Hypercrosslinked Polymers Research Articles

Synthesis and enhanced photocatalytic application of porous nanocomposites of (r)GO/TiO2 embedded HCP (hyper crosslinked polymer).

Nanocomposites (r)GO/TiO2/hyper crosslinked polymer (HCP) were prepared using ultrasonic-assisted method, and identified by (SEM), (EDS), (TEM), and (XRD) techniques. This study was performed to examine the effect of various operating parameters on photocatalytic degradation of Rhodamine B (Rh.B) over (r)GO/TiO2 embedded HCP followed by an optimization study using response surface methodology (RSM) based on Box-Behnken design (BBD). The photocatalytic activity of rGO/TiO2/polycalix[4]resorcinarene ((r)GTP) was evaluated using the cationic dye Rhodamine B as a pollutant model under solar light (intensity = 850W/m2) between 10 and 12 am, June, Ahvaz, Iran. Response Surface Methodology was adopted for the optimization of degradation parameters viz pH, dye concentration, and nanocomposites dosage and contact time. The optimum values for the maximum Rhodamine B (Rh B) degradation of rGO/TiO2/polycalix (rGTP) and GTP were obtained, in which the degradation of rGTP was 100% and the degradation efficiency of GO/TiO2/polycalix (GTP) was 70%. ANOVA analysis results demonstrated that irradiation time and nanocomposite mass were the most significant parameters. It was found that rGO/TiO2/polycalix[4]resorcinarene (rGTP) nanocomposite displayed the best degradation yield for the dye. The results showed that the rGTP nanocomposite displayed good EIS and CV properties besides being eco-friendly and reusable. It could also show a high capacity for the elimination of the dye in the industrial wastewaters.

Two Facile Aniline-Based Hypercrosslinked Polymer Adsorbents for Highly Efficient Iodine Capture and Removal

Effective capture and safe disposal of radioactive iodine (129I or 131I) during nuclear power generation processes have always been a worldwide environmental concern. Low-cost and high-efficiency iodine removal materials are urgently needed. In this study, we synthesized two aniline-based hypercrosslinked polymers (AHCPs), AHCP-1 and AHCP-2, for iodine capture in both aqueous and gaseous phases. They are obtained by aniline polymerization through Friedel-Crafts alkylation and Scholl coupling reaction, respectively, with high chemical and thermal stability. Notably, AHCP-1 exhibits record-high static iodine adsorption (250 wt%) in aqueous solution. In the iodine vapor adsorption, AHCP-2 presents an excellent total iodine capture (596 wt%), surpassing the most reported amorphous polymer adsorbents. The rich primary amine groups of AHCPs promote the rapid physical capture of iodine from iodine water and iodine vapor. Intrinsic features such as low-cost preparation, good recyclability, as well as excellent performance in iodine capture indicate that the AHCPs can be used as potential candidates for the removal of iodine from radioactive wastewater and gas mixtures.

Dispersive solid-phase extraction of non-steroidal anti-inflammatory drugs in water and urine samples using a magnetic ionic liquid hypercrosslinked polymer composite

In this work, Friedel-Crafts alkylation was successfully applied to prepare a magnetic ionic liquid hypercrosslinked polymer composite (Fe3O4@IL-HCP), which was subsequently employed as magnetic solid-phase extraction (MSPE) adsorbent for the isolation and enrichment of trace non-steroidal anti-inflammatory drugs (NSAIDs). The developed composite was comprehensively characterized using various techniques, with the results indicating that it possessed high saturation magnetization (39.44 em g − 1), large specific surface area (175 m2g − 1), and high adsorption capacity for NSAIDs. The adsorption behavior and mechanisms were also investigated in detail. NSAIDs were adsorbed onto the Fe3O4@IL-HCP sorbent via a heterogeneous multilayer process consisting of hydrogen bonding and π-π and electrostatic interactions. Additionally, the composite's large surface area and multiple active sites enabled extraction equilibrium within 6 min. By coupling with high performance liquid chromatography (HPLC), the developed MSPE/HPLC method was applied for the determination of selected NSAIDs in water and urine samples. The developed method displayed wide linear ranges, low limits of detection (0.12–0.30 ng mL−1 and 0.15–1.5 ng mL−1 in water and urine samples, respectively), sufficient recoveries (92.8–109%), and good precision (relative standard deviations ≤ 4.6%). Thus, the findings of this work provide an appealing alternative for the extraction and determination of trace NSAIDs in environmental water and biological samples.

Suspension polymerization for synthesis of new hypercrosslinked polymers nanoparticles for removal of copper ions from aqueous solutions

Novel hypercrosslinked polymers nanoparticles (HCPNs) were designed by suspension polymerization technique with high surface area as well as HCPNs with functional groups have the affinity to removal of copper ions from aqueous solutions. Two HCPNs were synthesized through a two-step reaction, initially including the suspension polymerization of N-methacryloxytetrachlorophthalimide (NMTPA) with divinyl benzene (DVB) to give poly(NMTPA-co-DVB) and followed by the treatment of poly(NMTP-co-DVB) with triethylenetetramine (TETA) to give HCPNs (1) and with tetraethylenepentamine (TEPA) to give HCPNs (2). Using scanning electron microscopy and transmission electron microscopy, the surface morphology of the particles of the synthesized HCPNs was detected, and also, the particle size was measured. Also, the chemical structures of the synthesized compounds were illustrated by Fourier transform infrared spectroscopy and 1H-nuclear magnetic resonance (1H NMR). Thermal stability of the synthesized HCPNs was characterized by thermogravimetric analysis. The results illustrated that the particle size of the synthesized HCPNs is in range of 25–50 nm. The synthesized HCPNs compounds were reported for the separation of copper ions from wastewater, in which the results showed a very good affinity for these compounds for separation of copper ions from wastewater.

Synthesis, Characterization, and Gas Adsorption Performance of Amine-Functionalized Styrene-Based Porous Polymers

In recent years, porous materials have been extensively studied by the scientific community owing to their excellent properties and potential use in many different areas, such as gas separation and adsorption. Hyper-crosslinked porous polymers (HCLPs) have gained attention because of their high surface area and porosity, low density, high chemical and thermal stability, and excellent adsorption capabilities in comparison to other porous materials. Herein, we report the synthesis, characterization, and gas (particularly CO2) adsorption performance of a series of novel styrene-based HCLPs. The materials were prepared in two steps. The first step involved radical copolymerization of divinylbenzene (DVB) and 4-vinylbenzyl chloride (VBC), a non-porous gel-type polymer, which was then modified by hyper-crosslinking, generating micropores with a high surface area of more than 700 m2 g-1. In the following step, the polymer was impregnated with various polyamines that reacted with residual alkyl chloride groups on the pore walls. This impregnation substantially improved the CO2/N2 and CO2/CH4 adsorption selectivity.

Synergistic catalysis of hypercrosslinked ionic polymers with multi-ionic sites for conversion of CO2 to cyclic carbonates

High catalytic activity for the conversion of CO2 into cyclic carbonates requires the preparation of porous ionic catalysts with multi-active sites and high ionic density. Herein, a series of hypercrosslinked ionic polymers (HIPs) with multi-ionic sites, high ionic density and hydrogen bond donors (imino group) were synthesized through the one-pot Friedel–Crafts alkylation and post-synthetic strategies. Adsorption measurements showed that HIPs exhibited outstanding CO2 uptakes (1.80−2.97 mmol g − 1, 273 K and 1 bar). Importantly, under the synergistic effects of multi-ionic sites, high ionic density and hydrogen bond donors, the metal-free catalyst HBIM(0.5)@QA-Br showed excellent catalytic yield (99%) and selectivity (99%) for cycloaddition of CO2 with epichlorohydrin at 140 °C, 0.1 MPa CO2 in 2 h. By extending the time appropriately, high catalytic yields (styrene oxide, 140 °C, 4 h, 99% yield; 120 °C, 6.5 h, 93% yield; 100 °C, 16 h, 94% yield) were achieved at low temperature. In addition, the catalyst can be easily reused with stable recyclability. This work not only provides a new strategy to prepare metal-free porous ionic catalysts with multi-ionic sites and hydrogen bond donors but also demonstrated that the synergistic catalysis of multi-ionic sites is helpful to promote CO2 conversion.

A hydrophilic-lipophilic triazine based hyper-crosslinked polymer for efficient enrichment of nitrobenzene compounds

Sensitive, accurate, and simultaneous determination of nitrobenzene compounds (NBs) in environmental water samples is of great significance due to their high risk to human health. In this work, a new triazine-based hyper-crosslinked polymer named CC-Py was constructed via the Friedel-Crafts reaction between cyanuric chloride (CC), pyridine (Py) and 1,2-dichloroethane. Due to its excellent stability, high surface area and hydrophilic-lipophilic (amphiphilic) structure, the CC-Py exhibited a high affinity toward the NBs (nitrobenzene, 2-nitrotoluene, 2,6-dimethylnitrobenzene, 3-nitrotoluene, 4-nitrotoluene, 3-nitrochlorobenzene, 4-nitrochlorobenzene, 2-nitrochlorobenzene, 2,4-dimethylnitrobenzene, 3-nitrobromobenzene, 4-nitrobromobenzene and 4-nitroiodobenzene). Then, a CC-Py based solid-phase microextraction coupled with gas chromatography-flame ionization detection was developed to detect the twelve NBs in real water samples. The results showed that the method had low limits of detection (0.20–0.50 μg L−1), good reproducibility (relative standard deviations (RSDs) < 8.6%) and high enrichment factors (967–1590). The recoveries for the NBs in six different types of water samples were between 90% and 111% with the RSDs less than 7.5%. This work provides a facile and sensitive method for the determination of trace level of NBs in real water samples.

Amphiphilic hypercrosslinked β-cyclodextrin polymers with rigid networks for efficient acteoside separation

In this study, a series of amphiphilic hypercrosslinked β-cyclodextrin polymers (AHβ-CDPs) were synthesized by the hypercrosslinked strategy for acteoside (ACT) separation. Amphiphilic β-cyclodextrin (β-CD) had rigid ring structures, which constructed the rigid networks of AHβ-CDPs. AHβ-CDPs with rigid networks improved adsorption performance for two reasons. On one hand, the hydrophilic ACT was preferentially adsorbed on the hydrophilic outer surface of β-CD, and the hydrophobic molecules were encapsulated in the hydrophobic cavity, improving adsorption selectivity. On the other hand, the constructed rigid networks of AHβ-CDPs with affinity groups provided large specific surface area (1281.16 m2/g) and abundant pore structure, increasing additional transport pathways and affinity sites for enhancing adsorption capacity. The experimental results showed the as-prepared AHβ-CDPs-4 had the highest adsorption capacity of 288.36 ± 2.12 mg/g and the selectivity of 4.36 ± 0.11. Therefore, amphiphilic hypercrosslinked adsorbents with rigid networks had potential application for bioactive components separation from natural products.

Ferrocene-based magnetic hypercrosslinked polymer: A novel magnetic solid-phase extraction adsorbent for chlorophenols

In this work, novel magnetic hypercrosslinked polymers (Fe3O4@BDPF-HCPs) were fabricated by the crosslinking of 1,1′-bis(diphenylphosphino)ferrocene (BDPF) monomer with different external crosslinkers via Friedel-Crafts reaction, followed by modification with Fe3O4 nanoparticles. The Fe3O4@BDPF-HCP-1 was used as a magnetic solid-phase extraction adsorbent to enrich some chlorophenols (CPs) from environmental water, peach beverage and honey samples prior to high performance liquid chromatography analysis. Under the optimum conditions, the target CPs exhibited good linearity with determination coefficient r2 > 0.994. The detection limits of the method (S/N = 3) were 0.03–0.08 ng mL−1 for water, 0.08–0.20 ng mL−1 for peach beverage and 0.3–1.0 ng g−1 for honey sample. The recoveries of CPs in the spiked water, peach beverage, and honey samples were in the range of 80.0 %-112.2 %, 89.0 %-112.2 % and 87.9 %-118.4 %, respectively. The results revealed that the Fe3O4@BDPF-HCP-1 based method can be served as a promising alternative for detection CPs in complex matrix samples.

Cyclotriphosphazene and tricarbazole based microporous hyper-crosslinked conjugated polymer for CCUS: Exceptional CO2 selectivity and high capacity CO2, CH4, and H2 capture

The most significant point in the synthesis of a hyper-crosslinked polymer with high CO2 adsorption and high selectivity properties to be used in carbon capture, utilization and storage (CCUS) is to choose the most compatible core and linker. These should allow the polymer to be synthesized in a single step under the mildest conditions with the highest yield. Here, the synthesis of microporous hyper-crosslinked conjugated polymer EBE-06 was achieved by a single step reaction of hexachlorocyclotriphosphazene and 1,3,5-tri(9H-carbazol-9-yl)benzene with an AlCl3 catalyzed Friedel-Crafts reaction. After being characterized using spectroscopic and analytical techniques, the gas uptake (CO2, CH4, O2, CO and H2) and selectivity properties (CO2/N2, CO2/CH4, CO2/O2 and CO2/CO) of EBE-06 were extensively tested at three different temperatures and up to 1.1 bar pressures. The hyper-crosslinked conjugated polymer EBE-06, formed by the bidirectional bonding of tricarbazole molecules to phosphazene, has a high surface area up to 1987 m2/g and a microporosity ratio up to 82%. In addition, 109 cm3/g CO2 adsorption and 33 cm3/g CH4 adsorption at 273 K and 220 cm3/g H2 adsorption was obtained at 77 K. Exceptional selectivity values were calculated for 05/95 CO2/N2 and reached 442 at 273 K. In addition, the calculation for 05/95 CO2/CH4 resulted in 121 at 273 K. Most importantly, 15/85 CO2/N2 selectivity reached 82 at 298 K, which shows that EBE-06 is an excellent candidate for CCUS processes.

Phenyl-imidazole based and nitrogen rich hyper-crosslinked polymer for sensitive determination of aflatoxins

Using heterocyclic phenyl-imidazole (2-phenylimidazole, 4,5-diphenylimidazole and 2,4,5-triphenylimidazole) as monomer, three novel hyper-crosslinked polymers (PI-HCP, DPI-HCP and TPI-HCP) with large specific surface area and excellent chemical stability were fabricated by Friedel-Crafts reaction. With PI-HCP as solid phase extraction adsorbent, a high performance liquid chromatography-fluorescence detection method was developed for sensitive determination of aflatoxins B1, B2, G1 and G2 in rice and fragrant rice samples. Under optimized conditions, the established method provided wide linear range, low detection limit and satisfactory recovery. Moreover, the adsorption mechanism was also explored. The polar interaction, hydrogen bonding and π-π stacking interactions between PI-HCP and AFs might be the main adsorption mechanisms. This work provides a powerful tool for simultaneous determination of four AFs in food grains with great application potential in AFs monitoring.

Palladium supported on pyrrole functionalized hypercrosslinked polymer: Synthesis and its catalytic evaluations towards Suzuki-Miyaura coupling reactions in aqueous media

Bearing the merits of convenient functionalization and versatile framework composition, hypercrosslinked polymers are employed as promising candidates in green catalysis. In this study, a new hypercrosslinked polymer supported palladium catalyst has been synthesized based on pyrrole functionalization from triphenyl benzene and pyrrole via Scholl reaction and palladium anchoring on the polymer surface. The structure of prepared Pd catalyst was confirmed by TEM, SEM, EDX, XRD, N2 adsorption–desorption, solid state 13C NMR, TGA, FT-IR, XPS, and ICP analyses. The novel complex can be served as an effective catalyst for the preparation of biphenyl compounds with the yields up to 100 % in EtOH: H2O (1:1) at 60 °C by using 0.07 mol% of catalyst in air. More importantly, the catalyst also has significant advantages in terms of facile availability of raw materials, chemical and thermal stability, and cost-effective synthesis. Due to the high specific surface area, and the coordination of pyrrole groups with palladium on the surface of this polymer, this catalyst could effectively prevent palladium leaching (<1.1 %). Furthermore, the catalyst could be recovered by simple centrifugation for four consecutive times. The study provides new insight into the immobilization of palladium on such polymer surface in other heterogeneous catalysis systems.

Synthesis of 2,2‐disubstituted‐2H‐1‐benzopyrans using tetraphenylethylene‐based heterogeneous acidic organocatalyst and the evaluation of their binding interaction with human serum albumin

AbstractA facile method for the synthesis of 2,2‐disubstituted‐2H‐1‐benzopyrans from easily accessible tertiary propargylic alcohols and phenolic derivatives is described using a sulfonated tetraphenylethylene‐based hypercrosslinked polymer (THP‐SO3H) as the heterogeneous organocatalyst. The organocatalyst can be easily recovered by filtration and reused up to five consecutive cycles with nominal loss in catalytic efficiency. The binding interaction of the synthesized benzopyrans with human serum albumin was investigated using fluorescence spectroscopy and molecular docking techniques.

Preparation of magnetic hyper-crosslinked polymer for high efficient preconcentration of four aflatoxins in rice and sorghum samples

Aflatoxins have carcinogenic effect on human health, developing effective adsorbents for their enrichment and detection is particularly required. A magnetic hyper-crosslinked polymer (MHCP-TPE) was prepared and used as a magnetic sorbent to adsorb and isolate aflatoxins from rice and sorghum samples prior to high performance liquid chromatography-fluorescence detection. MHCP-TPE exhibited good magnetic separation ability and reusability, with fast adsorption kinetics and quite good adsorption efficiency for the aflatoxins. At optimized conditions, a sensitive and reliable method was established for the determination of four aflatoxins (B1, B2, G1 and G2) in rice and sorghum samples. The limits of detection were 0.003–0.075 ng g−1 and 0.01–0.25 ng g−1 for rice and sorghum, respectively. Good method recoveries ranging from 83.0 % to 117 % were obtained, with relative standard deviations less than 8.0 %. This method offered a superior alternative to determine trace level of aflatoxins in cereal foods. MHCP-TPE holds great potential in separation science.

Sustainable and green synthesis of porous organic polymer for solid-phase extraction of four chlorophenols in water and honey

A novel hypercrosslinked polymer (API-HCP) was synthesized using as monomer for the first time. API-HCP exhibited high adsorption affinity toward chlorophenols due to the hydrogen bond, halogen bond and π-stacking interactions. With API-HCP as adsorbent, an efficient solid phase extraction method coupled with high performance liquid chromatography (SPE-HPLC) was established for the sensitive detection of chlorophenols in water and honey samples. Under the optimum conditions, the method provided a good linear response in the range of 0.07–100 ng mL−1 for water and 1.7–500 ng g−1 for honey sample. High sensitivity was achieved, with detection limits (S/N = 3) of 0.02–0.07 ng mL−1 for water and 0.5–1.5 ng g−1 for honey samples. The method recoveries for spiked sample were between 84.0 % and 116.0 %, with relative standard deviations ≤6.1 %. The API-HCP based SPE-HPLC method provided a robust platform for sensitive determination of chlorophenols in water and honey samples.

A monolith adsorbent of hyper-crosslinked polymer, graphene oxide composite chitosan cryogel for in-syringe solid phase extraction of furfural derivatives from cellulosic biomass hydrolysate

A porous composite monolith adsorbent of hyper-crosslinked polymer, graphene oxide and chitosan cryogel was fabricated for the extraction of furfural and 5-hydroxymethyl-furfural from cellulosic biomass hydrolysate. The composite adsorption materials synergistically enhanced the adsorption of furfural compounds and the porous chitosan cryogel helped to entrap and prevent the loss of the adsorbent composite. The composite monolith adsorbent was in-situ fabricated in a needle hub assembled with a disposable syringe performing in-syringe solid phase extraction. The extracted furfural compounds were quantified by high performance liquid chromatography. The fabricated adsorbent was characterized and the extraction conditions were optimized to achieve the best extraction recovery. In the optimum condition, the developed analytical approach provided linear from 1.0 to 50 ng/L for furfural and 0.5 to 50 ng/L for 5-hydroxymethyl-furfural, with respective detection limits of 0.25 ng/L and 0.20 ng/L. The developed approach was employed for the determination of furfural and 5-hydroxymethyl-furfural extracted from biomass hydrolysate of empty palm fruit bunch cellulose with satisfactory relative recoveries from 90.6 to 101.6 % with the RSDs below 6 %. The developed composite monolith adsorbent is easy to prepare and the extraction format is convenient to use. The good stability of the composite monolith adsorbent enabled reusability for 20 extraction-desorption cycles.

Non-negligible Influence of Oxygen in Hard Carbon as an Anode Material for Potassium-Ion Batteries.

The development of potassium-ion batteries (PIBs) has been impeded by the lack of an appropriate carbon anode material that could accommodate K+ with a large ionic radius. Hard carbon with low cost and larger interlayer spacing is a promising anode material for PIBs. However, the impact of oxygen-containing functional groups in hard carbon (HC) is less reported. Herein, a hypercrosslinked polymer (HCLP) is prepared and used for the synthesis of microporous hard carbons with superior structural stability and abundant oxygen-containing functional groups and defects, in which the crosslinking agent provided copious oxygen atoms. It is found that a large number of C═O groups and micropores provide more storage sites for K+. The surface-controlled process is dominated by the reversible reaction of C═O + K+ + e- ↔ C-O-K, which directly increases the capacity contribution. The HCs obtained at 600 °C exhibit good cycling and rate performance with an initial specific capacity of about 254.3 mAh g-1 and the capacity retention of 83.2% after 200 cycles at 50 mA g-1. The capacity reached up to 121 mAh g-1 at 2 A g-1. A possible capacitive-adsorption mechanism is proposed by kinetic analysis. The redox reaction mechanism between C═O and K+ at the HC is clearly also revealed.

Design of hyper-cross-linked polymers with tunable polarity for effective preconcentration of aflatoxins in grain

Aflatoxins (AFs) as a category of polar mycotoxins possess a significant threat to human health. However, constructing of sorbents with suitable polarity for the preconcentration of AFs remains poorly developed due to the difficulty in tuning the polarity of the sorbents optionally. Herein, a series of novel hypercrosslinked polymers (OP-HCPs) with adjustable polarity were designed and synthesized by varying selection of alkylphenol ethoxylates monomers and benzyl halides crosslinkers for the preconcentration of AFs. By integration of magnetism into OP-HCP, a novel magnetic sorbent (M-OP10-DCX) was prepared to readily pre-concentrate of AFs from rice and maize samples prior to high performance liquid chromatography-fluorescence detection (HPLC-FD). Benefiting from the unique polarity interaction between M-OP10-DCX and AFs, the M-OP10-DCX displayed excellent adsorption ability for the AFs. Good linearity in the range of 5.0–4000 pg g−1 (R2 > 0.9983), low limits of detection (signal-to-noise ratio of 3) of 1.5–50 pg g−1 and high enrichment factors of 105–205 were achieved. The recoveries of the method ranged from 82.8 % to 115 % with the relative standard deviation less than 8.0 %. This work provided a new strategy for the rational design of HCPs with tunable polarity as valuable tools for specific adsorption of different kinds of compounds.

Alkaline metal ion permeation through amorphous carbon membranes with varying degree of graphitization

Amorphous carbons are prospective materials for the selective separation of alkaline metals ions due to their wide range degree of organization. To demonstrate so, a study of the drift of ion alkaline ion (H+, Li+, Na+, and K+) at different applied electric fields (0.8–3 V) for a series of amorphous carbon with different degrees of organization must be performed. Amorphous carbon membranes were synthesized from hyper cross-linked polymer precursors poly(acrylic acid) hyper cross-linked with polyvinyl alcohol. The amorphous carbon membranes were synthesized at pyrolysis temperatures of 400, 500, 600, and 700 °C. Pyrolysis temperature can cause changes in the structure of the monolithic membranes, such as changes in graphitization degree, hydrophobicity, and textural features, like pore volume and pore size. Hydrophobicity degree has also increased with the increase of pyrolysis temperature. Permeability of ions across membranes was assessed using ionic conductivity, which was calculated for chronoamperometric measurements. Besides, the influence of the electric field on the permeation of the ions was evaluated. Based on the results, amorphous carbon membranes can show great performance in lithium separation from other alkaline metal ions. In the best case, the mobility of Li+ becomes two times faster than the mobility of K+ and Na+.

Tannic acid-based hypercrosslinked polymer as heterogeneous catalyst for aerobic oxidation reaction

Hypercrosslinked polymers (HCPs) are a type of porous organic materials with high surface area and maneuverable preparation process. Metal-functionalization is a popular and effective post-synthesis modification strategy to construct catalytically active HCPs. Tannic acid (TA) is a biomolecule containing multiphenol moieties that possess the ability to conduct Friedel–Crafts alkylation reaction and metal-bonding active sites. We utilized TA to prepare the hypercrosslinked polymer (TA-HCP) with 1,2-dichloroethane as the crosslinker. After post-synthesis reaction, the vanadium-functionalized TA-HCP-VO was obtained with well-maintained chemical structure and moderate surface area. TA-HCP-VO exhibits an excellent catalytic performance in thioether oxidation reaction to produce sulfoxide compounds. Various thioether substrates with different substituents are transformed to sulfoxide products with high conversion rates (99%) and selectivities (86–95%) under the catalysis of TA-HCP-VO. Furthermore, heterogeneous TA-HCP-VO retains fine catalytic activity and chemical structure after four cycling reactions, which demonstrates the superiority of heterogeneous porous catalysts. • A biomolecule, tannic acid, is used to prepare hypercrosslinked polymer, TA-HCP. • Phenol moieties in TA-HCP act as reactive sites in post-synthesis modification. • Vanadium is facilely immobilized onto TA-HCP to form catalytic TA-HCP-VO. • TA-HCP-VO shows excellent catalytic performance in thioether oxidation reaction.