CN108786873A - 一种MoS2/Ag2CO3异质结光催化材料的合成及应用 - Google Patents
一种MoS2/Ag2CO3异质结光催化材料的合成及应用 Download PDFInfo
- Publication number
- CN108786873A CN108786873A CN201810731342.9A CN201810731342A CN108786873A CN 108786873 A CN108786873 A CN 108786873A CN 201810731342 A CN201810731342 A CN 201810731342A CN 108786873 A CN108786873 A CN 108786873A
- Authority
- CN
- China
- Prior art keywords
- mos
- water
- photocatalysis material
- heterojunction photocatalysis
- hours
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 51
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 49
- 229910052982 molybdenum disulfide Inorganic materials 0.000 title claims abstract description 48
- 229910052961 molybdenite Inorganic materials 0.000 title claims abstract description 47
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 43
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 238000003786 synthesis reaction Methods 0.000 title abstract description 8
- 230000015572 biosynthetic process Effects 0.000 title abstract description 6
- LKZMBDSASOBTPN-UHFFFAOYSA-L silver carbonate Substances [Ag].[O-]C([O-])=O LKZMBDSASOBTPN-UHFFFAOYSA-L 0.000 claims abstract description 61
- KQTXIZHBFFWWFW-UHFFFAOYSA-L silver(I) carbonate Inorganic materials [Ag]OC(=O)O[Ag] KQTXIZHBFFWWFW-UHFFFAOYSA-L 0.000 claims abstract description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000725 suspension Substances 0.000 claims abstract description 14
- 238000001291 vacuum drying Methods 0.000 claims abstract description 12
- 235000019441 ethanol Nutrition 0.000 claims abstract description 7
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L sodium carbonate Substances [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims abstract description 6
- 230000015556 catabolic process Effects 0.000 claims description 10
- 238000006731 degradation reaction Methods 0.000 claims description 10
- 241000233855 Orchidaceae Species 0.000 claims description 8
- WIKQEUJFZPCFNJ-UHFFFAOYSA-N carbonic acid;silver Chemical compound [Ag].[Ag].OC(O)=O WIKQEUJFZPCFNJ-UHFFFAOYSA-N 0.000 claims description 7
- 241000588724 Escherichia coli Species 0.000 claims description 6
- 244000000010 microbial pathogen Species 0.000 claims description 5
- 239000000975 dye Substances 0.000 claims description 3
- 230000036541 health Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000010189 synthetic method Methods 0.000 claims description 3
- 239000003651 drinking water Substances 0.000 claims description 2
- 235000020188 drinking water Nutrition 0.000 claims description 2
- 230000007613 environmental effect Effects 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 5
- 230000003385 bacteriostatic effect Effects 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 10
- 238000005286 illumination Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000000445 field-emission scanning electron microscopy Methods 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000002957 persistent organic pollutant Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
- 238000005215 recombination Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 description 1
- 241000894006 Bacteria Species 0.000 description 1
- 206010067482 No adverse event Diseases 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000001408 fungistatic effect Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 238000013033 photocatalytic degradation reaction Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000161 silver phosphate Inorganic materials 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- -1 transition metal molybdenum disulfide Chemical class 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000003911 water pollution 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
- B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
- B01J27/20—Carbon compounds
- B01J27/232—Carbonates
-
- 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
- B01J35/19—Catalysts containing parts with different compositions
-
- 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
- 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
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/03—Precipitation; Co-precipitation
- B01J37/031—Precipitation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/14—Treatment of water in water supply networks, e.g. to prevent bacterial growth
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Catalysts (AREA)
Abstract
本发明公开了MoS2/Ag2CO3异质结光催化材料的合成及应用,将花球状MoS2分散于水中并加入Ag(NO)3超声分散均匀形成悬浊液A;将Na2CO3溶于水中并搅拌均匀形成溶液B;将溶液B滴加到悬浊液A中并搅拌混合均匀形成混合液C,其中MoS2与Ag2CO3的质量比为0.05:1,将混合液C搅拌4小时后室温避光静置12小时,离心分离,用水和乙醇分别反复洗涤,再置于真空干燥箱中于60℃真空干燥12h得到由纳米棒和纳米片交错堆积成的粒径为0.5‑2μm的MoS2/Ag2CO3异质结光催化材料。本发明合成的MoS2/Ag2CO3异质结光催化材料表现出较高的可见光催化活性和稳定性,并具有一定的抑菌活性。
Description
技术领域
本发明属于复合光催化材料的合成技术领域,具体涉及一种MoS2/Ag2CO3异质结光催化材料的原位沉淀法合成及应用。
背景技术
近些年,随着社会的不断发展,环境污染已成为全球关注的问题。 一系列问题(如水污染和空气污染)不仅破坏了自然的平衡,而且威胁到人类的健康,所以寻求一些高效和低成本的技术手段是迫切的。 光催化降解是一种颇具吸引力的绿色化学技术,在废水处理领域得到了广泛的研究,该技术能够很有效的降解污染物和抑制致病细菌生长;并且大部分光催化材料具有无污染、低成本、降解效率高和多次循环使用等优点,在环境和能源等各个领域成为研究的热点。然而研究表明,单组分的光催化材料对光的利用效率低并且光生电子-空穴复合几率高,影响了其光催化活性,而异质结材料是通过两种不同的半导体复合构建的材料,能够有效提高材料的光利用效率,降低光生电子-空穴的复合机率,从而提高材料的光催化活性。因此本发明通过合成异质结结构来提高光催化材料的催化性能。
在半导体光催化材料中,银系光催化材料如AgO、AgX(X=Cl、Br、I)、Ag3PO4、Ag2MO4(M=Mo、W、Cr)和AgSbO3,具有良好的光催化性能,引起了广大科技工作者的浓厚兴趣。其中Ag2CO3由于其优异的可见光光催化活性,有效用于降解有机污染物和抑制致病微生物生长,从而引起更多关注。 然而,由于Ag2CO3的光腐蚀性导致其表现出较差的光催化稳定性,因此,Ag2CO3的光催化性能也受到限制。为了有效提高Ag2CO3的稳定性和光催化性能,研究人员提出了Ag2CO3/TiO2和GO/Ag2CO3异质结等半导体结构。通过构建异质结构对Ag2CO3进行改性已被证明是一种有效抑制光生电子-空穴复合和光腐蚀的成功方案,因为Ag2CO3与半导体的复合可加速转移光生载流子,进而提高其光催化活性和稳定性。二维纳米材料是一类新兴的纳米材料类别,其具有片状结构, 水平尺寸超过100nm或几个微米甚至更大,但是厚度只有单个或几个原子厚。因此二维材料表现出了独特的物理、电子和化学特性,引起了研究人员极大的兴趣。作为低成本的层状过渡金属二硫化钼(MoS2),由于其具有较高的载流子迁移率、合适带隙(1.8eV)、较宽的光谱响应范围、等优势,有利于光催化反应并显示出优异的还原能力,同时极其优异的稳定性和长期耐用性而被认为是理想的半导体材料。
本发明通过简便且高效的原位沉淀法合成了一种MoS2/Ag2CO3异质结光催化材料,通过构建异质结促进电子-空穴高效分离,抑制光腐蚀,从而提高催化剂的光催化效率和稳定性。目前尚没有关于合成MoS2/Ag2CO3异质结光催化材料以提高其光催化性能的相关报道。
发明内容
本发明解决的技术问题是提供了一种MoS2/Ag2CO3异质结光催化材料的合成方法及应用,该方法合成的MoS2/Ag2CO3异质结光催化材料表现出较高的可见光催化活性和稳定性,并具有一定的抑菌活性。
本发明为解决上述技术问题采用如下技术方案,一种MoS2/Ag2CO3异质结光催化材料的合成方法,其特征在于具体步骤为:
步骤S1:将花球状MoS2分散于水中并加入Ag(NO)3超声分散均匀形成悬浊液A;
步骤S2:将Na2CO3溶于水中并搅拌均匀形成溶液B;
步骤S3:将溶液B滴加到悬浊液A中并搅拌混合均匀形成混合液C,其中MoS2与Ag2CO3的质量比为0.05:1,将混合液C搅拌4小时后室温避光静置12小时,离心分离,用水和乙醇分别反复洗涤,再置于真空干燥箱中于60℃真空干燥12h得到由纳米棒和纳米片交错堆积成的粒径为0.5-2μm的MoS2/Ag2CO3异质结光催化材料。
本发明制得的MoS2/Ag2CO3异质结光催化材料在降解水体有机污染物和抑制水体致病微生物中的应用,对保护环境以及保证饮用水的安全和人体的健康具有重要意义。
优选的,所述有机污染物为有机染料兰纳素5B,所述致病微生物为大肠杆菌。
本发明采用原位合成法合成MoS2/Ag2CO3异质结光催化材料具有接触良好的界面,较大的比表面积,表现出较高的光催化性能,本发明合成过程无需加入任何模板剂和其它添加剂,合成工艺简易,绿色环保,适宜规模化生产,有望产生良好的社会和经济效益。
附图说明
图1为实施例1制得的MoS2/Ag2CO3异质结光催化材料的FESEM图;
图2为纯MoS2、纯Ag2CO3和实施例1制得的MoS2/Ag2CO3异质结光催化材料的XRD图谱;
图3为纯MoS2、纯Ag2CO3和实施例1制得的MoS2/Ag2CO3异质结光催化材料的UV-Vis DRS图谱;
图4为纯MoS2、纯Ag2CO3和实施例1制得的MoS2/Ag2CO3异质结光催化材料的PL图谱;
图5为不同光催化材料在可见光照射下对兰纳素5B的降解效率对比图;
图6为不同光催化材料在可见光照射下对大肠杆菌的抑制效率对比图。
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1
步骤S1:将花球状MoS2分散于水中并加入Ag(NO)3超声分散均匀形成悬浊液A;
步骤S2:将Na2CO3溶于水中并搅拌均匀形成溶液B;
步骤S3:将溶液B滴加到悬浊液A中并搅拌混合均匀形成混合液C,其中MoS2与Ag2CO3的质量比为0.05:1,将混合液C搅拌4小时后室温避光静置12小时,离心分离,用水和乙醇分别反复洗涤,再置于真空干燥箱中于60℃真空干燥12h得到MoS2/Ag2CO3异质结光催化材料,标记为MA-5复合材料。
图1为实施例1制得的MoS2/Ag2CO3异质结光催化材料的FESEM图。由图可以看出样品由棒状结构的Ag2CO3和MoS2纳米片堆积而成,Ag2CO3直径约为0.5-2.5μm,MoS2直径约为0.4-1μm。
图2为纯MoS2、纯Ag2CO3和实施例1制得的MoS2/Ag2CO3异质结光催化材料的XRD图谱。图中纯MoS2和纯Ag2CO3各衍射的位置分别与六方相MoS2标准卡片(JCPDS NO.37-1492)和单斜相Ag2CO3标准卡片(JCPDS 26-0339)一致。MoS2/Ag2CO3异质结光催化材料基本与纯Ag2CO3的衍射峰保持一致,MoS2的特征峰没有显示可能是由于MoS2较低的含量与强度,在EDS和XPS中可以进一步证明MoS2的存在。
图3为纯MoS2、纯Ag2CO3和实施例1制得的MoS2/Ag2CO3异质结光催化材料的UV-VisDRS图谱。由图可知纯Ag2CO3的吸收带边约为520nm,MoS2/Ag2CO3异质结光催化材料的吸收带边约为580nm,明显发生红移,能更好吸收利用可见光,显著提高了MoS2/Ag2CO3异质结的光催化活性。
实施例2
步骤S1:将花球状MoS2分散于水中并加入Ag(NO)3超声分散均匀形成悬浊液A;
步骤S2:将Na2CO3溶于水中并搅拌均匀形成溶液B;
步骤S3:将溶液B滴加到悬浊液A中并搅拌混合均匀形成混合液C,其中MoS2与Ag2CO3的质量比为0.01:1,将混合液C搅拌4小时后室温避光静置12小时,离心分离,用水和乙醇分别反复洗涤,再置于真空干燥箱中于60℃真空干燥12h得到MoS2/Ag2CO3异质结光催化材料,标记为MA-1复合材料。
实施例3
步骤S1:将花球状MoS2分散于水中并加入Ag(NO)3超声分散均匀形成悬浊液A;
步骤S2:将Na2CO3溶于水中并搅拌均匀形成溶液B;
步骤S3:将溶液B滴加到悬浊液A中并搅拌混合均匀形成混合液C,其中MoS2与Ag2CO3的质量比为0.03:1,将混合液C搅拌4小时后室温避光静置12小时,离心分离,用水和乙醇分别反复洗涤,再置于真空干燥箱中于60℃真空干燥12h得到MoS2/Ag2CO3异质结光催化材料,标记为MA-3复合材料。
实施例4
步骤S1:将花球状MoS2分散于水中并加入Ag(NO)3超声分散均匀形成悬浊液A;
步骤S2:将Na2CO3溶于水中并搅拌混合均匀形成溶液B;
步骤S3:将溶液B滴加到悬浊液A中并搅拌混合均匀形成混合液C,其中MoS2与Ag2CO3的质量比为0.1:1,将混合液C搅拌4小时后室温避光静置12小时,离心分离,用水和乙醇分别反复洗涤,再置于真空干燥箱中于60℃真空干燥12h得到MoS2/Ag2CO3异质结光催化材料,标记为MA-10复合材料。
图4为纯Ag2CO3和实施例1-4制得的含有不同比例MoS2的MoS2/Ag2CO3异质结光催化材料的PL图谱。由图可知MA-5复合材料的荧光强度明显较低,说明MA-5复合材料中光生电子与空穴的复合几率比纯MoS2和Ag2CO3低,表明光生载流子的分离效率比较高,近一步说明MA-5复合材料的光催化活性有显著提高。
实施例5
以有机染料兰纳素5B(LR5B)为降解目标物来评价样品的光催化效果。本实验使用500W氙灯,采用420nm滤光片滤去紫外光,可见光作为光源,采用40mg/L的LR5B为降解浓度;将40mg MoS2/Ag2CO3异质结光催化材料均匀分散在盛有40mL质量浓度为40mg/L的兰纳素5B水溶液的石英试管中,置于黑暗环境中30min达到吸附-脱附平衡。打开光源,光照之后每隔一定时间取4mL样品,经离心分离后取上层清液,用紫外可见分光光度计测定兰纳素5B的浓度变化,从而评价样品的可见光光催化性能。
图5为不同光催化材料在可见光照射下对兰纳素5B的降解效率对比图。由图可以看出,MA-5复合材料对兰纳素5B的降解效率高于纯Ag2CO3和MoS2,经过10min光降解,溶液中兰纳素5B的降解率为96%。随着MoS2含量的增加,光催化活性先增大后减小,说明MoS2的用量对材料的光催化活性起着重要的作用。
实施例6
以大肠杆菌(ATCC25922)为抑制目标物来评价样品的抑菌效果。本实验使用500W氙灯,采用420nm滤光片滤去紫外光,可见光作为光源,菌体浓度约为107cfu/mL,光催化材料浓度为10mg/L,为了定量测试,光照后每隔20分钟取1mL溶液,为了确保菌落的生长是可辨认的,取0.1mL处理过的加入到LB中,继续在一个恒定的温度下(37℃)孵化16小时,然后计算抑制效率。
图6为不同光催化材料在可见光照射下对大肠杆菌的抑制效率对比图。MA-5复合材料比纯Ag2CO3和MoS2表现更好的光催化灭菌效果,在可见光照射下,MA-5复合材料作用的大肠杆菌在80分钟内完全失活,而纯Ag2CO3参与的反应中在相同时间内菌体并没有完全失活,同时MoS2参与的反应中细菌菌落数量没有变化,表明MoS2对细菌细胞没有毒性作用。 显然,Ag2CO3和MoS2构成的异质结是决定光催化活性的重要因素。
以上实施例描述了本发明的主要特征及优点,本行业的技术人员应该了解,本发明不受上述实施例的限制,上述实施例和说明书中描述的只是说明本发明的原理,在不脱离本发明原理的范围下,本发明还会有各种变化和改进,这些变化和改进均落入本发明保护的范围内。
Claims (3)
1.一种MoS2/Ag2CO3异质结光催化材料的合成方法,其特征在于具体步骤为:
步骤S1:将花球状MoS2分散于水中并加入Ag(NO)3超声分散均匀形成悬浊液A;
步骤S2:将Na2CO3溶于水中并搅拌均匀形成溶液B;
步骤S3:将溶液B滴加到悬浊液A中并搅拌混合均匀形成混合液C,其中MoS2与Ag2CO3的质量比为0.05:1,将混合液C搅拌4小时后室温避光静置12小时,离心分离,用水和乙醇分别反复洗涤,再置于真空干燥箱中于60℃真空干燥12h得到由纳米棒和纳米片交错堆积成的粒径为0.5-2μm的花球状MoS2/Ag2CO3异质结光催化材料。
2.根据权利要求1所述的方法制得的MoS2/Ag2CO3异质结光催化材料在降解水体有机污染物和抑制水体致病微生物中的应用,对保护环境以及保证饮用水的安全和人体的健康具有重要意义。
3.根据权利要求2所述的应用,其特征在于:所述有机污染物为有机染料兰纳素5B,所述致病微生物为大肠杆菌。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810731342.9A CN108786873A (zh) | 2018-07-05 | 2018-07-05 | 一种MoS2/Ag2CO3异质结光催化材料的合成及应用 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810731342.9A CN108786873A (zh) | 2018-07-05 | 2018-07-05 | 一种MoS2/Ag2CO3异质结光催化材料的合成及应用 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN108786873A true CN108786873A (zh) | 2018-11-13 |
Family
ID=64075063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810731342.9A Pending CN108786873A (zh) | 2018-07-05 | 2018-07-05 | 一种MoS2/Ag2CO3异质结光催化材料的合成及应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN108786873A (zh) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108855164A (zh) * | 2018-06-19 | 2018-11-23 | 广东工业大学 | 一种碳布负载MoS2/Ag3PO4复合光催化材料的制备方法 |
CN110152700A (zh) * | 2019-04-18 | 2019-08-23 | 广东工业大学 | 一种碳布负载二硫化钼/碳酸银复合光催化剂及其制备方法和应用 |
CN112675805A (zh) * | 2021-01-25 | 2021-04-20 | 西北师范大学 | 一种羟基磷灰石纳米线复合二硫化钼吸附剂的制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060177371A1 (en) * | 2004-06-01 | 2006-08-10 | Wen-Chuan Liu | Method for preparing a gel containing nanometer titanium dioxide powders for visible light photocatalysis |
CN104324740A (zh) * | 2014-10-11 | 2015-02-04 | 武汉理工大学 | 花状MoS2负载Ag3PO4纳米球复合可见光催化剂及其制备方法 |
CN105126844A (zh) * | 2015-08-06 | 2015-12-09 | 江苏大学 | 一种二硫化钼/钒酸银可见光复合光催化剂及其制备方法 |
CN107029771A (zh) * | 2017-05-12 | 2017-08-11 | 湖南大学 | 碳酸银/银/三氧化钨三元复合z型光催化剂及其制备方法和应用 |
CN107970965A (zh) * | 2016-10-21 | 2018-05-01 | 镇江市高等专科学校 | 碳氮烯/碳酸银复合纳米材料、其制备方法及其应用 |
-
2018
- 2018-07-05 CN CN201810731342.9A patent/CN108786873A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060177371A1 (en) * | 2004-06-01 | 2006-08-10 | Wen-Chuan Liu | Method for preparing a gel containing nanometer titanium dioxide powders for visible light photocatalysis |
CN104324740A (zh) * | 2014-10-11 | 2015-02-04 | 武汉理工大学 | 花状MoS2负载Ag3PO4纳米球复合可见光催化剂及其制备方法 |
CN105126844A (zh) * | 2015-08-06 | 2015-12-09 | 江苏大学 | 一种二硫化钼/钒酸银可见光复合光催化剂及其制备方法 |
CN107970965A (zh) * | 2016-10-21 | 2018-05-01 | 镇江市高等专科学校 | 碳氮烯/碳酸银复合纳米材料、其制备方法及其应用 |
CN107029771A (zh) * | 2017-05-12 | 2017-08-11 | 湖南大学 | 碳酸银/银/三氧化钨三元复合z型光催化剂及其制备方法和应用 |
Non-Patent Citations (4)
Title |
---|
CHENGWEIXU ET AL.: ""Preparation, characterization, and photocatalytic properties of silver carbonate"", 《APPLIED SURFACE SCIENCE》 * |
ZEHAO WANG ET AL.: ""In situ synthesized MoS2/Ag dots/Ag3PO4 Z-scheme photocatalysts with ultrahigh activity for oxygen evolution under visible light irradiation"", 《APPLIED SURFACE SCIENCE》 * |
宋永秀: ""碳酸银基复合材料的制备及其光催化降解性能研究"", 《江苏大学硕士学位论文》 * |
白春华: "《非金属矿物基二氧化钛制备、改性及废水处理技术》", 31 December 2015, 中国矿业大学出版社 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108855164A (zh) * | 2018-06-19 | 2018-11-23 | 广东工业大学 | 一种碳布负载MoS2/Ag3PO4复合光催化材料的制备方法 |
CN110152700A (zh) * | 2019-04-18 | 2019-08-23 | 广东工业大学 | 一种碳布负载二硫化钼/碳酸银复合光催化剂及其制备方法和应用 |
CN112675805A (zh) * | 2021-01-25 | 2021-04-20 | 西北师范大学 | 一种羟基磷灰石纳米线复合二硫化钼吸附剂的制备方法 |
CN112675805B (zh) * | 2021-01-25 | 2022-04-19 | 西北师范大学 | 一种羟基磷灰石纳米线复合二硫化钼吸附剂的制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Habibi-Yangjeh et al. | A review on emerging homojunction photocatalysts with impressive performances for wastewater detoxification | |
Xia et al. | Modified stannous sulfide nanoparticles with metal-organic framework: Toward efficient and enhanced photocatalytic reduction of chromium (VI) under visible light | |
Liu et al. | Fabrication and characterization of Ag3PO4/TiO2 heterostructure with improved visible-light photocatalytic activity for the degradation of methyl orange and sterilization of E. coli | |
Liu et al. | Visible-light driven rapid bacterial inactivation on red phosphorus/titanium oxide nanofiber heterostructures | |
Dhull et al. | An overview on InVO4-based photocatalysts: Electronic properties, synthesis, enhancement strategies, and photocatalytic applications | |
Jingyu et al. | In-situ growth of ZnO globular on g-C3N4 to fabrication binary heterojunctions and their photocatalytic degradation activity on tetracyclines | |
CN103599802A (zh) | 一种磷酸银/石墨烯纳米复合材料的制备方法 | |
CN108786873A (zh) | 一种MoS2/Ag2CO3异质结光催化材料的合成及应用 | |
CN105268438B (zh) | 一种等离子体复合光催化剂及其制备方法和应用 | |
Beena et al. | Enhanced photocatalytic and antibacterial activities of ZnSe nanoparticles | |
Hassaan et al. | Principles of photocatalysts and their different applications: a review | |
Vijayan et al. | Constructing Z-scheme g-C3N4/TiO2 heterostructure for promoting degradation of the hazardous dye pollutants | |
CN110639555A (zh) | 一种可见光响应的CdS/CdIn2S4复合纳米结构光催化剂的制备方法及应用 | |
Zuo et al. | Construction of visible light driven silver sulfide/graphitic carbon nitride pn heterojunction for improving photocatalytic disinfection | |
Munishwar et al. | Highly stable CdS quantum dots embedded in glasses and its application for inhibition of bacterial colonies | |
Das et al. | ZrO2@ chitosan composite for simultaneous photodegradation of three emerging contaminants and antibacterial application | |
Yu et al. | Morphology‐controlled fabrication of SnO2/ZnO nanocomposites with enhanced photocatalytic performance | |
CN103785422B (zh) | 菜花状CdS纳米微球光催化剂的制备方法及其应用 | |
CN104437559A (zh) | 一种硒化锌纳米光催化剂的制备方法及其应用 | |
CN105688948B (zh) | 一种光催化剂及其制备方法和应用 | |
Hou et al. | The antifouling tris-(8-hydroxyquinoline) aluminum: titanium dioxide coatings under visible light | |
Ikram et al. | Enhanced photocatalytic and antibacterial activity of TiO2 quantum dots doped with cerium/chitosan for environmental remediation: experimental and theoretical approaches | |
Li et al. | A novel Z-type heterojunction Bi3O4Cl/Bi4O5I2 photocatalytic composite with broad-spectrum antibacterial activity and degradation properties | |
Geng et al. | Efficient photocatalytic inactivation of E. coli by Mn-CdS/ZnCuInSe/CuInS2 quantum dots-sensitized TiO2 nanowires | |
Gao et al. | Photocatalytic degradation of oxytetracycline by UiO-66 doped three-dimensional flower-like MoS2 heterojunction: DFT, degradation pathways, mechanism |
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 | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181113 |
|
WD01 | Invention patent application deemed withdrawn after publication |