Spherical montmorillonite-supported molybdenum disulfide nanosheets as a self-sedimentary catalyst for organic pollutants removal

Highly Efficient Silver Catalyst Supported by a Spherical Covalent Organic Framework for the Continuous Reduction of 4-Nitrophenol

“…The reduction process was monitored by the change in UV−vis absorbance at wavelengths of 300 and 400 nm. 51 During the catalytic reduction process, the color of the 4-NP solution changed from greenyellow to colorless. Correspondingly, the characteristic absorbance of 4-NP at 400 nm rapidly decreased to 0 within 5 min and the characteristic absorbance of the reduced product 4-AP gradually increased at 300 nm (Figure 3a).…”

“…Nevertheless, treatment is still expensive because abundant equipment is involved. 51 In addition, catalyst separation from the mixture and reuse process would also reduce the treatment efficiency. Therefore, developing a novel technology for the highly efficient treatment of toxic organic pollutants is highly desirable.…”

“…After recycling 5 times, the catalytic activity was almost unaltered, exhibiting good stability. Nevertheless, treatment is still expensive because abundant equipment is involved . In addition, catalyst separation from the mixture and reuse process would also reduce the treatment efficiency.…”

Towards application of a covalent organic framework-silver nanoparticles@sand heterostructure as a high-efficiency catalyst for flow-through reduction of organic pollutants

“…Firstly, organic pollutant 4-NP was selected as the model due to its high toxicity and stability [26,27]. The transform of 4-NP to less toxic 4-aminophenol (4-AP) through the noble metal catalyst in the presence of NaBH 4 is an effective approach to reduce the environmental risk and realize the reuse of hazardous waste [28]. The catalytic process was monitored by UV-vis spectroscopy.…”

Towards mass production of a spherical montmorillonite@covalent organic framework@gold nanoparticles heterostructure as a high-efficiency catalyst for reduction of methylene blue

“…In our previous work, porous spherical montmorillonite (SMt) prepared with the granulation of Mt. through spraydrying technology owning the characteristics of large surface area, strong adsorption ability, and outstanding acid-base stability (Wang et al, 2020;Xiao et al, 2018). Different from the pristine Mt.…”