Synthesis and characterization of boehmite/metal – Organic framework of type AlO(OH)/MOF‐74(Zn) for photocatalytic degradation of Congo red dye

Abstract

In the present work, boehmite metal‐organic framework nanocomposite, AlO(OH)/MOF‐74(Zn), was synthesized by a simple, fast, and low‐cost process. The post‐synthetic method was used for preparing new hybrid material. The photocatalytic efficiency of AlO(OH)/MOF‐74(Zn) was investigated by photocatalytic degradation of Congo Red anionic dye. The nanocomposite was characterized by various techniques. The electron microscopy images showed that the spherical MOF‐74 with about 30 nm was located over boehmite. The optical properties indicated the boehmite/MOF‐74 can be used as a visible‐light‐driven photocatalyst. Optimization of significant variables such as adsorbent dosage and initial Congo Red concentration and photodegradation time affecting removal was investigated and the optimized values were found to be 1 g/L, 10 mg/L, and 60 min, respectively. The AlO(OH)/MOF‐74(Zn) photocatalyst exhibited the highest catalytic performance for photodegradation of dye contaminants. Results indicated about 94% of tested dye were removed by a new hybrid photocatalyst under visible light irradiation. The results confirmed that due to some considerable features of AlO(OH)/MOF‐74(Zn) such as high surface area and chemical and thermal resistance, the introduced photocatalyst acts as a high‐performance photocatalyst for degradation of Congo Red dye in aqueous solutions.

La-Doped Sm2Zr2O7/PU-Coated Leather Composites with Enhanced Mechanical Properties and Highly Efficient Photocatalytic Performance

“…As can be seen from specific surface area tests, the specific surface area of Sm2Zr2O7 without La doping is 60.3 m 2 /g, while the specific surface area of Sm2Zr2O7 with 1%, 3%, The prepared sample shows visible light absorption properties before and after La doping (Figure 4a). The resulting products produced after complete photocatalytic activity of dyes are complex and diverse [24][25][26]. The catalytic mechanism is as follows: under the condition of illumination, electrons and holes are generated in the conduction band and valence band, respectively, forming electron-hole pairs.…”

Functional MOF-Based Materials for Environmental and Biomedical Applications: A Critical Review

“…Several researches have explored the utilization of metal-organic frameworks for the elimination of various dyes [222][223][224][225][226][227][228][229][230][231][232]. This paragraph focuses on the adsorptive elimination of selected dyes from solution to showcase the adsorption efficiency, reusability, as well as kinetic mechanisms of metal-organic frameworks.…”

“…The adsorption process was accurately illustrated by the Langmuir isotherm, as well as the pseudo-second-order kinetic model. Congo red dye has garnered significant attention and Sohrabnezhad and his team [232] utilized a facile and rapid procedure to develop sphere-shaped MOF-74 that was subsequently employed towards the photodegradation of Congo red. Maximum removal capacity equal to 94% was achieved after 60 min, adsorbent dosage equal to 1 g/L, and dye concentration equal to 10 mg/L.…”

Effective Removal of Congo Red from Water using Chitosan@UiO‐67 Hydrogel Spheres: Synthesis, Characterization and Adsorption Mechanisms

“…[3] Moreover, such dyes often contain organic aromatic hydrocarbon structures, which are extremely difficult to degrade under natural conditions. [4] The common treatment methods for dye wastewater contain chemical methods, [5][6][7][8] physical methods, [9][10][11][12] and biological methods. [13][14][15] The chemical method refers to adding chemical reactants to the wastewater containing dyes, using chemical reactions to form precipitates of water-insoluble dyes, and then filtering the precipitates out of the wastewater.…”