Construction of efficient g-C3N4/NH2-UiO-66 (Zr) heterojunction photocatalysts for wastewater purification

Mechanism and Application of Metal-Organic Framework in Wastewater Treatment

“…Enhancing the pH level of the solution was discovered to help with ion removal because the more anionic MOF surface produced better electrostatic interactions with the metal ions. This MOF's peak of Cd (II) removal capability was estimated to be 100mg/g [23]. We can see that Cuterephthalate MOF will interreact with the heavy metal ion through ion exchange, which occurs in the pores of the sorbent and on the sorbent's surface, as shown in Fig.…”

“…We can see that Cuterephthalate MOF will interreact with the heavy metal ion through ion exchange, which occurs in the pores of the sorbent and on the sorbent's surface, as shown in Fig. 3 [23].…”

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

“…(1) A wide range of semiconductors can be coupled with MOFs and then used in the photocatalytic degradation of organic pollutants: TiO 2 , 111,112 other metal oxides, 113 perovskites, 54,114 g-C 3 N 4 , [115][116][117] etc. (2) The heterojunction approach allows for combining the different favorable properties of each compound, extending their absorption range, improving their chemical stability towards photocorrosion, and decreasing the recombination of electron-hole pairs.…”

“…[129][130][131] Type-II heterojunctions Among a huge number of semiconductors, g-C 3 N 4 has significant advantages: visible light-response, low cost, ease of preparation, chemical stability, non-toxicity, and appropriate energy levels and band structure for the creation of type-II heterojunctions. For the construction of such heterojunctions, UiO, 116,117,[132][133][134] MIL, 126,[135][136][137][138][139][140] ZIF 141 families and other MOFs 74,115,142,143 are actively used. For instance, Lv et al 116 prepared a novel NH 2 -UiO-66@g-C 3 N 4 photocatalyst decorated with the electron deficient benzothiadiazole group for the degradation of various antibiotics (sulfamethoxazole, tetracycline, ofloxacin, diclofenac, and ibuprofen) using a xenon lamp (500 W, ⊗ > 400 nm) as the visible light source.…”

“…The development of heterojunctions based on MOFs with other semiconductors may become the most promising route for the preparation of highly active photocatalysts. This assumption is explained by the following factors: A wide range of semiconductors can be coupled with MOFs and then used in the photocatalytic degradation of organic pollutants: TiO 2 , 111,112 other metal oxides, 113 perovskites, 54,114 g‐C 3 N 4 , 115‐117 etc. The heterojunction approach allows for combining the different favorable properties of each compound, extending their absorption range, improving their chemical stability towards photocorrosion, and decreasing the recombination of electron–hole pairs 16,118 The large surface area of MOF‐based heterojunctions provides more active sites for the photocatalytic transformations. Due to their uniform porosity and large surface area, MOFs are an excellent material for the efficient distribution of the second semiconductor onto their surface, leading to the formation of well‐matched heterojunctions 119 …”