CN113952952A - 一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用 - Google Patents
一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用 Download PDFInfo
- Publication number
- CN113952952A CN113952952A CN202111043350.2A CN202111043350A CN113952952A CN 113952952 A CN113952952 A CN 113952952A CN 202111043350 A CN202111043350 A CN 202111043350A CN 113952952 A CN113952952 A CN 113952952A
- Authority
- CN
- China
- Prior art keywords
- tio
- acid solution
- bacteriostatic
- antibacterial
- preparation
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 55
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 85
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 23
- 230000003385 bacteriostatic effect Effects 0.000 claims abstract description 16
- 230000001699 photocatalysis Effects 0.000 claims abstract description 13
- 241000588724 Escherichia coli Species 0.000 claims abstract description 12
- 239000002127 nanobelt Substances 0.000 claims abstract description 10
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 230000002779 inactivation Effects 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims description 26
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 238000005406 washing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 6
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 claims description 6
- 239000008367 deionised water Substances 0.000 claims description 5
- 229910021641 deionized water Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- 239000011609 ammonium molybdate Substances 0.000 claims description 4
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 claims description 4
- 229940010552 ammonium molybdate Drugs 0.000 claims description 4
- 235000018660 ammonium molybdate Nutrition 0.000 claims description 4
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 4
- 239000002074 nanoribbon Substances 0.000 claims description 4
- 238000001354 calcination Methods 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- 229910001961 silver nitrate Inorganic materials 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 abstract description 10
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000007146 photocatalysis Methods 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 230000009849 deactivation Effects 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 abstract description 2
- 244000052769 pathogen Species 0.000 abstract description 2
- 230000001717 pathogenic effect Effects 0.000 abstract description 2
- 229910001316 Ag alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 239000002114 nanocomposite Substances 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 6
- 238000004659 sterilization and disinfection Methods 0.000 description 6
- 239000010936 titanium Substances 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 5
- 230000001954 sterilising effect Effects 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 4
- 238000000349 field-emission scanning electron micrograph Methods 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006862 quantum yield reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 1
- 239000003242 anti bacterial agent Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000012258 culturing Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 230000000415 inactivating effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000004298 light response Effects 0.000 description 1
- 231100000053 low toxicity Toxicity 0.000 description 1
- 239000002609 medium Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000010956 nickel silver Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 230000033116 oxidation-reduction process Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000002504 physiological saline solution Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002096 quantum dot Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- MHLYOTJKDAAHGI-UHFFFAOYSA-N silver molybdate Chemical compound [Ag+].[Ag+].[O-][Mo]([O-])(=O)=O MHLYOTJKDAAHGI-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/66—Silver or gold
- B01J23/68—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/683—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum or tungsten
- B01J23/686—Silver or gold with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum or tungsten with molybdenum
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N59/00—Biocides, pest repellants or attractants, or plant growth regulators containing elements or inorganic compounds
- A01N59/16—Heavy metals; Compounds thereof
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/088—Radiation using a photocatalyst or photosensitiser
-
- 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
- B01J35/20—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state
- B01J35/23—Catalysts, in general, characterised by their form or physical properties characterised by their non-solid state in a colloidal state
-
- 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
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Zoology (AREA)
- Plant Pathology (AREA)
- Environmental Sciences (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Dentistry (AREA)
- Composite Materials (AREA)
- Wood Science & Technology (AREA)
- Pest Control & Pesticides (AREA)
- Inorganic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Manufacturing & Machinery (AREA)
- Catalysts (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
本发明公开了一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用,属于纳米复合抑菌材料技术领域。本发明的技术方案要点为:以表面粗糙化的TiO2纳米带为基体,通过与窄带隙Ag2Mo2O7半导体复合,制备出一种新型的异质结Ag2Mo2O7/TiO2抑菌材料,该抑菌材料能够用于光催化灭活大肠杆菌。本发明中异质结的形成不仅加快了光生电子和空穴的分离,还有效抑制了Ag2Mo2O7的光腐蚀,提高了异质结的光催化活性和稳定性,同时制得的Ag2Mo2O7/TiO2作为一种有效的抑菌材料有望在致病菌灭活中得到推广应用。
Description
技术领域
本发明属于纳米抑菌复合材料技术领域,具体涉及一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用。
背景技术
在众多半导体光催化材料中,二氧化钛(TiO2)因其无毒、廉价、稳定性高、氧化还原性强等优点,被广泛应用于光催化杀菌领域。但TiO2禁带宽度大(3.2eV),只能吸收紫外光,而且量子产率较低,极大的限制了它的实际应用。而将其与窄带系半导体复合可以提高材料对可见光的吸收能力,促进广生电荷有效分离,是提高TiO2光催化活性的有效途径之一。
银系半导体因其吸光能力强、量子产率高、光催化活性好等特点受到人们的广泛关注。Ag+具有4d 10电子轨道,其可以参与半导体的能带构建,使银系半导体带隙变窄并表现出可见光响应能力。同时,由于银系半导体的光生空穴和电子的有效质量较小,有利于光生电荷的快速迁移。因此,银系半导体具有良好的可见光响应性能和较快的光生电荷迁移速率,广泛应用于光催化消毒杀菌领域。将TiO2和银系半导体的优势相结合,不仅可以拓展TiO2对可见光的吸光范围,提高可见光利用率,还可以促进光生电子和空穴的分离,提高材料的光催化抑菌活性。
钼酸银(Ag2Mo2O7)是一种新兴的银系半导体光催化材料,其价带顶由Ag 4d 和O2p轨道杂化构成,杂化轨道的存在降低了Ag2Mo2O7的带隙能。Ag2Mo2O7单斜晶系和三斜晶系的带隙能分别为2.98eV和2.65eV,均可以吸收可见光,且其化学活性较高,最近常被应用于废水净化领域。此外,Ag2Mo2O7作为一种新型无机抗菌剂,具有广谱抗菌性,备受人们关注。但是Ag2Mo2O7也存在缺点,如吸光范围较窄,且容易发生光腐蚀生成Ag单质,而Ag单质可能会占据Ag2Mo2O7的活性位点,从而降低Ag2Mo2O7的光催化活性。
发明内容
为了解决上述技术问题,本发明提供了一种Ag2Mo2O7/TiO2抑菌材料及其制备方法,该方法以表面粗糙化的TiO2纳米带为基体,通过与窄带隙Ag2Mo2O7半导体复合,制备出一种新型的异质结Ag2Mo2O7/TiO2抑菌材料,该抑菌材料能够用于光催化灭活大肠杆菌。
本发明为解决上述技术问题采用如下技术方案,一种Ag2Mo2O7/TiO2抑菌材料的制备方法,其特征在于具体步骤为:
步骤S1:将P25分散到NaOH溶液中,于180ºC水热反应48h后冷却至室温,用去离子水洗涤至中性,再将其分散在盐酸溶液中搅拌24h,将盐酸溶液处理过的材料加入到强酸溶液中,搅拌并于100oC反应12h,水洗至中性,于70oC烘干,然后在马弗炉中以5℃/min的升温速率升温至500℃煅烧2h后自然冷却至室温,得到白色产物即为表面粗糙的TiO2纳米带;
步骤S2:将步骤S1得到的TiO2纳米带分散到钼酸铵溶液中,搅拌,再加入硝酸银溶液,调节混合体系的pH值为6,继续搅拌2h,所得悬浊液转移至反应釜中,于150ºC反应12h,冷却至室温,经离心、洗涤、干燥后得到Ag2Mo2O7/TiO2抑菌材料。
作为本发明进一步的改进,步骤S1中所述盐酸溶液的浓度为0.1M。
作为本发明进一步的改进,步骤S1中所述强酸溶液为0.02M的硫酸溶液。
本发明还提供了一种由上述制备方法所制备的Ag2Mo2O7/TiO2抑菌材料,该抑菌材料充分利用了TiO2和Ag2Mo2O7的优点,具有极佳的协同抗菌作用,同时,由于TiO2和Ag2Mo2O7之间形成了异质结,促进了广生电子-空穴对的分离,极大抑制了Ag2Mo2O7的光腐蚀,提高了异质结材料的稳定性。因此,Ag2Mo2O7/TiO2作为一种有效的抑菌材料有望在致病菌灭活中得到推广应用。
作为本发明进一步的改进,所述的Ag2Mo2O7/TiO2抑菌材料在光催化灭活大肠杆菌中的应用。
本发明具有以下优点和有益效果:本发明制得的Ag2Mo2O7/TiO2抑菌材料中的TiO2纳米带表面由大小约为20nm的颗粒构成,粗糙的表面提高了TiO2的比表面积,为反应提供更多的活性位点。同时,在制备Ag2Mo2O7/TiO2抑菌材料的过程中,表面粗糙化的TiO2纳米带为反应提供了更多的成核中心,使Ag+均匀分布在TiO2表面,导致Ag2Mo2O7以纳米颗粒的形式均匀紧密生长在TiO2纳米带表面,形成了Ag2Mo2O7/TiO2异质结。异质结的形成不仅加快了光生电子和空穴的分离,还有效抑制了Ag2Mo2O7的光腐蚀,提高了异质结的光催化活性和稳定性。
附图说明
图1是本发明实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的FESEM图;
图2是本发明实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的XPS图;
图3是本发明实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的XRD图谱;
图4是本发明实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的紫外-可见漫反射光谱图;
图5是本发明实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的光电流及EIS曲线图;
图6是本发明实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2(40μg/mL)对大肠杆菌(1.6×107 cfu/mL)的灭活效果:(a)黑暗条件、(b)光照条件;
图7是本发明实施例制得的Ag2Mo2O7/TiO2(40 μg/mL)处理的大肠杆菌的FESEM图:(a)0min、(b)5min、(c)15min、(d)30min、(e)45min、(f)60min。
具体实施方式
以下通过实施例对本发明的上述内容做进一步详细说明,但不应该将此理解为本发明上述主题的范围仅限于以下的实施例,凡基于本发明上述内容实现的技术均属于本发明的范围。
实施例
Ag2Mo2O7/TiO2抑菌材料的制备:
将0.8g P25分散到80mL的NaOH溶液中(10M),搅拌1h,随后转移至100mL反应釜中,于180ºC保持48h,冷却至室温,用去离子水洗涤至中性,将其分散到盐酸溶液(0.1 M)中,连续搅拌24h。然后将材料转移至80mL的 H2SO4溶液(0.02M)中,继续搅拌,将上述材料转移至反应釜中,于100oC保持12h,用去离子水洗至中性,于70oC烘干,然后在马弗炉中于600ºC煅烧2h(升温速率为5ºC/min)后自然冷却至室温,得到白色产物即为表面粗糙的TiO2纳米带。
将浓度为27.22mg/mL的钼酸铵溶液(250μL)加入到蒸馏水(60mL)中,搅拌30min后加入0.1g上述制备的TiO2纳米带,继续搅拌1h,使钼酸铵均匀分散在TiO2纳米带表面,再加入250μL浓度为26.19mg/mL的硝酸银溶液,调节混合体系的pH值(pH=6),继续搅拌2h,随后转移上述液体至反应釜中,于150ºC保持12h,冷却至室温,用去离子水洗涤,干燥后得到Ag2Mo2O7/TiO2抑菌材料。纯Ag2Mo2O7在不加TiO2的条件下制备。
Ag2Mo2O7/TiO2抑菌材料的表征:
图1是本实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的FESEM图。由图可以看出TiO2呈带状结构,表面粗糙,可以为反应提供更多的活性位点。纯Ag2Mo2O7为棒状结构,宽度为1-3μm。Ag2Mo2O7/TiO2抑菌材料中没有观察到Ag2Mo2O7的棒状结构,这是因为TiO2纳米带表面的颗粒为反应提供了更多的反应位点,使Ag+均匀分布在TiO2表面,导致Ag2Mo2O7以纳米颗粒的形式均匀紧密生长在TiO2纳米带表面。
图2是本实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的XPS图谱。由图2a可知,Ag2Mo2O7/TiO2抑菌材料中Ti 2p3/2和Ti 2p1/2结合能的位置分别为458.6eV和464.3eV,比纯TiO2中Ti4+的Ti 2p3/2和Ti 2p1/2低,表明Ag2Mo2O7和TiO2之间形成了异质结。纯TiO2中晶格氧和表面吸附的-OH的结合能分别为530.0eV和531.3eV,Ag2Mo2O7中O 1s的结合能分别为530.3eV和531.5eV,而Ag2Mo2O7/TiO2抑菌材料中O 1s的结合能均低于纯TiO2和Ag2Mo2O7,进一步说明Ag2Mo2O7和TiO2之间形成了异质结(图2b)。由图2c-d可知,与纯Ag2Mo2O7相比,Ag2Mo2O7/TiO2抑菌材料中Mo 3d的结合能均低于纯Ag2Mo2O7,而Ag+的Ag3d5/2和Ag3d3/2的结合能高于纯Ag2Mo2O7。Ti、O、Ag和Mo四种元素的结合能同时发生位移,表明TiO2和Ag2Mo2O7之间存在相互作用,形成了异质结。
图3是本实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的XRD图谱。图中纯TiO2的衍射峰位置分别为25.28°、37.80°和48.05°,分别对应(101)、(004)和(200)晶面,与锐钛矿TiO2(JCPDS No.78-2486)完全吻合。纯Ag2Mo2O7衍射峰位置分别为14.00°、23.52°、28.31°、32.51°及32.90°(JCPDS No.75-1505)。在Ag2Mo2O7/TiO2样品中明显观察到了TiO2的衍射峰,但没有观察到Ag2Mo2O7的特征峰,这可能是因为Ag2Mo2O7含量较少所致。
图4为本实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的UV-vis图谱。由图可知,纯TiO2的吸收带边约为400nm,只能吸收紫外光。Ag2Mo2O7的吸收带边约为490nm。与纯TiO2相比,Ag2Mo2O7/TiO2抑菌材料的吸收带边明显红移,表明其光响应范围比TiO2宽。
图5为本实施例制得的TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2的光电流响应曲线和交流阻抗图(EIS)。由图6a可知,Ag2Mo2O7/TiO2抑菌材料的光电流信号明显强于纯TiO2和Ag2Mo2O7,AMT-10的光电流信号最强,表明Ag2Mo2O7/TiO2抑菌材料的电荷分离性能最好。由图6b可知,Ag2Mo2O7/TiO2抑菌材料的交流阻抗曲线的弧半径最小,表明其电荷转移的阻抗最小,电荷分离度最高。
抑菌试验:
具体灭菌过程如下:将50μL Ag2Mo2O7/TiO2抑菌材料分散液(4mg/mL)加入到1.6×106cfu/mL细菌悬液中(10mL),以300W氙灯为光源进行照射,光源灯头加有AM1.5G滤光片。每30min取样500μL,用0.85wt%的生理盐水将其稀释。然后取1mL稀释后的液体加入到培养平板内,倒入10-13mL固体培养基,转移至恒温培养箱中,在37ºC下培养24h。计数在不同情况下形成的菌落数。灭菌实验均进行三次平行实验,最终实验数据取三次实验数据的平均值。
图6是TiO2、Ag2Mo2O7和Ag2Mo2O7/TiO2对大肠杆菌的灭活效果图。由图6a可以看出,黑暗条件下,所制备材料对细菌灭活效果不明显,表明Ag2Mo2O7/TiO2抑菌材料本身对大肠杆菌细胞毒性较小。模拟太阳光条件下(图6b),光照60分钟时TiO2和Ag2Mo2O7体系中活细胞的数量分别为6.5log和6.7log,而Ag2Mo2O7/TiO2抑菌材料可以将大肠杆菌完全灭活,表明Ag2Mo2O7/TiO2抑菌材料具有较高的光催化灭菌活性。这可能是由于Ag2Mo2O7和TiO2之间形成了异质结,促进了光生电荷的有效分离。
图7是经Ag2Mo2O7/TiO2处理的大肠杆菌的FESEM图。未经光照处理的大肠杆菌表面光滑,长约1-2μm,结构完整(图7a)。光照5分钟后,细菌表面有凹坑出现(图7a),表明大肠杆菌的细胞壁和细胞膜开始被体系中的活性物种氧化。随着光照时间延长,细胞变形严重(图7c-e),光照60分钟时,大肠杆菌细胞完全变形(图7f)。
本领域的技术人员在不脱离权利要求书确定的本发明的精神和范围的条件下,还可以对以上内容进行各种各样的修改。因此本发明的范围并不仅限于以上的说明,而是由权利要求书的范围来确定的。
Claims (5)
1.一种Ag2Mo2O7/TiO2抑菌材料的制备方法,其特征在于具体步骤为:
步骤S1:将P25分散到NaOH溶液中,于180ºC水热反应48h后冷却至室温,用去离子水洗涤至中性,再将其分散在盐酸溶液中搅拌24h,将盐酸溶液处理过的材料加入到强酸溶液中,搅拌并于100oC反应12h,水洗至中性,于70oC烘干,然后在马弗炉中以5℃/min的升温速率升温至500℃煅烧2h后自然冷却至室温,得到白色产物即为表面粗糙的TiO2纳米带;
步骤S2:将步骤S1得到的TiO2纳米带分散到钼酸铵溶液中,搅拌,再加入硝酸银溶液,调节混合体系的pH值为6,继续搅拌2h,所得悬浊液转移至反应釜中,于150ºC反应12h,冷却至室温,经离心、洗涤、干燥后得到Ag2Mo2O7/TiO2抑菌材料。
2.根据权利要求1所述的Ag2Mo2O7/TiO2抑菌材料的制备方法,其特征在于:步骤S1中所述盐酸溶液的浓度为0.1M。
3.根据权利要求1所述的Ag2Mo2O7/TiO2抑菌材料的制备方法,其特征在于:步骤S1中所述强酸溶液为0.02M的硫酸溶液。
4.一种由权利要求1-3中任意一项所述的方法所制备的Ag2Mo2O7/TiO2抑菌材料,该Ag2Mo2O7/TiO2抑菌材料中TiO2和Ag2Mo2O7之间形成了异质结,促进了广生电子-空穴对的分离,极大抑制了Ag2Mo2O7的光腐蚀,提高了异质结材料的稳定性。
5.权利要求4所述的Ag2Mo2O7/TiO2抑菌材料在光催化灭活大肠杆菌中的应用。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111043350.2A CN113952952B (zh) | 2021-09-07 | 2021-09-07 | 一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202111043350.2A CN113952952B (zh) | 2021-09-07 | 2021-09-07 | 一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN113952952A true CN113952952A (zh) | 2022-01-21 |
CN113952952B CN113952952B (zh) | 2024-01-19 |
Family
ID=79461011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202111043350.2A Active CN113952952B (zh) | 2021-09-07 | 2021-09-07 | 一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN113952952B (zh) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116272985A (zh) * | 2023-03-09 | 2023-06-23 | 上海腾灵建设集团有限公司 | 钼酸银@钛@网络状二氧化钛的制备方法及产品和应用 |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102974375A (zh) * | 2012-11-28 | 2013-03-20 | 江苏大学 | 一种异质结构多功能复合材料及其制备方法 |
US20170066929A1 (en) * | 2014-05-22 | 2017-03-09 | Fujifilm Corporation | Instrument, protective sheet, and antibacterial film |
CN106492854A (zh) * | 2016-11-16 | 2017-03-15 | 陕西科技大学 | 利用两步法制备具有光催化性能的复合型纳米Ag3PO4/TiO2材料及方法和应用 |
CN108579775A (zh) * | 2018-05-15 | 2018-09-28 | 浙江大学城市学院 | 一种磷酸银/银/二氧化钛纳米花复合材料及其制备方法与应用 |
CN111450902A (zh) * | 2020-05-11 | 2020-07-28 | 上海纳米技术及应用国家工程研究中心有限公司 | 抗菌型钼酸银/MIL-101(Fe,Zn)异质结光催化膜的制备方法及其产品和应用 |
US20200267990A1 (en) * | 2017-09-15 | 2020-08-27 | Hecosol Gmbh | Anti-microbial coating |
CN112079410A (zh) * | 2020-09-24 | 2020-12-15 | 泰州九润环保科技有限公司 | 一种Ag/Ag2Mo2O7/WS2异质结光催化材料在降解有机污染物中的应用 |
CN112121825A (zh) * | 2020-09-24 | 2020-12-25 | 泰州九润环保科技有限公司 | 一种Ag/Ag2Mo2O7/WS2异质结光催化材料及其制备方法 |
-
2021
- 2021-09-07 CN CN202111043350.2A patent/CN113952952B/zh active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102974375A (zh) * | 2012-11-28 | 2013-03-20 | 江苏大学 | 一种异质结构多功能复合材料及其制备方法 |
US20170066929A1 (en) * | 2014-05-22 | 2017-03-09 | Fujifilm Corporation | Instrument, protective sheet, and antibacterial film |
CN106492854A (zh) * | 2016-11-16 | 2017-03-15 | 陕西科技大学 | 利用两步法制备具有光催化性能的复合型纳米Ag3PO4/TiO2材料及方法和应用 |
US20200267990A1 (en) * | 2017-09-15 | 2020-08-27 | Hecosol Gmbh | Anti-microbial coating |
CN108579775A (zh) * | 2018-05-15 | 2018-09-28 | 浙江大学城市学院 | 一种磷酸银/银/二氧化钛纳米花复合材料及其制备方法与应用 |
CN111450902A (zh) * | 2020-05-11 | 2020-07-28 | 上海纳米技术及应用国家工程研究中心有限公司 | 抗菌型钼酸银/MIL-101(Fe,Zn)异质结光催化膜的制备方法及其产品和应用 |
CN112079410A (zh) * | 2020-09-24 | 2020-12-15 | 泰州九润环保科技有限公司 | 一种Ag/Ag2Mo2O7/WS2异质结光催化材料在降解有机污染物中的应用 |
CN112121825A (zh) * | 2020-09-24 | 2020-12-25 | 泰州九润环保科技有限公司 | 一种Ag/Ag2Mo2O7/WS2异质结光催化材料及其制备方法 |
Non-Patent Citations (2)
Title |
---|
HUIHUI XU等: "The effective photocatalysis and antibacterial properties of AgBr/Ag2MoO4@ZnO composites under visible light irradiation", 《BIOFOULING》, vol. 35, no. 7, pages 719 - 731 * |
丁雨阳;刘振东;马臻;: "Ag_3VO_4/Ag_2Mo_2O_7复合光催化剂", 复旦学报(自然科学版), no. 05, pages 112 - 120 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN116272985A (zh) * | 2023-03-09 | 2023-06-23 | 上海腾灵建设集团有限公司 | 钼酸银@钛@网络状二氧化钛的制备方法及产品和应用 |
CN116272985B (zh) * | 2023-03-09 | 2023-11-14 | 上海腾灵建设集团有限公司 | 钼酸银@钛@网络状二氧化钛的制备方法及产品和应用 |
Also Published As
Publication number | Publication date |
---|---|
CN113952952B (zh) | 2024-01-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Wang et al. | Advances in photocatalytic disinfection of bacteria: development of photocatalysts and mechanisms | |
Ran et al. | Immobilizing CuO/BiVO4 nanocomposite on PDA-templated cotton fabric for visible light photocatalysis, antimicrobial activity and UV protection | |
Srinivasan et al. | Bactericidal and detoxification effects of irradiated semiconductor catalyst, TiO 2 | |
Samsudin et al. | Photocatalytic degradation of real industrial poultry wastewater via platinum decorated BiVO4/g-C3N4 photocatalyst under solar light irradiation | |
Ilinoiu et al. | Photocatalytic activity of a nitrogen-doped TiO2 modified zeolite in the degradation of Reactive Yellow 125 azo dye | |
CN106423224B (zh) | 一种BiVO4/BiOI异质结复合光催化剂及其制备方法和应用 | |
Yan et al. | Efficient photocatalytic disinfection of Escherichia coli by N-doped TiO2 coated on coal fly ash cenospheres | |
Nie et al. | Synthesis and characterization of N-doped carbonaceous/TiO2 composite photoanodes for visible-light photoelectrocatalytic inactivation of Escherichia coli K-12 | |
Zhang et al. | Extensive solar light utilizing by ternary C-dots/Cu2O/SrTiO3: Highly enhanced photocatalytic degradation of antibiotics and inactivation of E. coli | |
CN111686770B (zh) | 一种金属离子共掺杂BiOBr微球、制备方法及其应用 | |
CN105126919B (zh) | 一种复合型可见光催化剂及其制备方法与应用 | |
CN112774664A (zh) | 一种具有光热协同作用纳米TiO2@MnO2复合材料及其制备方法和应用 | |
CN113952952B (zh) | 一种Ag2Mo2O7/TiO2抑菌材料及其制备方法和应用 | |
CN103721713B (zh) | 一种高效降解染料的三相复合可见光催化剂 | |
CN111744503A (zh) | 一种Z型异质结MoS2/Bi2WO6复合光催化剂及其制备方法和应用 | |
CN106824233A (zh) | 光催化抗菌或降解有机物的方法 | |
CN113769762A (zh) | 一种超薄ZnIn2S4纳米片光触媒材料及其制备方法和应用 | |
CN110605138A (zh) | 一种钽氧氮/泡沫镍光催化接触氧化膜的制备方法和应用 | |
Li et al. | Efficient bacterial inactivation with S-doped g-C3N4 nanosheets under visible light irradiation | |
CN113578349A (zh) | 一种2d/1d异质结光催化剂的制备方法及其在抗菌中的应用 | |
CN112375804B (zh) | 一种Au/g-C3N4全天候光催化抗菌材料及其明-暗双模式抗菌机理 | |
KR20110093108A (ko) | 하이브리드 광촉매 표면처리제의 제조방법 및 이에 의해 제조된 하이브리드 광촉매 | |
CN110624574B (zh) | 一种双Bi4O5I2光催化材料的制备方法及其降解MC-LR的应用 | |
CN111686769A (zh) | 一种光催化剂及其制备方法和应用 | |
AU2021105539A4 (en) | Preparation Method, Product and Application of Graphene Photocatalyst |
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 |