Enhanced sunlight photocatalytic performance of Sn-doped ZnO for Methylene Blue degradation

A highly efficient and elaborately structured visible-light-driven catalyst composed of mesoporous TiO2 (MT) doped with Ag+-coated graphene (MT-Ag/GR) has been successfully fabricated by a sol–gel and solvothermal method.

Download Full-text

Enhanced photocatalytic activity of Al and Fe co-doped ZnO nanorods for methylene blue degradation

Ceramics International ◽

10.1016/j.ceramint.2019.07.132 ◽

2019 ◽

Vol 45 (17) ◽

pp. 21430-21435 ◽

Cited By ~ 26

Author(s):

N.R. Khalid ◽

A. Hammad ◽

M.B. Tahir ◽

M. Rafique ◽

T. Iqbal ◽

...

Keyword(s):

Methylene Blue ◽

Photocatalytic Activity ◽

Zno Nanorods ◽

Methylene Blue Degradation ◽

Doped Zno ◽

Co Doped

Download Full-text

Enhanced Photocatalytic Performance of NiO-Decorated ZnO Nanowhiskers for Methylene Blue Degradation

Journal of Nanotechnology ◽

10.1155/2014/212694 ◽

2014 ◽

Vol 2014 ◽

pp. 1-8 ◽

Cited By ~ 19

Author(s):

I. Abdul Rahman ◽

M. T. M. Ayob ◽

S. Radiman

Keyword(s):

Aqueous Solution ◽

Methylene Blue ◽

Photocatalytic Activity ◽

Uv Irradiation ◽

Degradation Rate ◽

Photocatalytic Performance ◽

Nio Nanoparticles ◽

Methylene Blue Degradation ◽

Maximal Peak ◽

P Type

ZnO nanowhiskers were used for photodecomposition of methylene blue in aqueous solution under UV irradiation. The rate of methylene blue degradation increased linearly with time of UV irradiation. 54% of degradation rate was observed when the ZnO nanowhiskers were used as photocatalysts for methylene blue degradation for 80 min under UV irradiation. The decoration of p-type NiO nanoparticles on n-type ZnO nanowhiskers significantly enhanced photocatalytic activity and reached 72% degradation rate of methylene blue by using the same method. NiO-decorated ZnO was recycled for second test and shows 66% degradation from maximal peak of methylene blue within the same period. The increment of photocatalytic activity of NiO-decorated ZnO nanowhiskers was explained by the extension of the electron depletion layer due to the formation of nanoscale p-n junctions between p-type NiO and n-type ZnO. Hence, these products provide new alternative proficient photocatalysts for wastewater treatment.

Download Full-text

Visible light assisted photocatalytic performance of Ni and Th co-doped ZnO nanoparticles for the degradation of methylene blue dye

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2013.12.086 ◽

2014 ◽

Vol 20 (5) ◽

pp. 3826-3833 ◽

Cited By ~ 37

Author(s):

K. Vignesh ◽

M. Rajarajan ◽

A. Suganthi

Keyword(s):

Methylene Blue ◽

Visible Light ◽

Zno Nanoparticles ◽

Photocatalytic Performance ◽

Blue Dye ◽

Methylene Blue Dye ◽

Doped Zno ◽

Co Doped

Download Full-text

Synthesis of Heterostructure of ZnO@MOF-46(Zn) to Improve the Photocatalytic Performance in Methylene Blue Degradation

Crystals ◽

10.3390/cryst11111379 ◽

2021 ◽

Vol 11 (11) ◽

pp. 1379

Author(s):

Jiraporn Buasakun ◽

Phakinee Srilaoong ◽

Ramida Rattanakam ◽

Tanwawan Duangthongyou

Keyword(s):

Methylene Blue ◽

Band Gap ◽

Photocatalytic Performance ◽

Degradation Process ◽

Band Gap Energy ◽

Photocatalytic Efficiency ◽

Electron Hole ◽

Methylene Blue Degradation ◽

Gap Energy ◽

Hole Recombination

The heterostructure of ZnO and MOF-46(Zn) was synthesized to improve the photocatalytic performance of ZnO and prove the synergistic theory that presented the coexistence of ZnO and MOF-46(Zn), providing better efficiency than pure ZnO. The heterostructure material was synthesized by using prepared ZnO as a Zn2+ source, which was reacted with 2-aminoterephthalic acid (2-ATP) as a ligand to cover the surface of ZnO with MOF-46(Zn). The ZnO reactant materials were modified by pyrolysis of various morphologies of IRMOF-3 (Zn-MOF) prepared by using CTAB as a morphology controller. The octahedral ZnO obtained at 150 mg of CTAB shows better efficiency for photodegradation, with 85.79% within 3 h and a band gap energy of 3.11 eV. It acts as a starting material for synthesis of ZnO@MOF-46(Zn). The ZnO/MOF-46(Zn) composite was further used as a photocatalyst material in the dye (methylene blue: MB) degradation process, and the performance was compared with that of pure prepared ZnO. The results show that the photocatalytic efficiency with 61.20% in the MB degradation of the heterostructure is higher than that of pure ZnO within 60 min (90.09% within 180 min). The reason for this result may be that the coexistence of ZnO and MOF-46(Zn) can absorb a larger range of energy and reduce the possibility of the electron–hole recombination process.

Download Full-text

Enhanced Photocatalytic Performance of CuFeO2-ZnO Heterostructures for Methylene Blue Degradation under Sunlight

10.21203/rs.3.rs-231641/v1 ◽

2021 ◽

Author(s):

Preethi Sudarsan ◽

Vivek Seethapathy ◽

Priya Ranganathan ◽

Balakumar S ◽

Suresh Babu Krishnamoorthy

Keyword(s):

Methylene Blue ◽

Photocatalytic Performance ◽

Hydrothermal Process ◽

Time Resolved ◽

Raman Analysis ◽

Methylene Blue Degradation ◽

Weight Percentage ◽

Band Alignments ◽

P Type

Abstract Development of heterostructures is one of the constructive strategies for enhancing the photocatalytic activity. Here, novel CuFeO 2 -ZnO heterostructures with different weight percentage (CuFeO 2 = 0.5, 1, 5, 10%) were prepared by two-step precipitation-hydrothermal process. The structural confirmation was done by XRD and Raman analysis. The photocatalytic efficiency of the heterostructures was assessed by the degradation of methylene blue under sunlight. CuFeO 2 -ZnO heterostructures enhanced the photocatalytic performance compared to pure ZnO and CuFeO 2 . Among all, 5 wt % of CuFeO 2 on ZnO exhibited 100% degradation with 16 fold faster kinetics than ZnO. Time-resolved photoluminescent analysis revealed the increase in lifetime of charge carriers in the heterostructure. The band alignments of ZnO and CuFeO 2 , evaluated by Mott–Schottky revealed the existence of Type 1 heterostructures. Further, the heterostructures exhibited good recyclability. Thus, the present work demonstrates the use of p-type CuFeO 2 and n-type ZnO heterostructures as potential photocatalysts.

Download Full-text