Triazine‐Functionalized Silsesquioxane‐Based Hybrid Porous Polymers for Efficient Photocatalytic Degradation of Both Acidic and Basic Dyes under Visible Light

Abstract

Four triazine-functionalized silsesquioxane-based hybrid porous polymers (TSHPPs) were synthesized by Heck reaction of octavinylsilsesquioxane (OVS) with brominated phenyl or thiophene substituted triazine monomers. These hybrid polymers offered good thermal stability, high specific surface areas (up to 555 m 2 g À 1 ), strong visible light absorption, and adjustable fluorescence properties. The materials showed high photocatalytic activity for the degradation of both acidic and basic dyes without additional oxidation agents or pH adjustments.Exposing to natural light, at a very low concentration of TSHPPs (0.2 mg mL À 1 ), dyes with a concentration of up to 1000 ppm can be completely decolorized. After five consecutive iterations of degradation dyes, TSHPPs still showed good regenerability. This work provides an efficient method for the construction of photo-responsive porous materials for solar-to-chemical energy conversion and demonstrates their potential as green and sustainable environment-friendly catalysts.

Unconventional conjugation in macromonomers and polymers

“…Hence they have been extensively studied for their structural properties and multiple reviews and one book have appeared in the last 30+ years. [81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96] Also of note is the fact that germanium analogs have been prepared that also exhibit evidence of a cage centered LUMO in (cyclohexylGeO 1.5 ) 6 and (n-OctylGeO 1.5 ) 6 suggesting the existence of semiconducting behavior extends to other related structures. 97 Our original interest in these compounds extends from their high symmetry and approximately one nanometer diameters as potential nanobuilding blocks, especially the octaphenyl silsesquioxane, [PhSiO 1.5 ] 8 , OPS.…”

“…Hence they have been extensively studied for their structural properties and multiple reviews and one book have appeared in the last 30+ years. 81–96 Also of note is the fact that germanium analogs have been prepared that also exhibit evidence of a cage centered LUMO in (cyclohexylGeO 1.5 ) 6 and ( n -OctylGeO 1.5 ) 6 suggesting the existence of semiconducting behavior extends to other related structures. 97…”

Covalent triazine frameworks for the dynamic adsorption/separation of benzene/cyclohexane mixtures

“…[11][12][13][14][15] In addition, covalent triazine frameworks (CTFs) [16][17][18] are another type of promising POP with high nitrogen content, easy availability of starting materials, and low-cost synthesis, and have been demonstrated to provide excellent adsorption performance, such as in CO 2 adsorption/ separation, [19][20][21][22][23][24] SO 2 capture, 25,26 and catalysis applications. [27][28][29] Moreover, CTFs have been fabricated via numerous synthetic strategies, such as ionothermal trimerization, 18 using phosphorus pentoxide (P 2 O 5 ) catalysts 30 and superacid catalysts, 31 amidinebased polycondensation, 32 and Friedel-Crafts reactions. 5,23,33 Among these strategies, Friedel-Crafts reactions are particularly advantageous owing to their relatively low reaction temperatures and short polymerization times.…”

Emulsion-Templated Porous Polymers for Efficient Dye Removal

“…Therefore, it is necessary to remove methylene blue from aqueous solutions. A number of different technologies − have been developed to recover and reduce dyes from wastewater, such as photocatalytic degradation of dye contaminants with TiO 2 immobilized on Zsm-5 zeolite modified with nickel nanoparticles and efficient degradation and detoxification of methylene blue dye by a newly isolated ligninolytic enzyme producing bacterium Bacillus albus Mw407057, silsesquioxane-based hybrid materials. , One approach has been the use of porous polymers with various functional groups . In this way, efficient dye removal is possible without producing secondary pollution. , Polymeric adsorbents have been widely used to remove dyes very effectively and even selectively through physical dye removal.…”