With the rapid development of industrialization and globalization in recent years, an increasing amount of textile dye wastewater and pharmaceutical wastewater has been discharged into the environment. Current wastewater treatment technology has difficulty meeting all the practical requirements of harmless wastewater discharge, and therefore, the exploration and development of new technologies to treat various types of wastewater is urgently needed. Advanced oxidation processes (AOPs) have the advantages of strong oxidation ability, complete decomposition of organic pollutants, and no secondary pollution, and scientists have found that the introduction of nanocatalysts with good performance into AOPs can achieve excellent treatment effects. Numerous studies have shown that the introduction of catalysts to AOPs can greatly improve the treatment effect. These results demonstrate that AOPs may be an efficient approach for the large-scale treatment of wastewater, however, there are very few systematic reviews that address the treatment of textile dye wastewater and pharmaceutical residue wastewater by AOPs. This study provides a unique focus on the advantages and disadvantages of single AOPs, AOPs combined with nanocatalsyts, and other technologies for the treatment of textile dye wastewater and pharmaceutical residual wastewater, and several critical mechanisms of the degradation of pollutants have been summarized and analyzed. Finally, the challenges and prospects of AOPs in wastewater treatment are summarized. This study provides a useful theoretical foundation and practical guidance for scientists in the fields of environmental science, environmental engineering, and environmental health.

Treatment of industrial dye wastewater and pharmaceutical residue wastewater by advanced oxidation processes and its combination with nanocatalysts: A review

Multivalent metal catalysts in Fenton/Fenton-like oxidation system: A critical review

Nanocarbons with single‐metal atoms (M‐SAs) have displayed considerable potential in various fields of application due to high free energy of M‐SAs and strong metal‐support interaction. However, the uniform dispersion of M‐SAs within the whole carbon matrix still remains a great challenge. Herein, Ni‐SAs are uniformly dispersed within hierarchically porous carbon nanoflowers (Ni‐SA/HPCF) via a spatial confinement of Ni ions within the periodic pores in metal‐organic frameworks (MOFs) with a subsequent carbonization process. The Ni‐SA/HPCF with abundant mesopores and an ultrahigh surface area (1137.2 m2 g−1) exhibits unexpected electromagnetic wave (EMW) absorption property with a minimal reflection loss of –53.2 dB and an effective absorption bandwidth of 5.0 GHz, while the filler ratio in the matrix is merely 10 wt.%. Density functional theory calculations and experimental results reveal that the uniformly dispersed Ni‐SAs break local symmetry of the electronic structure and increase electrical conductivity of host carbon matrix, thereby enhancing the EMW absorption properties. In addition, the unique 3D hierarchical porous morphology boosts the impedance matching property, which synergistically improves the EMW absorption performance of the Ni‐SA/HPCF. This study provides an efficient approach to uniformly disperse M‐SAs within hierarchically porous nanocarbons for EMW absorption and other potential applications.

Metal Ions Confined in Periodic Pores of MOFs to Embed Single‐Metal Atoms within Hierarchically Porous Carbon Nanoflowers for High‐Performance Electromagnetic Wave Absorption

Fe/Co bimetallic nanoparticles embedded in MOF-derived nitrogen-doped porous carbon rods as efficient heterogeneous electro-Fenton catalysts for degradation of organic pollutants

Cu/CuFe2O4 integrated graphite felt as a stable bifunctional cathode for high-performance heterogeneous electro-Fenton oxidation

MOFs derived Co/Cu bimetallic nanoparticles embedded in graphitized carbon nanocubes as efficient Fenton catalysts.

Rationally designed carbon materials with superstructures are promising candidates in applications such as electrocatalysis. However, the synthesis of highly porous carbon superstructures with macropores and carbon defects from a simple crystalline solid remains challenging. In this work, superstructured macroporous carbon rods composed of defective graphitic nanosheets are synthesized by direct carbonization of crystalline poly tannic acid (PTA) rods as precursors. During carbonization, PTA rods with a highly ordered lamellar structure induce a spatially confined two-step localized contraction that takes place in different dimensions and directions in each step. The unexpected contraction behavior results in the sponge-like macroporous carbon superstructure with large surface area, high porosity, and abundant defects, thus showing a superior electrocatalytic performance with high activity and selectivity for oxygen reduction reaction. The study provides new understandings in the design of functional carbon materials with distinctive structures and applications.

https://onlinelibrary.wiley.com/doi/pdf/10.1002/advs.202100120

Superstructured Macroporous Carbon Rods Composed of Defective Graphitic Nanosheets for Efficient Oxygen Reduction Reaction.

Abstract The one‐pot synthesis of 2,5‐furandicarboxylic acid from 2‐furoic acid with a yield of 57 % was achieved for the first time using a Pd‐catalyzed bromination‐hydroxycarbonylation tandem reaction in HOAc‐NaOAc buffer. This synthetic protocol shows major improvements compared to previously reported methods, such as using biomass‐based 2‐furoic acid as low‐cost raw material, one‐pot synthesis without isolation of intermediate products, and no need for an acidification procedure. Experiments indicate that the involved Xantphos‐modified Pd‐catalyst and the buffer solution play significant promoting roles for each individual reaction whereas Br2 (as the brominating reagent) had a negative effect on the second hydroxycarbonylation step, while CO was deleterious for the first bromination step. Hence, in this practical one‐pot synthesis, Br2 should be consumed in the first bromination step as fully as possible, and CO is introduced after the first bromination step has been completed.

One‐Pot Synthesis of 2,5‐Furandicarboxylic Acid from 2‐Furoic Acid by a Pd‐catalyzed Bromination–Hydroxycarbonylation Tandem Reaction in Acetate Buffer

Incorporation of metal organic framework into mesoporous silica nanoparticles with high contents

Co2 Be a Catalyst? Yes, Evidence from N-Formylation of Aliphatic Amines with Dmf in Presence of Co2

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