scholarly journals MOFs Derived Hetero-ZnO/Fe2O3 Nanoflowers with Enhanced Photocatalytic Performance towards Efficient Degradation of Organic Dyes

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3239
Author(s):  
Fakhr uz Zaman ◽  
Bing Xie ◽  
Jinyang Zhang ◽  
Tianyu Gong ◽  
Kai Cui ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Dyes ◽  
Uv Light ◽  
Degradation Mechanism ◽  
Band Alignment ◽  
Light Irradiation ◽  
Radical Scavenger ◽  
Strong Light ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities

It is still a challenge for wastewater treatment to develop efficient yet low-cost photocatalysts on a large scale. Herein, a facile yet efficient method was devised to successfully synthesize ZnO/Fe2O3 nanoflowers (NFs) by using metal organic framework ZIF-8 as the precursor. The photocatalytic activities of the as-prepared hetero-ZnO/Fe2O3 NFs are purposefully evaluated by photocatalytic degradation of methylene blue (MB) and methyl orange (MO) under UV light irradiation. The resulting ZnO/Fe2O3 NFs display even higher photocatalytic activities than those of single-phase ZnO and Fe2O3 as a photocatalyst for the degradation of both MB ad MO. Particularly, nearly 100% MB can be photocatalytically degraded in 90 min under UV light irradiation using the hetero-NFs photocatalyst. The enhanced photocatalytic properties are probably ascribed to the synergistic contributions from the suitable band alignment of ZnO and Fe2O3, large surface area, and strong light absorption property. Radical scavenger experiments prove that the photogenerated holes, ·OH and ·O2-, play key roles in photocatalytic degradation process of organic dyes. Accordingly, the photocatalytic degradation mechanism of hetero-ZnO/Fe2O3 NFs towards dyes is tentatively proposed. The work contributes an effective way to rationally design and fabricate advanced photocatalysts with heterojunction structures for photocatalytic applications.

Fluorescence detection of aromatic amines and photocatalytic degradation of rhodamine B under UV light irradiation by luminescent metal–organic frameworks

2015 ◽  
Vol 39 (6) ◽  
pp. 4437-4444 ◽  
Author(s):  
Fengqin Wang ◽  
Caifu Dong ◽  
Chengmiao Wang ◽  
Zongchao Yu ◽  
Shukun Guo ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Fluorescence Detection ◽  
Rhodamine B ◽  
Aromatic Amines ◽  
Organic Dyes ◽  
Uv Light ◽  
Metal Organic Frameworks ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Metal Organic

Two MOFs were employed as fluorescence materials for selectively sensing aromatic amines as well as the photodegradation of organic dyes.

scholarly journals Photocatalytic degradation of ethylene by Ga2O3 polymorphs

RSC Advances ◽  
2018 ◽  
Vol 8 (26) ◽  
pp. 14328-14334 ◽  
Author(s):  
Hongshuai Liu ◽  
Zeyan Wang ◽  
Huiliang Li ◽  
Xiaoyang Zhang ◽  
Xiaoyan Qin ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities

In this work, we fabricated four different Ga2O3 polymorphs, namely, α-, β-, γ-, δ-Ga2O3, and investigated their photocatalytic activities by the degradation of ethylene under ultraviolet (UV) light irradiation.

Solid-phase photocatalytic degradation of polyethylene–goethite composite film under UV-light irradiation

2009 ◽  
Vol 172 (2-3) ◽  
pp. 1424-1429 ◽  
Author(s):  
G.L. Liu ◽  
D.W. Zhu ◽  
S.J. Liao ◽  
L.Y. Ren ◽  
J.Z. Cui ◽  
...  
Keyword(s):  
Composite Film ◽  
Photocatalytic Degradation ◽  
Solid Phase ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation

scholarly journals Facile Hydrothermal Synthesis of SnO2 Nanospheres as Photocatalysts

2017 ◽  
Vol 2017 ◽  
pp. 1-6
Author(s):  
Wenquan Hu ◽  
Xiaoguang Yuan
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Organic Dyes ◽  
Uv Light ◽  
Average Diameter ◽  
Potential Candidate ◽  
Wastewater Purification ◽  
Uv Light Irradiation ◽  
Degradation Rates ◽  
Photocatalytic Activities

Large amounts of SnO2 nanospheres are successfully synthesized through a simple and effective hydrothermal method. The as-synthesized products consist of numerous small SnO2 nanocrystals with an average diameter of 40 nm. The as-prepared SnO2 nanospheres are further used as the photocatalysts for photodegrading several organic dyes (methylene blue, methyl orange, Congo red, and rhodamine B) under UV light irradiation. The photocatalytic results show that the as-synthesized SnO2 nanospheres possess high photocatalytic activities. Compared with the degradation rates of other dyes, that of methylene blue reaches 98.5% by 30 min irradiation. It reveals that the as-prepared product might be potential candidate in wastewater purification.

scholarly journals Photocatalytic performance of TiO2 particles in degradation of various organic dyes under visible and UV light irradiation

2020 ◽  
Author(s):  
A. T. Le ◽  
S. Y. Pung ◽  
S. L. Chiam ◽  
N. A. H. BT. N. Josoh ◽  
T. Y. Koay ◽  
...  
Keyword(s):  
Photocatalytic Performance ◽  
Organic Dyes ◽  
Uv Light ◽  
Light Irradiation ◽  
Tio2 Particles ◽  
Uv Light Irradiation

Enhanced Photocatalytic Properties of N and Fe Co-Doped TiO2 Nanocomposites with Reduced Graphene Oxide for Volatile Organic Compounds

2019 ◽  
Vol 11 (9) ◽  
pp. 1263-1270 ◽  
Author(s):  
Zhanguo Li ◽  
Chao Shi ◽  
Lijuan Wang ◽  
Lijing Sun ◽  
Qiang Sun
Keyword(s):  
Graphene Oxide ◽  
Volatile Organic Compounds ◽  
Photocatalytic Degradation ◽  
Reduced Graphene Oxide ◽  
Organic Compounds ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Reduced Graphene ◽  
Volatile Organic

Photocatalytic nanocomposites of titanium dioxide (TiO2) were prepared by hydrothermal method. Reduced graphene oxide (RGO) was applied to prepare various TiO2 composites of doped nanoparticles by using NH4Cl and FeCl3 as sources. The structure and morphology of these composites showed that TiO2 was loaded on surface of RGO. Meanwhile, the agglomeration of TiO2 decreased and the dispersion became uniform for doped materials. Under ultraviolet (UV) light irradiation, the photocatalytic degradation of volatile organic compounds (VOC) by RGO/TiO2 composites with codoping of N and Fe reached to 90.5%. The photocatalytic degradation was higher than RGO/TiO2 composites and pure TiO2 by 1.8 and 5.9 times, respectively. The role of co-doping composites may have a possible mechanism for toluene under UV light irradiation. The enhanced photocatalytic properties were attributed to N and Fe doping which generated intermediate energy level, extended absorption and decreased band gap of UV light.

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