scholarly journals Novel LaAOx/g-C3N4 (A = V, Fe, Co) Heterojunctions with Enhanced Photocatalytic Degradation of Norfloxacin under Visible Light

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1173
Author(s):  
Jiwen Jiang ◽  
Yonghua Li
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Hydrothermal Method ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Promising Method ◽  
Photodegradation Efficiency ◽  
Ft Ir ◽  
Successful Integration

In this study, novel photocatalysts LaAOx/g-C3N4 (A = V, Fe, Co) were prepared by the hydrothermal method, through which LaAOx and g-C3N4 were mixed and ultrasonically oscillated to gain heterojunction catalysts. All the samples were characterized by XRD, SEM, FT-IR, XPS, DRS, and PL to ensure the successful integration of LaAOx with g-C3N4. The obtained results showed that LaAOx/g-C3N4 (A = V, Fe, Co) could effectually improve the separation efficiency of photogenerated carriers during the photodegradation process, thus improving the photodegradation efficiency, while among them, LaFeO3/g-C3N4 showed the best photocatalytic performance and degradation of norfloxacin under visible light, reaching up to 95% in 180 min, which was 9.32 times higher than pristine g-C3N4. From the discussed results above, the possible mechanism of the photodegradation process was put forward. This study supplies a promising method to gain g-C3N4-based photocatalysts for antibiotics removal.

scholarly journals Synthesis of a Novel Photocatalyst MVO4/g-C3N4 (M = La, Gd) with Better Photocatalytic Activity for Tetracycline Hydrochloride Degradation under Visible-Light Irradiation

Crystals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 756
Author(s):  
Zhengru Zhu ◽  
Songlin Han ◽  
Yongqiang Cao ◽  
Junchao Jiang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Light Irradiation ◽  
Tetracycline Hydrochloride ◽  
Photodegradation Efficiency ◽  
Ft Ir

In this study, novel photocatalysts MVO4/g-C3N4 (M = La, Gd) were prepared by the hydrothermal method, through which different loading amounts of 10–50%MVO4 and g-C3N4 were mixed and ultrasonically oscillated to gain heterojunction catalysts. All the samples were characterized by XRD, SEM, TEM, FT-IR, XPS, Us-vis, and PL to ensure the successful integration of LaVO4 and GdVO4 with g-C3N4. The obtained results showed that MVO4/g-C3N4 could effectually improve the separation efficiency of photogenerated carriers during the photodegradation process, thus improving the photodegradation efficiency, while among them, 40%GdVO4/g-C3N4 showed the best photocatalytic performance and degradation of tetracycline hydrochloride, reaching up to 91% for 3 h, which was 3.64 times higher than pristine g-C3N4. From the discussed results above, the possible mechanism of the photodegradation process was put forward. This study supplies a promising method to gain g-C3N4-based photocatalysts for antibiotics removal.

scholarly journals The Ternary Heterostructures of BiOBr/Ultrathin g-C3N4/Black Phosphorous Quantum Dot Composites for Photodegradation of Tetracycline

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1118 ◽  
Author(s):  
Tianhao Jiang ◽  
Chaoqun Shang ◽  
Qingguo Meng ◽  
Mingliang Jin ◽  
Hua Liao ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Efficient Method ◽  
Charge Separation ◽  
Separation Efficiency ◽  
Photodegradation Efficiency ◽  
Charge Separation Efficiency ◽  
Black Phosphorous ◽  
Water Bath Heating

Herein, we synthesized BiOBr/ultrathin g-C3N4/ternary heterostructures modified with black phosphorous quantum dots using a simple water bath heating and sonication method. The ternary heterostructure was then used for the photocatalytic degradation of tetracycline in visible light, with an efficiency as high as 92% after 3 h of irradiation. Thus, the photodegradation efficiency is greatly improved compared to that of ultrathin g-C3N4, BiOBr, and black phosphorous quantum dots alone. The synthesized ternary heterostructure improves the charge separation efficiency, thus increasing the photodegradation efficiency. This work provides a new and efficient method for the degradation of antibiotics in the environment.

Study of the promotion mechanism of the photocatalytic performance and stability of the Ag@AgCl/g-C3N4 composite under visible light

RSC Advances ◽  
2014 ◽  
Vol 4 (72) ◽  
pp. 38124-38132 ◽  
Author(s):  
Yuyu Bu ◽  
Zhuoyuan Chen ◽  
Chang Feng ◽  
Weibing Li
Keyword(s):  
Electric Field ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Photogenerated Electrons ◽  
Promotion Mechanism

The formation of an effective heterojunction electric field at the interface between g-C3N4 and Ag@AgCl significantly strengthens the separation efficiency of the photogenerated electrons and holes, leading to a dramatic promotion of the photocatalytic degradation performance.

scholarly journals Construction of Ag3PO4/SnO2 Heterojunction on Carbon Cloth with Enhanced Visible Light Photocatalytic Degradation

2020 ◽  
Vol 10 (9) ◽  
pp. 3238
Author(s):  
Min Liu ◽  
Guangxin Wang ◽  
Panpan Xu ◽  
Yanfeng Zhu ◽  
Wuhui Li
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Photogenerated Electron ◽  
Carbon Cloth ◽  
Electron Hole ◽  
Step Process ◽  
Photogenerated Electrons ◽  
Rapid Transfer ◽  
Visible Light Photocatalytic

In this study, the Ag3PO4/SnO2 heterojunction on carbon cloth (Ag3PO4/SnO2/CC) was successfully fabricated via a facile two-step process. The results showed that the Ag3PO4/SnO2/CC heterojunction exhibited a remarkable photocatalytic performance for the degradation of Rhodamine B (RhB) and methylene blue (MB), under visible light irradiation. The calculated k values for the degradation of RhB and MB over Ag3PO4/SnO2/CC are 0.04716 min−1 and 0.04916 min−1, which are higher than those calculated for the reactions over Ag3PO4/SnO2, Ag3PO4/CC and SnO2/CC, respectively. The enhanced photocatalytic activity could mainly be attributed to the improved separation efficiency of photogenerated electron-hole pairs, after the formation of the Ag3PO4/SnO2/CC heterojunction. Moreover, carbon cloth with a large specific surface area and excellent conductivity was used as the substrate, which helped to increase the contact area of dye solution with photocatalysts and the rapid transfer of photogenerated electrons. Notably, when compared with the powder catalyst, the catalysts supported on carbon cloth are easier to quickly recycle from the pollutant solution, thereby reducing the probability of recontamination.

Enhanced Photocatalytic Performance of Sn6SiO8 Nanoparticles and Their Reduced Graphene Oxide (rGO) Nanocomposite

2020 ◽  
Vol 20 (9) ◽  
pp. 5426-5432
Author(s):  
G. Gnanamoorthy ◽  
M. Muthukumaran ◽  
P. Varun Prasath ◽  
V. Karthikeyan ◽  
V. Narayanan ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Dye Degradation ◽  
Hexagonal Phase ◽  
Active Species ◽  
Organic Chemical ◽  
Light Illumination ◽  
Sem Images ◽  
Radical Trapping

Photocatalysts provide excellent potential for the full removal of organic chemical pollutants as an environmentally friendly technology. It has been noted that under UV-visible light irradiation, nanostructured semiconductor metal oxides photocatalysts can degrade different organic pollutants. The Sn6SiO8/rGO nanocomposite was synthesized by a hydrothermal method. The Sn6SiO8 nanoparticles hexagonal phase was confirmed by XRD and functional groups were analyzed by FT-IR spectroscopy. The bandgap of Sn6SiO8 nanoparticles (NPs) and Sn6SiO8/GO composites were found to be 2.7 eV and 2.5 eV, respectively. SEM images of samples showed that the flakes like morphology. This Sn6SiO8/rGO nanocomposite was testing for photocatalytic dye degradation of MG under visible light illumination and excellent response for the catalysts. The enhancement of photocatalytic performance was mainly attributed to the increased light absorption, charge separation efficiency and specific surface area, proved by UV-vis DRS. Further, the radical trapping experiments revealed that holes (h+) and superoxide radicals (·O−2) were the main active species for the degradation of MG, and a possible photocatalytic mechanism was discussed.

Visible light driven 3D hierarchical CoTiO3/BiOBr direct Z-scheme heterostructure with enhanced photocatalytic degradation performance

2021 ◽  
Author(s):  
Lijie Wang ◽  
Qiang Li ◽  
Xiaoxiao Lu ◽  
Zhenfei Tian ◽  
Shiwu He ◽  
...  
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Hydrothermal Method ◽  
Three Dimensional ◽  
Simple Hydrothermal Method ◽  
Visible Light Driven

A series of novel three-dimensional (3D) CoTiO3/BiOBr (CTBB) hierarchical heterostructures were prepared via a simple hydrothermal method. In comparison with pure CoTiO3 and BiOBr, all the CTBB nanocomposites display enhanced...

Boosting the photocatalytic performance of (001) BiOI: enhancing donor density and separation efficiency of photogenerated electrons and holes

2016 ◽  
Vol 52 (30) ◽  
pp. 5316-5319 ◽  
Author(s):  
Wenjie Fan ◽  
Haibo Li ◽  
Fengyi Zhao ◽  
Xujing Xiao ◽  
Yongchao Huang ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Photocatalytic Performance ◽  
Separation Efficiency ◽  
Light Irradiation ◽  
Donor Density ◽  
Photogenerated Electrons ◽  
Bioi Nanosheets

BiOI nanosheets with highly exposed (001) and surface disorders are used for efficient photocatalytic HCHO oxidation under visible light irradiation.

Facile synthesis of magnetic Bi25FeO40/rGO catalyst with efficient photocatalytic performance for phenolic compounds under visible light

RSC Advances ◽  
2015 ◽  
Vol 5 (7) ◽  
pp. 4905-4908 ◽  
Author(s):  
Yan Wu ◽  
Hanjin Luo ◽  
Xiaolu Jiang ◽  
Hou Wang ◽  
Junjie Geng
Keyword(s):  
Graphene Oxide ◽  
Phenolic Compounds ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Reduced Graphene Oxide ◽  
Photocatalytic Performance ◽  
Utilization Efficiency ◽  
Facile Synthesis ◽  
Facile Hydrothermal Method ◽  
Reduced Graphene

To improve the utilization efficiency of the Bi25FeO40 catalyst, Bi25FeO40-reduced graphene oxide (rGO) composite photo-catalysts were prepared by a facile hydrothermal method.

N/Ti3+-codoped triphasic TiO2/g-C3N4 heterojunctions as visible-light photocatalysts for the degradation of organic contaminants

2019 ◽  
Vol 43 (6) ◽  
pp. 2665-2675 ◽  
Author(s):  
Xiaojiao Yuan ◽  
Mingxuan Sun ◽  
Yuan Yao ◽  
Xiaojing Lin ◽  
Jifeng Shi
Keyword(s):  
Visible Light ◽  
Hydrothermal Method ◽  
Organic Contaminants ◽  
Photocatalytic Performance ◽  
One Step

N/Ti3+-codoped triphasic TiO2/g-C3N4 heterojunctions were successfully prepared by a one-step in situ hydrothermal method, and they demonstrated considerably enhanced photocatalytic performance.

Synthesis and Characterization of CuS/CdS Photocatalyst with Enhanced Visible Light-Photocatalytic Activity

2017 ◽  
Vol 48 ◽  
pp. 49-61 ◽  
Author(s):  
A. Malathi ◽  
J. Madhavan
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Diffuse Reflectance Spectroscopy ◽  
Photogenerated Electron ◽  
Impregnation Method ◽  
X Ray Diffraction ◽  
Charge Generation ◽  
Visible Light Active ◽  
Ft Ir ◽  
Cds Nanocomposites

In the present study, visible light active CuS/CdS nanocomposites of various compositions (1%, 2% and 3%) were synthesized via wet impregnation method and these photocatalysts were characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy and UV-visible diffuse reflectance spectroscopy (DRS). The photocatalytic degradation efficiency of the synthesized photocatalysts was evaluated from the degradation of methylene blue (MB) under the visible light irradiation. Among all compositions, a 1% CuS/CdS nanocomposite showed about 89.5% degradation in 90 min than the pure CuS, CdS and other composites. Photoluminescence and photoelectrochemical measurements indicated that the 1% CuS/CdS nanocomposite greatly enhanced the charge generation and restrained the recombination of photogenerated electron-hole pairs. A possible mechanism of photocatalytic degradation has been proposed.

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