CN109794242B - Method for preparing monodisperse Pt nano particles on oxide substrate - Google Patents
Method for preparing monodisperse Pt nano particles on oxide substrate Download PDFInfo
- Publication number
- CN109794242B CN109794242B CN201910069384.5A CN201910069384A CN109794242B CN 109794242 B CN109794242 B CN 109794242B CN 201910069384 A CN201910069384 A CN 201910069384A CN 109794242 B CN109794242 B CN 109794242B
- Authority
- CN
- China
- Prior art keywords
- nanoparticles
- oxide
- monodisperse
- temperature
- precursor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
A method for preparing monodisperse Pt nanoparticles on oxide substrate includes such steps as preparing precursor of oxide by molten salt method, dispersing it in aqueous solution of Pt, radiating by ultraviolet light to form Pt nanoparticles with small size and uniform distribution on the surface of precursor, calcining at high temp to regulate the valence state of Pt nanoparticles, and cooling to obtain monodisperse Pt nanoparticles with different oxidizing states.
Description
Technical Field
The invention relates to the technical field of nano-electronics and catalysis, in particular to a method for preparing monodisperse Pt nano-particles on an oxide substrate.
Background
The metal nano-particles have unique physical and chemical properties and have wide application prospects in the fields of catalysis, optoelectronic devices, magnetic materials, coating materials and the like, so that the preparation of the metal nano-particles is widely researched. However, since the size of the metal nanoparticles has a large influence on the physicochemical properties thereof, generally, the size of the metal nanoparticles can be reduced to optimize the physicochemical properties thereof and save the cost. Most of the reported methods for preparing monodisperse metal nanoparticles require the addition of a chemical reducing agent or high temperature conditions, but so far, reports on the preparation of monodisperse metal nanoparticles by a photochemical method at room temperature have been rare.
In addition, the oxidation state of the metal nanoparticles also has a great influence on the physicochemical properties thereof, and most of the reported researches on the metal nanoparticles have focused on the research on the physicochemical properties of the zero-valent metal nanoparticles, while few researches on the influence of the oxidation state of the metal nanoparticles on the physicochemical properties thereof have been conducted.
Photochemical methods have some advantages in the preparation of metal nanoparticles, such as: the reaction can be carried out under mild conditions at room temperature; can be realized only by illumination, and is green and environment-friendly. However, the current process of preparing metal nanoparticles by photochemical method generally uses a chemical reducing agent or high temperature conditions to achieve the reduction of metal salt, such as: can be prepared by reducing AuCl with sodium borohydride3·HCl·4H2Preparation of gold nanoparticles by aqueous O solution, reduction of PtCl by thermal high pressure Process4·2HCl·4H2O to prepare platinum nanoparticles. In addition, it is generally easier to prepare metal nanoparticles on oxide substrates having a large specific surface area, but there are few reports on the preparation of monodisperse metal nanoparticles on oxide substrates having a small specific surface area.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method for preparing monodisperse Pt nanoparticles on an oxide substrate, which can realize uniform growth of the Pt nanoparticles on the surface of an oxide with a small specific surface area at room temperature through illumination and has the characteristics of simple process and no pollution.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for preparing monodisperse Pt nanoparticles on an oxide substrate comprises the following steps:
step 1: preparing an oxide precursor by a molten salt method and a high-temperature solid phase method;
step 2: adding an oxide precursor into a Pt aqueous solution to obtain an oxide-containing precursor solution;
and step 3: irradiating the oxide-containing precursor solution obtained in the step 2 by using ultraviolet light, and stirring the solution by using a magnetic stirrer;
and 4, step 4: after the photochemical reaction is finished, filtering, washing and drying, obtaining monodisperse Pt nano particles on the surface of the precursor;
and 5: and (4) respectively calcining the monodisperse Pt nanoparticles obtained in the step (4) for 3h at the temperature of 300 ℃, 400 ℃ and 500 ℃, and cooling to obtain the monodisperse Pt nanoparticles in different oxidation states.
The oxidation precursor is SrBi2Ta2O9。
The source of Pt in the step 2 is platinum chloride, platinum sheet and chloroplatinic acid.
The wavelength of the ultraviolet light in the step 3 is 365nm, and the irradiation intensity is 20mW/cm2。
The rotating speed of the stirrer in the step 3 is 500 revolutions per minute, and the stirring reaction time is 4 hours.
The temperature of the oxide-containing precursor solution during photochemical reaction is 25 ℃.
The drying temperature of the step 4 is 60 ℃, and the drying time is 10 hours.
The heating rate during the calcination is 2.2 ℃/min.
The mass concentration of the Pt water solution in the step 1 is 0.025g/L, and the mass concentration of the added oxide precursor is 1.25 g/L.
The ratio of three Pt valence states is Pt when the calcination temperature is 300 DEG C0:Pt2+:Pt4+49 percent, 16 percent and 33 percent; the ratio of three Pt valence states is Pt when the calcining temperature is 400 DEG C0:Pt2+:Pt 4+40%: 35%: 28%, and the ratio of three Pt valence states is Pt when the calcining temperature is 500 deg.C0:Pt2+:Pt4+＝21％:49％:30％。
Compared with the prior art, the invention has the beneficial effects that:
the oxidized precursor SrBi of the invention2Ta2O9Is a ferroelectric material with excellent ferroelectricity, and the oxide precursor SrBi is used under the condition of illumination2Ta2O9Can spontaneously generate ferroelectric polarization effect which is beneficial to metal atoms in the SrBi precursor of the oxide2Ta2O9Dispersion of the surface. Therefore, ultraviolet light irradiates on the oxide precursor SrBi2Ta2O9The ferroelectric polarization effect induced by the surface is beneficial to the dispersion of Pt atoms, so that the specific surface area is smaller (the oxide precursor SrBi synthesized by the invention)2Ta2O9Has a specific surface area of 4.9m2Oxide precursor SrBi of/g)2Ta2O9The surface preparation of Pt nano particles is realized. The invention can ensure that part of Pt in the Pt nano particles can be obtained by calcining the monodisperse Pt nano particles under the high-temperature condition0Conversion to Pt2+，Pt0With Pt2+Can generate synergistic effect in the catalytic reaction, and is beneficial to the catalytic reaction.
The invention can realize the uniform growth of Pt nanoparticles on the surface of an oxide with smaller specific surface area by illumination at room temperature, and the generated monodisperse Pt nanoparticles are calcined at different temperatures to obtain Pt nanoparticles with different oxidation states, and the invention has the characteristics of simple process and no pollution. The Pt nano particles prepared by the method have the characteristics of small particle size, single and uniform dispersion, adjustable oxidation state, attachment on an oxide precursor and application in the fields of nano electronics and catalysis.
Drawings
FIG. 1 shows the preparation of SrBi by a molten salt method after photochemical reaction2Ta2O9Transmission electron micrograph (c).
FIG. 2 shows the preparation of SrBi by a molten salt method after photochemical reaction2Ta2O9Transmission electron micrograph of Pt nanoparticles above.
FIG. 3 shows the preparation of SrBi by a molten salt method after photochemical reaction2Ta2O9Size statistics of Pt nanoparticles above.
Fig. 4 is an X-ray photoelectron spectrum of Pt in monodisperse Pt nanoparticles.
FIG. 5 is an X-ray photoelectron spectrum of Pt after calcination of monodisperse Pt nanoparticles at 300 deg.C.
FIG. 6 is an X-ray photoelectron spectrum of Pt after calcination of monodisperse Pt nanoparticles at 400 deg.C.
FIG. 7 is an X-ray photoelectron spectrum of Pt after calcination of monodisperse Pt nanoparticles at 500 deg.C.
FIG. 8 shows Pt after calcination of monodisperse Pt nanoparticles at 300 deg.C, 400 deg.C, and 500 deg.C0、Pt2+And Pt4+Is shown in the graph of the change process of the relative content of (A).
Detailed Description
The present invention will be described in further detail with reference to examples.
This example provides a SrBi prepared in a molten salt process2Ta2O9The method for preparing the monodisperse Pt nano particles with different oxidation states on the precursor is to realize the Pt of the Pt aqueous solution by a photochemical method4+A method for preparing monodisperse Pt metal nanoparticles by reduction and regulating and controlling the oxidation state of the Pt nanoparticles by a high-temperature calcination method. The method comprises the following specific steps:
preparation of SrBi by molten salt method2Ta2O9The sample process: 1.3104g of Ta were weighed out separately2O5，0.6275g Sr(NO3)2And 1.3823g Bi2O31.3185g of NaCl and 1.6813g of KCl are ground in an agate mortar for about 0.5h to be uniformly mixed, then the ground powder is put into a crucible, the crucible is used for burning in air at 850 ℃ for 3h and cooled to room temperature along with the furnace, the NaCl and the KCl are dissolved by deionized water, and then the NaCl and the KCl are filtered, washed and removed, and the AgNO is used for removing the NaCl and the KCl3The washed solution was checked until no precipitate was formed and finally dried in an oven at 60 ℃ for 10 hours. Obtaining SrBi2Ta2O9Powder for further use. Transmission electron microscopy analysis (see FIG. 1) shows that SrBi2Ta2O9The surface structure of (2) is a two-dimensional plane structure.
Photochemical reduction of Pt4+Preparing monodisperse Pt nanoparticles: weigh 0.5g SrBi2Ta2O9Powder addition to Pt massAdding into 0.025g/L water solution, stirring with magnetic stirrer at 500 rpm, and irradiating with ultraviolet light source with wavelength of 365nm at intensity of 20mW/cm2The temperature during the photochemical reaction was 25 ℃, and after stirring and reacting for 4 hours, the reaction mixture was filtered, washed, and dried in an oven at 60 ℃ for 10 hours. Obtaining 1.5% -Pt/SrBi2Ta2O9And (3) powder. Transmission electron microscopy analysis (as shown in FIG. 2) indicates that the particle size of the nano metal Pt is about 2 nanometers (nm) (as shown in FIG. 3), and X-ray photoelectron spectroscopy analysis (as shown in FIG. 4) indicates that the generated monodisperse Pt nanoparticles are made of Pt0And Pt4+Composition, the ratio of two Pt valence states is Pt0:Pt4+＝68％:32％。
High-temperature calcination is used for regulating and controlling the oxidation state of the monodisperse Pt nanoparticles: weigh 0.5g of 1.5% -Pt/SrBi2Ta2O9Powder; put into a crucible. Will contain 0.5g of 1.5% -Pt/SrBi2Ta2O9Calcining the powder in a crucible at 300 ℃ to obtain 1.5% -Pt/SrBi2Ta2O9300 powder, X photoelectron spectroscopy (FIG. 5) showed 1.5% -Pt/SrBi2Ta2O9-300 powder with a portion of Pt0Is converted into Pt2+The ratio of the three Pt valence states is Pt0:Pt2+:Pt4+49%, 16% and 33%. Will contain 0.5g of 1.5% -Pt/SrBi2Ta2O9Calcining the powder in a crucible at 400 ℃ to obtain 1.5% -Pt/SrBi2Ta2O9400 powder, X photoelectron spectroscopy (FIG. 6) showed 1.5% -Pt/SrBi2Ta2O9Part of Pt on 400 powder0Is converted into Pt2+The ratio of the three Pt valence states is Pt0:Pt2+:Pt 4+40 percent, 35 percent and 28 percent. Will contain 0.5g of 1.5% -Pt/SrBi2Ta2O9Calcining the crucible of the powder at 500 ℃ to obtain 2% -Pt/SrBi2Ta2O9500 powder, X photoelectron spectroscopy (FIG. 7) showed 1.5% -Pt/SrBi2Ta2O9-500 powder with a portion of Pt0Is converted into Pt2+The ratio of the three Pt valence states isPt0:Pt2+:Pt4+21 percent, 49 percent and 30 percent. Pt after calcination0、Pt2+And Pt4+The variation of the relative content (as shown in fig. 8) shows the variation of the three Pt valence states after calcination at 300 ℃, 400 ℃ and 500 ℃. Pt0The relative content of (A) is 1.5% -Pt/SrBi2Ta2O968% of the total weight, after calcination, Pt0The relative content of (A) is reduced by 20 percent (1.5 percent-Pt/SrBi)2Ta2O9Calcined at 300 ℃) and 29 percent (1.5 percent-Pt/SrBi2Ta2O9Calcined at 400 ℃) and 48 percent (1.5 percent-Pt/SrBi2Ta2O9After calcination at 500 ℃). Pt2+The relative content of (A) is 1.5% -Pt/SrBi2Ta2O90 in, after calcination, Pt2+The relative content of (A) is increased by 18% (1.5% -Pt/SrBi)2Ta2O9Calcined at 300 ℃) and 32% (1.5% -Pt/SrBi2Ta2O9Calcined at 400 ℃) and 49% (1.5% -Pt/SrBi2Ta2O9After calcination at 500 ℃). Pt4+The relative content of (A) is 1.5% -Pt/SrBi2Ta2O932% in, and after calcination, Pt4+The relative content of (A) is less changed (the variation is less than or equal to 3 percent).
Example 1:
step 1: 0.5g of 1.5% -Pt/SrBi is weighed2Ta2O9；
Step 2: transferring the substance obtained in the step 1 into a crucible and placing the crucible in a muffle furnace for calcining; the calcination conditions were: the heating rate is 2.2 ℃/min, the calcining temperature is 300 ℃, and the time is 3 h; after the calcination is finished, the temperature is reduced to the room temperature along with the furnace to obtain a sample;
and step 3: the obtained product is named as 1.5% -Pt/SrBi2Ta2O9300, the ratio of three Pt valence states in the Pt nano particles is Pt0:Pt2+:Pt4+＝49％:16％:33％。
Example 2:
step 1: balanceTaking 0.5g of 1.5% -Pt/SrBi2Ta2O9；
Step 2: transferring the substance obtained in the step 1 into a crucible and placing the crucible in a muffle furnace for calcining; the calcination conditions were: the heating rate is 2.2 ℃/min, the calcining temperature is 400 ℃, and the time is 3 h; after the calcination is finished, the temperature is reduced to the room temperature along with the furnace to obtain a sample;
and step 3: the obtained product is named as 1.5% -Pt/SrBi2Ta2O9400, the ratio of three Pt valence states in the Pt nano particles is Pt0:Pt2+:Pt4+＝40％:35％:28％。
Example 3:
step 1: 0.5g of 1.5% -Pt/SrBi is weighed2Ta2O9；
Step 2: transferring the substance obtained in the step 1 into a crucible and placing the crucible in a muffle furnace for calcining; the calcination conditions were: the heating rate is 2.2 ℃/min, the calcining temperature is 500 ℃, and the time is 3 h; after the calcination is finished, the temperature is reduced to the room temperature along with the furnace to obtain a sample;
and step 3: the obtained product is named as 1.5% -Pt/SrBi2Ta2O9400, the ratio of three Pt valence states in the Pt nano particles is Pt0:Pt2+:Pt4+＝21％:49％:30％。
Claims (9)
1. A method for preparing monodisperse Pt nanoparticles on an oxide substrate, comprising the steps of:
step 1: preparing an oxide precursor by a molten salt method and a high-temperature solid phase method;
step 2: adding an oxide precursor into a Pt aqueous solution to obtain an oxide-containing precursor solution;
and step 3: irradiating the oxide-containing precursor solution obtained in the step 2 by using ultraviolet light, and stirring the solution by using a magnetic stirrer;
and 4, step 4: after the photochemical reaction is finished, filtering, washing and drying, obtaining monodisperse Pt nano particles on the surface of the precursor;
and 5: calcining the monodisperse Pt nanoparticles obtained in the step (4) for 3h at the temperature of 300 ℃, 400 ℃ and 500 ℃ respectively, and cooling to obtain monodisperse Pt nanoparticles with different oxidation states;
the oxide precursor is SrBi2Ta2O9。
2. The method for preparing monodisperse Pt nanoparticles on an oxide substrate as claimed in claim 1, wherein the source of Pt in step 2 is platinum chloride, platinum flake, chloroplatinic acid.
3. The method for preparing monodisperse Pt nanoparticles on oxide substrate as claimed in claim 1, wherein the ultraviolet light wavelength of step 3 is 365nm, and the irradiation intensity is 20mW/cm2。
4. The method for preparing monodisperse Pt nanoparticles on an oxide substrate according to claim 1, wherein the stirrer rotation speed of the step 3 is 500 rpm, and the stirring reaction time is 4 hours.
5. The method of claim 1, wherein the oxide precursor-containing solution is photochemically reacted at a temperature of 25 ℃.
6. The method for preparing monodisperse Pt nanoparticles on an oxide substrate according to claim 1, wherein the drying temperature of step 4 is 60 ℃ and the drying time is 10 hours.
7. The method for preparing monodisperse Pt nanoparticles on an oxide substrate according to claim 1, wherein the heating rate during the calcination is 2.2 ℃/min.
8. The method for preparing monodisperse Pt nanoparticles on an oxide substrate according to claim 1, wherein the mass concentration of the aqueous solution of Pt in step 1 is 0.025g/L, and the mass concentration of the oxide precursor added is 1.25 g/L.
9. The method of claim 1, wherein the ratio of the three Pt valence states is Pt at the calcination temperature of 300 ℃0:Pt2+:Pt4+49 percent, 16 percent and 33 percent; the ratio of three Pt valence states is Pt when the calcining temperature is 400 DEG C0:Pt2+:Pt4+40%: 35%: 28%, and the ratio of three Pt valence states is Pt when the calcining temperature is 500 deg.C0:Pt2+:Pt4+＝21％:49％:30％。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069384.5A CN109794242B (en) | 2019-01-24 | 2019-01-24 | Method for preparing monodisperse Pt nano particles on oxide substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910069384.5A CN109794242B (en) | 2019-01-24 | 2019-01-24 | Method for preparing monodisperse Pt nano particles on oxide substrate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109794242A CN109794242A (en) | 2019-05-24 |
| CN109794242B true CN109794242B (en) | 2022-02-11 |
Family
ID=66560359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910069384.5A Active CN109794242B (en) | 2019-01-24 | 2019-01-24 | Method for preparing monodisperse Pt nano particles on oxide substrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109794242B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1537178A (en) * | 1998-12-09 | 2004-10-13 | �����ɷ� | CVD process for preparing feeri electric films using bi alcoxides |
| WO2008094211A3 (en) * | 2006-08-07 | 2008-11-20 | Univ Pennsylvania | Tunable ferroelectric supported catalysts and method and uses thereof |
| CN103263917A (en) * | 2013-04-25 | 2013-08-28 | 浙江大学 | Preparation method of Pt-BaTiO3 nano-catalyst for CO catalytic oxidation |
| CN102990077B (en) * | 2012-12-24 | 2014-10-01 | 中国科学院新疆理化技术研究所 | Method for growing bismuth nanoparticles on oxide substrate in situ |
| CN108492993A (en) * | 2018-03-13 | 2018-09-04 | 北京科技大学 | A kind of noble metal decorated TiO2-BaTiO3Core-shell nano linear array complex light anode and preparation method |
| CN108889325A (en) * | 2018-06-28 | 2018-11-27 | 陕西科技大学 | A kind of synthetic method of Pt nanoparticle catalyst |
-
2019
- 2019-01-24 CN CN201910069384.5A patent/CN109794242B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1537178A (en) * | 1998-12-09 | 2004-10-13 | �����ɷ� | CVD process for preparing feeri electric films using bi alcoxides |
| WO2008094211A3 (en) * | 2006-08-07 | 2008-11-20 | Univ Pennsylvania | Tunable ferroelectric supported catalysts and method and uses thereof |
| CN102990077B (en) * | 2012-12-24 | 2014-10-01 | 中国科学院新疆理化技术研究所 | Method for growing bismuth nanoparticles on oxide substrate in situ |
| CN103263917A (en) * | 2013-04-25 | 2013-08-28 | 浙江大学 | Preparation method of Pt-BaTiO3 nano-catalyst for CO catalytic oxidation |
| CN108492993A (en) * | 2018-03-13 | 2018-09-04 | 北京科技大学 | A kind of noble metal decorated TiO2-BaTiO3Core-shell nano linear array complex light anode and preparation method |
| CN108889325A (en) * | 2018-06-28 | 2018-11-27 | 陕西科技大学 | A kind of synthetic method of Pt nanoparticle catalyst |
Non-Patent Citations (4)
| Title |
|---|
| "Exceptionally large third-order optical susceptibility in Ag:SrBi2Ng2O9 composite films";Rui Song et al.;《Material Letters》;20070810;第61卷;第1537-1539页 * |
| "Silver-Modified Nanosized Ferroelectrics as a Novel Photocatalyst";Ran Su et al.;《Communications》;20140903;第11卷(第2期);第202-207页 * |
| "负载型铂纳米粒子催化剂上甲醛低温催化氧化性能研究";崔唯怡;《中国博士学位论文全文数据库》;20170315(第03期);B014-71 * |
| Correlation between the pt2+/pt4+ ration and the catalytic activity for the CO oxidation of Ba12[BaxPt3-x]Pt6O27(0≤x≤3);F.Grasset et al.;《Material Research Bulletin》;20000308;第34卷(第12期);第2101-2108页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109794242A (en) | 2019-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Tong et al. | Polymorphous ZnO complex architectures: selective synthesis, mechanism, surface area and Zn-polar plane-codetermining antibacterial activity | |
| Ibarguen et al. | Synthesis of SnO2 nanoparticles through the controlled precipitation route | |
| Rodrıguez-Paéz et al. | Controlled precipitation methods: formation mechanism of ZnO nanoparticles | |
| JP2008013846A (en) | Method for producing metal nanoparticle, and metal nanoparticle | |
| CN105397103A (en) | Nano-silver/graphene composite material and preparation method thereof | |
| Baqer et al. | Copper oxide nanoparticles synthesized by a heat treatment approach with structural, morphological and optical characteristics | |
| CN109650424B (en) | Amorphous alumina octahedral particle and preparation method thereof | |
| Beshkar et al. | Novel dendrite-like CuCr 2 O 4 photocatalyst prepared by a simple route in order to remove of Azo Dye in textile and dyeing wastewater | |
| CN108339562B (en) | Preparation method of iron ion doped carbon nitride nanotube and obtained product | |
| KR101074152B1 (en) | The method for synthesizing nano-sized yttria power using pva at the low temperature | |
| Shenoy et al. | A simple single-step approach towards synthesis of nanofluids containing cuboctahedral cuprous oxide particles using glucose reduction | |
| IL172838A (en) | Methods for production of metal oxide nano particles with controlled properties and nano particles and preparations produced thereby | |
| CN108993508B (en) | Regular cobalt-silicon nanosphere multiphase Fenton catalyst and preparation method and application thereof | |
| Wang et al. | Controllable synthesis of metastable γ-Bi2O3 architectures and optical properties | |
| Kaur et al. | Visible–light induced photocatalytic degradation of fungicide with Fe and Si doped TiO2 nanoparticles | |
| Jia et al. | Using sonochemistry for the fabrication of hollow ZnO microspheres | |
| Pauzi et al. | Microwave-assisted synthesis of ZnO nanoparticles stabilized with gum arabic: Effect of microwave irradiation time on ZnO nanoparticles size and morphology | |
| Susanti et al. | Comparison of the morphology and structure of WO 3 nanomaterials synthesized by a sol-gel method followed by calcination or hydrothermal treatment | |
| CN113443650B (en) | Method for preparing nano titanate by utilizing self-release of crystal water | |
| KR20130070092A (en) | Method for producing yttrium oxide powders and yttrium oxide powders prepared by the method | |
| Arul et al. | Visible light proven Si doped TiO2 nanocatalyst for the photodegradation of Organic dye | |
| CN109794242B (en) | Method for preparing monodisperse Pt nano particles on oxide substrate | |
| CN103862062A (en) | Composite material of copper nano particles evenly doped with submicron carbon spheres and one-step synthesis method thereof | |
| Calatayud et al. | V-containing ZrO 2 inorganic yellow nano-pigments | |
| Hazrati et al. | The effects of altering reaction conditions in green sonochemical synthesis of a thallium (I) coordination polymer and in achieving to different morphologies of thallium (III) oxide nanostructures via solid-state process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |