Anti-nonspecific adsorption segments-assisted self-driven surface imprinted fibers for efficient protein separation

At present, the development of high-performance protein imprinted materials is still a research hotspot in the field of protein imprinting. Herein, anti-protein adsorption segment (CBMA)-assisted self-driven BSA surface imprinted fibers MTCFs@SIP@CBMA with high recognition selectivity are pioneered using the strategies of combining magnetic nanomaterial surface imprinting technique with amino-Michael addition. The special structure of the carrier MTCFs endows MTCFs@SIP@CBMA with magnetic performance and self-driven adsorption performance, which simplifies the separation process while improving the adsorption capacity and accelerating the adsorption rate. The adsorption capacity for BSA reached 395.26 mg/g within 30 min. The introduction of CBMA segments on the surface after imprinting by amino-Michael addition makes its polymer chain length and position controllable. Under the strongest anti-nonspecific adsorption effect, MTCFs@SIP@CBMA exhibit excellent specific identification to BSA from mixed proteins. Additionally, MTCFs@SIP@CBMA show considerable reusability. Therefore, MTCFs@SIP@CBMA are expected to be applied in efficient separation of proteins in biological samples.

Ion-Imprinted Polymer Modified with Carbon Quantum Dots as a Highly Sensitive Copper(II) Ion Probe

Fluorescence analysis technology and ion imprinting technology are combined to prepare a copper ion fluorescence sensor. Carbon quantum dots (CQDs), with a quantum yield of 79%, were synthesized by a hydrothermal process using citric acid as the carbon source. The prepared CQDs, acting as the fluorophore, were grafted onto the surface of an SBA-15 mesoporous molecular sieve by an amidation reaction. Then, the fluorescent sensor CQDs@Cu-IIP was prepared using a surface imprinting technique with the modified SBA-15 as the substrate, copper ions as a template, tetraethoxysilane as the crosslinker, and 3-aminopropyl-3-ethoxysilane as the functional monomers. The sensor showed strong fluorescence from CQDs and high selectivity due to the presence of Cu(II)-IIP. After the detection conditions were optimized, the fluorescence intensity of the sensor had good linearity with Cu(II) concentration in a linear range of 0.25–2 mg/L and 3–10 mg/L. This CQDs@Cu-IIP was applied to the determination of traces Cu(II) in real water samples and good recoveries of 99.29–105.42% were obtained. The present study provides a general strategy for fabricating materials based on CQDs for selective fluorescence detection of heavy metals.

Enhanced Selectivity for Oriented Catalyzing Tetracycline by the Functional Inorganic Imprinted ZnFe2O4@Ag3PO4/SiO2 Photocatalyst with Excellent Stability

A novel functional inorganic imprinted ZnFe2O4@Ag3PO4/SiO2 photocatalyst was synthesized by a facile sol–gel method combined with the surface imprinting technique, which possessed excellent stability. By optimizing the amount of materials, we determine the preferable addition amounts of tetraethoxysilane (TEOS) and tetracycline to be 0.06[Formula: see text]mL and 0.06[Formula: see text]g, respectively. This as-prepared functional inorganic imprinted ZnFe2O4@Ag3PO4/SiO2 photocatalyst was proved to not only exhibit high photocatalytic activity (the photodegradation rate was 61.52% under the simulated sunlight irradiation of 60[Formula: see text]min), but also possess a strong oriented ability to selectively recognize and photocatalyze tetracycline (the coefficient of selectivity ([Formula: see text] was 5.14 for ciprofloxacin and 3.63 for gatifloxacin). Moreover, the functional inorganic imprinted ZnFe2O4@Ag3PO4/SiO2 photocatalyst prepared with SiO2 as the inorganic imprinted layer has good stability and can be recycled many times. This work not only puts forward a novel design idea of functional semiconductor materials but also is expected to be widely applied to the oriented catalysis for a target substance according to the practical requirement.

Enhanced Photocatalytic Activity and Selectivity of a Novel Magnetic PW@PEDOT Imprinted Photocatalyst with Good Reproducibility

The novel magnetic PW-doped PEDOT (PW@PEDOT) imprinted photocatalyst with good reproducibility was prepared by the surface imprinting technique and microwave heating method. Due to the existence of PW@PEDOT and imprinted cavity in the imprinted layer, the as-prepared magnetic PW@PEDOT imprinted photocatalyst not only had higher photocatalytic activity, but also had the excellent specific recognition ability for selective photodegradation of TC. This paper proposed a new idea to prepare the imprinted photocatalysts.

A study on the preparation and application of a core–shell surface imprinted uranyl magnetic chelating adsorbent

A core shell UMCA was synthesized using surface imprinting technique. UMCA was used for the determination of uranyl by SPE coupled with fluorimetry. This as-prepared UMCA exhibits high adsorption capacity, good extraction performance and stability.

Microwave-hydrothermal synthesis of a novel, recyclable and stable photocatalytic nanoreactor for recognition and degradation of tetracycline

A unique Ppy@CdS/ZnFe2O4 nanoreactor is fabricated via the microwave-hydrothermal method and surface-imprinting technique, which effectively enhances the recyclability, stability, and selectivity for recognition and degradation of tetracycline under visible-light irradiation.