Porous Hybrid Nanoflower Self-Assembled from Polyoxometalate and Polyionene for Efficient Oxidative Desulfurization

Abstract

A novel and precise ionic self-assembly (ISA) construction strategy for the self-assembly of polymeric quaternary ammonium salts (polyionene) and Anderson-type polyoxometalate (β-Mo8O26 4–) to form a three-dimensional nanoflower structure was developed successfully and used for oxidative desulfurization (ODS) of fuels for the first time. Furthermore, the morphologies of the self-assembled structures could be precisely regulated by varying the reaction conditions, including the concentrations of the polyionene and temperature. Additionally, nitrogen sorption analysis indicated the porosity with a surface area up to 140 m2 g–1. Remarkably, the nanoflowers showed excellent conversion (98.9%) toward the ODS process with six times of recycling. This could be ascribed to the large amount of active sites dispersed over the relatively high specific area, providing contact with reactants in the ODS process. This facile and innovative fabrication method shed new light on the versatile design and construction of nanostructures.

Three-Dimensional Graphene Oxide Covalently Functionalized with Dawson-Type Polyoxotungstates for Oxidative Desulfurization of Model Fuels

“…However, the combustion of sulfur compounds in liquid fuels may result in the emission of sulfur oxides (SO X ) into the atmosphere, causing acid rain and photochemical smog. SO X can also affect the exhaust gas converter of the automobile, potentially resulting in an increase in the discharge of other pollutants. − Thus, there is a need for deep desulfurization of liquid fuels. The widely used hydrodesulfurization method has some drawbacks that can limit its application such as harsh operating conditions, the requirement of high temperature and pressure, consumption of a large quantity of high purity hydrogen and highly active catalyst, and long reaction time. − Thus, it is practically important to develop non-hydrodesulfurization methods such as oxidative desulfurization (ODS), − extraction desulfurization, , adsorption desulfurization, , biological desulfurization, and photocatalytic desulfurization. , Of these methods, ODS has emerged as a promising method for deep desulfurization of liquid fuels due to mild operating conditions and simple procedures.…”

Removal of SO2 from Flue Gas on a Copper-Modified Activated Coke Prepared by a Novel One-Step Carbonization Activation Blending Method

“…The discharge of sulfur dioxide (SO 2 ) from coal-fired combustion plants has caused serious global environmental problems, such as acid rain, fog, and haze, and has aroused widespread attention. − SO 2 removal from the flue gas by activated carbon and activated coke (AC) was considered one of the most promising methods because AC desulfurization technology can simultaneously remove multiple pollutants, such as NO x , SO 2 , and dioxins. − However, the desulfurization performance of AC was usually poor. , Therefore, the development of an AC material with a high desulfurization performance and low cost became a key point.…”

Organic Solvent-Free Olefins and Alcohols (ep)oxidation Using Recoverable Catalysts Based on [PM12O40]3− (M = Mo or W) Ionically Grafted on Amino Functionalized Silica Nanobeads

“…In most of published experiments, organic solvent was needed, and the catalyst could not be recovered. Few examples described grafted POMs using Merrifield resins [34], polymeric quaternary ammonium salts [98], mesoporous supports [99,100,101], MOFs [102,103] or carbonaceous supports [104]. Mesoporous supports are interesting, but POMs entrapped within zeolites might be not all accessible.…”