Photoelectrochemical water oxidation over TiO₂ nanotubes modified with MoS₂ and g-C₃N₄

• Phuong Hoang Nguyen,
• Thi Minh Cao,
• Tho Truong Nguyen,
• Hien Duy Tong and
• Viet Van Pham

Beilstein J. Nanotechnol. 2022, 13, 1541–1550, doi:10.3762/bjnano.13.127

• Province, Vietnam 10.3762/bjnano.13.127 Abstract TiO2 nanotube arrays (TNAs) have been studied for photoelectrochemical (PEC) water splitting. However, there are two major barriers of TNAs, including a low photo-response and the fast charge carrier recombination in TNAs, leading to poor photocatalytic

• semiconductors, TiO2 nanotube arrays (TNAs) of 2–100 nm in diameter and 1–2 μm in length, are often used for efficient PEC applications exploiting advantages such as chemical stability, less toxicity and suitable cost [18][19][20][21]. However, there are two disadvantages affecting directly their photocatalytic

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

Hierarchical Bi₂WO₆/TiO₂-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants

• Zehao Lin,
• Zhan Yang and
• Jianguo Huang

Beilstein J. Nanotechnol. 2022, 13, 745–762, doi:10.3762/bjnano.13.66

• Zehao Lin Zhan Yang Jianguo Huang Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, P. R. China Shenzhen Middle School, Shenzhen, Guangdong 518001, P. R. China 10.3762/bjnano.13.66 Abstract A series of Bi2WO6/TiO2-nanotube (Bi2WO6/TiO2-NT) heterostructured composites were

• of 15, 25, 40 and 60 nm, and the densities of uniform Bi2WO6 nanoparticles on the TiO2 nanotubes also increase. As a comparison, the pure TiO2-NT sample retains the three-dimensional network structure of natural cellulose, and the TiO2 nanotube has a tube diameter of 100 nm and a thickness of 5 nm

• the Bi2WO6/TiO2-NT nanocomposites. The detailed mechanism was revealed in the hierarchical Ag2O-nanoparticle/TiO2-nanotube composite reported by our group [31]. As shown in Figure 4a, the HR-TEM image of the 70%−Bi2WO6/TiO2-NT nanocomposite shows two kinds of lattice fringes with interplanar spacings

Engineered titania nanomaterials in advanced clinical applications

• Padmavati Sahare,
• Paulina Govea Alvarez,
• Juan Manual Sanchez Yanez,
• Gabriel Luna-Bárcenas,
• Samik Chakraborty,
• Sujay Paul and
• Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

• integrin clustering and focal adhesion development. In this context, Chen et al. employed the adsorption of functional proteins (bone morphogenetic protein 2 and sclerostin antibody) to modify TiO2 nanotube arrays to repair bone fractures [35]. The PC alters biodistribution, biological identity and

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

• , vol. 215, by Huy, T. H.; Bui, D. P.; Kang, F.; Wang, Y. F.; Liu, S. H.; Thi, C. M.; You, S. J.; Chang, G. M.; Pham, V. V. “SnO2/TiO2 nanotube heterojunction: The first investigation of NO degradation by visible-light-driven photocatalysis”, pages 323–332, Copyright (2018), with permission from

Highly sensitive detection of estradiol by a SERS sensor based on TiO₂ covered with gold nanoparticles

• Andrea Brognara,
• Ili F. Mohamad Ali Nasri,
• Beatrice R. Bricchi,
• Andrea Li Bassi,
• Caroline Gauchotte-Lindsay,
• Matteo Ghidelli and
• Nathalie Lidgi-Guigui

Beilstein J. Nanotechnol. 2020, 11, 1026–1035, doi:10.3762/bjnano.11.87

• soaking in HAuCl4 solution, as composite SERS substrates for the detection of methylene blue. They reported a successful SERS enhancement, compared to bare Si substrates, with an enhancement factor of ca. 106 and a lower detection limit of 100 nM. Li et al. [15] studied Au NP-coated TiO2 nanotube arrays

Effect of Ag loading position on the photocatalytic performance of TiO₂ nanocolumn arrays

• Jinghan Xu,
• Yanqi Liu and
• Yan Zhao

Beilstein J. Nanotechnol. 2020, 11, 717–728, doi:10.3762/bjnano.11.59

• photolithography and the template method by Sung et al. [30]. In this case, Ag particles were loaded on the outside of the nanocolumns by magnetron sputtering, and the catalysis was carried out at a sputtering time of 30 min. Besides, Jani et al. [31] studied the preparation of TiO2 nanotube arrays by anodization

Uniform Sb₂S₃ optical coatings by chemical spray method

• Jako S. Eensalu,
• Atanas Katerski,
• Erki Kärber,
• Ilona Oja Acik,
• Arvo Mere and
• Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 198–210, doi:10.3762/bjnano.10.18

• –Weber island growth of amorphous Sb2S3 (and in some cases leaf-like grains of polycrystalline Sb2S3) have been observed in Sb2S3 layers grown by chemical bath deposition on glass [47][48], In2O3/Sn (ITO) [49], planar TiO2 [16] and TiO2 nanotube arrays [50], by sequential deposition [51] and spin coating

Amorphous Ni_xCo_yP-supported TiO₂ nanotube arrays as an efficient hydrogen evolution reaction electrocatalyst in acidic solution

• Yong Li,
• Peng Yang,
• Bin Wang and
• Zhongqing Liu

Beilstein J. Nanotechnol. 2019, 10, 62–70, doi:10.3762/bjnano.10.6

• attention due to their synergistic effect for improving the hydrogen evolution reaction as compared to monometallic phosphides. In this work, NiCoP modified hybrid electrodes were fabricated by a one-step electrodeposition process with TiO2 nanotube arrays (TNAs) as a carrier. X-ray diffraction

• unstable under acidic conditions. One effective way to improve their stability is with an appropriate support material. Compared to the nickel foam or other substrates [19][23][24], TiO2 nanotube arrays prepared by anodization are favorable for the loading of catalysts and the fast transfer of electrons

• aqueous solution, the NixCoyP/TNAs electrodes presented enhanced electrocatalytic activity and robust stability after incorporating Co into NiP. Experimental Preparation of NixCoyP/TNA electrodes The TiO2 nanotube arrays used here were prepared using an electrochemical anodization technique according to

A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO₂ nanotubes with a hydrophobic layer

• Caihong Liang,
• Jiang Wen and
• Xiaoming Liao

Beilstein J. Nanotechnol. 2018, 9, 1793–1801, doi:10.3762/bjnano.9.170

• light by doping AuNPs onto the nanotubes to improve the photocatalysis of the TNTs, which feasibly allows drug release under visible light. However, controlled drug release in combination with extended release delivery via a TiO2 nanotube platform has been rarely investigated. As a trace element

• the oxygen atoms of ZnO. Figure 5 demonstrates the water contact angles (CAs) of the different treated samples. As-grown TiO2 nanotube arrays presents total hydrophilicity with a water CA of 30° (Figure 5a) without any surficial alteration [2][3]. Besides, TNTs modified with Ag (Figure 5b) and ZnO-Ag

• nanotubes and can subsequently accelerate the process of drug release. Song et al. [14] detected the influence of illumination intensity on the release properties of the amphiphilic and the normal TiO2 nanotube layers using the model drug horseradish peroxide (HRP). They also detected the influence of light

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

• photocatalytic reduction of Cr(VI) was investigated by Qin et al. [166]. Zhong and co-workers fabricated Cu-decorated TiO2 nanotube photoelectrodes by a facile hydrothermal method. The optoelectronic coupling between Cu nanoparticles and TiO2 nanotubes enhanced the rate of transfer of electrons and subsequently

• photocatalytic degradation of pollutants under visible light irradiation. Yang et al. reported that the photoreduction of Cr(VI) by WO3-doped TiO2 nanotube (NT) arrays was found to be greater than that of neat TiO2 NT arrays [159]. This is because the incorporation of WO3 with TiO2 facilitates the separation of

Review on optofluidic microreactors for artificial photosynthesis

• Xiaowen Huang,
• Jianchun Wang,
• Tenghao Li,
• Jianmei Wang,
• Min Xu,
• Weixing Yu,
• Abdel El Abed and
• Xuming Zhang

Beilstein J. Nanotechnol. 2018, 9, 30–41, doi:10.3762/bjnano.9.5

• splitting and CO2 reduction [80], but significant progress had already been made before it was combined with the optofluidics [81]. Park et al. developed CdS quantum-dot-sensitized TiO2 nanotube arrays for the photo-regeneration of nicotinamide cofactors [82]. They also used SiO2-supported CdS quantum dots

Nano- and microstructured materials for in vitro studies of the physiology of vascular cells

• Alexandra M. Greiner,
• Adria Sales,
• Hao Chen,
• Sarah A. Biela,
• Dieter Kaufmann and
• Ralf Kemkemer

Beilstein J. Nanotechnol. 2016, 7, 1620–1641, doi:10.3762/bjnano.7.155

• the feature geometry and size. Some studies reported that proliferation of SMCs was negatively affected by PDMS microgrooves [204][205] and titanium oxide (TiO2) nanotube surfaces [31]. However, nanopits positively regulated SMC proliferation and gene expression [30]. In other studies, human SMCs from

• regulated their gene expression [197]. On titanium oxide (TiO2) nanotube surfaces, vascular SMCs expressed more SMC α-actin (a marker of differentiation) [129]. YAP/TAZ (Yes-associated protein/transcriptional coactivator with PDZ-binding motif) is a protein complex that induces the expression of

Fast diffusion of silver in TiO₂ nanotube arrays

• Wanggang Zhang,
• Yiming Liu,
• Diaoyu Zhou,
• Hui Wang,
• Wei Liang and
• Fuqian Yang

Beilstein J. Nanotechnol. 2016, 7, 1129–1140, doi:10.3762/bjnano.7.105

• the outmost surface of TiO2 nanotubes. Probably there are hardly any Ag nanocrystals formed inside the TiO2 nanotubes through the migration of Ag. Keywords: activation energy; fast diffusion; magnetron sputtering; silver; TiO2 nanotube; Introduction Titanium dioxide (TiO2) has gained great attention

• -dimensional structures. To increase the electric performance of TiO2, TiO2-based materials have been developed by incorporating metal nanoparticles in TiO2 nanotube arrays, using electrochemical deposition [21], irradiation of microwave [22], reduction [23], and sol–gel process [24], which involve the use of

• aqueous solutions. In addition, the technique of magnetron sputtering has been used to deposit Ag nanostructures on the surface of TiO2 nanotube arrays. It is worth mentioning that Enachi et al. [25] heat-treated the TiO2 nanotube arrays after the deposition of Ag film of 50 nm on the top surface of TiO2

Influence of wide band gap oxide substrates on the photoelectrochemical properties and structural disorder of CdS nanoparticles grown by the successive ionic layer adsorption and reaction (SILAR) method

• Mikalai V. Malashchonak,
• Alexander V. Mazanik,
• Olga V. Korolik,
• Еugene А. Streltsov and
• Anatoly I. Kulak

Beilstein J. Nanotechnol. 2015, 6, 2252–2262, doi:10.3762/bjnano.6.231

• 105 ± 12 m2/g for ZnO. The specific surface area estimated from SEM images for the TiO2 nanotube array is about 20 m2/g. X-ray diffraction (XRD) analysis demonstrates that In2O3, ZnO, and TiO2 crystallize in the cubic, hexagonal, and anatase modifications, respectively, after the heat treatment

• for the different WBGOs (Figure 2d). Particularly, for TiO2/CdS, the maximum is shifted towards larger N, and the IPCE values obtained are smaller as compared with the ZnO/CdS and In2O3/CdS heterostructures. This result can be attributed to the fact that the specific area of the TiO2 nanotube array is

Photocatalysis

• Rong Xu

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

• dots integrated with TiO2 nanotube arrays, and carbon nitride, have been explored to construct photocatalysts with enhanced performances. On the other hand, molecular catalysts have an advantage in design flexibility and structural tunability. A contribution based on the investigation of molecular

Optical modeling-assisted characterization of dye-sensitized solar cells using TiO₂ nanotube arrays as photoanodes

• Jung-Ho Yun,
• Il Ku Kim,
• Yun Hau Ng,
• Lianzhou Wang and
• Rose Amal

Beilstein J. Nanotechnol. 2014, 5, 895–902, doi:10.3762/bjnano.5.102

• , University of New South Wales, Kensington NSW 2052, Australia 10.3762/bjnano.5.102 Abstract Photovoltaic characteristics of dye-sensitized solar cells (DSSCs) using TiO2 nanotube (TNT) arrays as photoanodes were investigated. The TNT arrays were 3.3, 11.5, and 20.6 μm long with the pore diameters of 50

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

• CdSe to TiO2 via oxygen vacancy states mediated by N-doping [39][40]. There are also a large number of heterostructures in literature consisting of quantum dots and transition metal oxides, for instance, CdS/CdSe co-sensitized TiO2 [41], CdTe or CdTe/CdSe quantum dots on TiO2 nanotube arrays [42][43

• example, Zhang and co-workers have investigated the influence of different sizes of gold nanoparticles on the performance of the composite Au/TiO2 nanotube photonic crystal (NTPC) photocatalysts [72]. As described in Figure 6, a variable photocurrent density can be obtained if the TiO2 NTPC is modified

• nanoparticles–Fe2O3 [69][82][83], gold nanoparticle–ZnO nanorods [68], gold nanorod–TiO2 [70][71][84], gold nanoparticles–TiO2 nanotube [66][72]. For more details, readers may refer to recent excellent reviews for basic principle and detailed effects of localized surface plasmons on transition metal oxides [85

A visible-light-driven composite photocatalyst of TiO₂ nanotube arrays and graphene quantum dots

• Donald K. L. Chan,
• Po Ling Cheung and
• Jimmy C. Yu

Beilstein J. Nanotechnol. 2014, 5, 689–695, doi:10.3762/bjnano.5.81

• Donald K. L. Chan Po Ling Cheung Jimmy C. Yu Department of Chemistry and Shenzhen Research Institute, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China 10.3762/bjnano.5.81 Abstract TiO2 nanotube arrays are well-known efficient UV-driven photocatalysts. The

• incorporation of graphene quantum dots could extend the photo-response of the nanotubes to the visible-light range. Graphene quantum dot-sensitized TiO2 nanotube arrays were synthesized by covalently coupling these two materials. The product was characterized by Fourier-transform infrared spectrometry (FTIR

• light irradiation. Keywords: anodic oxidation; graphene quantum dots; photocatalyst; photodegradation; TiO2 nanotube arrays; Introduction Semiconductor-mediated photocatalysis is a promising technique for the conversion of solar energy as well as degradation of organic pollutants in air and water [1