Visible light photoelectrochemical properties of a hydrogenated TiO<sub>2</sub> nanorod film and its application in the detection of chemical oxygen demand

Wang, Xiu‐Jie; Zhang, Shengsen; Wang, Hongjuan; Li, Yuhang; Wang, Haihui; Zhang, Shanqing

doi:10.1039/c5ra15923g

Cited by 22 publications

(15 citation statements)

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“…Much higher photocatalytic activities in generating H 2 from water-methanol solution and decomposing methylene blue and phenol were reported in the hydrogenated black TiO 2 nanoparticles [87]. Similar conclusions have been drawn in other following studies for black TiO 2 nanomaterials [102][103][104][108][109][110]121,[142][143][144][145][146]. For example, excellent efficiencies were reported for the nanoporous black TiO 2 in photocatalytic degradation of phenol, reactive black 5, rhodamine B, and methylene blue [103].…”

Section: Photocatalysissupporting

confidence: 81%

Synthesis, properties, and applications of black titanium dioxide nanomaterials

et al. 2017

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Dendrimer/inorganic nanomaterial composites: Tailoring preparation, properties, functions, and applications of inorganic nanomaterials with dendritic architectures SCIENCE CHINA Chemistry 54, 286 (2011); Chiral metal-containing ionic liquid: Synthesis and applications in the enantioselective cycloaddition of carbon dioxide to epoxides SCIENCE CHINA Chemistry 54, 1044 (2011); Carbon-coated manganese dioxide nanoparticles and their enhanced electrochemical properties for zinc-ion battery applications

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Section: Photocatalysissupporting

confidence: 81%

Synthesis, properties, and applications of black titanium dioxide nanomaterials

et al. 2017

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“…[ 136,143,144 ] For example, the hydrogenated TiO 2 nanorod arrays (H-TNRs) showed a highly sensitive and steady photocurrent response (about 100 times larger than the pristine TNR) in the NaNO 3 solution under visible light ( Figure 33 a). The hydrogenated black TiO 2 nanorod or nanotube arrays obtained by H 2 annealling treatment were applied as a photoelectrochemical sensor for organic compounds under visible light.…”

Section: Photoelectrochemical Sensorsmentioning

confidence: 99%

“…Titania can be used as a photochemical sensor to quantify the organics in an aqueous phase by measuring the photocurrents originated from the degradation process in PEC cells. The hydrogenated black TiO 2 nanorod or nanotube arrays obtained by H 2 annealling treatment were applied as a photoelectrochemical sensor for organic compounds under visible light . For example, the hydrogenated TiO 2 nanorod arrays (H‐TNRs) showed a highly sensitive and steady photocurrent response (about 100 times larger than the pristine TNR) in the NaNO 3 solution under visible light ( Figure 33 a) .…”

Section: Photocatalytic Performances Of Black Titaniamentioning

confidence: 99%

Progress in Black Titania: A New Material for Advanced Photocatalysis

Liu

Zhu

Wang

et al. 2016

Advanced Energy Materials

288

190

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excited charges should separate from each other and migrate to the surface to perform photocatalytic reactions, before they are annihilated in the recombination process. [ 3,17,18 ] Nevertheless, TiO 2 has a wide bandgap of 3.0−3.2 eV for the three common natural polymorphs -anatase, rutile and brookite. [ 8 ] That limits the optical absorption of TiO 2 in the ultraviolet (UV) region of the solar spectrum, resulting in insuffi cient utilization of solar energy (less than 5%). Another hurdle for TiO 2 material in the photo-chemical applications is its low quantum effi ciency that results from its high recombination of photo-generated electron-hole pairs. [ 16,18 ] Therefore, improving the optical absorption properties and reducing electron-hole recombination of TiO 2 are expected to be signifi cant for superior photoactivity.Various strategies have been adopted to tune TiO 2 's optical and electronic properties to improve its visible-light photoactivity. For example, metal ions (Co, Ni, Mn, Fe, Cr, …) or non-metal ions (N, S, C, I, …) are doped in the titania matrix to induce mid-gap states or to narrow the bandgap of TiO 2 , aiming to enhance its visible-light response. [ 3,17 ] Doping with open-shell metals is claimed to be benefi cial for red-shifting TiO 2 photochemistry into the visible, while closed shell cation dopants have no photochemical benefi t. Some d -block transition metal doping often generates deeply localized d -states in the forbidden bandgap of TiO 2 and results in recombination centers for carriers. [ 3,19 ] For the incorporation of non-metal ions, heavy doping is always diffi cult due to the large differences in chemistry between the alien ions and O 2− in titania, thus the visible light absorption is not signifi cantly enhanced. [ 20 ] Dye-sensitized or noble metal nanodots decorated TiO 2 nanostructures have been largely designed to enhanced its optical properties and to improve the charge separation effi ciency. [ 6,9,15,17,21 ] Additionally, charge separation in TiO 2 is believed to be effi ciently improved by forming heterojunctions with other semiconductors, such as metal oxides and chalcogenides. [ 6,22 ] In 2011, a hydrogenated black titania with a narrowed bandgap of ≈1.5 eV was reported to boost the full spectrum sunlight absorption and the photocatalytic activity. [ 23 ] This discovery has triggered world-wide scientifi c interests in black TiO 2 nanomaterials. [ 8 ] Black TiO 2 is featured by selfstructural modifi cations, involving self-doped Ti 3+ /oxygen vacancy, or incorporation of H-doping. [ 5,8 ] Owing to these modifi cations, their crystal and electronic structures as well as the surface property are signifi cantly changed, and the most marked effect is the color changing. The intrinsic TiO 2The photocatalytic activity of TiO 2 has aroused a broad range of research effort since 1972. Although TiO 2 has a very high effi ciency in utilizing ultraviolet light, its overall solar activity is very limited due to its wide bandgap (≈3.0−3.2 eV). This is a bottleneck for TiO 2 to...

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“…The TiO 2 + BSA survey spectrum ( Figure 5 a) demonstrates increased binding energy for the N 1s and C 1s signals compared to the alendronate-functionalized surfaces, which may be due to the chemical composition of albumin. The O 1s spectrum in Figure 5 b contains the OH (531.8 eV) and Ti–O (529.9 eV) [ 45 ] peaks for the titanium bonds. The three contributions present for the C 1s spectrum ( Figure 5 c) are all related to the albumin functionalization.…”

Section: Resultsmentioning

confidence: 99%

Biofunctionalization of titanium surfaces with alendronate and albumin modulates osteoblast performance

Albano

Gomes

Feltran

et al. 2020

Heliyon

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Background Biofunctionalization of titanium surfaces can improve host responses, especially considering the time for osteointegration and patient recovery. This prompted us to modify titanium surfaces with alendronate and albumin and to investigate the behavior of osteoblasts on these surfaces. Methods The biofunctionalization of titanium surfaces was characterized using classical physicochemical approaches and later used to challenge pre-osteoblast cells up to 24 h. Then their viability and molecular behavior were investigated using mitochondrial dehydrogenase activity and RTq-PCR technologies, respectively. Potential stimulus of extracellular remodeling was also investigated by zymography. Results Our data indicates a differential behavior of cells responding to the surfaces, considering the activity of mitochondrial dehydrogenases. Molecularly, the differential expression of genes related with cell adhesion highlighted the importance of Integrin-β1 , Fak, and Src . These 3 genes were significantly decreased in response to titanium surfaces modified with alendronate, but this behavior was reverted when alendronate was associated with albumin. Alendronate-modified surfaces promoted a significant increase on ECM remodeling, as well as culminating with greater gene activity related to the osteogenic phenotype ( Runx2 , Alp , Bsp ). Conclusion Altogether, our study found interesting osteogenic behavior of cells in response to alendronate and albumin surfaces, which indicates the need for in vivo analyses to better consider these surfaces before clinical trials within the biomedical field.

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Visible light photoelectrochemical properties of a hydrogenated TiO₂ nanorod film and its application in the detection of chemical oxygen demand

Abstract: Hydrogenated TiO2 nanorod arrays as a photoelectrochemical sensor exhibit good stability and reproducibility for online COD monitoring using visible light.

Cited by 22 publications

References 38 publications

Synthesis, properties, and applications of black titanium dioxide nanomaterials

Synthesis, properties, and applications of black titanium dioxide nanomaterials

Progress in Black Titania: A New Material for Advanced Photocatalysis

Biofunctionalization of titanium surfaces with alendronate and albumin modulates osteoblast performance

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Visible light photoelectrochemical properties of a hydrogenated TiO2 nanorod film and its application in the detection of chemical oxygen demand

Abstract: Hydrogenated TiO2 nanorod arrays as a photoelectrochemical sensor exhibit good stability and reproducibility for online COD monitoring using visible light.

Cited by 22 publications

References 38 publications

Synthesis, properties, and applications of black titanium dioxide nanomaterials

Synthesis, properties, and applications of black titanium dioxide nanomaterials

Progress in Black Titania: A New Material for Advanced Photocatalysis

Biofunctionalization of titanium surfaces with alendronate and albumin modulates osteoblast performance

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Product

Resources

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Visible light photoelectrochemical properties of a hydrogenated TiO₂ nanorod film and its application in the detection of chemical oxygen demand