An improved method for recovering metals from spent supported catalysts, including spent supported hydroprocessing catalysts. The method and associated processes comprising the method are useful to recover spent supported catalyst metals used in the petroleum and chemical processing industries. The method generally involves a combination of a pyrometallurgical and a hydrometallurgical method and includes forming a potassium carbonate calcine from the spent supported catalyst containing Group VIIIB/Group VIB/Group VB metal compound(s) combined with potassium carbonate, and extracting and recovering soluble Group VIB metal and soluble Group VB metal compounds from the potassium carbonate calcine.

Provided are a complex oxide ceramic having high antiviral activity, a functional material, and an article provided with the complex oxide ceramic and/or the functional material. The complex oxide ceramic according to one aspect of the present invention is a complex oxide ceramic containing cerium and molybdenum and having antiviral activity. The functional material according to one aspect of the present invention is also a functional material including the complex oxide ceramic mixed with a photocatalyst and/or an antibacterial effect. The article according to one aspect of the present invention is an article having the complex oxide ceramic and/or the functional material on at least a part of the surface thereof.

Provided are a complex oxide ceramic having high antiviral activity, a functional material, and an article provided with the complex oxide ceramic and/or the functional material. The complex oxide ceramic according to one aspect of the present invention is a complex oxide ceramic containing cerium and molybdenum and having antiviral activity. The functional material according to one aspect of the present invention is also a functional material including the complex oxide ceramic mixed with a photocatalyst and/or an antibacterial effect. The article according to one aspect of the present invention is an article having the complex oxide ceramic and/or the functional material on at least a part of the surface thereof.

Methods for purifying the molybdenum-99 isotope are disclosed. Molybdenum-99 is loaded onto an anion exchange column and extracted. In some embodiments, the extraction solution may include nitric acid and nitrate salts. In other embodiments, a two stage elution is performed in which a nitric acid containing eluent and a hydroxide containing eluent are used in succession to extract molybdenum-99.

A negative thermal expansion material having a negative thermal expansion coefficient according to the present invention is represented by Zr.sub.2-aM.sub.aS.sub.xP.sub.2O.sub.12+δ, where M is at least one selected from Ti, Ce, Sn, Mn, Hf, Ir, Pb, Pd, and Cr; a is 0≤a<2; x is 0.4≤x≤1; and δ is a value defined as to satisfy a charge neutral condition. The present invention makes it possible to provide a negative thermal expansion material, a composite material and a method for producing a negative thermal expansion material that can realize reduction in cost and density reduction.

A process for producing a metal-molybdate material is provided. The process includes a step of reacting a metal molybdenum (Mo) material in a liquid medium with a first acid to provide a Mo composition and combining the Mo composition with a metal source to provide a metal-Mo composition. The metal-Mo composition can be pH adjusted with a base to precipitate a plurality of metal-Mo particulates.

A process for producing a metal-molybdate material is provided. The process includes a step of reacting a metal molybdenum (Mo) material in a liquid medium with a first acid to provide a Mo composition and combining the Mo composition with a metal source to provide a metal-Mo composition. The metal-Mo composition can be pH adjusted with a base to precipitate a plurality of metal-Mo particulates.

The disclosure relates to solid oxide fuel cell (SOFC) anode materials that comprise various compositions of chromate based oxide materials. These materials offer high conductivity achievable at intermediate and low temperatures and can be used to prepare the anode layer of a SOFC. A method of making a low- or intermediate-temperature SOFC having an anode layer comprising a chromate based oxide material is also provided.

A device which can be exposed to chemical vapors, such as a molybdenum vapor, a tungsten vapor, or any combination thereof, which has a coating covering at least a portion thereof. The coating reduces or inhibits mass change at an outer surface of the device from exposure to the vapor. In certain situations, the mass change is a mass gain, and the coating reduces or inhibits the mass gain of equal to or less than 1×10.sup.−5 g mm.sup.−2.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides a method of making an active electrode material, the method comprising: providing a mixed niobium oxide; combining the mixed niobium oxide with a carbon precursor to form an intermediate material, wherein the carbon precursor comprises polyaromatic sp.sup.2 carbon and is selected from pitch carbons, graphene oxide, and mixtures thereof; and heating the intermediate material under reducing conditions to pyrolyse the carbon precursor forming a carbon coating on the mixed niobium oxide and introducing oxygen vacancies into the mixed niobium oxide, thereby forming the active electrode material.