Dual‐Function Near‐Infrared Emitting Aerogel‐Based Device for Detection and Sunlight‐Driven Photodegradation of Antibiotics: Realizing the Processability of Silsesquioxane‐Based Fluorescent Porous Materials

Abstract

It is highly desirable to develop facile methods to improve the processability of porous materials for industrial applications. Herein, the preparation of a novel near‐infrared emitting hybrid aerogel (PCS‐CA) is reported by physically blending a porous material with chitosan. The applied porous material (PCS‐CZ‐O‐DCM) is obtained from a near‐infrared emission semiconductor compound (CZ‐O‐DCM) and octavinylsilsesquioxane (OVS). PCS‐CZ‐O‐DCM can detect tetracycline hydrochloride selectively and rapidly in various solution with an extremely low detection limit of 0.29 µm for fluorescence quenching. It also exhibits an outstanding sunlight‐driven photodegradation activity for antibiotics even in the absence of additional oxidation agents or pH control. PCS‐CA also performs better than PCS‐CZ‐O‐DCM powder. A PCS‐CA‐based glass device is further fabricated, which enables a larger amount of water purification of antibiotics by a continuous flow‐through system by light‐driven degradation. By blending with a soft polymer matrix, improved processability can be applied to insoluble porous materials. As a result, a novel functional devices can be realized which provides a new way to apply insoluble porous materials.

Ultrafast and highly selective gold recovery with high capture capacity from electronic waste by upconversion of a silsesquioxane-based hybrid luminescent aerogel

“…The chemical shift at −80.6 ppm was assigned to the Si-linked to the unreacted vinyl groups (Si–CHCH 2 ). 15 Compared with PCS-CZ-B-DCM, the proportion of unreacted vinyl groups in the PCSs@chitosan was significantly reduced, and this was attributed to the thiol–ene reactions of the vinyl groups in PCS-CZ-B-DCM with the sulfhydryl groups in the chitosan–SH.…”

“…S2, ESI†) showed resonance peaks at 107.4–162.7 ppm which corresponded to the C-atoms attached to the sp 3 N-atoms of the carbazole amine moiety and the sp 2 C-atoms of the vinyl groups. 15 Signals at 3–60 ppm corresponded to aliphatic carbons of Si-CH 2 -CH 2 -CZ-B-DCM or Si-CH(CH 3 )-CZ-B-DCM. The characteristic chitosan peaks appeared in the solid-state 13 C-NMR spectrum of PCSs@chitosan, and a new resonance peak at 35.2 ppm belonging to the C-atoms on the C–S–C moieties was also observed, further confirming incorporation of PCS-CZ-B-DCM into the chitosan skeleton.…”

“…7 As a new adsorbent, a fluorescent aerogel exhibits a high catalytic activity, excellent adsorption capacity, and synthetic accessibility, which make it an excellent candidate for photocatalytic reduction material. 15 For example, Wu's team designed a self-assembled MoO 3 -rGO aerogel via a chemical reduction method with GO serving as a precursor and vitamin C as the reductant. With the increase in the content of rGO in the aerogel nanocomposites, the optical absorption ability of MoO 3 -rGO aerogels gradually increased, signifying that the 3D porous scaffold was advantageous for enhanced light absorption and the subsequent photocatalytic reaction.…”

“…21–24 In particular, depending on the configuration of the device, different aerogel configurations can be tailored easily and applied in various industries. 15,25,26 Biocomposites with ideal properties conforming to the definition of “green” are created using natural polysaccharides as the basic material. Owing to its biocompatibility, high biodegradability, non-toxicity and adsorption properties, chitosan has been proved to be a promising environmentally friendly adsorbent material.…”

Near-Infrared-Driven β-NaYF4:Yb,Tm,Gd/Ni-MOF Nanocomposites for Efficient Sterilization and Degradation of Organic Contaminants

“…However, since the XPS valence band spectrum cannot directly reflect the energy band structure, it needs to be corrected by theoretical processing and calculation. As a result, by combining the Tauc plot (Figure b) and the VB XPS spectra (Figure c), the positions of the valence band (VB) and conduction band (CB) can be determined using the formulas formulas italicE NHE / normalV = normalΦ + italicE VBM − 4.44 italicE normalg = italicE VB − italicE CB where E NHE represents the potential of normal hydrogen electrode (NHE), Φ (4.2 eV) represents the electron work function, and E VBM represents the maximum of VB, which is estimated to be 1.40 eV based on the VB XPS spectrum.…”