Engineering exposed vertical nano-TiO (001) facets/BiOI nanosheet heterojunction film for constructing a satisfactory PEC glucose oxidase biosensor.

In the field of photoelectrochemical (PEC) enzyme biosensors, constructing efficient photoelectrodes, in which the recombination of photogenerated carriers is an important factor affecting the performance, is of great significance. Herein, to enhance the separation efficiency of photogenerated carriers, titanium dioxide (TiO) nanosheet (NS)/bismuth oxyiodide (BiOI) NS/glucose oxidase (GOx) composites were prepared hydrothermal and solvothermal methods. Single-crystal anatase TiO NSs with a high percentage of (001) facets lead to better photocarrier separation due to heterojunctions between facets.

Gold and Platinum Nanoparticle-Functionalized TiO Nanotubes for Photoelectrochemical Glucose Sensing.

Developing stable photoelectrochemistry (PEC) glucose biosensors with high sensitivity and a low detection limit is highly desirable in the biosensor field. Herein, a highly sensitive and stable enzymatic glucose PEC biosensor is rationally designed and fabricated using a TiONTs/Au/Pt/GOx electrode. First, we prepared one-dimensional TiO nanotube arrays which could realize the orthogonalization of the light-incident direction and the carrier diffusion direction via anodization.

Photoelectrochemical Enzyme Biosensor Based on TiO Nanorod/TiO Quantum Dot/Polydopamine/Glucose Oxidase Composites with Strong Visible-Light Response.

Although photoelectrochemical (PEC) enzyme biosensors based on visible-light detection would have a high practical value, their development has been limited by the weak visible-light response of available photoactive substrates. Here, to enhance the visible-light response of a photoelectric substrate, a TiO nanorods (NRs)/TiO quantum dots (QDs)/polydopamine (PDA)/glucose oxidase nanocomposite was prepared hydrothermal synthesis, followed by photopolymerization. TiO QDs with strong light absorption and excellent photocatalytic activity were introduced between the TiO NRs and the PDA.

Combined effects of jarosite and visible light on chalcopyrite dissolution mediated by Acidithiobacillus ferrooxidans.

Although jarosite and visible light are important factors for the formation of acid mine drainage (AMD), the effects of combined jarosite and visible light on chalcopyrite biodissolution have not been explored until now. In order to fill this knowledge gap, the combined effects of jarosite and visible light on chalcopyrite dissolution mediated by Acidithiobacillus ferrooxidans were investigated. The results indicated that jarosite and visible light could significantly accelerate chalcopyrite biodissolution, thus releasing more copper ions, iron ions and producing more acid.