CN114849737B - Flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst and application thereof - Google Patents
Flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst and application thereof Download PDFInfo
- Publication number
- CN114849737B CN114849737B CN202210546215.8A CN202210546215A CN114849737B CN 114849737 B CN114849737 B CN 114849737B CN 202210546215 A CN202210546215 A CN 202210546215A CN 114849737 B CN114849737 B CN 114849737B
- Authority
- CN
- China
- Prior art keywords
- flower
- sulfide
- cadmium sulfide
- silver
- quantum dot
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
- B01J27/04—Sulfides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/40—Carbon monoxide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Catalysts (AREA)
Abstract
一种花状硫化镉/硫化银量子点复合光催化剂的制备方法及其应用，属于光催化技术领域，所述光催化材料为硫化银量子点通过沉积吸附在花状硫化镉纳米片上，具体过程：1)利用油浴法制得花状硫化镉纳米片；2)通过油浴法制备硫化银量子点；3)将花状硫化镉纳米片，硫化银量子点加入到无水乙醇中搅拌24h后蒸干；4)将产物用无水乙醇洗涤，干燥后即可得到所述花状硫化镉/硫化银复合光催化材料。本发明花状硫化镉/硫化银量子点复合光催化材料应用于光催化二氧化碳还原中时，在可见光照射下，其CO生成速率高达16.6μmol·g‑1·h‑1,在光催化二氧化碳还原领域具有潜在的应用前景。
A preparation method and application of a flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst, which belongs to the field of photocatalysis technology. The photocatalytic material is that silver sulfide quantum dots are deposited and adsorbed on flower-shaped cadmium sulfide nanosheets. The specific process: 1) Flower-shaped cadmium sulfide nanosheets were prepared by oil bath method; 2) Silver sulfide quantum dots were prepared by oil bath method; 3) Flower-shaped cadmium sulfide nanosheets and silver sulfide quantum dots were added to absolute ethanol and stirred for 24 hours, then evaporated 4) washing the product with absolute ethanol and drying to obtain the flower-shaped cadmium sulfide/silver sulfide composite photocatalytic material. When the flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalytic material of the present invention is applied to the photocatalytic carbon dioxide reduction, its CO production rate is as high as 16.6 μmol g ‑1 h ‑1 under the irradiation of visible light. field has potential application prospects.
Description
技术领域technical field
本发明属于光催化技术领域，特别涉及一种可以高效和选择性光催化还原二氧化碳的花状硫化镉/硫化银量子点复合光催化剂及其应用The invention belongs to the technical field of photocatalysis, in particular to a flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst capable of efficiently and selectively photocatalytically reducing carbon dioxide and its application
背景技术Background technique
传统化石能源都属于不可再生能源，且化石能源燃烧产生了大量的二氧化碳(CO2)，打破了自然界的碳循环平衡。近年来，不断兴起的光催化技术利用太阳能激发半导体光催化材料产生光生电子-空穴，以诱发氧化还原反应，将CO2转化为可储存的碳氢燃料，例如甲烷(CH4)、甲醇(CH3OH)，被认为是最具前景的CO2转化途径之一，颇具研究价值。Traditional fossil energy is non-renewable energy, and the combustion of fossil energy produces a large amount of carbon dioxide (CO 2 ), which breaks the balance of carbon cycle in nature. In recent years, the emerging photocatalytic technology utilizes solar energy to excite semiconductor photocatalytic materials to generate photogenerated electrons-holes to induce redox reactions and convert CO 2 into storable hydrocarbon fuels, such as methane (CH 4 ), methanol ( CH 3 OH), is considered to be one of the most promising CO 2 conversion pathways, and is of considerable research value.
CdS作为II-VI族直接带隙半导体材料，其禁带宽度仅为2.4eV，相应的本征光吸收带边为517nm，因此有着良好的太阳光吸收性能和能级结构，使其在可见光甚至近红外光区都可以进行光催化反应。但单一硫化镉内部的电子空穴对复合速率较快，光生载流子密度低，阻碍了光生电子和空穴的分离与转移，导致了光催化活性较低。As a II-VI direct bandgap semiconductor material, CdS has a forbidden band width of only 2.4eV and a corresponding intrinsic light absorption band edge of 517nm. Photocatalytic reactions can be carried out in the near-infrared region. However, the recombination rate of electron-hole pairs inside a single cadmium sulfide is fast, and the density of photogenerated carriers is low, which hinders the separation and transfer of photogenerated electrons and holes, resulting in low photocatalytic activity.
因此，如何解决光生电子对复合快，光吸收效率低下，设计合成高效的硫化镉光催化剂，以进一步提高光催化性能具有重要研究意义。Therefore, how to solve the fast recombination of photogenerated electron pairs and low light absorption efficiency, and design and synthesize highly efficient cadmium sulfide photocatalysts to further improve the photocatalytic performance have important research significance.
发明内容Contents of the invention
本发明的目的在于，针对背景技术中存在的问题，提供一种花状硫化镉/硫化银量子点复合光催化剂的制备方法及其应用，该光催化剂能有效改善单一硫化镉光生电子对复合快、光吸收不理想的问题，并提高了CO的产率。The purpose of the present invention is to, aiming at the problems existing in the background technology, provide a kind of preparation method and its application of flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst, this photocatalyst can effectively improve single cadmium sulfide photogenerated electron pair recombination fast, The problem of suboptimal light absorption and improved CO yield.
为实现上述目的，本发明采用的技术方案如下：To achieve the above object, the technical scheme adopted in the present invention is as follows:
一种花状硫化镉/硫化银量子点复合光催化剂，所述光催化材料为硫化银量子点和花状硫化镉纳米片形成的复合材料，其中所述硫化银量子点为球状，直径为5～10nm；所述硫化镉纳米片为矩形，厚度为3～5nm，其构成的花状结构直径为150～200nm，高度为20～40nm；所述硫化银量子点与硫化镉的质量比为1:20。A flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst, the photocatalytic material is a composite material formed of silver sulfide quantum dots and flower-shaped cadmium sulfide nanosheets, wherein the silver sulfide quantum dots are spherical and have a diameter of 5-5. 10nm; the cadmium sulfide nanosheet is rectangular, and the thickness is 3～5nm, and the flower-like structure diameter that it forms is 150～200nm, and height is 20～40nm; The mass ratio of described silver sulfide quantum dot and cadmium sulfide is 1: 20.
一种花状硫化镉/硫化银量子点复合光催化剂的制备方法，包括以下步骤：A preparation method of a flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst, comprising the following steps:
S1、将5mmol柠檬酸钠均匀溶解在50mL去离子水中，然后，将10mL0.3mol/L氯化镉添加到混合溶液中，搅拌20分钟后，依次向溶液中滴加5mL氨水(25～28wt％)和10mL0.9mol/L硫脲，然后将均匀的橙色悬浊液转移到油浴锅中，在60℃下保持3h，反应冷却后，离心收集生成的橙色沉淀，用去离子水和乙醇洗涤数次，然后在60℃烘箱中干燥12h以上；S1, 5mmol sodium citrate is uniformly dissolved in 50mL deionized water, then, 10mL0.3mol/L cadmium chloride is added in the mixed solution, after stirring for 20 minutes, 5mL ammonia water (25～28wt% ) and 10mL0.9mol/L thiourea, then transfer the uniform orange suspension to an oil bath, keep it at 60°C for 3h, after the reaction is cooled, centrifuge to collect the resulting orange precipitate, wash with deionized water and ethanol Several times, then dry in a 60°C oven for more than 12 hours;
S2、油浴法制备硫化银量子点：向三口烧瓶中加入10mL乙二醇(EG)，通入N230 min以完全排除***中的空气，在整个反应过程中，在液体上方连续注入N2，加热至110℃，依次加入0.05mol硝酸银和0.1mL的3-巯基丙酸，待反应物混合均匀后，升温至145℃，保温15分钟，在此期间，反应液逐渐由清澈透明变为酒红色，最后变为黑褐色，然后，将溶液冷却至室温以获得样品，最后，通过加入去离子水、离心和去离子水和乙醇洗涤来沉淀量子点；S2. Preparation of silver sulfide quantum dots by oil bath method: add 10 mL of ethylene glycol (EG) to the three-necked flask, and pass N 2 for 30 min to completely remove the air in the system. During the entire reaction process, continuously inject N over the liquid 2. Heat to 110°C, add 0.05mol silver nitrate and 0.1mL 3-mercaptopropionic acid in turn, after the reactants are evenly mixed, raise the temperature to 145°C, keep it warm for 15 minutes, during this period, the reaction solution gradually changes from clear to transparent. It is wine red, and finally turns dark brown. Then, the solution is cooled to room temperature to obtain a sample, and finally, the quantum dots are precipitated by adding deionized water, centrifuging and washing with deionized water and ethanol;
S3、制备花状硫化镉/硫化银量子点复合光催化剂：将0.2g的CdS纳米片和0.01g的Ag2S量子点添加到20mL乙醇中，搅拌2h，将混合溶液转入60℃烘箱中24h，直至乙醇完全挥发。S3. Preparation of flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst: Add 0.2g of CdS nanosheets and 0.01g of Ag 2 S quantum dots to 20mL of ethanol, stir for 2h, and transfer the mixed solution into an oven at 60°C 24h until ethanol evaporates completely.
由上述制备方法得到的花状硫化镉/硫化银量子点复合光催化剂。The flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst obtained by the above preparation method.
本发明与现有技术相比，具有以下显著优点：Compared with the prior art, the present invention has the following significant advantages:
(1)本发明制备的花状硫化镉/硫化银量子点复合光催化剂，与其他贵金属催化剂，以及传统的光催化剂相比，其具有2D片层状结构堆积形成的花状结构，从而获得更大比表面积，增大了CO2接触面积，提高反应速率。(1) The flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst prepared by the present invention, compared with other noble metal catalysts and traditional photocatalysts, has a flower-like structure formed by stacking 2D sheet-like structures, thereby obtaining more The large specific surface area increases the CO2 contact area and increases the reaction rate.
(2)本发明中通过引入硫化银量子点，拓宽硫化镉的可见光吸收范围，降低了电子转移阻抗，促进了电子转移，同时硫化银作为电子受体，反应光照过程中产生的光生电子，促进光生电子对的进一步分离，从而提高材料的光催化活性。(2) In the present invention, by introducing silver sulfide quantum dots, the visible light absorption range of cadmium sulfide is widened, electron transfer resistance is reduced, and electron transfer is promoted. The further separation of photogenerated electron pairs improves the photocatalytic activity of the material.
(3)本发明制备的花状硫化镉/硫化银量子点复合光催化剂，可应用于光照CO2还原，CO产率高，推广应用有很大优势。(3) The flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst prepared by the present invention can be applied to the reduction of CO 2 under light, and the yield of CO is high, which has great advantages in popularization and application.
附图说明Description of drawings
图1中a为实验例1所制备的花状硫化镉/硫化银量子点的扫描电镜(SEM)图片，b为实验例1所制备的花状硫化镉/硫化银量子点的透射电镜(TEM)照片；Among Fig. 1, a is the scanning electron microscope (SEM) picture of the flower-shaped cadmium sulfide/silver sulfide quantum dot prepared by Experimental Example 1, and b is the transmission electron microscope (TEM) of the flower-shaped cadmium sulfide/silver sulfide quantum dot prepared by Experimental Example 1 )photo;
图2为本发明实验例1所制备的花状硫化镉/硫化银量子点的高倍透射电镜(HRTEM)照片；Fig. 2 is the high magnification transmission electron microscope (HRTEM) photograph of the flower-shaped cadmium sulfide/silver sulfide quantum dot prepared by Experimental Example 1 of the present invention;
图3为本发明实验例1，对比例1，对比例4所制备材料的XRD衍射图谱；Fig. 3 is experimental example 1 of the present invention, comparative example 1, the XRD diffraction pattern of the material prepared in comparative example 4;
图4为本发明实验例1、对比例1、例2、例3、例4所制备材料的紫外-可见光漫反射光谱；Fig. 4 is the ultraviolet-visible light diffuse reflectance spectrum of the material prepared by Experimental Example 1, Comparative Example 1, Example 2, Example 3, and Example 4 of the present invention;
图5为本发明实验例1、对比例1、例2、例3、例4所制备材料在可见光辐射下的光催化二氧化碳还原的产物生成速率对比图。Fig. 5 is a comparison chart of product formation rates of photocatalytic carbon dioxide reduction of materials prepared in Experimental Example 1, Comparative Example 1, Example 2, Example 3, and Example 4 of the present invention under visible light radiation.
具体实施方式Detailed ways
以下采用具体实施例来进一步说明本发明。应理解，所举实施例的目的在于进一步阐述本发明的内容，而不能在任何意义上解释为对本发明保护范围的限制。The following specific examples are used to further illustrate the present invention. It should be understood that the purpose of the examples given is to further illustrate the content of the present invention, and should not be construed as limiting the protection scope of the present invention in any sense.
实施例1Example 1
油浴法制备花状硫化镉纳米片：将5mmol柠檬酸钠均匀溶解在50mL去离子水中，然后，将10mL的0.3mol/L氯化镉添加到混合溶液中，搅拌20分钟后，依次向溶液中滴加5mL氨水(25～28wt％)和10mL的0.9mol/L硫脲，然后将均匀的橙色悬浊液转移到油浴锅中，在60℃下保持3h，反应冷却后，离心收集生成的橙色沉淀，用去离子水和乙醇洗涤数次，然后在60℃烘箱中干燥12h以上。Preparation of flower-shaped cadmium sulfide nanosheets by oil bath method: 5 mmol sodium citrate was uniformly dissolved in 50 mL deionized water, then 10 mL of 0.3 mol/L cadmium chloride was added to the mixed solution, stirred for 20 minutes, and then added to the solution Add 5mL of ammonia water (25-28wt%) and 10mL of 0.9mol/L thiourea dropwise, then transfer the uniform orange suspension to an oil bath, keep it at 60°C for 3h, after the reaction cools down, centrifuge to collect The orange precipitate was washed several times with deionized water and ethanol, and then dried in an oven at 60 °C for more than 12 h.
油浴法制备硫化银量子点：向三口烧瓶中加入10mL乙二醇(EG)，通入N2 30min以完全排除***中的空气，在整个反应过程中，在液体上方连续注入N2，加热至110℃，依次加入0.05mol硝酸银和0.1mL的3-巯基丙酸。待反应物混合均匀后，升温至145℃，保温15分钟，在此期间，反应液逐渐由清澈透明变为酒红色，最后变为黑褐色。然后，将溶液冷却至室温以获得样品。最后，通过加入去离子水、离心和去离子水和乙醇洗涤来沉淀量子点。Preparation of silver sulfide quantum dots by oil bath method: add 10mL ethylene glycol (EG) to the three-necked flask, and pass through N2 for 30min to completely remove the air in the system. During the whole reaction process, continuously inject N2 above the liquid, heat To 110°C, add 0.05mol silver nitrate and 0.1mL 3-mercaptopropionic acid in sequence. After the reactants are evenly mixed, raise the temperature to 145°C and keep the temperature for 15 minutes. During this period, the reaction solution gradually changes from clear and transparent to wine red, and finally dark brown. Then, the solution was cooled to room temperature to obtain a sample. Finally, the quantum dots were precipitated by adding deionized water, centrifuging and washing with deionized water and ethanol.
沉积吸附制备花状硫化镉/硫化银量子点复合光催化剂：将0.2g的CdS纳米片和0.01g的Ag2S量子点添加到20mL乙醇中，搅拌2h。将混合溶液转入60℃烘箱中24h，直至乙醇完全挥发，所得产物即为花状硫化镉/硫化银量子点复合光催化剂。Preparation of flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst by deposition and adsorption: 0.2g of CdS nanosheets and 0.01g of Ag 2 S quantum dots were added to 20mL of ethanol and stirred for 2h. The mixed solution was transferred to an oven at 60° C. for 24 hours until the ethanol was completely volatilized, and the obtained product was a flower-shaped cadmium sulfide/silver sulfide quantum dot composite photocatalyst.
对比例1Comparative example 1
为了验证花状硫化镉/硫化银量子点复合光催化剂相对花状硫化镉的性能提升，与实验例1相比，省去了步骤2、3，直接进行步骤1得到的花状硫化镉纳米片，得到的产物标记为CAO。In order to verify the performance improvement of the flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst relative to the flower-like cadmium sulfide, compared with the experimental example 1,
对比例2Comparative example 2
本对比例中的制备方法与实验例1相同，区别仅在于本对比例的步骤3加入的硫化银量子点的质量是花状硫化镉理论质量的2％，其余条件不变。The preparation method in this comparative example is the same as that in Experimental Example 1, except that the mass of silver sulfide quantum dots added in
对比例3Comparative example 3
本对比例中的制备方法与实验例1相同，区别仅在于本对比例的步骤3加入的硫化银量子点的质量是花状硫化镉理论质量的8％，其余条件不变。The preparation method in this comparative example is the same as that in Experimental Example 1, except that the mass of silver sulfide quantum dots added in
对比例4Comparative example 4
本对比例中的制备方法与实验例1相同，区别仅在于本对比例的步骤3加入的硫化银量子点的质量是花状硫化镉理论质量的10％，其余条件不变。The preparation method in this comparative example is the same as that in Experimental Example 1, the only difference is that the mass of silver sulfide quantum dots added in
对上述实验例1，对比例1、例2、例3、例4中所得材料进行光催化还原二氧化碳活性实验，具体步骤如下：To above-mentioned experimental example 1, the material obtained in comparative example 1, example 2, example 3, example 4 is carried out photocatalytic reduction carbon dioxide active experiment, concrete steps are as follows:
(1)取30mg样品溶于4mL乙醇并超声分散成均匀溶液；(1) Dissolve 30mg of sample in 4mL of ethanol and ultrasonically disperse into a uniform solution;
(2)将上述溶液均匀分散在浅盘中，然后放入烘箱中，在60℃下烘干成膜状；(2) Evenly disperse the above solution in a shallow pan, then put it into an oven, and dry it at 60°C to form a film;
(3)将上述浅盘放在光催化在线分析***(Perfect Light Labsolar 6A)的玻璃反应器底部，并在浅盘上滴加0.5mL去离子水，然后用真空脂密封反应器；(3) Place the above-mentioned shallow dish on the bottom of the glass reactor of the photocatalytic online analysis system (Perfect Light Labsolar 6A), and drop 0.5mL deionized water on the shallow dish, and then seal the reactor with vacuum grease;
(4)反应器抽真空，然后通入二氧化碳，设置循环时间为30min，进行4h左右循环测试；***压力保持在70～80Kpa，使用300W氙灯作为光源进行光催化还原CO2实验。通过气相色谱检测二氧化碳光还原的产物。(4) The reactor is evacuated, then carbon dioxide is introduced, the cycle time is set to 30min, and the cycle test is carried out for about 4h; the system pressure is maintained at 70-80Kpa, and a 300W xenon lamp is used as the light source to conduct photocatalytic CO2 reduction experiments. Products of carbon dioxide photoreduction were detected by gas chromatography.
图1中a为实验例1所制备的花状硫化镉/硫化银量子点的扫描电镜(SEM)图片，b为实验例1所制备的花状硫化镉/硫化银量子点的透射电镜(TEM)照片；可以看出，硫化银量子点成功负载在硫化镉纳米片上。Among Fig. 1, a is the scanning electron microscope (SEM) picture of the flower-shaped cadmium sulfide/silver sulfide quantum dot prepared by Experimental Example 1, and b is the transmission electron microscope (TEM) of the flower-shaped cadmium sulfide/silver sulfide quantum dot prepared by Experimental Example 1 ) photo; it can be seen that silver sulfide quantum dots are successfully supported on cadmium sulfide nanosheets.
图2为本发明实验例1所制备的花状硫化镉/硫化银量子点的高倍透射电镜(HRTEM)照片；可以看到硫化镉和硫化银量子点的晶格条纹，其中0.36nm的晶格条纹对应硫化镉的(111)晶面，0.24nm的晶格条纹对应于硫化银量子点的(200)晶面。Fig. 2 is the high-magnification transmission electron microscope (HRTEM) photo of the flower-shaped cadmium sulfide/silver sulfide quantum dot prepared by Experimental Example 1 of the present invention; the lattice fringes of cadmium sulfide and silver sulfide quantum dot can be seen, wherein the crystal lattice of 0.36nm The stripes correspond to the (111) crystal plane of cadmium sulfide, and the 0.24nm lattice stripes correspond to the (200) crystal plane of the silver sulfide quantum dots.
图3为本发明实验例1，对比例1，对比例4所制备材料的XRD衍射图谱；可以看出复合材料中硫化银量子点成功负载在了花状硫化镉量子点上。Fig. 3 is the XRD diffraction pattern of the materials prepared in Experimental Example 1, Comparative Example 1 and Comparative Example 4 of the present invention; it can be seen that the silver sulfide quantum dots in the composite material are successfully supported on the flower-shaped cadmium sulfide quantum dots.
图4为本发明实验例1、对比例1、例2、例3、例4所制备材料的紫外-可见光漫反射光谱；可以看出，硫化银量子点的引入拓宽了可见光吸收范围，降低了禁带宽度。Fig. 4 is the ultraviolet-visible light diffuse reflectance spectrum of the material prepared by experimental example 1, comparative example 1, example 2, example 3, example 4 of the present invention; It can be seen that the introduction of silver sulfide quantum dots widens the range of visible light absorption, reduces the Bandwidth.
图5为本发明实验例1、对比例1、例2、例3、例4所制备材料在可见光辐射下的光催化二氧化碳还原的产物生成速率对比图；可以看出，CA5的CO生成速率达到了16.6μmol·g-1·h-1，远超CA0以及CA10的还原效率，体现了本发明所制备材料的优越性。Fig. 5 is the comparison chart of the product generation rate of the photocatalytic carbon dioxide reduction of the materials prepared in Experimental Example 1, Comparative Example 1, Example 2, Example 3 and Example 4 of the present invention under visible light radiation; it can be seen that the CO generation rate of CA5 reaches The reduction efficiency was 16.6 μmol·g -1 ·h -1 , far exceeding the reduction efficiency of CA0 and CA10, reflecting the superiority of the prepared material of the present invention.
应当指出，以上所述具体实施方式可以使本领域的技术人员更全面地理解本发明，但不以任何方式限制本发明。因此，本领域技术人员应当理解，仍然可以对本发明进行修改或者等同替换；而一切不脱离本发明的精神和技术实质的技术方案及其改进，其均应涵盖在本发明专利的保护范围当中。It should be pointed out that the specific embodiments described above can enable those skilled in the art to understand the present invention more comprehensively, but do not limit the present invention in any way. Therefore, those skilled in the art should understand that the present invention can still be modified or equivalently replaced; and all technical solutions and improvements that do not depart from the spirit and technical essence of the present invention should be covered by the protection scope of the patent of the present invention.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210546215.8A CN114849737B (en) | 2022-05-19 | 2022-05-19 | Flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210546215.8A CN114849737B (en) | 2022-05-19 | 2022-05-19 | Flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114849737A CN114849737A (en) | 2022-08-05 |
| CN114849737B true CN114849737B (en) | 2023-06-09 |
Family
ID=82640026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210546215.8A Expired - Fee Related CN114849737B (en) | 2022-05-19 | 2022-05-19 | Flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114849737B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116514159A (en) * | 2023-04-13 | 2023-08-01 | 阜阳师范大学 | Preparation method of CdS ultra-thin nanosheets and application of CdS ultra-thin nano-visible light properties |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227500A (en) * | 2019-06-14 | 2019-09-13 | 青岛科技大学 | A kind of Cd1-xZnxS-Ni/MoS2Composite photo-catalyst and preparation method thereof, application |
| CN111111695B (en) * | 2019-12-12 | 2021-12-03 | 电子科技大学 | Three-dimensional flower-shaped zinc-sulfur-cadmium photocatalytic material and preparation method and application thereof |
-
2022
- 2022-05-19 CN CN202210546215.8A patent/CN114849737B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN114849737A (en) | 2022-08-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109331883B (en) | A kind of CdS/metal organic framework composite photocatalytic material and its preparation method and application | |
| CN107008484B (en) | A kind of binary metal sulfide/carbon nitride composite photocatalytic material and preparation method thereof | |
| CN113856730B (en) | A copper single-atom material, its preparation method and its application in photocatalytic CO2 reduction | |
| CN113134392B (en) | perovskite-MOFs composite photocatalyst and preparation method and application thereof | |
| CN107790160A (en) | Phosphorus-doped zinc cadmium sulfide solid solution catalyst, photocatalytic system and method for producing hydrogen by decomposing water | |
| CN105709793B (en) | Niobium pentoxide nano stick/nitrogen-doped graphene composite photo-catalyst, preparation method and application of cadmium sulfide nano-particles modification | |
| CN105771948B (en) | The preparation method of bivalve titanium deoxide catalyst with high photocatalysis hydrogen production performance | |
| CN114377708B (en) | Bismuth oxide carbonate nano-sheet containing oxygen vacancy and preparation method and application thereof | |
| CN109985653A (en) | A kind of carbon nitride-based material for photocatalytic total water splitting and its preparation and application | |
| CN115920929B (en) | MoO3-x/Cu0.5Cd0.5S composite photocatalyst, preparation method and application | |
| CN106582888A (en) | A kind of TiO2-Pd-PPy composite photocatalyst and its preparation method and application | |
| CN114849737B (en) | Flower-like cadmium sulfide/silver sulfide quantum dot composite photocatalyst and application thereof | |
| CN114534783B (en) | Method for preparing single-atom Pt-embedded covalent organic framework photocatalyst and application thereof | |
| CN111632612B (en) | Indium phosphide-indium oxide p-n junction porous microsphere composite material and preparation method and application thereof | |
| CN113600221B (en) | Au/g-C 3 N 4 Monoatomic photocatalyst, and preparation method and application thereof | |
| An et al. | Enhancement of Ti 3 C 2 MXene on Au@ Ag/TiO 2 for the visible-light-driven photoreduction of nitroaromatics | |
| CN115282986A (en) | Two-dimensional sulfur indium zinc photocatalyst doped with-vacancy double sites as well as preparation method and application thereof | |
| CN113058601B (en) | Preparation method and application of ternary composite catalyst for photocatalytic water splitting to hydrogen production | |
| CN113856753A (en) | COF-5/CoAl-LDH heterojunction composite photocatalyst and preparation method and application thereof | |
| CN117358260B (en) | A double heterojunction structure photocatalyst and its preparation method and application | |
| CN115920945B (en) | A hydroxylated graphite phase carbon nitride photocatalyst and its preparation method and application | |
| CN115090298B (en) | Preparation method of copper-doped tin disulfide composite photocatalytic material | |
| CN107008337A (en) | A kind of non-stoichiometric bismuthic acid copper nano material and its preparation method and application | |
| CN117258811A (en) | Bi (Bi) 19 S 27 Br 3 CoAl-LDH composite photocatalyst, and preparation method and application thereof | |
| CN112774659B (en) | A kind of graphene/hydrogenated indium oxide composite photocatalyst and preparation method thereof |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20230609 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |