Engineered Smart Gating Nanochannels for High Performance in Formaldehyde Detection and Removal

Abstract

Bioinspired nanochannels for smart mass transport control have shown great potential for various applications in nanofluids, biosensing, and separation. Here, a nanochannel-based smart responsive platform exhibiting high formaldehyde (HCHO) sensitivity is designed and successfully fabricated by functionalizing the inner pore surface with ethylenediamine (EDA). By employing the nucleophilic addition reaction between HCHO and EDA immobilized on the nanochannels, the artificial nanochannels can switch from an open state to a closed state with the increase in HCHO. This is because the surface charge density and the wettability of the nanochannels change along with the HCHO immobilization. Meanwhile, the EDA-functionalized platform can hold a large amount of HCHO due to the abundant nanochannels of the membrane, so it presents a significant ability to remove HCHO in complex matrices. Also, the cultivation of mesenchymal stem cells in media containing HCHO can achieve excellent vitality in the presence of the EDA-functionalized nanochannels materials. This work paves an avenue for designing and developing bioinspired nanochannel based platform for harmful compounds detection and removal.

Flexible and Reusable Ag Coated TiO2 Nanotube Arrays for Highly Sensitive SERS Detection of Formaldehyde

“…Formaldehyde (FA), a colorless molecule that is a strong irritant, is a major hazard to human health and has been identified as a carcinogen [1][2][3]. The commercial product is an aqueous solution, and a 35-40% aqueous solution is commonly called formalin [4,5]. At present, many FA detection methods have been studied, including high-performance liquid chromatography (HPLC) [6], gas chromatography-mass spectrometry (GC-MS) [7], and fluorescence analysis [8].…”

Catalytic confinement effects in nanochannels: from biological synthesis to chemical engineering

“…5c). 83 The interaction of HCHO molecules with EDA tethered on the inner surface of nanochannel caused the changes in ion current and the CCE increased the detecting sensitivity and selectivity of HCHO molecules. Compared to the nanochannel membrane, Zhan et al used the ions recognition of nanochannels to develop a single conical glass nanochannel with tannic acid that could achieve highly sensitive metal ion detection based on the CCE (Fig.…”

Rational ion transport management mediated through membrane structures

“…Nanochannel-structured membranes have already shown great application potential in sensing external ions, [159,308,309] molecules, [310][311][312][313][314][315] and stimuli. [45,241] For example, Wu et al constructed nanochannels characterized by enhanced ion transport and selective detection of modified 5hydroxymethylcytosine in single-stranded DNA (i.e., DNA2-Bzim) through embedded short single-wall CNTs in a lipid bilayer (Figure 16E).…”