CN108821386A - 一种三价铁离子与硝酸根离子协同光催化降解染料的方法 - Google Patents
一种三价铁离子与硝酸根离子协同光催化降解染料的方法 Download PDFInfo
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- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000006731 degradation reaction Methods 0.000 title claims abstract description 22
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 230000015556 catabolic process Effects 0.000 title claims abstract description 21
- 229910001447 ferric ion Inorganic materials 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007146 photocatalysis Methods 0.000 title claims abstract description 16
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 16
- 239000000975 dye Substances 0.000 claims abstract description 40
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 6
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims abstract description 5
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 4
- 239000007858 starting material Substances 0.000 claims abstract 2
- 238000005286 illumination Methods 0.000 claims description 7
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical compound O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 4
- 238000002835 absorbance Methods 0.000 claims description 3
- 239000000987 azo dye Substances 0.000 claims description 2
- 125000000623 heterocyclic group Chemical group 0.000 claims description 2
- 238000004088 simulation Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000005518 electrochemistry Effects 0.000 abstract description 2
- 238000006053 organic reaction Methods 0.000 abstract description 2
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- 238000012545 processing Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 12
- 239000000243 solution Substances 0.000 description 9
- -1 sulphur Compound Chemical class 0.000 description 7
- FBAFATDZDUQKNH-UHFFFAOYSA-M iron chloride Chemical compound [Cl-].[Fe] FBAFATDZDUQKNH-UHFFFAOYSA-M 0.000 description 6
- 235000010344 sodium nitrate Nutrition 0.000 description 6
- 239000004317 sodium nitrate Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 229940012189 methyl orange Drugs 0.000 description 4
- STZCRXQWRGQSJD-GEEYTBSJSA-M methyl orange Chemical compound [Na+].C1=CC(N(C)C)=CC=C1\N=N\C1=CC=C(S([O-])(=O)=O)C=C1 STZCRXQWRGQSJD-GEEYTBSJSA-M 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 3
- 241001062009 Indigofera Species 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000004042 decolorization Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RBTBFTRPCNLSDE-UHFFFAOYSA-N 3,7-bis(dimethylamino)phenothiazin-5-ium Chemical compound C1=CC(N(C)C)=CC2=[S+]C3=CC(N(C)C)=CC=C3N=C21 RBTBFTRPCNLSDE-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- OUUQCZGPVNCOIJ-UHFFFAOYSA-M Superoxide Chemical compound [O-][O] OUUQCZGPVNCOIJ-UHFFFAOYSA-M 0.000 description 2
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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- 229910021506 iron(II) hydroxide Inorganic materials 0.000 description 2
- YIXJRHPUWRPCBB-UHFFFAOYSA-N magnesium nitrate Chemical compound [Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O YIXJRHPUWRPCBB-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
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- 125000000325 methylidene group Chemical group [H]C([H])=* 0.000 description 2
- 229960000907 methylthioninium chloride Drugs 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- ONDPHDOFVYQSGI-UHFFFAOYSA-N zinc nitrate Chemical compound [Zn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ONDPHDOFVYQSGI-UHFFFAOYSA-N 0.000 description 2
- QBZIEGUIYWGBMY-FUZXWUMZSA-N (5Z)-5-hydroxyimino-6-oxonaphthalene-2-sulfonic acid iron Chemical compound [Fe].O\N=C1/C(=O)C=Cc2cc(ccc12)S(O)(=O)=O.O\N=C1/C(=O)C=Cc2cc(ccc12)S(O)(=O)=O.O\N=C1/C(=O)C=Cc2cc(ccc12)S(O)(=O)=O QBZIEGUIYWGBMY-FUZXWUMZSA-N 0.000 description 1
- MPVDXIMFBOLMNW-ISLYRVAYSA-N 7-hydroxy-8-[(E)-phenyldiazenyl]naphthalene-1,3-disulfonic acid Chemical compound OC1=CC=C2C=C(S(O)(=O)=O)C=C(S(O)(=O)=O)C2=C1\N=N\C1=CC=CC=C1 MPVDXIMFBOLMNW-ISLYRVAYSA-N 0.000 description 1
- JUQPZRLQQYSMEQ-UHFFFAOYSA-N CI Basic red 9 Chemical compound [Cl-].C1=CC(N)=CC=C1C(C=1C=CC(N)=CC=1)=C1C=CC(=[NH2+])C=C1 JUQPZRLQQYSMEQ-UHFFFAOYSA-N 0.000 description 1
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- RGCKGOZRHPZPFP-UHFFFAOYSA-N alizarin Chemical compound C1=CC=C2C(=O)C3=C(O)C(O)=CC=C3C(=O)C2=C1 RGCKGOZRHPZPFP-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
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- DEGAKNSWVGKMLS-UHFFFAOYSA-N calcein Chemical compound O1C(=O)C2=CC=CC=C2C21C1=CC(CN(CC(O)=O)CC(O)=O)=C(O)C=C1OC1=C2C=C(CN(CC(O)=O)CC(=O)O)C(O)=C1 DEGAKNSWVGKMLS-UHFFFAOYSA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- OIQPTROHQCGFEF-UHFFFAOYSA-L chembl1371409 Chemical compound [Na+].[Na+].OC1=CC=C2C=C(S([O-])(=O)=O)C=CC2=C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 OIQPTROHQCGFEF-UHFFFAOYSA-L 0.000 description 1
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- IQFVPQOLBLOTPF-HKXUKFGYSA-L congo red Chemical compound [Na+].[Na+].C1=CC=CC2=C(N)C(/N=N/C3=CC=C(C=C3)C3=CC=C(C=C3)/N=N/C3=C(C4=CC=CC=C4C(=C3)S([O-])(=O)=O)N)=CC(S([O-])(=O)=O)=C21 IQFVPQOLBLOTPF-HKXUKFGYSA-L 0.000 description 1
- OBRMNDMBJQTZHV-UHFFFAOYSA-N cresol red Chemical compound C1=C(O)C(C)=CC(C2(C3=CC=CC=C3S(=O)(=O)O2)C=2C=C(C)C(O)=CC=2)=C1 OBRMNDMBJQTZHV-UHFFFAOYSA-N 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- SEACYXSIPDVVMV-UHFFFAOYSA-L eosin Y Chemical compound [Na+].[Na+].[O-]C(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C([O-])=C(Br)C=C21 SEACYXSIPDVVMV-UHFFFAOYSA-L 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- CEQFOVLGLXCDCX-WUKNDPDISA-N methyl red Chemical compound C1=CC(N(C)C)=CC=C1\N=N\C1=CC=CC=C1C(O)=O CEQFOVLGLXCDCX-WUKNDPDISA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229960002378 oftasceine Drugs 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 150000003254 radicals Chemical class 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 229940043267 rhodamine b Drugs 0.000 description 1
- OARRHUQTFTUEOS-UHFFFAOYSA-N safranin Chemical compound [Cl-].C=12C=C(N)C(C)=CC2=NC2=CC(C)=C(N)C=C2[N+]=1C1=CC=CC=C1 OARRHUQTFTUEOS-UHFFFAOYSA-N 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- LGZQSRCLLIPAEE-UHFFFAOYSA-M sodium 1-[(4-sulfonaphthalen-1-yl)diazenyl]naphthalen-2-olate Chemical compound [Na+].C1=CC=C2C(N=NC3=C4C=CC=CC4=CC=C3O)=CC=C(S([O-])(=O)=O)C2=C1 LGZQSRCLLIPAEE-UHFFFAOYSA-M 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- XOSXWYQMOYSSKB-LDKJGXKFSA-L water blue Chemical compound CC1=CC(/C(\C(C=C2)=CC=C2NC(C=C2)=CC=C2S([O-])(=O)=O)=C(\C=C2)/C=C/C\2=N\C(C=C2)=CC=C2S([O-])(=O)=O)=CC(S(O)(=O)=O)=C1N.[Na+].[Na+] XOSXWYQMOYSSKB-LDKJGXKFSA-L 0.000 description 1
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- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- 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
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- 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
- C02F2305/02—Specific form of oxidant
- C02F2305/023—Reactive oxygen species, singlet oxygen, OH radical
-
- 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
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Abstract
本发明公开了一种三价铁离子与硝酸根离子协同光催化降解染料的方法,以铁盐和硝酸盐为起始原料,在太阳光或紫外光的照射下,利用Fe3+与NO3 −的协同催化作用,对染料进行降解。本发明方法对各种类型和结构的染料均有异常明显的协同效果。本发明具有原料广,成本低,效率高,反应条件温和,后处理简单,操作方便等特点。不仅为处理染料提供了一个新的思路和方法,而且对构建其它新的协同体系具有重要的指导意义。同时本发明也有可能在有机反应、有机合成、电化学和光化学等领域具有广泛的应用价值。
Description
技术领域
本发明属于光化学技术领域,具体涉及一种三价铁离子与硝酸根离子协同光催化降解染料的方法。
背景技术
光催化技术由于在环境污染控制,太阳能及生物制氢,染料敏化太阳能电池生产等众多重要领域具有广阔的应用前景而吸引人们极大的关注。到目前为止,金属氧化物,硫化物,氮化物,以及它们的固溶体等催化剂被广泛用来降解有机污染物,同时,许多国内外学者尝试对光催化剂进行大量的改性工作,比如金属沉积,过渡金属掺杂,非金属元素掺杂,表面光敏化,构建复合材料等来提高它们的量子效率和实际应用范围。但是,在光催化剂的应用过程中依然有一些需要解决的问题,因为量子效率低,选择性差,稳定性不好及半导体本身结构的不理想等因素会限制光催化剂的催化性能。因此,在光催化领域研究新型具有高活性,高选择性催化剂或光激反应体系还需要付出大量的努力。
专利(CN 108147495 A)一种利用硝酸根离子使染料降解褪色的方法,研究发现,在太阳光或紫外光的照射下,使用硝酸根离子(NO3 -)可降解各种染料。其原因是NO3 -在太阳光或紫外光的照射下,产生羟基自由基(·OH)和·NO2,然后·NO2迅速水合生成·NO3 2─,·NO3 2─与溶液中的氧气再接着发生反应产生超氧负离子自由基(·O2 ─)。即硝酸根离子光解产生的羟基自由基(·OH)以及·NO3 2─与氧气反应生成的超氧负离子自由基(·O2 ─)具有强氧化性,对降解染料起到至关重要的作用。而且,硝酸根离子在反应中作为反应物,浓度越大越有利于染料降解反应的进行。但是,在实际应用中,使染料尤其是高浓度的染料完全脱色要花较长时间,或者在快速降解染料的同时过高的硝酸根浓度也会对水体造成污染,与人们的理想目标还有一定的距离。
研究表明,三价铁离子(Fe3+)在水中水解生成Fe(OH)2+,在光照下可产生二价铁(Fe2+)和羟基自由基(·OH),所以也能将有机物矿化。这就给我们一个启示,将Fe3+与NO3 -组合构成一个新的协同光反应体系或许是个好方法。
发明内容
基于上述内容,本发明提供了一种三价铁离子与硝酸根离子协同光催化降解染料的方法。
为达到上述目的,本发明采用以下技术方案:
一种三价铁离子与硝酸根离子协同光催化降解染料的方法,具体步骤如下:
于烧杯中配制1L浓度2.0mg/L-10.0mg/L的模拟染料水溶液,调节反应液初始pH在6.0-7.0,将铁盐(氯化铁、硫酸铁等)与硝酸盐(硝酸钠、硝酸钾,硝酸镁,硝酸钙,硝酸锌,硝酸铝等)同时加入到染料中,以紫外灯或直接以太阳光为光源,光照搅拌反应。
其中,控制反应溶液中Fe3+与NO3 -的浓度在0.1-20g/L。
用分光光度计分别测出溶液在光照前吸光度(A0)和光照后的吸光度(A),从而可以算出染料的脱色率η=(A0-A)/A0×100%。如果氯化铁和硝酸钠对染料的脱色率分别为η1,η2,且协同体系的脱色率η>η1+η2,即可判断本发明对染料的协同脱色效果。
本发明染料降解的原理如下:
在太阳光或紫外光的照射下,Fe3+先水解生成Fe(OH)2+,其在光照下产生Fe2+和·OH,如反应(1)-(2)所示。
Fe3++H2O→Fe(OH)2++H+ (1)
Fe(OH)2++hv→Fe2++·OH (2)
同时,NO3 ─在光照时先生成·NO2和·OH,然后·NO2迅速水合生成·NO3 2─,·NO3 2─与溶液中的氧气再接着发生反应产生·O2 ─,如反应(3)-(5)所示。
·NO2+H2O→·NO3 2─+2H+ (4)
·NO3 2─+O2→NO3 ─+·O2 ─ (5)
即Fe3+与NO3 -同时引入光催化反应体系中,有利于·OH自由基的产生,也促使·O2 ─的生成,从而有效提高染料的降解速率。
在太阳光或紫外光照射下,Fe3+与NO3 -对各种类型和结构的染料,比如偶氮染料:甲基橙、日落黄、刚果红、橙黄G、丽春红S、甲基红、酸性红G等,醌类染料:如罗丹明B、亚甲基蓝、碱性品红、茜素红、甲酚红、曙红Y、结晶紫、酸性品红、苯胺蓝、胭脂红等,杂环类染料:如靛蓝、番红花红T、钙黄绿素、萘酚绿B等不仅在短时间内均能降解处理,而且有明显的协同作用,达到预期目的。
本发明是在太阳光或紫外光的照射下,利用Fe3+与NO3 -构建成新的协同光催化体系,对染料进行降解。结果表明,该体系对各种类型和结构的染料均有异常明显的协同效果。本发明具有原料广,成本低,效率高,反应条件温和,后处理简单,操作方便等特点。不仅为处理染料提供了一个新的思路和方法,而且对构建其它新的协同体系具有重要的指导意义。同时本发明在有机反应、有机合成、电化学和光化学等领域也具有广泛的应用价值。
具体实施方式
下面通过具体实施例进一步说明本发明。
实施例1
以甲基橙为例。光催化反应均在光催化反应器中进行。
光催化反应器由两部分组成,第一部分是一个环行的石英玻璃套管,中间空筒内平放一支375W中压汞灯(特征波长为365nm)作为光源。石英玻璃套管内层夹套通有循环冷却水,可控制反应液温度在20℃左右;第二部分是一个开口的直径为12cm的烧杯,在反应开始前向烧杯中加入一定量的反应液,氯化铁和硝酸钠,并用磁子不停的搅拌。反应过程中,保持灯源到反应液面的高度为11cm。实验过程中,反应液的初始pH值为6.0,甲基橙的初始浓度为10.0mg/L,氯化铁和硝酸钠的浓度分别为2.0g/L和6.0g/L。实验结果表明,甲基橙在光照时间5min后该协同体系的降解率η为44.3%,而在同样条件下氯化铁和硝酸钠对染料的降解率分别为13.9%(η1)和6.5%(η2),η>η1+η2,所以Fe3+与NO3 -的光激协同作用明显。
实施例2
按照实施例1同样条件降解亚甲基蓝。实验过程中,反应液的初始pH值为6.0,亚甲基蓝的初始浓度为5.0mg/L。实验结果表明,亚甲基蓝在光照时间5min后该协同体系的降解率η高达95.2%,而在同样条件下氯化铁和硝酸钠对染料的降解率分别为20.7%(η1)和19.8%(η2),η>η1+η2,即Fe3+与NO3 -的光激协同作用显著。
以上所述仅为本发明的优选实施方式,应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,做出若干改进和变换,这些都属于本发明的保护范围。
Claims (4)
1.一种三价铁离子与硝酸根离子协同光催化降解染料的方法,其特征在于,以铁盐和硝酸盐为起始原料,在太阳光或紫外光的照射下,利用Fe3+与NO3 −的协同催化作用,对染料进行降解。
2.根据权利要求1所述的一种三价铁离子与硝酸根离子协同光催化降解染料的方法,其特征在于,具体方法如下:
于烧杯中配制1L浓度2.0mg/L-10.0mg/L的模拟染料水溶液,用分光光度计测出溶液吸光度(A0),调节反应液初始pH在6.0-7.0,之后加入铁盐和硝酸盐,以紫外灯或直接以太阳光为光源,光照搅拌反应,用分光光度计测出溶液的吸光度(A),从而可以算出染料的脱色率η=(A0-A)/A0×100%。
3.根据权利要求2所述的一种三价铁离子与硝酸根离子协同光催化降解染料的方法,其特征在于,所述硝酸盐、铁盐混合加入染料溶液中,Fe3+与NO3 −的浓度控制在0.1-20g/L。
4.根据权利要求1所述的一种三价铁离子与硝酸根离子协同光催化降解染料的方法,其特征在于,所述染料包括偶氮染料、醌类染料、杂环类染料。
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