[Technical Problem] To provide a chlorine gas decomposition catalyst that can remove chlorine gas contained in, for example, exhaust gas, with high efficiency, and is less likely to reduce catalyst components when used.

[Solution to Problem] A chlorine gas decomposition catalyst, including a composite oxide (X) of Al and at least one element M1 selected from the group consisting of Ce and Co.

There is disclosed a method of constructing a layered double hydroxide (LDH) material comprising selected metal ions, and employing metallic vanadium carbide (V.sub.2C) for promoting conductive properties of the LDH material, wherein the layered LDH material is a trimetallic LDH material. The trimetallic LDH material comprises selected Ni.sup.2+, Co.sup.2+, and AL.sup.3+ metal ions with its cationic configuration for improving photocatalytic properties of the LDH material, wherein trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C)-based composite is coupled with a graphitic carbon nitride (g-C.sub.3N.sub.4) nanosheet, to form a hybrid-junction photocatalyst. Also disclosed is a layered structure of vanadium carbide (V.sub.2C) MXenes, comprising trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C) coupled with graphitic carbon nitride (g-C.sub.3N.sub.4), forming a Ni.sub.xCo.sub.yAl.sub.z LDH/g-C.sub.3N.sub.4 hybrid-junction photocatalyst.

There is disclosed a method of constructing a layered double hydroxide (LDH) material comprising selected metal ions, and employing metallic vanadium carbide (V.sub.2C) for promoting conductive properties of the LDH material, wherein the layered LDH material is a trimetallic LDH material. The trimetallic LDH material comprises selected Ni.sup.2+, Co.sup.2+, and AL.sup.3+ metal ions with its cationic configuration for improving photocatalytic properties of the LDH material, wherein trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C)-based composite is coupled with a graphitic carbon nitride (g-C.sub.3N.sub.4) nanosheet, to form a hybrid-junction photocatalyst. Also disclosed is a layered structure of vanadium carbide (V.sub.2C) MXenes, comprising trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C) coupled with graphitic carbon nitride (g-C.sub.3N.sub.4), forming a Ni.sub.xCo.sub.yAl.sub.z LDH/g-C.sub.3N.sub.4 hybrid-junction photocatalyst.

There is disclosed a method of constructing a layered double hydroxide (LDH) material comprising selected metal ions, and employing metallic vanadium carbide (V.sub.2C) for promoting conductive properties of the LDH material, wherein the layered LDH material is a trimetallic LDH material. The trimetallic LDH material comprises selected Ni.sup.2+, Co.sup.2+, and Al.sup.3+ metal ions with its cationic configuration for improving photocatalytic properties of the LDH material, wherein trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C)-based composite is coupled with a graphitic carbon nitride (g-C.sub.3N.sub.4) nanosheet, to form a hybrid-junction photocatalyst. Also disclosed is a layered structure of vanadium carbide (V.sub.2C) MXenes, comprising trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C) coupled with graphitic carbon nitride (g-C.sub.3N.sub.4), forming a Ni.sub.xCo.sub.yAl.sub.z LDH/g-C.sub.3N.sub.4 hybrid-junction photocatalyst.

There is disclosed a method of constructing a layered double hydroxide (LDH) material comprising selected metal ions, and employing metallic vanadium carbide (V.sub.2C) for promoting conductive properties of the LDH material, wherein the layered LDH material is a trimetallic LDH material. The trimetallic LDH material comprises selected Ni.sup.2+, Co.sup.2+, and Al.sup.3+ metal ions with its cationic configuration for improving photocatalytic properties of the LDH material, wherein trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C)-based composite is coupled with a graphitic carbon nitride (g-C.sub.3N.sub.4) nanosheet, to form a hybrid-junction photocatalyst. Also disclosed is a layered structure of vanadium carbide (V.sub.2C) MXenes, comprising trimetallic nickel-cobalt-aluminium layered double hydroxide (Ni.sub.xCo.sub.yAl.sub.z LDH) and vanadium carbide MXene (V.sub.2C) coupled with graphitic carbon nitride (g-C.sub.3N.sub.4), forming a Ni.sub.xCo.sub.yAl.sub.z LDH/g-C.sub.3N.sub.4 hybrid-junction photocatalyst.

A photocatalytic structure according to one embodiment of the present invention, which achieves a high deodorization effect, comprises a base material formed of a porous ceramic material in a platelike shape and a photocatalyst supported on the surface and inside pores of the base material. The open porosity of the ceramic material is 35-75%, the ceramic material includes large pores having a diameter of 100-1000 m inclusive, and small pores having a diameter of 10 m or less are open in the inner wall surfaces of the large pores.

A photocatalytic structure according to one embodiment of the present invention, which achieves a high deodorization effect, comprises a base material formed of a porous ceramic material in a platelike shape and a photocatalyst supported on the surface and inside pores of the base material. The open porosity of the ceramic material is 35-75%, the ceramic material includes large pores having a diameter of 100-1000 m inclusive, and small pores having a diameter of 10 m or less are open in the inner wall surfaces of the large pores.

The present invention relates to the field of renewable energy and photocatalysis (e.g. photocatalytic water splitting for hydrogen production), specifically focusing on sulfurized perovskite compounds, perovskite nanosheets, and synthesis method and uses thereof. The present invention relates to perovskite nanosheets comprising LaXO.sub.nS.sub.3-n, wherein X is a metal selected from Fe, Co, Mn, Cu, Zn, or Ni; and wherein 0<n<3. Further, the present invention explores the perovskite nanosheets to improve efficiency, stability, and light absorption in solar-driven hydrogen generation applications. The present perovskite nanosheet enhances visible light absorption, charge carrier mobility, and catalytic activity, making it useful for large-scale hydrogen production.

The present invention relates to the field of renewable energy and photocatalysis (e.g. photocatalytic water splitting for hydrogen production), specifically focusing on sulfurized perovskite compounds, perovskite nanosheets, and synthesis method and uses thereof. The present invention relates to perovskite nanosheets comprising LaXO.sub.nS.sub.3-n, wherein X is a metal selected from Fe, Co, Mn, Cu, Zn, or Ni; and wherein 0<n<3. Further, the present invention explores the perovskite nanosheets to improve efficiency, stability, and light absorption in solar-driven hydrogen generation applications. The present perovskite nanosheet enhances visible light absorption, charge carrier mobility, and catalytic activity, making it useful for large-scale hydrogen production.

A heating tube for supporting the combustion of a fuel and an oxidant includes a tubular wall for containing a gas flow through the heating tube and a catalyst, contained by the tubular wall, for catalysing a combustion reaction of a gaseous fuel and a gaseous oxidant.