Preparation and Electrochemical Properties of Flow-Through TiO&lt;sub&gt;2&lt;/sub&gt; Nanoarray

Xie, Yi

doi:10.4028/www.scientific.net/jnanor.65.1

Cited by 15 publications

(4 citation statements)

References 35 publications

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“…According to CV curves, the specific capacitance of TiO 2 NTA can be calculated using the following Equation 36 .

C_{s} = i / υ = true[((), \int \begin{matrix} center \\ V_{c} \\ V_{a} \end{matrix} i ((), υ) * normald υ) / ((), V_{c} - V_{a}) / υ = ([], \frac{1}{2} ((), \int i ((), v) * italicdν) / normalΔ V) / ν

where C s and υ denote specific capacitance (mF cm −2 ) and the potential sweep rate (mV s −1 ); V a and V c represent the lowest and highest voltage (mV) 22,30,37 . Figure 3c shows corresponding capacity curve of TiO 2 NTA in terms of scan rates and response currents.…”

Section: Resultsmentioning

confidence: 99%

“…TiO 2 NTA was synthesized by a controlled anodization process in two‐electrode system in ammonium fluoride electrolyte solution, which involves titanium sheet as the working electrode and a platinum sheet as the counter electrode. The anodization voltage, electrolyte concentration, pH value, water, and ethylene glycol solvent content were adjusted to form the tubewall‐connected and tubewall‐separated structures 30 . The ultrasonic‐assisted stirring is introduced to promote sufficient electrolyte ion diffusion and accordingly intensify the anodization reaction and etching dissolution reaction 32 .…”

Section: Methodsmentioning

confidence: 99%

“…Such a confined microstructure restrains electrolyte ion and reactant diffusion which accordingly affects the photoelectrochemical activity in the photocatalysis and photoelectrocatalysis process. The independent nanotube structure is expected to provide extra interspace and accordingly promote photoelectrochemical activity 28–30 , 31 . The microstructure tailored TiO 2 NTA becomes quite suitable for photocatalysis degradation of organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

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Photoelectrochemical performance of tubewall‐separated titanium dioxide nanotube array photoelectrode

Xie

2021

Asia-Pacific J Chem Eng

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Titanium dioxide nanotube array (TiO2 NTA) grown on titanium substrate has been fabricated as active photoelectrode for organic compound degradation. TiO2 NTA shows the tubewall‐separated nanotube arrangement and anatase crystal structure. Transient photocurrent of 1.86 mA and open‐circuit photovoltage of 0.26 V are determined to keep stable level under ultraviolet (UV) light irradiation, indicating its high photoelectrochemical activity. The cathodic polarization process causes more feasible electron transfer than the equilibrium process and anodic polarization process, which is consistent with the declining current response at an increasing positive potential. The photocatalytic activity of TiO2 NTA is fully evaluated through UV light‐induced photocatalysis and photoelectrocatalysis degradation of organic dye X‐3B as a reactant pollutant. The pseudo‐first‐order reaction rate constant is enhanced from 0.00346 min−1 for photocatalysis to 0.00521 min−1 for photoelectrocatalysis using Langmuir–Hinshelwood kinetic model of heterogeneous catalysis. The tubewall‐separated nanotube structure could induce photoelectron directional transport and provide extra interspace for reactant organic molecule diffusion at accessible surface area. The positive potential applied on TiO2 NTA could further promote photoelectron–hole pair separation. Two strategies of photoelectron generation and photoelectron–hole separation are accordingly adopted to improve its electro‐assisted photocatalytic activity. Therefore, the tubewall‐separated TiO2 NTA could present the promising photoelectrocatalysis application.

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“…According to CV curves, the specific capacitance of TiO 2 NTA can be calculated using the following Equation 36 .

C_{s} = i / υ = true[((), \int \begin{matrix} center \\ V_{c} \\ V_{a} \end{matrix} i ((), υ) * normald υ) / ((), V_{c} - V_{a}) / υ = ([], \frac{1}{2} ((), \int i ((), v) * italicdν) / normalΔ V) / ν

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photoelectrochemical performance of tubewall‐separated titanium dioxide nanotube array photoelectrode

Xie

2021

Asia-Pacific J Chem Eng

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“…The carbon electrode material shows outstanding chemical stability which has excellent acid and alkali resistance and oxidation resistance for electrochemical applications [19]. Porous carbon materials are applied for supercapacitor electrodes, keeping excellent cyclic stability and good resistance to electrochemical corrosion [20][21][22]. These porous carbon materials mainly reveal the electrical double-layer capacitance behaviour with the limited areal specific capacitance which is restricted by the active electrode surface area and the pore size distribution [23].…”

Section: Introductionmentioning

confidence: 99%

Preparation and electrochemical performance of chemical‐activated carbon foam

Bao

Xie

et al. 2020

Micro & Nano Letters

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Three‐dimensional porous carbon foam is fabricated by thermal pyrolysis of melamine foam and applied for energy storage electrode material. The increase of carbonization temperature is beneficial to improving graphitization degree and meanwhile lowing mechanical stability of carbon foam. KOH and Ni(NO3)2‐activated carbonization is applied to further improve graphitization of carbon foam, leading to the improved conductivity. The ohmic resistance declines from 305 Ω cm–1 for bare carbon foam to 198 Ω cm–1 for KOH‐activated one and 58 Ω cm–1 for Ni(NO3)2‐activated one. The specific capacitance increases from 0.371 mF cm–2 for bare carbon foam to 0.905 mF cm–2 for KOH‐activated one and 1.267 mF cm–2 for Ni(NO3)2‐activated one at the current density of 0.1 mA cm–2. The activation thermal carbonization can improve the electroactivity of carbon foam. The fractured framework lowers mechanical stability of the chemical‐activated carbon foams. Ni(NO3)2‐activated carbon foam shows higher graphitization degree and electrical conductivity than KOH‐activated one, accordingly contributing to higher electrochemical capacitance and rate capability. Ni(NO3)2‐activation become more effective to enhance graphitization degree of carbon foam.

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Experimental and computational investigation of Cu–N coordination bond strengthened polyaniline for stable energy storage

Xie

Chen

2021

J Mater Sci

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Preparation and Electrochemical Properties of Flow-Through TiO<sub>2</sub> Nanoarray

Cited by 15 publications

References 35 publications

Photoelectrochemical performance of tubewall‐separated titanium dioxide nanotube array photoelectrode

Photoelectrochemical performance of tubewall‐separated titanium dioxide nanotube array photoelectrode

Preparation and electrochemical performance of chemical‐activated carbon foam

Experimental and computational investigation of Cu–N coordination bond strengthened polyaniline for stable energy storage

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