A titanium sulfide (TiS) nanomaterial and a composite material thereof for wave absorption are disclosed. The TiS nanomaterial is in a form of dispersed micro-particles which are bulks formed by stacking two-dimensional nano-sheets. The TiS nanomaterial is a bulk formed by stacking two-dimensional nano-sheets, thereby having a laminated structure that improves the wave absorption effect. In addition, experimental results demonstrate that the TiS nanomaterial with a dose of 40 wt% has the most excellent wave absorption performance, with a minimum reflection loss up to -47.4 dB, an effective absorption bandwidth of 5.9 GHz and an absorption peak frequency of 6.8 GHz, which are superior to those of existing two-dimensional bulk materials. One of reasons for the excellent wave absorption performance of the TiS nanomaterial may be because the laminated micro-morphology of TiS results in the electromagnetic wave refraction loss.

A compound represented by the general formula Li.sub.1+xAl.sub.xTi.sub.2x(PS.sub.4).sub.3, wherein 0.1x0.75. The above compound has been found to have high ionic conductivity. Also, the use of the compound as a solid electrolyte, in particular in an all solid-state lithium battery.

A titanium oxide compound according to the present invention comprises bronze-type titanium oxide or titanium oxide mainly composed of bronze-type titanium oxide, and contains calcium and/or silicon. The titanium oxide compound contains 0.005 to 2.5 mass % inclusive of calcium or 0.15 to 0.55 mass % inclusive of silicon, or contains 0.005 to 1.2 mass % inclusive of calcium and 0.15 to 0.2 mass % inclusive of silicon, or contains 0.005 to 0.1 mass % inclusive of calcium and 0.15 to 0.5 mass % inclusive of silicon.

A method of preparing a graphene-metal chalcogenide porous material is provided. The method includes providing a dispersion comprising graphene oxide; adding a metal precursor and a chalcogenide precursor to the dispersion to form a mixture; heating the mixture under hydrothermal conditions to form a gel; and freeze drying the gel to obtain the graphene-metal chalcogenide porous material. A graphene-metal chalcogenide porous material prepared by the method, and use of the material in water treatment, energy storage, fire proofing, batteries or supercapacitors are also provided.

A compound represented by the general formula Li.sub.1+xAl.sub.xTi.sub.2-x(PS.sub.4).sub.3, wherein 0.1x0.75. The above compound has been found to have high ionic conductivity. Also, the use of the compound as a solid electrolyte, in particular in an all solid-state lithium battery.

The present invention provides a method for producing a solution of nanosheets, comprising the step of contacting an intercalated layered material with a polar aprotic solvent to produce a solution of nanosheets, wherein the intercalated layered material is prepared from a layered material selected from the group consisting of a transition metal dichalcogenide, a transition metal monochalcogenide, a transition metal trichalcogenide, a transition metal oxide, a metal halide, an oxychalcogenide, an oxypnictide, an oxyhalide of a transition metal, a trioxide, a perovskite, a niobate, a ruthenate, a layered III-VI semiconductor, black phosphorous and a V-VI layered compound. The invention also provides a solution of nanosheets and a plated material formed from nanosheets.

The sulfide of the present invention comprises an amorphous (lithium) niobium sulfide having an average composition represented by formula (1): Li.sub.k1NbS.sub.n1 (wherein 0k15; 3n110; and when n13.5, k10.5), or an amorphous (lithium) titanium niobium sulfide having an average composition represented by formula (2): Li.sub.k2Ti.sub.1-m2Nb.sub.m2S.sub.n2 (wherein 0k25; 0<m2<1; 2n210; and when n23.5, k21.5). The sulfide of the present invention is a material that is useful as a cathode active material for lithium batteries, such as lithium primary batteries, lithium secondary batteries, and lithium ion secondary batteries, and has a high charge-discharge capacity, high electrical conductivity, and excellent charge-discharge performance.

A titanium sulfide (TiS) nanomaterial and a composite material thereof for wave absorption are disclosed. The TiS nanomaterial is in a form of dispersed micro-particles which are bulks formed by stacking two-dimensional nano-sheets. The TiS nanomaterial is a bulk formed by stacking two-dimensional nano-sheets, thereby having a laminated structure that improves the wave absorption effect. In addition, experimental results demonstrate that the TiS nanomaterial with a dose of 40 wt % has the most excellent wave absorption performance, with a minimum reflection loss up to ?47.4 dB, an effective absorption bandwidth of 5.9 GHz and an absorption peak frequency of 6.8 GHz, which are superior to those of existing two-dimensional bulk materials. One of reasons for the excellent wave absorption performance of the TiS nanomaterial may be because the laminated micro-morphology of TiS results in the electromagnetic wave refraction loss.

The present disclosure provides a modified titanium disulfide nanomaterial and its preparation method and application, including the following steps: 1) mixing 1 part by weight of a hydrophilic titanium disulfide nanosheet with 50-200 parts by weight of a ketone compound to obtain a mixture; 2) adding 1-15 parts by weight of an alkylamine compound to the mixture, controlling a pH of the mixture to 4-7, cooling to room temperature after modification reaction, and washing with ethanol, to obtain the modified titanium disulfide nanomaterial; where the number of carbon atoms in the alkylamine compound is C6-C18. The modified titanium disulfide nanomaterial provided by the present disclosure can significantly improve the oil recovery.

A titanium oxide compound according to the present invention comprises bronze-type titanium oxide or titanium oxide mainly composed of bronze-type titanium oxide, and contains calcium and/or silicon. The titanium oxide compound contains 0.005 to 2.5 mass % inclusive of calcium or 0.15 to 0.55 mass % inclusive of silicon, or contains 0.005 to 1.2 mass % inclusive of calcium and 0.15 to 0.2 mass % inclusive of silicon, or contains 0.005 to 0.1 mass % inclusive of calcium and 0.15 to 0.5 mass % inclusive of silicon.