40results about How to "Excellent photocatalytic water splitting hydrogen production performance" patented technology

A photocatalyst Pt-carried CdS / Ti-MCM-41 for generating H2 by optical catalytic reaction is prepared through providing CTAB as template agent, hydrothermal reaction to synthesize CTAB / Ti-MCM-41, ion exchange to obtain Cd / Ti-MCM-41, sulfurizing in HS gas to obtain CdS / Ti-MCM-41 and carrying Pt by optical reduction method. It has high H2 output rate.

The invention relates to a TiO2 photocatalyst and in particular relates to a CdS-MoS2 nanoparticle co-doped black porous TiO2 photocatalyst and a preparation method thereof and a performance study by producing hydrogen by water photolysis, and belongs to the field of semiconductor materials. The catalyst is prepared by the steps: firstly, synthesizing porous MoO3-CdO-TiO2; hydrogenating the porous MoO3-CdO-TiO2 under the supporting action of ethidene diamine to obtain black MoO3-CdO-TiO2; and then performing in-situ vulcanization in a solvothermal condition to obtain black MoS2-CdS-TiO2. As CdS can absorb visible light, MoS2 can effectively transfer photon-generated carriers and black TiO2 can effectively enhance the photon-to-electron conversion efficiency, the catalyst shows an excellent performance of producing hydrogen by photo-catalytic decomposition of water. The speed of producing hydrogen by water photolysis reaches 4527 umol.h<-1>g<-1>. Therefore, a novel path for preparing a novel photocatalyst under visible lights can be provided.

The preparation and photocatalytic application of a polyacid-based cobalt-metal organic hybrid material, the invention relates to a polyacid-based cobalt-metal organic hybrid material. The purpose of the present invention is to solve the problem that the photocatalytic hydrogen production material synthesized in the prior art has a wide band gap, the photogenerated electron holes are easy to recombine, and the surface reaction of proton reduction is difficult, etc., resulting in that the existing photocatalytic hydrogen production material does not produce problems such as hydrogen or low hydrogen production. This patent designs and develops a kind of polyacid-based cobalt metal-organic hybrid material whose chemical formula is (H 2 SiW 12 o 40 )[Co(pzta) 3 ] 2 4H 2 O. Synthesis method: Dissolve silicotungstic acid, cobalt chloride, and organic ligand 5‑(2‑pyrazinyl)‑1,2,4‑triazole in deionized water, adjust the pH to 2.0, and keep the temperature at 160°C Response 3 days. The invention can obtain a polyacid-based cobalt metal-organic hybrid material.

The invention discloses a method for preparing a defect-enhanced tungsten-doped carbon nitride photocatalyst, which belongs to the technical field of photocatalytic materials. The method comprises the following steps: mixing melamine and ammonium metatungstate in liquid phase, rotary evaporating and drying to remove deionized water; calcining the dried product in a muffle furnace, and naturally cooling to room temperature to obtain a tungsten-doped carbon nitride material; The obtained product is calcined at 520° C. for 30-90 min under hydrogen gas, more defects are introduced into the tungsten-doped carbon nitride photocatalyst, and a defect-enhanced tungsten-doped carbon nitride photocatalyst is obtained. A defect-enhanced tungsten-doped carbon nitride photocatalyst provided by the invention has good photocatalytic hydrogen production from water; the defect-enhanced carbon nitride prepared by the method of the invention has high carrier separation efficiency, which is beneficial to The photocatalytic activity is improved.