The invention discloses a functionalized hybrid nanotube C@MoS.sub.2/SnS.sub.2 and preparation method and application thereof. Dissolving ammonium molybdate tetrahydrate in water under ultrasound, adding ethylenediamine with stirring, and then adding dilute hydrochloric acid dropwise to react to obtain MoO.sub.3-EDA nanowires; adding L-cysteine and glucose into water containing MoO.sub.3-EDA nanowires, and obtaining a dispersion by ultrasonication; heating the dispersion and then centrifuging, then drying the solid matter and then calcining to obtain C@MoS.sub.2 nanotubes; adding C@MoS.sub.2 nanotubes into water containing SnCl.sub.4.5H.sub.2O and KSCN, and hydrothermally reacting to obtain functionalized hybrid nanotubes C@MoS.sub.2/SnS.sub.2. The invention realizes photocatalytic reduction of heavy metal ions to achieve treatment of heavy metal ion solution.

The invention discloses a functionalized hybrid nanotube C@MoS.sub.2/SnS.sub.2 and preparation method and application thereof. Dissolving ammonium molybdate tetrahydrate in water under ultrasound, adding ethylenediamine with stirring, and then adding dilute hydrochloric acid dropwise to react to obtain MoO.sub.3-EDA nanowires; adding L-cysteine and glucose into water containing MoO.sub.3-EDA nanowires, and obtaining a dispersion by ultrasonication; heating the dispersion and then centrifuging, then drying the solid matter and then calcining to obtain C@MoS.sub.2 nanotubes; adding C@MoS.sub.2 nanotubes into water containing SnCl.sub.4.5H.sub.2O and KSCN, and hydrothermally reacting to obtain functionalized hybrid nanotubes C@MoS.sub.2/SnS.sub.2. The invention realizes photocatalytic reduction of heavy metal ions to achieve treatment of heavy metal ion solution.

The present invention relates to a process for hydroconversion of a heavy hydrocarbon feedstock in the presence of hydrogen, at least one supported solid catalyst and at least one dispersed solid catalyst obtained from at least one salt of a heteropolyanion combining molybdenum and at least one metal selected from cobalt and nickel in a Strandberg, Keggin, lacunary Keggin or substituted lacunary Keggin structure.

Disclosed are a catalyst and a preparation method therefor, the catalyst being able to maintain a high production yield of C8 aromatic hydrocarbons in the process of converting a feedstock containing alkyl aromatics to C8 aromatic hydrocarbons such as mixed xylene through disproportionation/transalkylation/dealkylation while reducing a content of ethylbenzene in the products.

Methods and systems for mixing a catalyst precursor with a heavy oil feedstock preparatory to hydroprocessing the heavy oil feedstock in a reactor to form an upgraded feedstock. Achieving very good dispersion of the catalyst precursor facilitates and maximizes the advantages of the colloidal or molecular hydroprocessing catalyst. A catalyst precursor and a heavy oil feedstock having a viscosity greater than the viscosity of the catalyst precursor are provided. The catalyst precursor is pre-mixed with a hydrocarbon oil diluent, forming a diluted catalyst precursor. The diluted precursor is then mixed with at least a portion of the heavy oil feedstock so as to form a catalyst precursor-heavy oil feedstock mixture. Finally, the catalyst precursor-heavy oil feedstock mixture is mixed with any remainder of the heavy oil feedstock, resulting in the catalyst precursor being homogeneously dispersed on a colloidal and/or molecular level within the heavy oil feedstock.

Methods and systems for mixing a catalyst precursor with a heavy oil feedstock preparatory to hydroprocessing the heavy oil feedstock in a reactor to form an upgraded feedstock. Achieving very good dispersion of the catalyst precursor facilitates and maximizes the advantages of the colloidal or molecular hydroprocessing catalyst. A catalyst precursor and a heavy oil feedstock having a viscosity greater than the viscosity of the catalyst precursor are provided. The catalyst precursor is pre-mixed with a hydrocarbon oil diluent, forming a diluted catalyst precursor. The diluted precursor is then mixed with at least a portion of the heavy oil feedstock so as to form a catalyst precursor-heavy oil feedstock mixture. Finally, the catalyst precursor-heavy oil feedstock mixture is mixed with any remainder of the heavy oil feedstock, resulting in the catalyst precursor being homogeneously dispersed on a colloidal and/or molecular level within the heavy oil feedstock.

Higher mixed alcohols are produced from syngas contacting a catalyst in a reactor. The catalyst has a first component of molybdenum or tungsten, a second component of vanadium, a third component of iron, cobalt, nickel or palladium and optionally a fourth component of a promoter. The first component forms alcohols, while the vanadium and the third component stimulates carbon chain growth to produce higher alcohols.

The invention discloses a method for preparing a Fe-doped MoS.sub.2 nano-material, which comprises the following steps: dissolving a ferric salt and ammonium tetrathiomolybdate in DMF and reacting at 180-200 C. for 6-24 hrs to obtain a Fe-doped MoS.sub.2 nano-material. The present invention also provides a Fe-doped MoS.sub.2 nano-material supported by nickel foam, which includes a nickel foam substrate and the Fe-doped MoS.sub.2 nano-material loaded on the nickel foam substrate. Furthermore, the present invention also provides a preparation method and use of the above materials. In the invention, the desired product can be obtained by a one-pot solvothermal reaction, and thus the operation is simple. There is no need to introduce a surfactant for morphological control during the preparation process, and the resulting product has a clean surface and is easy to wash.

Provided is a molybdenum sulfide that is ribbon-shaped and particularly suitable for a hydrogen generation catalyst. Disclosed are a ribbon-shaped molybdenum sulfide, in which 50 particles as measured by observation with a scanning electron microscope (SEM) have a shape of, on average, 500 to 10000 nm in length, 10 to 1000 nm in width, and 3 to 200 nm in thickness; a method for producing the ribbon-shaped molybdenum sulfide, including: (1) heating a molybdenum oxide at a temperature of 200 to 1000 C. in the presence of a sulfur source; or (2) heating a molybdenum oxide at a temperature of 100 to 800 C. in the absence of a sulfur source, and then heating the molybdenum oxide at a temperature of 200 to 1000 C. in the presence of a sulfur source; and a hydrogen generation catalyst including the ribbon-shaped molybdenum sulfide.

Provided is a molybdenum sulfide that is ribbon-shaped and particularly suitable for a hydrogen generation catalyst. Disclosed are a ribbon-shaped molybdenum sulfide, in which 50 particles as measured by observation with a scanning electron microscope (SEM) have a shape of, on average, 500 to 10000 nm in length, 10 to 1000 nm in width, and 3 to 200 nm in thickness; a method for producing the ribbon-shaped molybdenum sulfide, including: (1) heating a molybdenum oxide at a temperature of 200 to 1000 C. in the presence of a sulfur source; or (2) heating a molybdenum oxide at a temperature of 100 to 800 C. in the absence of a sulfur source, and then heating the molybdenum oxide at a temperature of 200 to 1000 C. in the presence of a sulfur source; and a hydrogen generation catalyst including the ribbon-shaped molybdenum sulfide.