Facile fabrication of ZnO decorated ZnFe-layered double hydroxides @ biochar nanocomposites for synergistic photodegradation of tetracycline under visible light

In situformation of Cu2O decorated CuZnAl-layered double hydroxide heterostructured photocatalysts for enhancing the degradation of tetracycline under visible light

“…For the Cu 2 O sample, the significant bands at 607 cm À1 can be attributed to the shear and stretching vibration of M-O. 45,53 For CuZnAl-LDHs and Cu 2 O/CuZnAl-LDHs samples, the band at 1630 cm À1 was ascribed to the tensile vibration of H-O-H. The intense band at 1356 cm À1 was associated with the n 3 stretching mode of NO 3…”

“…with suitable band gap positions is one of the most promising ways to promote charge separation, because the difference in the interface potential will generate a built-in electric field to achieve feasible and effective spatial separation between photo-induced electrons and holes and inhibit their recombination. [43][44][45][46][47] Cu 2 O is a visible light active p-type semiconductor with a narrow direct band gap (E g of 1.8-2.6 eV), which could effectively utilize the large amount of visible light in sunlight and exhibit outstanding photoactivity in visible light. 44,[48][49][50][51] It is important to note that the high chemical activity of Cu 2 O arises from the +1 oxidation state of Cu, which can either be reduced to Cu 0 or oxidized to Cu 2+ thereby facilitating efficient redox reactions.…”

Enhanced visible light-driven photodegradation of tetracycline by salicylic acid-modified graphitic carbon nitride and toxicity assessment

“…S3), the electrostatic interaction between CNU-SA-2 and TC was repulsive at pH 3.08, 8.12 and 10.04. The electrostatic repulsion between CNU-SA-2 and TC was lowest at pH 5.53, resulting in the highest adsorption capacity promoting further TC degradation (Li et al 2022). On the other hand, photodegradation of TC was favored under the weakly alkaline condition (pH 8.12 and pH 10.04) since the deprotonated TC species are instable (Zhang et al…”

“…Conventional wastewater treatment approaches, such as ltration, adsorption, and biodegradation cannot completely degrade TC because of the naphthalene ring structure and hydrophilic property (Watkinson et al 2007). Recently, solar light-driven nanomaterial-based semiconductor photocatalysis is a promising strategy due to its high e ciency, easy operation, high mineralization rate, and environmental compatibility (Li et al 2022).…”

A Mini Review on Persulfate Activation by Sustainable Biochar for the Removal of Antibiotics

“…Two-dimensional metal materials (layered double hydroxides (LDH), metal–organic frameworks (MOFs)) are used to combine with biochar to improve catalytic capacity synergistically. A biochar scaffold can improve the dispersion and stability of two-dimensional materials and trigger the non-radical route in PS-AOPs [ 21 , 75 , 76 , 77 ]. MgFe-LDH/biochar was fabricated using derivatives from the activated sludge and applied for PMS activation to remove aqueous doxycycline [ 34 ].…”