Systematic comparison of sono-synthesized Ce-, La- and Ho-doped ZnO nanoparticles and using the optimum catalyst in a visible light assisted continuous sono-photocatalytic membrane reactor

Fabrication, functionalization and performance of doped photocatalysts for dye degradation and mineralization: a review

“…Still, Das and Mahalingam (2020) reported that use of doped photocatalysts and waste polystyrene as a potential substrate under sunlight could bring more advantages to the system in its being then cost-efficient and eco-friendly. In an earlier study, Sheydaei et al (2019) synthesized Ce-, La-and Hodoped ZnO photocatalyst to be used in a continuous-flow sono-photocatalysis/membrane separation reactor for the visible light sono-photocatalytic removal of Reactive Orange 29. This study was particularly interesting in its scope to taken into account a large number of process parameters and undertake a Taguchi optimization of the photocatalysis process run in the sono-photocatalysis/membrane separation.…”

“…U.S. Patent Application 15/924,255; https ://paten ts.googl e.com/ paten t/US201 80265 382A1 /en) developed a system for Fig. 18 Mechanism for the degradation of Reactive Orange 29 via the sono-photocatalysis process (based on GC-MS data) proposed by Sheydaei et al (2019). According to the latter workers, the sono-photocatalytic degradation of RO29 under optimized conditions brought a 50% removal of chemical oxygen demand, and a total organic carbon removal of 45% (under the best operational conditions) which was considered a relatively high degree of mineralization.…”

“…According to the latter workers, the sono-photocatalytic degradation of RO29 under optimized conditions brought a 50% removal of chemical oxygen demand, and a total organic carbon removal of 45% (under the best operational conditions) which was considered a relatively high degree of mineralization. This figure has been reproduced from Sheydaei et al (2019) with the permission of Elsevier (© 2019 Elsevier B.V. All rights reserved) under licence number 4855170883735 (for both print and electronic formats) Fig. 19 a Arrangement of PET bottles in PET flow reactor with about 160 cm 2 of PET area removed from the side of every of the two PET bottles horizontally aligned so as to enable direct light harvesting in solution and b modified PET flow reactor configuration whereby bottoms of both PET bottles have been joined horizontally in view of avoiding junction of tops in design shown in a (a zone whereat no reaction is expected because of a paucity in light penetration) developed by Do Nascimento et al (2019).…”

Preparation of Sulfonated Polyarylene Ether Nitrile Hollow Fiber Membrane Adsorbent and Its Potential in Separation Lithium Ion from Brine

“…For example, spherical, [28] polymer net [29,30] and membrane adsorbents. [31,32] The hollow fiber membrane has some unique advantages, including low pressure drive, good structural stability, high porosity and exposure of more adsorption sites, so they have great potential in the field of adsorption and separation. [33,34] Polymer with functional groups, such as sulfonic acid, amidoxime, carboxyl and phosphate groups, can form complexes with metal ions, so as to realize the selective separation of metal ions.…”

“…In addition, a functionalized porous polymer adsorbent is usually prepared to improve the adsorption performance of the adsorbent. For example, spherical, [28] polymer net [29,30] and membrane adsorbents [31,32] . The hollow fiber membrane has some unique advantages, including low pressure drive, good structural stability, high porosity and exposure of more adsorption sites, so they have great potential in the field of adsorption and separation [33,34] …”