scholarly journals One-Pot Synthesis of Cu2O/Cu Self-Assembled Hollow Nanospheres with Enhanced Photocatalytic Performance

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Bo Zhou ◽  
Zhiguo Liu ◽  
Haijun Zhang ◽  
Yan Wu
Keyword(s):  
Photocatalytic Performance ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Light Illumination ◽  
One Pot ◽  
Thermal Synthesis ◽  
Synthesis Time ◽  
Visible Light Illumination ◽  
Template Free ◽  
Solid Spheres

Cu2O/Cu hollow spheres are prepared using one-pot template-free solvent-thermal synthesis route with (CH3COO)2Cu·H2O as a precursor. With the reaction time increasing gradually from 2 h to 20 h, the morphology of the Cu2O/Cu evolves from nanoparticle to hollow nanosphere. The hollow structure is obtained when the cooling rate falls down to 0.7°C/min. And the content of Cu in the hollow spheres also can be easily controlled by adjusting the solvent-thermal synthesis time. Using photocatalytic degradation of phenol as the probe molecules under visible-light illumination, we have investigated the influence of hollow structure on the photocatalytic activity of Cu2O/Cu. The prepared hollow sphere Cu2O/Cu particles exhibited a higher photodegradation capability than nanoparticles and solid spheres. When the content of Cu lies in the range of 11–86 wt%, the samples exhibit higher photocatalytic performance, indicating that the Cu2O/Cu particles with hollow structure are promising candidates for the processing of pollutants.

scholarly journals Hierarchical rattle-like N-doped anatase TiO2 superstructure: one-pot synthesis, morphological evolution and superior visible light photocatalytic activity

2016 ◽  
Vol 6 (9) ◽  
pp. 3108-3116 ◽  
Author(s):  
Guoliang Li ◽  
Gang Li ◽  
Jie Li ◽  
Guibin Jiang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Morphological Evolution ◽  
Light Illumination ◽  
One Pot ◽  
Ultrathin Nanosheets ◽  
Porous Core ◽  
Visible Light Illumination ◽  
Template Free ◽  
Visible Light Photocatalytic

A novel N-doped rattle-like hierarchical anatase superstructure with a spherical porous core and hierarchical shell composed of ultrathin nanosheets was synthesized via a facile template-free method, which exhibits enhanced photocatalytic activity under visible light illumination.

scholarly journals Enhanced Visible-Light Photocatalytic Performance of SAPO-5-Based g-C3N4 Composite for Rhodamine B (RhB) Degradation

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3948
Author(s):  
Lingfang Qiu ◽  
Zhiwei Zhou ◽  
Mengfan Ma ◽  
Ping Li ◽  
Jinyong Lu ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Redox Reactions ◽  
Photocatalytic Performance ◽  
Dye Degradation ◽  
Thermal Polymerization ◽  
Light Illumination ◽  
Electron Hole ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

Novel visible-light responded aluminosilicophosphate-5 (SAPO-5)/g-C3N4 composite has been easily constructed by thermal polymerization for the mixture of SAPO-5, NH4Cl, and dicyandiamide. The photocatalytic activity of SAPO-5/g-C3N4 is evaluated by degrading RhB (30 mg/L) under visible light illumination (λ > 420 nm). The effects of SAPO-5 incorporation proportion and initial RhB concentration on the photocatalytic performance have been discussed in detail. The optimized SAPO-5/g-C3N4 composite shows promising degradation efficiency which is 40.6% higher than that of pure g-C3N4. The degradation rate improves from 0.007 min−1 to 0.022 min−1, which is a comparable photocatalytic performance compared with other g-C3N4-based heterojunctions for dye degradation. The migration of photo-induced electrons from g-C3N4 to the Al site of SAPO-5 should promote the photo-induced electron-hole pairs separation rate of g-C3N4 efficiently. Furthermore, the redox reactions for RhB degradation occur on the photo-induced holes in the g-C3N4 and Al sites in SAPO-5, respectively. This achievement not only improves the photocatalytic activity of g-C3N4 efficiently, but also broadens the application of SAPOs in the photocatalytic field.

Preparation of hollow Fe3O4 spheres through a facile method and their applications

2017 ◽  
Vol 10 (06) ◽  
pp. 1750075 ◽  
Author(s):  
Xingping Wu ◽  
Aiping Zhu ◽  
Zhaodong Nan
Keyword(s):  
Saturation Magnetization ◽  
Ostwald Ripening ◽  
Solvothermal Method ◽  
Hollow Spheres ◽  
Hollow Structure ◽  
Solid Sphere ◽  
Small Particles ◽  
Potential Applications ◽  
One Step ◽  
Solid Spheres

Fe3O4 hollow microspheres with good dispersibility and high saturation magnetization were synthesized through a facile one-step solvothermal method. The formation mechanism of the hollow structure was studied by taking time-dependent experiments. Porous [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3 nanosheets were firstly fabricated. Fe3O4 solid spheres aggregated by small particles were obtained from the transition of [Formula: see text]-FeOOH and [Formula: see text]-Fe2O3. Finally, the solid sphere is transferred to hollow sphere through Ostwald ripening. The maximum saturation magnetization of the hollow spheres is [Formula: see text][Formula: see text]emu/g, which is higher than some results reported in references. The Fe3O4 hollow spheres show potential applications in microwave absorption and photocatalysis.

Synthesis of a superparamagnetic MFNs@SiO2@Ag4SiW12O40/Ag composite photocatalyst, its superior photocatalytic performance under visible light illumination, and its easy magnetic separation

RSC Advances ◽  
2014 ◽  
Vol 4 (57) ◽  
pp. 30090-30099 ◽  
Author(s):  
Wenshu Tang ◽  
Yu Su ◽  
Xiaoxin Wang ◽  
Qi Li ◽  
Shian Gao ◽  
...  
Keyword(s):  
Visible Light ◽  
Magnetic Separation ◽  
Photocatalytic Performance ◽  
Light Illumination ◽  
Composite Photocatalyst ◽  
Highly Efficient ◽  
Visible Light Illumination ◽  
Visible Light Photocatalytic

A novel superparamagnetic Ag@silver-based salt photocatalyst was created with highly efficient visible light photocatalytic performance and easy magnetic separation.

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