ind]0 < 3%), see Figure 2. In the absence of any photocatalyst, the dye concentration after an identical irradiation time is [Ind

• ]/[Ind]0 ca. 85%, illustrating the visible-light photooxidative activity of 1. Initial spectroscopic and gas chromatographic analyses suggest that dye degradation is only partial and no full mineralization leading to the formation of CO or CO2 was observed. Aerobic vs anaerobic photocatalytic activity of

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

• carbon nanodot–TiO2 nanotube [130], carbon nanodot–SrTiO3 film [131], carbon nanodot–TiO2 nanoparticle [114], and carbon nanodot–ZnO nanorod arrays [132], exhibited a good performance for photoelectrochemical water splitting or photocatalytic activity in dye degradation under visible light irradiation

Mesoporous cerium oxide nanospheres for the visible-light driven photocatalytic degradation of dyes

• Subas K. Muduli,
• Songling Wang,
• Shi Chen,
• Chin Fan Ng,
• Cheng Hon Alfred Huan,
• Tze Chien Sum and
• Han Sen Soo

Beilstein J. Nanotechnol. 2014, 5, 517–523, doi:10.3762/bjnano.5.60

• , suggesting that the mechanism of photocatalytic activity under visible-light irradiation involves predominantly hydroxyl radicals as the active species. Keywords: cerium oxide; dye degradation; mesoporous; photocatalysis; visible light; Introduction The degradation of organic pollutants by affordable and

• additional experimental data. Supporting Information File 58: Synthesis procedure, characterization, and dye degradation studies. Acknowledgements H. S. Soo is supported by a NTU start-up grant (M4081012) and the Nanyang Assistant Professorship (M4081154). T. C. Sum is supported by a NTU start-up grant