One-pot preparation of hierarchical Cu<sub>2</sub>O hollow spheres for improved visible-light photocatalytic properties

Dong, Yali; Tao, Feifei; Wang, Linxia; Lan, Mingxuan; Zhang, Jiayan; Hong, Tianjie

doi:10.1039/d0ra02460k

Cited by 14 publications

(7 citation statements)

References 45 publications

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“…For the carbon-supported metal nickel, the pore diameter of the carbon-supported metal nickel is measured to be about 2.82 nm and 56.24 nm (inset of Figure 3b). The mesopores smaller than 50 nm may be produced by the heat treatment, and the large pores may be due to the accumulation of nanospheres [44]. The carbon spheres have the similar N2 adsorption-desorption isotherms to the carbon-supported metal nickel, but have the larger pores at 2.99 nm and 65.16 nm, leading to the lower specific surface area.…”

Section: Morphology and Structure Characterizationmentioning

confidence: 99%

Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water

Jin

Kang

et al. 2022

IJERPH

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Magnetic carbon-supported metal nickel has been successfully synthesized by solvothermal method and heat treatment for highly effective adsorption of various reactive dyes. Structure characterization and composition analysis demonstrated that the metal nickel nanoparticles with the size of 1–2 nm were embedded into the pore of carbon spheres. It is helpful to prevent the agglomeration and falling off of metal nickel nanoparticles on the surface of carbon spheres. The adsorption performance of the carbon-supported metal nickel nanospheres for reactive brilliant yellow R-4GLN was studied by changing the pH value and initial concentration of the solution, adsorption time, adsorption temperature, and the amount of adsorbent. The carbon-supported metal nickel showed fast and efficient adsorption activity. After 5 min of adsorption, the removal efficiency of 10 mL 25 mg·mL−1 reactive brilliant yellow R-4GLN was close to 100%. The carbon-supported metal nickel composite was reused 20 times, and the removal efficiency of dye remained above 98%. It also showed good adsorption performance on various reactive dyes with wide universality, which has a certain adsorption effect on most dyes with a high utilization value in wastewater treatment.

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Section: Morphology and Structure Characterizationmentioning

confidence: 99%

Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water

Jin

Kang

et al. 2022

IJERPH

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“…As shown in Figure 3, similar to pure TiO 2 NTs, the CQD-modified TiO 2 NTs display type IV isotherms and the hysteresis loop at the P/P 0 value of 0.5−1.0, indicating the existence of mesoporous structure. 50,51 The above porous feature from the interleaving nanotubes and the cavities of hollow structures are further confirmed by the pore size distribution from the BJH model. The pore diameter of TiO 2 NTs is determined to be about 30, 45, and 105 nm (inset of Figure 3a).…”

Section: Resultsmentioning

confidence: 95%

Interface Modification of TiO₂ Nanotubes by Biomass-Derived Carbon Quantum Dots for Enhanced Photocatalytic Reduction of CO₂

Zhang

Jin

Tao

2021

ACS Appl. Energy Mater.

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As a greenhouse gas, the efficient conversion of carbon dioxide (CO2) into fuel by the photocatalytic technology is one of the feasible ways to promote sustainable energy development and achieve global energy demand. In this work, with special optical absorption and fluorescence emissions, biomass-derived carbon quantum dots (CQDs) are used to modify TiO2 nanotubes (NTs) for the enhancement of photocatalytic CO2 reduction. Monodisperse CQDs have a diameter of 2–5 nm and are loaded on TiO2 NTs, which are confirmed by various characterizations. Compared with TiO2 NTs, the as-prepared CQD-modified TiO2 NTs exhibit the significantly enhanced photocatalytic properties of CO2 reduction under irradiation. And the composite photocatalyst obtained by the combination of 10 mL of CQD solution with TiO2 NTs exhibits the highest CO2 photoreduction with the CO and CH4 yields of 13.55 and 3.54 μmol·g–1, which are 2.4 and 2.5 times that of TiO2 NTs, respectively. The higher CO2 photoreduction is ascribed to the introduction of CQDs into TiO2 NTs. Moreover, biomass-derived CQD-modified TiO2 NTs exhibit satisfactory stability for CO2 reduction. The encouraging photocatalytic performance for CO2 conversion exhibits that TiO2-based composites modified by carbon materials provide a feasible route to improve CO2 reduction utilizing abundant solar energy.

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“…Seven cycles of on/off irradiation were repeated, as shown in Figure 9 a, and all samples could obtain a stable photogenerated current when the irradiation was turned on, indicating that the samples were stable under cycling chopping irradiation. A higher photocurrent indicates better efficiency for the separation of photogenerated charges and better photocatalytic activity for the photoelectrode [ 46 ]. Comparatively, all the TC composite nanorods exhibited improved photoresponses compared to that of the pristine TiO 2 .…”

Section: Resultsmentioning

confidence: 99%

Sputtering-Assisted Synthesis of Copper Oxide–Titanium Oxide Nanorods and Their Photoactive Performances

Liang

2022

Nanomaterials

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A TiO2 nanorod template was successfully decorated with a copper oxide layer with various crystallographic phases using sputtering and postannealing procedures. The crystallographic phase of the layer attached to the TiO2 was adjusted from a single Cu2O phase or dual Cu2O–CuO phase to a single CuO phase by changing the postannealing temperature from 200 °C to 400 °C. The decoration of the TiO2 (TC) with a copper oxide layer improved the light absorption and photoinduced charge separation abilities. These factors resulted in the composite nanorods demonstrating enhanced photoactivity compared to that of the pristine TiO2. The ternary phase composition of TC350 allowed it to achieve superior photoactive performance compared to the other composite nanorods. The possible Z-scheme carrier movement mechanism and the larger granular size of the attached layer of TC350 under irradiation accounted for the superior photocatalytic activity in the degradation of RhB dyes.

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One-pot preparation of hierarchical Cu₂O hollow spheres for improved visible-light photocatalytic properties

Abstract: As visible light photocatalysts, narrow bandgap semiconductors can effectively convert solar energy to chemical energy, exhibiting potential applications in alleviating energy shortage and environmental pollution.

Cited by 14 publications

References 45 publications

Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water

Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water

Interface Modification of TiO₂ Nanotubes by Biomass-Derived Carbon Quantum Dots for Enhanced Photocatalytic Reduction of CO₂

Sputtering-Assisted Synthesis of Copper Oxide–Titanium Oxide Nanorods and Their Photoactive Performances

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One-pot preparation of hierarchical Cu2O hollow spheres for improved visible-light photocatalytic properties

Abstract: As visible light photocatalysts, narrow bandgap semiconductors can effectively convert solar energy to chemical energy, exhibiting potential applications in alleviating energy shortage and environmental pollution.

Cited by 14 publications

References 45 publications

Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water

Adsorption Behavior of Magnetic Carbon-Supported Metal Nickel for the Efficient Dye Removal from Water

Interface Modification of TiO2 Nanotubes by Biomass-Derived Carbon Quantum Dots for Enhanced Photocatalytic Reduction of CO2

Sputtering-Assisted Synthesis of Copper Oxide–Titanium Oxide Nanorods and Their Photoactive Performances

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Product

Resources

About

One-pot preparation of hierarchical Cu₂O hollow spheres for improved visible-light photocatalytic properties

Interface Modification of TiO₂ Nanotubes by Biomass-Derived Carbon Quantum Dots for Enhanced Photocatalytic Reduction of CO₂