A5018795084- Advanced Photocatalysis Techniques
- Iron oxide chemistry and applications
- Copper-based nanomaterials and applications
- Multiferroics and related materials
- Advanced oxidation water treatment
- Catalytic Processes in Materials Science
- Arsenic contamination and mitigation
- Ga2O3 and related materials
- CO2 Reduction Techniques and Catalysts
- ZnO doping and properties
- Electronic and Structural Properties of Oxides
- Advanced Materials and Mechanics
- Advanced Chemical Physics Studies
- Photonic Crystals and Applications
- Corrosion Behavior and Inhibition
- Mine drainage and remediation techniques
- Ammonia Synthesis and Nitrogen Reduction
- TiO2 Photocatalysis and Solar Cells
- Acoustic Wave Resonator Technologies
Collaborative Innovation Center of Advanced Microstructures
2015-2023
Nanjing University
2012-2023
Nanjing Tech University
2022
National Laboratory of Solid State Microstructures
2017
A facile spray pyrolysis method was used to prepare high-performance Ti-doped ZnFe<sub>2</sub>O<sub>4</sub> for boosting photoelectrochemical water splitting.
Durability is one prerequisite for material application. Photoelectrochemical decomposition of seawater a promising approach to produce clean hydrogen by using solar energy, but it always faces the problem serious Cl- corrosion. We find that main deactivation mechanism photoanode oxide surface reconstruction accompanied coordination during splitting, and stability can be effectively improved enhancing metal-oxygen interaction. Taking metastable β-Fe2O3 as an example, Sn added lattice enhance...
Although β-Fe
Abstract Turing structures typically emerge in reaction-diffusion processes far from thermodynamic equilibrium, involving at least two chemicals with different diffusion coefficients (inhibitors and activators) the classic systems. Constructing a structure homogeneous solutions is large challenge because of similar most small molecule weight species. In this work, we show that near zero strain semi-coherence interfaces constructed subject to kinetics. Experimental results combined molecular...
To further improve the photocatalytic H2 evolution activity, NaNbO3 photocatalyts simultaneously possessing cubic crystal structure and 1D morphology have been successfully synthesized via a modified solvothermal strategy. During process of synthesis employing ethylene glycol as solvent, temperature fluctuation during autoclaving period is proposed to regulate grain growth without any other additives or calcinations. It demonstrated that structure-directing effect solvent enhanced in...
Since Fe<sub>2</sub>O<sub>3</sub> is a promising photoanode material for water splitting, it has attracted much attention, while other phases of ferric oxide are ignored. Here, β-Fe<sub>2</sub>O<sub>3</sub> was used as solar and photocurrent <italic>ca.</italic> 0.12 mA cm<sup>2</sup> at 1.6 V<sub>RHE</sub> observed.
The behavior of photoelectrochemical (PEC) water splitting under temperature is fundamentally important yet less investigated, because the lack a suitable analysis method to decouple and quantify contributions each elemental step (charge carrier generation transport, photovoltage generation, surface catalysis) overall PEC efficiency. Herein, by using hematite as prototype electrode, its performance dependence on well resolved, efficiency loss/gain during also quantitatively analyzed....
A novel hexagonal YFeO<sub>3</sub> photoanode with wide-spectrum response, exhibiting high theoretical solar-to-hydrogen efficiency (approximately 20%).
Charge transport in a photoelectrode largely influences its solar-to-chemical energy conversion efficiency. Especially, particle-assembled photoanode films are always subject to poor interparticle electron transport. The channel between the particles is usually constructed by using necking process, order overcome In this study, Sb-doped SnO2, as transparent and degenerate semiconductor, has been found act novel material for constructing channels films. As result, it greatly improves...
The effects of halogen (F, Cl, Br, I, and At) doping in the direct-band-gap β-Fe 2 O 3 semiconductor on its band structures electron–hole recombination have been investigated by density functional theory.
Metastable iron oxide (β-Fe2O3) has attracted wide attention in photoelectrochemical water splitting as a result of its ideal light absorption capacity and theoretical saturation photocurrent. However, the poor crystallinity high concentration defects β-Fe2O3 prepared by traditional method resulted onset potential splitting. This work proved that γ-Fe2O3 can be converted into under heating, which exploits new synthetic route for β-Fe2O3. obtained this phase transformation smaller particle...
Many metal-oxide candidates for photoelectrochemical water splitting exhibit localized small polaron carrier conduction. Especially hematite (α-Fe2O3) photoanodes often suffer from low mobility, which causes the serious bulk electron-hole recombination and greatly limits their PEC performances. In this study, charge separation efficiency of was enhanced by coating an ultrathin p-type LaFeO3 overlayer. Compared to photoanodes, solar photocurrent Fe2O3/LaFeO3 n–p junction exhibits a 90%...
Metastable β-Fe2O3 is a promising photocatalyst with band gap of approximately 1.9 eV, while its intrinsic material properties remain rarely studied by theoretical calculations. Here, using density functional theory, we the electronic structure and effective mass carriers in Zr, Sn, Ti doped β-Fe2O3. The calculation results show that, through doping or Ti, dipole moment FeO6 octahedra increases, which favors separation photo-excited electron-hole pairs. electron hole masses close-packed...
Abstract Durability is one prerequisite for material application. Photoelectrochemical (PEC) decomposition of seawater a promising approach to produce clean hydrogen by using solar energy, but it always suffers from serious Cl− corrosion. We found that the main deactivation mechanism photoanodes oxide surface reconstruction accompanied coordination during splitting, and stability can be greatly improved enhancing metal-oxygen interaction. Taking metastable β-Fe2O3 photoanode as an example,...
Abstract The Sabatier reaction coupled with water electrolysis constitutes the state-of-the-art oxygen recovery technology in International Space Station missions, but efficiency of this system is only 49% (theoretical maximum 50%). Technologies that could realize >75% are urgently needed for long duration manned missions. Herein, we found a mild photochemical process can convert CO2 into carbon nanotubes (CNTs) over Co-based catalyst, thus permitting 100% theoretical recovery. This has...