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33 results about "Cadmium tungstate" patented technology
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Cadmium tungstate (CdWO₄ or CWO), the cadmium salt of tungstic acid, is a dense, chemically inert solid which is used as a scintillation crystal to detect gamma rays. It has density of 7.9 g/cm³ and melting point of 1325 °C. It is toxic if inhaled or swallowed. Its crystals are transparent, colorless, with slight yellow tint. It is odorless. Its CAS number is 7790-85-4. It is not hygroscopic.
Cadmium sulfide quantum dot / bismuth tungstate / cadmium tungstate composite photocatalyst as well as preparation method and application thereof
PendingCN121588857AWater treatment compoundsWater/sewage treatment by irradiationHeterojunctionTungstate
The invention discloses a cadmium sulfide quantum dot / bismuth tungstate / cadmium tungstate composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The cadmium sulfide quantum dot / bismuth tungstate / cadmium tungstate (CdSQDs / Bi2WO6 / CdWO4) composite photocatalyst which has full-spectrum photocatalytic activity and is used for degrading organic pollutants is prepared by adopting a microwave-assisted synthesis technology, and the molar ratio of cadmium sulfide quantum dots to bismuth tungstate to cadmium tungstate is 2: (2-3): (8-12). According to the cadmium sulfide quantum dot / bismuth tungstate / cadmium tungstate composite photocatalyst as well as the preparation method and application thereof, due to the introduction of the cadmium sulfide quantum dots, the light absorption range of bismuth tungstate / cadmium tungstate is widened, and the light utilization rate is increased; the cadmium sulfide quantum dots, the bismuth tungstate and the cadmium tungstate form effective heterojunctions in close contact, so that the separation efficiency of photon-generated carriers is improved, and the photocatalytic performance is effectively improved.
Owner:QIQIHAR UNIVERSITY
Oxide crystals, methods for producing the same, scintillator materials using the same, and their applications.
PendingJP2026054629APolycrystalline material growthX-ray/infra-red processesHydrogen atomHazardous substance
The present invention provides an oxide crystal that does not contain harmful substances such as cadmium and has scintillation properties comparable to or better than those of cadmium tungstate (CdWO4), as well as a method for producing the same. [Solution] The oxide crystal according to one embodiment of the present invention is of general formula M x Hf y O 3-z (In the formula, x, y, and z each independently satisfy 0.5 ≤ x ≤ 1.5, 0.5 ≤ y ≤ 1.5, and -0.5 ≤ z ≤ 0.5, and M is selected from the group consisting of Be, Mg, Ca, Sr, and Ba.) It is characterized by being expressed as and containing a hydrogen atom (H).
Owner:NAT INST FOR MATERIALS SCI +1