Self-enhanced photoelectrochemical sensor based on a Schottky heterostructure organic electron donor matrix

Abstract

A self-enhanced photoelectrochemical copper ions sensor was constructed using an organic electron donor matrix with Schottky heterostructure prepared by dopamine and single walled carbon nanohorns. The determination in a non-additional...

Self-Enhanced Antibacterial and Antifouling Behavior of Three-Dimensional Porous Cu2O Nanoparticles Functionalized by an Organic–Inorganic Hybrid Matrix

“…Cu 2 O-0@R-Gel induces electron transfer effects during the reversible autoxidation of Cu 2 O and R-Gel, blue-shifting 1641–1650 cm –1 . Around 2850 and 2920 cm –1 belong to the symmetric and antisymmetric stretching vibrations of CH 2 , respectively . Around 3431 cm –1 is the stretching vibration of H 2 O caused by adsorbed water.…”

“…Modification and encapsulation on the surface of GO using P-P stacking or strong covalent bonding interactions yielded rGO@R-Gel. − After that, the unreduced oxygen-containing functional group of rGO and the catechol group of R-Gel provide the reaction sites to anchor diffusible Cu 2+ , thus making rGO and R-Gel ideal template materials for the in situ nucleation and growth of Cu 2 O for controlled homogeneous dispersion (Figure S8) and controlled release of Cu 2 O. In particular, R-Gel, as a multifunctional platform for rGO functionalization, can promote the electron transfer from R-Gel to Cu 2+ , drive the diffusion of Cu ions, and induce better antifouling and antibacterial effects of Cu 2 O . The 3DNP-Cu 2 O/rGO x @R-Gel was organized to establish a self-improving antibacterial and antifouling system.…”

“…to form non-covalent coordination complexes and improve the metal/oxide dispersion but also allows PDA to assume the electron donor structure and act as a channel for charge transfer to prevent the oxidation of naked metal ions. Thus, the antibacterial effect of the composites can be exploited to a greater extent. ,,− In addition, the hydrogen bonding in PDA and its interactions with metal ions also confer excellent self-healing properties to PDA and its derivatized materials. , Considered together, PDA can be used as an important building block to assist antibacterial agents to perform higher bactericidal efficiency, combined with highly hydrophilic components to stimulate and protect the potential antibacterial ability of antibacterial agents.…”

Highly Sensitive Photoelectrochemical Immunosensor Based on Organic Multielectron Donor Nanocomposite as Signal Probe

“…22 It is prone to form electron donor nanopolymers with conjugate structures via oxidative self-polymerization, usually serving as photoelectron transport channels, which indicates a good candidate of DA in the design of novel PEC materials. 23,24 A graphite carbonitride nanosheet (g-C 3 N 4 ) with a twodimensional atomic thin layer structure, as another kind of electron-rich material, possesses the merits of simple preparation, large adsorption capacity, and good stability. 25,26 Whereas the PEC performance of g-C 3 N 4 is limited by its rapid charge recombination, narrow light absorption range, and poor dispersion in aqueous solutions.…”

“…Dopamine (DA) has the electron-rich structure of amino and phenolic hydroxyl groups . It is prone to form electron donor nanopolymers with conjugate structures via oxidative self-polymerization, usually serving as photoelectron transport channels, which indicates a good candidate of DA in the design of novel PEC materials. , …”