Separable and recyclable meso-carbon@TiO2/carbon fiber composites for visible-light photocatalysis and photoelectrocatalysis

Chen, Hua-Jun; Yang, Yanling; Hong, Min; Chen, Jingeng; Suo, Guoquan; Hou, Xiaojiang; Feng, Lei; Chen, Zhigang

doi:10.1016/j.susmat.2019.e00105

Cited by 17 publications

(12 citation statements)

References 87 publications

(77 reference statements)

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“…Unfortunately, specific surface areas of photocatalyst coatings are limited, leading to decreased photocatalytic degradation efficiency. 38 To increase the surface-active sites of photocatalysts and design photocatalyst for commercilization, it is desirable to fabricate photocatalysts that are immobilized on different solid substrates. Constructing more porous channels in photocatalysts can enable photo-generated electrons and holes to transfer from the inside to the surface and result in high photocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Flexible Carbon-Fiber/Semimetal Bi Nanosheet Arrays as Separable and Recyclable Plasmonic Photocatalysts and Photoelectrocatalysts

Yang

Chen

Zou

et al. 2020

ACS Appl. Mater. Interfaces

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165

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In this work, we prepared flexible carbon-fiber/semimetal Bi nanosheet arrays from solvothermalsynthesized carbon-fiber/Bi 2 O 2 CO 3 nanosheet arrays via a reductive calcination process. The flexible carbon-fiber/semimetal Bi nanosheet arrays can function as photocatalysts and photoelectrocatalysts for 2,4-dinitorphenol oxidation. Comparing with carbon-fiber/Bi 2 O 2 CO 3 nanosheet arrays, the newly designed flexible carbon-fiber/semimetal Bi nanosheet arrays show enhanced ultraviolet-visible (UV-vis) light absorption efficiency, photocurrent, photocatalytic and photoelectrocatalytic activities. Photocatalytic analyses indicate that the surface plasmon resonance (SPR) of semimetal Bi occurs under solar-simulated light irradiation during photocatalytic process. The carbon fiber traps the hot electrons exerted from the SPR of semimetal Bi and creates holes in the semimetal Bi nanosheets, which boosts photocatalytic activity of the carbon fiber through plasmonic sensitization. Both photocatalytic experiments and density functional theory (DFT) calculations indicate that the electrons transferred to carbon fiber and the holes created in semimetal Bi contribute to the formation of and •OH, O 2 respectively. The synergistic effect between electrocatalysis and photocatalysis under the solar-simulated light results in almost complete degradation of 2,4-dinitorphenol during the photoelectrocatalytic process.This work realizes a non-noble-metal plasmonic catalyst and provides a new avenue for the commercializaiton of photocatalysis and photoelectrocatalysis using the separable and recyclable carbonfiber/semimetal Bi nanosheet arrays in the environment-related field.

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Section: Introductionmentioning

confidence: 99%

Flexible Carbon-Fiber/Semimetal Bi Nanosheet Arrays as Separable and Recyclable Plasmonic Photocatalysts and Photoelectrocatalysts

Yang

Chen

Zou

et al. 2020

ACS Appl. Mater. Interfaces

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165

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“…The photocatalytic reactions generating the (super)oxidative (•OH, •O 2 − ) species are initiated by the photogenerated holes and electrons. Therefore, efficient S-scheme heterostructure is highly desirable, in order to promote the charge migration and to sustain favorable charge potentials [ 23 , 24 ]. Until now, several S-scheme heterostructures such as SnFe 2 O 4 /ZnFe 2 O 4 [ 25 ], TiO 2 /W 18 O 49 [ 26 ], NiO/BiOI [ 27 ], BiVO 4 @MoS 2 [ 28 ], WO 3 /CdIn 2 S 4 [ 29 ], CdS/UiO-66 [ 30 ] were tested for dyes or pharmaceutical active compounds removal.…”

Section: Introductionmentioning

confidence: 99%

Tuned S-Scheme Cu2S_TiO2_WO3 Heterostructure Photocatalyst toward S-Metolachlor (S-MCh) Herbicide Removal

Eneşca

Isac

2021

Materials

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A dual S-scheme Cu2S_TiO2_WO3 heterostructure was constructed by sol–gel method using a two-step procedure. Due to the synthesis parameters and annealing treatment the heterostructure is characterized by sulfur deficit and oxygen excess allowing the passivation of oxygen vacancies. The photocatalytic activity was evaluated under UV and UV–Vis irradiation scenarios using S-MCh as reference pollutant. The heterostructure is composed on orthorhombic Cu2S, anatase TiO2 and monoclinic WO3 with crystallite sizes varying from 65.2 Å for Cu2S to 97.1 Å for WO3. The heterostructure exhibit a dense morphology with pellets and particle-like morphology closely combined in a relatively compact assembly. The surface elemental composition indicate that the heterostructure maintain a similar atomic ratio as established during the synthesis with a slight sulfur deficit due to the annealing treatments. The results indicate that the three-component heterostructure have higher photocatalytic efficiency (61%) comparing with two-component heterostructure or bare components. Moreover, Cu2S_TiO2_WO3 exhibit a superior constant rate (0.114 s−1) due to the high concentration of photogenerated charge carriers, efficient charge separation and migration.

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“…In practical applications, the three have some shortcomings. The application of photoelectrocatalytic oxidation technology is less limited, and it is more suitable for the treatment of refractory organic wastewater [1][2][3][4][5]. The actual operation of photoelectrocatalytic oxidation technology can be subdivided into photocatalytic oxidation technology, electrocatalytic oxidation technology and photoelectrocatalytic oxidation technology [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Three Catalytic Processes in Degradation of HPAM by tBu-TPyzPzCo

Wang

Li²,

Jiang

et al. 2021

Catalysts

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The present study describes a two-step synthesis process for the cobalt complex of tetra-2,3-(5,6-di-tert-butyl-pyrazino) porphyrazine (tBu-TPyzPzCo). The product was ultrasonically impregnated onto carbon black (CB) to prepare a supported catalyst (tBu-TPyzPzCo/CB). We built a split photoelectric catalytic device to test the performance of photocatalytic, electrocatalytic and photoelectrocatalytic degradation of partially hydrolyzed polyacrylamide (HPAM). The results confirm that HPAM exhibited more efficient degradation in the presence of a supporting catalyst using the photoelectrocatalytic process than by photocatalytic or electrocatalytic oxidation—or even the sum of the two in saline water. The photoelectrocatalytic reaction confirmed that the process conforms to quasi-first order reaction kinetics, while the reaction rate constants were 6.03 times that of photocatalysis and 3.97 times that of electrocatalysis. We also compared the energy consumption of the three processes and found that the photoelectrocatalytic process has the highest energy efficiency.

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Separable and recyclable meso-carbon@TiO2/carbon fiber composites for visible-light photocatalysis and photoelectrocatalysis

Cited by 17 publications

References 87 publications

Flexible Carbon-Fiber/Semimetal Bi Nanosheet Arrays as Separable and Recyclable Plasmonic Photocatalysts and Photoelectrocatalysts

Flexible Carbon-Fiber/Semimetal Bi Nanosheet Arrays as Separable and Recyclable Plasmonic Photocatalysts and Photoelectrocatalysts

Tuned S-Scheme Cu2S_TiO2_WO3 Heterostructure Photocatalyst toward S-Metolachlor (S-MCh) Herbicide Removal

Comparison of Three Catalytic Processes in Degradation of HPAM by tBu-TPyzPzCo

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