Designing robust anatase-branch@hydrogenated-rutile-nanorod TiO2 as accurate and sensitive photoelectrochemical sensors

Zu, Meng; Zheng, Mengting; Zhang, Shengsen; Xing, Chao; Ming, Zhou; Liu, Hu; Zhou, Xiaosong; Zhang, Shanqing

doi:10.1016/j.snb.2020.128504

Cited by 28 publications

(16 citation statements)

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“…As a result, the diffraction peaks of the samples in Fig. 1a concur with the reports of rutile and anatase TiO 2 crystals in the literature [7,26]. The microstructure and surface morphology of the asprepared nanocomposite were observed using field emission FEM (FESEM), with the results displayed in Fig.…”

Section: Materials Characterizationsupporting

confidence: 87%

“…S O +e SO +SO , To improve the performance of synergistic PC-PS degradation, designing and synthesizing highly efficient photocatalysts plays a critical role. In general, TiO 2 is the most commonly used photocatalyst material due to its appropriate band position, high chemical stability, low cost, and nontoxicity [7]. However, pristine TiO 2 photocatalysts can only be stimulated by UV irradiation because the bandgap of pristine TiO 2 is higher than 3.0 eV, which seriously impedes its utilization in low-cost and environmentally friendly solar energy applications [8].…”

Section: Introductionmentioning

confidence: 99%

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Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Zhang

Liu

et al. 2021

Sci. China Mater.

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Highly efficient, low-cost, and portable wastewater treatment and purification solutions are urgently needed for aqueous pollution removal, especially at remote sites. Synergistic photocatalytic (PC) and persulphate (PS) degradation under visible light offers an exceptional alternative for this purpose. In this work, we coupled a TiO 2-based PC system with a PS oxidation system into a portable advanced oxidation device for rapid and deep degradation of organic contaminants in wastewater. Using hydrogenation, we fabricated hydrogenated anatase branched-rutile TiO 2 nanorod (H-AB@RTNR) photocatalysts which enable the PC degradation to occur under visible light and improve the utilization of solar energy. We also discovered that the addition of PS resulted in the synergistic degradation of tenacious and persistent organics, dramatically improving the extent and kinetics of the degradation. A degradation rate of 100% and a reaction rate constant of 0.0221 min −1 for degrading 1 L rhodamine B (20 mg L −1) were achieved in 120 min in a specially designed thin-layer cell under visible light irradiation. The superior performance of the synergistic PC and PS degradation system was also demonstrated in the degradation of real industrial wastewater. Both remarkable performances can be attributed to the heterophase junction and oxygen vacancies in the photocatalyst that facilitate the catalytic conversion of PS anions into highly active radicals (•SO 4 − and •OH). This work suggests that the as-proposed synergistic degradation design is a promising solution for building a portable wastewater treatment system.

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Section: Materials Characterizationsupporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Zhang

Liu

et al. 2021

Sci. China Mater.

Self Cite

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“…CuO NWs photocathodes fabricated via hydrothermal method have also shown a photocurrent of ~1.4 mA cm -2 at 0 V vs. RHE under AM 1.5G irradiation, which is one of the highest photocurrents based on bare CuO photocathode [101]. Hydrogenated 1-D materials (Figure 8) have also been integrated in PEC cells for sensing applications [104][105][106][107]. For instance, Au-NiO1-x (0<x<1) hybrid NWs arrays are used as glucose sensors that exhibits an ultrahigh sensitivity of 4.061 mA cm -2 mM -1 , low detection limit and a wide level of glucose concentration in the detection range of 0.005-15 mM in PEC cells [104].…”

Section: Photochemical Cellsmentioning

confidence: 99%

“…In addition, TiO2 NWs prepared by template sol-gel synthesis are practical for a hydrazine photoelectrochemical sensor having a limit of detection (LOD) of 1.91 μM and a limit of quantification (LOQ) 8.91mM [105]. Nanorods such as highperformance anatase-branch@hydrogenated rutile-nanorod TiO2 have also been used for detecting chemical oxygen demand (COD) in wastewater [106]. Featuring a detection limit of 0.2 ppm and a wide linear detection range of 1.25−576 ppm [106].…”

Section: Photochemical Cellsmentioning

confidence: 99%

“…Nanorods such as highperformance anatase-branch@hydrogenated rutile-nanorod TiO2 have also been used for detecting chemical oxygen demand (COD) in wastewater [106]. Featuring a detection limit of 0.2 ppm and a wide linear detection range of 1.25−576 ppm [106]. A propyl gallate PEC sensor based on ZnO nanorods and MoS2 flakes showed a wide linear range from 1.25 10 −7 to 1.47 10 −3 mol L −1 with a detection limit as low as 1.2 10 −8 mol L −1 [107].…”

Section: Photochemical Cellsmentioning

confidence: 99%

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One-dimensional (1D) Nanostructured Materials for Energy Applications

Machín¹,

Fontánez²,

Arango³

et al. 2021

Preprint

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At present, the world is at the peak of production of traditional fossil fuels. Much of the resources that humanity has been consuming (oil, coal and natural gas) are coming to an end. The human being faces a future that must necessarily go through a paradigm shift, which includes a progressive movement towards increasingly less polluting and energetically viable resources. In this sense, nanotechnology has a transcendental role in this change. For decades, new materials capable of being used in energy processes have been synthesized that undoubtedly will be the cornerstone of the future development of the planet. In this review, we report on the current progress in the synthesis and use of one-dimensional (1D) nanostructured materials (specifically nanowires, nanofibers, nanotubes and nanorods), with compositions based on oxides, nitrides, or metals, for applications related to energy. Due to its extraordinary surface-volume relationship, tunable thermal and transport properties, and its high surface area, these 1D nanostructures have become fundamental elements for the development of energy processes. The most relevant 1D nanomaterials, their different synthesis procedures, and useful methods for assembling 1D nanostructures in functional devices will be presented. Applications in relevant topics such as optoelectronic and photochemical devices, hydrogen production or energy storage, among others, will be discussed. The present review concludes with a forecast on the directions towards which future research could be directed on this class of nanostructured materials.

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In Situ Photoelectrodeposited Polyaniline on Ti‐Doping Hematite For Highly Selective Photoelectrochemical Oxygen Demand Determination

Li,

Tang,

Xiao

et al. 2024

Adv Funct Materials

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Chemical Oxygen Demand (COD), as a detection indicator of water pollution, is of particular importance in assessing organic pollution in water. Furthermore, accurate and simple measuring COD methods are essential for water quality assessment and pollution control. However, the photoelectrochemical oxygen demand (PECOD) measurement, as one of the measuring COD methods, is affected by the reaction of water splitting, which is one of the hindrances to the commercialization of the analytical method of the PeCOD measurement. Hence, to overcome this challenge, a new PANI/Ti:Fe2O3 photoanode is constructed by hydrothermal and photoelectrochemical (PEC) deposition methods and investigated their optical properties and photoactivity. Under optimization conditions, it is discovered that the oxidation of organic compounds produces a net steady‐state current (inet) is directly proportional to COD concentration, with a detection limit of 1 mM glucose solution and a wide linear detection range of 1–78.125 mM, which is suitable for high concentration of glucose detection. As has been noted, PANI/Ti:Fe2O3 photoanode overcomes the obstacles to the practical application and eventual commercialization of the PECOD technology.

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Designing robust anatase-branch@hydrogenated-rutile-nanorod TiO2 as accurate and sensitive photoelectrochemical sensors

Cited by 28 publications

References 50 publications

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

Portable wastewater treatment system based on synergistic photocatalytic and persulphate degradation under visible light

One-dimensional (1D) Nanostructured Materials for Energy Applications

In Situ Photoelectrodeposited Polyaniline on Ti‐Doping Hematite For Highly Selective Photoelectrochemical Oxygen Demand Determination

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