Chemically Deposited Sol–Gel Film on Porous TiO2 Nanotube Arrays as an Efficient and Unbreakable Solid-Phase Microextraction Fiber

Novel copper sulfide doped titania nanoparticles as a robust fiber coating for solid-phase microextraction for determination of polycyclic aromatic hydrocarbons

“…33 Apparently, the crystal structure of TiO 2 changed during annealing. The oil absorption of rutile TiO 2 (16-48) was higher than that of anatase TiO 2 (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), while the Mohs hardness of rutile TiO 2 (6-7.5) was also higher than that of anatase TiO 2 (5.5-6). As a result, the change of morphology and strength of TiO 2 NPs aer high temperature annealing was benecial to the modication and application of ber coating.…”

“…[13][14][15][16][17] Bulk heterojunctions with three-dimensional nanostructures have attracted tremendous attention in SPME, because of their larger specic surface, diverse chemical design and inexpensive solution-based process. [18][19][20] To utilize the oriented feature of TiO 2 nanoparticles (TiO 2 NPs), an emerging concept is to modify the nanoparticles with various nanoparticles, and thus forming a heterojunction. Some variety of approaches have been deployed, such as chemical deposition, 21 solvothermal treatment, 22 spotting sample method, 23 chemical precipitation, 24 and electrodeposition.…”

Aramid-wrapped CNT hybrid sol–gel sorbent for polycyclic aromatic hydrocarbons

“…16 Owing to the presence of PAHs in trace quantity in the matrix, an effective enrichment method should provide good accuracy, analytical microextraction performance, stability, selectivity, and loading capacity. [17][18][19][20][21][22] However, some of these methods are time-consuming, lack automation or portability, and some consume large amounts of solvents. Therefore, innovations in solid-phase microextraction, which is a simple, portable, solvent-less and non-exhaustive method, are continuously needed to nd new sorbents that are capable of providing enhanced analytical performance.…”