Phosphorus nitride nano-dots as a versatile and metal-free support for efficient photoelectrochemical water oxidation

Abstract

Phosphorus nitride dots (PNDs) as a metal-free and versatile support over host of metal oxide-based photoelectrochemical (PEC) water oxidations are reported. PNDs have the ability to form various heterojunctions by...

Surface charge-directed borophene–phosphorous nitride nanodot heterojunction supports for enhanced photoelectrochemical performance

“…S1(a), ESI †). 24 The well-dispersed PNDs with an average particle size of 6 nm were confirmed from FETEM analysis (Fig. S2(a), ESI †).…”

“…The WO 3 photoanode results 2-fold (1.5 mA cm À2 ) and 2.4-fold (1.7 mA cm À2 ) enhanced current densities at 1.23 V vs. RHE with PNDs and BDs single modifications, respectively, which evidences the improved photogenerated carrier separation. 24 The hybrid dot-sensitized (i.e., PNDs and BDs) WO 3 photoanode exhibits a maximum current density of 2.8 mA cm À2 @ 1.23 V vs. RHE. A high 4-fold increment in the current density of WO 3 photoanodes due to PNDs and BDs sensitizations resulted in maximized charge separation and minimized charge recombination towards high PEC water oxidation performance.…”

“…The WO 3 photoanode results 2-fold (1.5 mA cm −2 ) and 2.4-fold (1.7 mA cm −2 ) enhanced current densities at 1.23 V vs. RHE with PNDs and BDs single modifications, respectively, which evidences the improved photogenerated carrier separation. 24 The hybrid dot-sensitized ( i.e. , PNDs and BDs) WO 3 photoanode exhibits a maximum current density of 2.8 mA cm −2 @ 1.23 V vs. RHE.…”

“…21 Similarly, phosphorus nitride (PN), another metal-free semiconductor having favourable band alignments and bandgap (B3.2 eV), has the potential to exhibit better performance. [22][23][24] Atomically thin 2D boron (B), also called ''borophene'', has been considered to be another promising 2D alternative for semiconductors such as batteries and supercapacitors. Borophene has fascinating physical and chemical properties, high carrier mobility, tunable bandgap, superconductivity and high chemical stability.…”

Phosphorous nitride dots induced efficient advanced oxidation with intrinsic chemiluminescence for organic pollutant degradation

“…5,6 However, phosphorus doping in these nanoparticles is usually limited to the surface with low concentrations, which restricts effective modification and enhancement of their performance. Although phosphorus nitride dots (PNDs), consisting of phosphorus-rich quantum dots, have been synthesized and reported for limited applications, such as photoelectron-catalysis and bioimaging, 7,8 2À system, as this information is crucial for understanding the mechanism of AOPs. 12-14 However, bulky equipment sizes and complicated pretreatments, coupled with the lack of online and real-time monitoring capabilities, highlight the need for inexpensive, simple, and direct sensing methodologies to monitor active intermediates in real time.…”