CN106807344B - 一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂及其制备方法 - Google Patents
一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂及其制备方法 Download PDFInfo
- Publication number
- CN106807344B CN106807344B CN201611157665.9A CN201611157665A CN106807344B CN 106807344 B CN106807344 B CN 106807344B CN 201611157665 A CN201611157665 A CN 201611157665A CN 106807344 B CN106807344 B CN 106807344B
- Authority
- CN
- China
- Prior art keywords
- tio
- anatase
- titanium dioxide
- solution
- 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
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 135
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 33
- 229910010251 TiO2(B) Inorganic materials 0.000 title claims abstract description 25
- 239000003054 catalyst Substances 0.000 title claims abstract description 24
- 239000002131 composite material Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 230000003287 optical effect Effects 0.000 title claims abstract description 13
- 239000002086 nanomaterial Substances 0.000 title claims abstract description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 34
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 235000019441 ethanol Nutrition 0.000 claims abstract description 19
- 239000002096 quantum dot Substances 0.000 claims abstract description 18
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229920002415 Pluronic P-123 Polymers 0.000 claims abstract description 9
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000003197 catalytic effect Effects 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 3
- -1 polyoxyethylene Polymers 0.000 claims abstract description 3
- 239000010970 precious metal Substances 0.000 claims abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 17
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 12
- 239000013078 crystal Substances 0.000 claims description 8
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 239000011941 photocatalyst Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims 1
- SOQBVABWOPYFQZ-UHFFFAOYSA-N oxygen(2-);titanium(4+) Chemical compound [O-2].[O-2].[Ti+4] SOQBVABWOPYFQZ-UHFFFAOYSA-N 0.000 claims 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 17
- 239000001257 hydrogen Substances 0.000 abstract description 17
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 16
- 230000001699 photocatalysis Effects 0.000 abstract description 15
- 238000007146 photocatalysis Methods 0.000 abstract description 13
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010936 titanium Substances 0.000 abstract description 3
- 229910052719 titanium Inorganic materials 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000002253 acid Substances 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000002904 solvent Substances 0.000 abstract 1
- 238000010189 synthetic method Methods 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 33
- 239000007789 gas Substances 0.000 description 13
- 239000000047 product Substances 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 12
- 230000014759 maintenance of location Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001069 Raman spectroscopy Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 239000000376 reactant Substances 0.000 description 6
- 238000005119 centrifugation Methods 0.000 description 5
- 239000007795 chemical reaction product Substances 0.000 description 5
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 238000011160 research Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000005501 phase interface Effects 0.000 description 3
- LYCAIKOWRPUZTN-NMQOAUCRSA-N 1,2-dideuteriooxyethane Chemical compound [2H]OCCO[2H] LYCAIKOWRPUZTN-NMQOAUCRSA-N 0.000 description 2
- 239000011258 core-shell material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 238000001237 Raman spectrum Methods 0.000 description 1
- 229910010455 TiO2 (B) Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- HGWOWDFNMKCVLG-UHFFFAOYSA-N [O--].[O--].[Ti+4].[Ti+4] Chemical compound [O--].[O--].[Ti+4].[Ti+4] HGWOWDFNMKCVLG-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002071 nanotube Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/40—Catalysts, in general, characterised by their form or physical properties characterised by dimensions, e.g. grain size
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y40/00—Manufacture or treatment of nanostructures
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/04—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
- C01B3/042—Decomposition of water
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/10—Catalysts for performing the hydrogen forming reactions
- C01B2203/1041—Composition of the catalyst
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- General Health & Medical Sciences (AREA)
- Composite Materials (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Manufacturing & Machinery (AREA)
- Catalysts (AREA)
Abstract
本发明公开了一种复合纳米结构二氧化钛光催化剂及其制备方法,它是锐钛矿相二氧化钛量子点自组装生长在TiO2(B)二维纳米片表面上,形成的复合纳米结构二氧化钛光催化剂。制备方法是:在酸性条件下,以钛酸异丙酯为钛源,以聚氧乙烯‑聚氧丙烯‑聚氧乙烯(Pluronic P123)为结构导向剂,通过调节乙醇和乙二醇溶剂的体积比来调控TiO2(A)量子点和TiO2(B)相二维纳米片的不同质量比,实现钛矿相TiO2(A)量子点在TiO2(B)相二维纳米片上自组装生长。制备出的复合纳米结构二氧化钛光催化剂具有高的比表面积,在没有贵金属助催化剂负载的情况下,其产氢量达到商用光催化P25(Degussa)的45倍。本发明合成方法简单,制备条件可控,生产成本低,绿色环保。
Description
技术领域
本发明涉及一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂及其制备方法,主要应用于光催化分解水制取氢气,属于半导体光催化技术和氢气能源领域。
背景技术
自1972年,Fujishima和Hondo发现二氧化钛半导体电极在紫外光的照射下,能够分解水产生氢气和氧气,二氧化钛在光催化和电化学领域受到了广泛的重视。由于二氧化钛无毒无害,价格便宜且性能稳定,成为光催化产氢的一种重要的潜在应用材料。然而,单相二氧化钛催化剂由于其表面载流子复合严重,光催化产氢的性能相对比较低。近几年,科研工作者在提高二氧化钛的光催化性能方面做出了大量的研究,其中一个重要的提升产氢性能的方法就是制备TiO2异质结,利用异质结界面实现载流子分离,提高光催化产氢活性。文献报道,二氧化钛有四种晶型:金红石相,锐钛矿相,板钛矿相和青铜相(TiO2(B)),Li等人研究了锐钛矿相和金红石相的相界面对于二氧化钛光催化活性的影响,发现相界面的存在使得载流子有效地分离,减小光生电子空穴的重组。另外,tan等人合成了金红石和锐钛矿纳米棒和纳米管的核壳结构的二氧化钛,这种核壳结构不仅具有大的光吸收面积,并且相界面的存在有助于提高载流子的有效分离。然而,这些研究大都是针对金红石和锐钛矿两相的光催化性能的研究,而有关TiO2(B)的光催化性能的研究比较少,事实上,超薄的TiO2(B)纳米片具有一个敞开的通道能够使载流子在其自由移动,将有助于光催化分解水产氢。更重要的是,超薄的TiO2(B)纳米片的功函数为4.59eV,比金红石相(4.8eV)和锐钛矿相(5.1eV)的要小,该发明通过简单的水热合成实现锐钛矿相量子点在TiO2(B)纳米片表面自组装生长,制备的复合纳米结构光催化材料得到了比商业化P25钛白粉更优越的光催化性能。
发明内容
本发明的目的在于利用锐钛矿相和TiO2(B)优越的能带排列,提出一种工艺简单,成本较低的具有高催化活性的锐钛矿量子点和TiO2(B)二维纳米片复合二氧化钛纳米催化剂及其制备方法。
本发明提供的一种复合纳米结构二氧化钛光催化剂为锐钛矿相二氧化钛量子点自组装生长在TiO2(B)二维纳米片,其中锐钛矿在复合相中质量占比0.1%~43.7%。质量占比最优为 4%-10%。
本发明的制备方法主要通过控制乙醇和乙二醇的体积比,一步水热制备出锐钛矿量子点在二维TiO2(B)纳米片表面自主装生长的高效复合二氧化钛光催化剂。
本发明的具体制备步骤如下:
(1)在室温下,将5ml钛酸异丙酯(95%)滴加到3ml的盐酸(37%)中,搅拌15min,得到溶液A。
(2)1ml的聚氧乙烯-聚氧丙烯-聚氧乙烯(P123)滴加到10~100ml的乙醇中,搅拌15min,得到溶液B。
(3)然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C。
(4)然后向溶液C中加入乙二醇,其体积为100ml减去与步骤(2)中所加入的乙醇体积,搅拌5min,得到溶液D。
(5)将所得的溶液D放入聚四氟乙烯反应釜中,在150℃加热反应20h。
(6)待反应釜自然冷却到室温后,将样品取出,用酒精离心洗涤4次,烘干,研磨,即得到二氧化钛粉末光催化剂。
本发明的最佳参数的制备步骤如下:
1)在室温下,将5ml钛酸异丙酯滴加到3ml的盐酸中,搅拌15min,得到溶液A。
2)1ml的P123滴加到50ml的乙醇中,搅拌15min,得到溶液B。
3)然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C。
4)然后向溶液C中加入50ml的乙二醇,搅拌5min,得到溶液D。
5)将所得的溶液D放入聚四氟乙烯反应釜中,在150℃加热反应20h。
6)待反应釜自然冷却到室温后,将样品取出,用酒精离心洗涤4次,烘干,研磨,即得到二氧化钛粉末光催化剂。
本发明的优势在于:
制备所用的原料易得且成本低廉。
合成的工艺简单,条件易控。
提供了一种新型的高催化活性的锐钛矿相量子点和TiO2(B)二维纳米片复合二氧化钛催化剂,进一步扩展了催化剂领域。
附图说明
图1本发明实例1-5所制备的二氧化钛的粉末-X射线衍射图。结果显示通过调节乙醇和乙二醇的体积比,可以实现纯TiO2(B)相,纯锐钛矿TiO2(A)相,以及二者混合相(A+B)。
图2本发明实例1-5所制备的二氧化钛对应的拉曼光谱图。从拉曼光谱的峰位和峰面积可以确定,调节乙醇和乙二醇的体积比可以调控样品中纯锐钛矿TiO2(A)相的质量百分含量。
图3本发明实例1,3制备的二氧化钛对应的透射电镜图,a,b,c为实例1的透射电镜图,图中可以看出全部为TiO2(B)二维纳米片,纳米片表面暴露晶面为{100}晶面。d,e, f为实例3的透射电镜图,图中可以看出锐钛矿相量子点的尺寸大小为2-4nm,其在TiO2(B) 二维纳米片上自组装生长暴露的晶面为{010}晶面。
图4本发明实例1,5对应纯TiO2(B)相和纯锐钛矿TiO2(A)相能带图,从图中可以看出当锐钛矿相和TiO2(B)形成异质结时(对应于实例3),形成了II型能带结构,有助于载流子在界面分离,提高了光催化产氢活性。
图5本发明实例1-5对应二氧化钛的光催化在没有添加任何贵金属助催化剂的产氢的数据图,并与Douglas P25商用TiO2粉末进行了对比,说明锐钛矿相量子点在TiO2(B)二维纳米片形成的二氧化钛复合结构催化剂的产氢性能远远高于Douglas P25商用TiO2粉末。
具体实施方法
下面将对本发明的具体实施方式作案例说明,本实施案例在以本发明为技术方案的前提下实施,但本发明的保护范围不限于下述的实施案例。
实施案例1
在室温下,将5ml钛酸异丙酯滴加到3ml的盐酸中,搅拌15min,得到溶液A。1ml 的P123滴加到10ml乙醇中,搅拌15min,得到溶液B。然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C。然后向溶液中加入90ml乙二醇,搅拌5min,得到溶液D。将所得的溶液放入聚四氟乙烯反应釜中150℃反应20h。将水热反应产物离心、洗涤、干燥即得到产品,标记Et1,该产品的XRD和拉曼图显示该纯的TiO2(B),如图1和2所示。其比表面积为265.19m2g-1。将20mg制备好的二氧化钛粉末和80mL体积浓度为20%的甲醇溶液中(64mL去离子水和16mL甲醇)加入反应容器中,反应之前,容器中通半小时的氮气以排除容器中的空气。反应时,容器反应物一直有磁力搅拌器搅拌以保证催化剂均匀分散。一段时间后,取反应器中的气体1mL送入气相色谱仪中检测,将测得峰位的保留时间、峰面积与标准峰的保留时间、峰面积对比,计算后得到光催化制氢的效率为690μmol﹒h-1﹒g-1。
实施案例2
在室温下,将5ml钛酸异丙酯滴加到3ml的盐酸中,搅拌15min,得到溶液A。1ml 的P123滴加到20ml乙醇中,搅拌15min,得到溶液B。然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C。然后向溶液中加入80ml乙二醇,搅拌5min,得到溶液D。将所得的溶液放入聚四氟乙烯反应釜中150℃反应20h。将水热反应产物离心、洗涤、干燥即得到产品,标记Et2。该产品的XRD和拉曼图显示该纯的TiO2(B),如图1和2所示。其比表面积为288.162m2g-1。将20mg制备好的二氧化钛粉末和80mL体积浓度为20%的甲醇溶液中(64mL去离子水和16mL甲醇)加入反应容器中,反应之前,容器中会通半小时的氮气以排除容器中的空气。反应时,容器反应物一直有磁力搅拌器搅拌以保证催化剂均匀分散。一段时间后,取反应器中的气体1mL送入气相色谱仪中检测,将测得峰位的保留时间、峰面积与标准峰的保留时间、峰面积对比,计算后得到光催化制氢的效率为352μmol﹒h-1﹒g-1。实施案例3
在室温下,将5ml钛酸异丙酯滴加到3ml的盐酸中,搅拌15min,得到溶液A。1ml 的P123滴加到50ml乙醇中,搅拌15min,得到溶液B。然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C。然后向溶液中加入50ml乙二醇,搅拌5min,得到溶液D。将所得的溶液放入聚四氟乙烯反应釜中150℃反应20h。将水热反应产物离心、洗涤、干燥即得到产品,标记Et5,该产品拉曼图显示为锐钛矿相和TiO2(B)复合结构二氧化钛光催化剂,如图2所示,其锐钛矿含量为5.9%。其比表面积为288.21m2g-1。将20mg制备好的二氧化钛粉末和80mL体积浓度为20%的甲醇溶液中(64mL去离子水和16mL甲醇)加入反应容器中,反应之前,容器中通半小时的氮气以排除容器中的空气。反应时,容器反应物一直有磁力搅拌器搅拌以保证催化剂均匀分散。一段时间后,取反应器中的气体1mL送入气相色谱仪中检测,将测得峰位的保留时间、峰面积与标准峰的保留时间、峰面积对比,计算后得到光催化制氢的效率为1312μmol﹒h-1﹒g-1。
实施案例4
在室温下,将5ml钛酸异丙酯滴加到3ml的盐酸中,搅拌15min,得到溶液A。1ml 的P123滴加到80ml乙醇中,搅拌15min,得到溶液B。然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C。然后向溶液中加入20ml乙二醇,搅拌5min,得到溶液D。将所得的溶液放入聚四氟乙烯反应釜中150℃反应20h。将水热反应产物离心、洗涤、干燥即得到产品,标记Et8,该产品拉曼图显示为锐钛矿相和TiO2(B)复合结构二氧化钛光催化剂,如图2所示,其锐钛矿含量为43.7%。其比表面积为237.827m2g-1。将20mg制备好的二氧化钛粉末和80mL体积浓度为20%的甲醇溶液中(64mL去离子水和16mL甲醇)加入反应容器中,反应之前,容器中通半小时的氮气以排除容器中的空气。反应时,容器反应物一直有磁力搅拌器搅拌以保证催化剂均匀分散。一段时间后,取反应器中的气体1mL送入气相色谱仪中检测,将测得峰位的保留时间、峰面积与标准峰的保留时间、峰面积对比,计算后得到光催化制氢的效率为447.5μmol﹒h-1﹒g-1。
实施案例5
在室温下,将5ml钛酸异丙酯滴加到3ml的盐酸中,搅拌15min,得到溶液A。1ml 的P123滴加到50ml乙醇中,搅拌15min,得到溶液B。然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C。然后向溶液中加入50ml乙醇,搅拌5min,得到溶液D。将所得的溶液放入聚四氟乙烯反应釜中150℃反应20h。将水热反应产物离心、洗涤、干燥即得到产品,标记Et10,该产品拉曼图显示为锐钛矿相二氧化钛光催化剂,如图2所示。其比表面积为167.63m2g-1。将20mg制备好的二氧化钛粉末和80mL体积浓度为20%的甲醇溶液中(64mL去离子水和16mL甲醇)加入反应容器中,反应之前,容器中通半小时的氮气以排除容器中的空气。反应时,容器反应物一直有磁力搅拌器搅拌以保证催化剂均匀分散。一段时间后,取反应器中的气体1mL送入气相色谱仪中检测,将测得峰位的保留时间、峰面积与标准峰的保留时间、峰面积对比,计算后得到光催化制氢的效率为98μmol﹒h-1﹒g-1。
对比案例1:
原料:商业购买的Douglas P25粉末20mg,XRD分析其锐钛矿在复合相中质量占比为 85.9%。将该粉末20mg和80mL体积浓度为20%的甲醇溶液中(64mL去离子水和16mL甲醇)加入反应容器中,反应之前,容器中会通半小时的氮气以排除容器中的空气。反应时,容器反应物一直有磁力搅拌器搅拌以保证催化剂均匀分散。一段时间后,取反应器中的气体1mL送入气相色谱仪中检测,将测得峰位的保留时间、峰面积与标准峰的保留时间、峰面积对比,计算后得到光催化制氢的效率为30μmol﹒h-1﹒g-1。
Claims (4)
1.一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂,其特征在于:锐钛矿相二氧化钛量子点自组装生长在TiO2(B)二维纳米片表面,锐钛矿量子点尺寸为4-6nm,暴露晶面为{010},TiO2(B)二维纳米片厚度为1-2nm,表面暴露晶面为(100)面,其中锐钛矿量子点在复合相中质量占比为0.1%~43.7%。
2.根据权利要求1所述的一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂,其特征在于:锐钛矿相二氧化钛量子点自组装生长在TiO2(B)二维纳米片表面,锐钛矿量子点尺寸为4-6nm,暴露晶面为{010},TiO2(B)二维纳米片厚度为1-2nm,表面暴露晶面为(100)面,其中锐钛矿量子点在复合相中质量占比为4%~10%。
3.根据权利要求1所述的一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂的制备方法,其特征在于具体制备步骤如下:
(1)在室温下,将5ml 95%的钛酸异丙酯滴加到3ml 37%的盐酸中,搅拌15min,得到溶液A;
(2)1ml的聚氧乙烯-聚氧丙烯-聚氧乙烯(P123)滴加到10~100ml乙醇中,搅拌15min,得到溶液B;
(3)然后将溶液B滴加到溶液A中,再搅拌30min,得到溶液C;
(4)然后向溶液C中加入乙二醇,其体积为100ml减去步骤(2)中所加入的乙醇体积,搅拌5min,得到溶液D;
(5)将所得的溶液D放入聚四氟乙烯反应釜中150℃加热反应20h;
(6)待反应釜自然冷却到室温后,将样品取出,用酒精离心洗涤4次,烘干,研磨,即得到二氧化钛粉末光催化剂。
4.按权利要求3的一种锐钛矿相和TiO2(B)复合纳米二氧化钛的光催化剂的制备方法,其特征在于:当乙醇和乙二醇的体积都为50ml时,水热反应得到的锐钛矿相量子点和TiO2(B)二维纳米片复合二氧化钛纳米光催化剂,锐钛矿量子点在在复合相中质量占比为5.9%,在没有添加任何贵金属助催化剂的情况下,获得比Degussa P25高45倍的产氢性能。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201611157665.9A CN106807344B (zh) | 2016-12-14 | 2016-12-14 | 一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂及其制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201611157665.9A CN106807344B (zh) | 2016-12-14 | 2016-12-14 | 一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂及其制备方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN106807344A CN106807344A (zh) | 2017-06-09 |
CN106807344B true CN106807344B (zh) | 2019-04-12 |
Family
ID=59109646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201611157665.9A Expired - Fee Related CN106807344B (zh) | 2016-12-14 | 2016-12-14 | 一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂及其制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106807344B (zh) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107199038B (zh) * | 2017-07-07 | 2020-03-31 | 湖北大学 | 一种复合光催化剂及其制备方法 |
CN107649107A (zh) * | 2017-09-25 | 2018-02-02 | 兰州大学 | 一种量子点/TiO2复合材料的制备方法及其应用 |
CN108648918B (zh) * | 2018-05-10 | 2020-02-14 | 西北工业大学 | 一种TiO2(B)NWs/TiO2NP染料敏化太阳能电池光阳极及制备方法 |
CN109603793A (zh) * | 2018-12-28 | 2019-04-12 | 上海理工大学 | 单斜相二氧化钛可见光催化剂的制备方法及用途 |
CN111215059B (zh) * | 2020-01-06 | 2022-08-30 | 湖北大学 | 一种金纳米颗粒修饰的二氧化钛(b)纳米片催化剂及其制备方法和应用 |
CN112264093A (zh) * | 2020-10-19 | 2021-01-26 | 浙江大学 | 微波诱导制备聚吡咯修饰TiO2包覆LaB6光解水制氢催化剂方法 |
CN112844489B (zh) * | 2021-02-02 | 2022-05-13 | 湖北大学 | 一种三相异质结光催化剂及其制备方法和应用、复合光催化剂及其制备方法和应用 |
CN113000043B (zh) * | 2021-02-21 | 2022-02-11 | 兰州大学 | 一种二氧化钛量子点表面暴露的晶面结构的调控工艺及其与二维材料构建的复合光催化剂 |
CN114768782A (zh) * | 2022-04-18 | 2022-07-22 | 西安交通大学苏州研究院 | 一种TiO2同质异相结纳米材料及其制备方法与应用 |
CN114700077A (zh) * | 2022-04-24 | 2022-07-05 | 昆明理工大学 | 一种三氧化二铁掺杂双相二氧化钛催化剂的制备方法及其应用 |
CN116272937B (zh) * | 2023-03-28 | 2024-05-03 | 南京大学 | 一种TiO2纳米片材料的制备方法和应用 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100350226B1 (ko) * | 2000-02-29 | 2002-08-27 | 나노케미칼 주식회사 | 저온균일침전법으로 큰 비표면적을 갖도록 제조된 광촉매용 이산화티탄 분말 및 그 제조방법 |
CN102776544B (zh) * | 2012-07-13 | 2015-06-03 | 西南交通大学 | 一种半壁型二氧化钛纳米管阵列的制备工艺 |
-
2016
- 2016-12-14 CN CN201611157665.9A patent/CN106807344B/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN106807344A (zh) | 2017-06-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106807344B (zh) | 一种锐钛矿相和TiO2(B)复合纳米结构二氧化钛光催化剂及其制备方法 | |
Zarezadeh et al. | Fabrication of novel ZnO/BiOBr/C-Dots nanocomposites with considerable photocatalytic performances in removal of organic pollutants under visible light | |
Bafaqeer et al. | Well-designed ZnV2O6/g-C3N4 2D/2D nanosheets heterojunction with faster charges separation via pCN as mediator towards enhanced photocatalytic reduction of CO2 to fuels | |
Meng et al. | Insight into the transfer mechanism of photogenerated carriers for WO3/TiO2 heterojunction photocatalysts: is it the transfer of band–band or Z-scheme? Why? | |
Ijaz et al. | Preparation of CdS@ CeO2 core/shell composite for photocatalytic reduction of CO2 under visible-light irradiation | |
Preethi et al. | Photocatalytic hydrogen production using Fe2O3-based core shell nano particles with ZnS and CdS | |
US10987659B1 (en) | Synthesis of TiO2/Co3O4 core-shell photocatalysts | |
Wang et al. | Photocatalytic reduction of CO2 to methane over PtOx-loaded ultrathin Bi2WO6 nanosheets | |
Yin et al. | Room temperature synthesis of CdS/SrTiO3 nanodots-on-nanocubes for efficient photocatalytic H2 evolution from water | |
Lin et al. | Photocatalytic water splitting for hydrogen production on Au/KTiNbO5 | |
Geng et al. | Fabrication of the SnS2/ZnIn2S4 heterojunction for highly efficient visible light photocatalytic H2 evolution | |
Lyubina et al. | Photocatalytic hydrogen evolution from aqueous solutions of glycerol under visible light irradiation | |
CN109331883A (zh) | 一种CdS/金属有机框架复合光催化材料及其制备方法和应用 | |
Poudyal et al. | Insights into elevated-temperature photocatalytic reduction of CO2 by H2O | |
Liu et al. | Enhancing hydrogen evolution of water splitting under solar spectra using Au/TiO2 heterojunction photocatalysts | |
CN107282077A (zh) | 一种光催化固氮催化剂的制备方法及其应用 | |
Yu et al. | Rational design and fabrication of TiO2 nano heterostructure with multi-junctions for efficient photocatalysis | |
Pirhashemi et al. | Ultrasonic-assisted preparation of novel ternary ZnO/Ag3VO4/Ag2CrO4 nanocomposites and their enhanced visible-light activities in degradation of different pollutants | |
CN108671955A (zh) | 一种光解水产氢复合催化剂及其制备方法 | |
CN108855131A (zh) | 一种银-镍双金属掺杂二氧化钛纳米复合材料的制备和应用 | |
CN107670672A (zh) | 一种钛酸钡复合硫化镉纳米复合光催化剂及其制备方法 | |
KR20230088682A (ko) | 태양광에서 c1-산화제로의 co2+h2o 공동 변환을 위한 연속 공정을 위한 광촉매 장치 | |
CN107827709B (zh) | 一种光催化乙醇转化合成巴豆醇的方法 | |
Mallikarjuna et al. | Synthesis of oxygen-doped-g-C3N4/WO3 porous structures for visible driven photocatalytic H2 production | |
Chen et al. | Wavelength-dependent photoactivity of ZnxCd1− xS and ZnCo2O4/ZnxCd1− xS for H2 and H2O2 production |
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: 20190412 Termination date: 20191214 |
|
CF01 | Termination of patent right due to non-payment of annual fee |