Preparation of a TiWO/TiO nanocomposite interfacial photocatalyst and its photocatalytic degradation of phenol pollutants in wastewater.

A TiWO/TiO nanocomposite interfacial photocatalyst was designed and prepared for the photocatalytic degradation of phenol pollutants in wastewater. The detailed properties of the TiWO/TiO nanocomposite interface (NCI) were analyzed by XRD, SEM, EDX, DRS, UPS and XPS technologies, showing that anatase TiO nanospheres (NSs) were uniformly dispersed on the surface of rutile TiWO nanoparticles (NPs) and formed the nanocomposite interface. The DRS and UPS results of 5 wt% TiWO/TiO NCI indicated a greatly broadened light response range with a wavelength shorter than 527 nm and a shorter band gap energy of 2.

Giant Microgels with CO-Induced On-Off, Selective, and Recyclable Adsorption for Anionic Dyes.

Adsorbents that are capable of controllable pollutants adsorption and release without secondary pollution are attractive in water treatment. Here, we propose eco-friendly CO as a trigger to switch the charge states and collapse-expansion transition of giant microgels consisting of hydrophilic acrylamide and hydrophobic 2-(diethylamino)ethyl methacrylate and demonstrated the on-off, selective, and recyclable adsorption of anionic dyes on microgels under CO stimulation. Apart from easy-handling separation from the water by a simple filtration process, the maximum adsorption capacity is as high as 821 mg g, and the adsorption isotherms and kinetics obeyed Langmuir isotherm and the pseudo-second-order kinetics models, respectively.

Macroporous monoliths with pH-induced switchable wettability for recyclable oil separation and recovery.

Hypothesis: The effective separation and recovery of oils from water is important for the protections of ecosystems and the environment. Polymeric porous monoliths have been demonstrated as attractive absorbents for oil/water separation. However, the recyclability was mainly realized by squeezing, combustion, or centrifugation, which may restrict in elastic materials, destroy the adsorbates or need special apparatus.

Preparation of cobalt-tetraphenylporphyrin/reduced graphene oxide nanocomposite and its application on hydrogen peroxide biosensor.

A novel cobalt-tetraphenylporphyrin/reduced graphene oxide (CoTPP/RGO) nanocomposite was prepared by a π-π stacking interaction and characterized by ultraviolet-visible absorption spectroscopy (UV-vis), Fourier transform infrared spectroscopy (FTIR) and electrochemical impedance spectroscopy (EIS). The CoTPP/RGO nanocomposite exhibited high electrocatalytic activity both for oxidation and reduction of H2O2. The current response was linear to H2O2 concentration with the concentration range from 1.

Bilayer lipid membrane biosensor with enhanced stability for amperometric determination of hydrogen peroxide.

In this paper, a polydopamine (PDA) film is electropolymerized on the surface of bilayer lipid membrane (BLM) which is immobilized with horseradish peroxidase (HRP). The coverage of the PDA film on HRP/BLM electrode is monitored by electrochemical impedance spectroscopy (EIS). The electrocatalytic reduction of H(2)O(2) at the PDA/HRP/BLM electrode is studied by means of cyclic voltammetry (CV).

Improvement of amperometric glucose biosensor by the immobilization of FcCD inclusive complex and carbon nanotube.

A novel glucose biosensor was constructed by using ferrocene-carbonyl-beta-cyclodextrin (FcCD) inclusive complex as electron-transfer mediator and carbon nanotubes (CNTs) as electron-transfer promoter. FcCD inclusive complex and glucose oxidase (GOx) were covalently bonded to CNTs by poly-l-lysine (PLL) to fabricate a glucose biosensor. The electrocatalytic oxidation of glucose at the biosensor occurred at low potential below 200 mV, avoiding the interference of the main interfering substances in real samples containing a 5-times higher concentration of l-cysteine, ascorbic acid, and uric acid.