Mussel‐Inspired Immobilization of Catalysts for Microchemical Applications

Abstract

Immobilization of photocatalytic TiO2 nanoparticles inside PDMS‐based microreactors was successfully attempted by sequential mussel‐inspired surface engineering of microchannels by using CA‐PVP and commercially available TiO2 nanoparticles, respectively. TiO2‐immobilized microreactors accomplished continuous photocatalytic degradation of MB for up to 30 days without releasing TiO2 nanoparticles from the surface of the microchannels, confirming the robustness of TiO2‐immobilization in photocatalysis media. Regeneration of microreactors with diminished photocatalytic activities was also possible with simple strong acid treatment, enabling efficient cleaning of used microreactors.

Highly Efficient Visible Blue-Emitting Black Phosphorus Quantum Dot: Mussel-Inspired Surface Functionalization for Bioapplications

“…The number of catechol groups in single CA-PEG polymer was estimated as 15 from the 1 H NMR spectrum of the prepared CA-PEG (the SI , Figure S10 ). 53 At second, the mussel-inspired surface functionalization of BPQDs with CA-PEG was attempted in a mixed solvent of EtOH and tris-buffered silane (TBS, pH 9.0). After purification by centrifugation and freeze drying, the PEG-modified BPQD (PEG-BPQD) was successfully obtained with >90% yield.…”

Performance of NIR-Mediated Antibacterial Continuous Flow Microreactors Prepared by Mussel-Inspired Immobilization of Cs0.33WO3 Photothermal Agents

“…In this study, catechol-grafted poly­( N -vinylpyrrolidone) (CA-PVP) was employed instead of dopamine or its analogues because precise control of the number density of “glued” nanomaterials on the specific substrate is easily attainable through control of the number of CA moieties in CA-PVP . CA-PVP was synthesized by quaternization reactions between PVP ( M w of 40 000 Da) and CA similarly to previous reports . The intense peaks at 255 and 360 nm in UV–vis spectra represent the existence of a catechol moiety, which indicates π–π* electron transitions in phenolic compounds as shown in Figure S3a.…”

“…In our previous study, mussel-inspired immobilization of photocatalytic TiO 2 NPs inside polydimethylsiloxane (PDMS)-based microreactors was successfully attempted. TiO 2 -immobilized microreactors accomplished continuous photocatalytic degradation of organic dyes for up to 30 days without any noticeable release of TiO 2 NPs …”

Recent Trends in Mussel-Inspired Catechol-Containing Polymers (A Review)

“…More than 93% of photocatalytic degradation efficiency could be reached after three runs with recycled TiONPs/PDA-rGO having 1 wt.% rGO and using UV source. In the same year, the same school 108 disclosed the realization of the PDMS-based microreactors, internally decorated with a catechol-containing polymer (PDA-PVP) (equation 13) which served as a platform for immobilizing TiONPs. The degree of immobilization increased with increasing DAP content in the DAP-PVP material.…”