JP2019531185A - 鉄ドープ二酸化チタンナノ結晶および光触媒としてのその使用 - Google Patents
鉄ドープ二酸化チタンナノ結晶および光触媒としてのその使用 Download PDFInfo
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- JP2019531185A JP2019531185A JP2019519230A JP2019519230A JP2019531185A JP 2019531185 A JP2019531185 A JP 2019531185A JP 2019519230 A JP2019519230 A JP 2019519230A JP 2019519230 A JP2019519230 A JP 2019519230A JP 2019531185 A JP2019531185 A JP 2019531185A
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- Prior art keywords
- iron
- acid
- photocatalyst
- titanium dioxide
- aqueous solution
- 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.)
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 149
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 73
- 239000002159 nanocrystal Substances 0.000 title claims abstract description 51
- 239000011941 photocatalyst Substances 0.000 title claims abstract description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 117
- 238000000034 method Methods 0.000 claims abstract description 58
- 239000002253 acid Substances 0.000 claims abstract description 42
- 229910052742 iron Inorganic materials 0.000 claims abstract description 41
- 238000005406 washing Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 41
- 239000007864 aqueous solution Substances 0.000 claims description 34
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 10
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 10
- 230000000813 microbial effect Effects 0.000 claims description 10
- 229910021529 ammonia Inorganic materials 0.000 claims description 8
- 238000011109 contamination Methods 0.000 claims description 8
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- 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 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 5
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- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 4
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- VCJMYUPGQJHHFU-UHFFFAOYSA-N iron(3+);trinitrate Chemical compound [Fe+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O VCJMYUPGQJHHFU-UHFFFAOYSA-N 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
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- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 3
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 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 3
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- BMYNFMYTOJXKLE-UHFFFAOYSA-N 3-azaniumyl-2-hydroxypropanoate Chemical compound NCC(O)C(O)=O BMYNFMYTOJXKLE-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 235000009854 Cucurbita moschata Nutrition 0.000 description 2
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- 229910002651 NO3 Inorganic materials 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- MUMGGOZAMZWBJJ-DYKIIFRCSA-N Testostosterone Chemical compound O=C1CC[C@]2(C)[C@H]3CC[C@](C)([C@H](CC4)O)[C@@H]4[C@@H]3CCC2=C1 MUMGGOZAMZWBJJ-DYKIIFRCSA-N 0.000 description 2
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- 229910052737 gold Inorganic materials 0.000 description 2
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 2
- 229940071870 hydroiodic acid Drugs 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000013507 mapping Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
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- 150000003624 transition metals Chemical class 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000608 Fe(NO3)3.9H2O Inorganic materials 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- PMVSDNDAUGGCCE-TYYBGVCCSA-L Ferrous fumarate Chemical compound [Fe+2].[O-]C(=O)\C=C\C([O-])=O PMVSDNDAUGGCCE-TYYBGVCCSA-L 0.000 description 1
- 241000192125 Firmicutes Species 0.000 description 1
- 229910004373 HOAc Inorganic materials 0.000 description 1
- HEFNNWSXXWATRW-UHFFFAOYSA-N Ibuprofen Chemical compound CC(C)CC1=CC=C(C(C)C(O)=O)C=C1 HEFNNWSXXWATRW-UHFFFAOYSA-N 0.000 description 1
- 238000004813 Moessbauer spectroscopy Methods 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 241000191963 Staphylococcus epidermidis Species 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
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- 150000001768 cations Chemical class 0.000 description 1
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- 230000000052 comparative effect Effects 0.000 description 1
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- 150000002506 iron compounds Chemical class 0.000 description 1
- -1 iron ions Chemical class 0.000 description 1
- UCSUOYMTZRJAIH-UHFFFAOYSA-N iron(2+) oxygen(2-) titanium(4+) Chemical compound [O-2].[O-2].[Ti+4].[Fe+2] UCSUOYMTZRJAIH-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
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- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
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- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 1
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- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
本出願は、2016年10月4日に出願された「鉄ドープ二酸化チタンナノ結晶および光触媒としてのその使用」と題する米国特許仮出願第62404006号の利益を主張し、その内容は参照によって本明細書に組み込まれる。
技術分野
本発明技術は、光触媒としての低い酸化鉄の鉄ドープ二酸化チタンナノ結晶に関する。より具体的には、本技術は酸洗浄された、鉄ドープ酸化チタン可視光光触媒である。
(a)本明細書で使用される全ての単語はその状況が要求する性および数(単数または複数)を有するものと解釈されなければならない;
(b)本明細書および添付された特許請求の範囲で使用される単数の語「一つの(a)」、「一つの(an)」および「その(the)」は、その文脈が明白に他様に指定しない限り、複数への言及も含む;
(c)記載された範囲または数値に係る先行詞「約(about)」は、測定方法から当該技術分野で知られまたは期待される範囲または数値の偏差内の近似を表す;
(d)「この中に(herein)」、「これによって(hereby)」、「これに関して(hereof)」、「これに(hereto)」、「上文に(hereinbefore)」および「下文に(hereinafter)」の語および同様の意味の語は、特に指定のない限り、任意の特定の段落、特許請求の範囲又は他の下位区分ではなく、本明細書全体を参照している;
(e)説明的な見出しは便宜のためのみであり、本明細書の任意の部分の意味や構成を統制しまたはそれに影響を及ぼすものでないものとする;および
(f)「または(or)」および「任意の(any)」は排他的なものでなく、また「含む(include)」および「含んでいる(including)」は制限的なものでない。さらに、特に指定のない限り、用語「含んでいる(comprising)」、「有する(having)」、「含んでいる(including)」および「含んでいる(containing)」は、制約のない用語(すなわち、「を含むが、これらに限定されない」ことを意味する)と解釈されるべきである。
定義
実験方法
実験結果
実施例
結論
Claims (28)
- 可視光光触媒を合成する方法であって、二酸化チタンナノ結晶に鉄をドープして鉄ドープ二酸化チタンナノ結晶を準備する工程、前記鉄ドープ二酸化チタンナノ結晶を約4以下のpHを有する酸で洗浄して酸洗浄鉄ドープ二酸化チタンナノ結晶を製造する工程、および前記酸洗浄鉄ドープ二酸化チタンナノ結晶をすすいで前記酸の残留分を除去し、それによって可視光光触媒を提供する工程を含む、方法。
- 前記すすぎ工程が水すすぎである、請求項1に記載の方法。
- 前記酸が約2.5〜約3.5のpHを有する、請求項1または2に記載の方法。
- 前記酸が塩酸である、請求項1〜3のいずれか1項に記載の方法。
- 低い酸化鉄の可視光光触媒を作る方法であって、二酸化チタンナノ結晶に鉄をドープして鉄ドープナノ結晶を準備する工程、前記鉄ドープナノ結晶を約4以下のpHを有する酸で洗浄して少なくとも1種の酸化鉄堆積物を減少させまたは除去して酸洗浄鉄ドープ二酸化チタンナノ結晶を製造する工程、および前記酸洗浄鉄ドープ二酸化チタンナノ結晶をすすいで前記酸の残留分を除去し、それによって低い酸化鉄の可視光光触媒を提供する工程を含む、方法。
- 前記二酸化チタンに鉄をドープする工程が、約2.5〜約3.5のpHで実施される、請求項5に記載の方法。
- 前記酸で洗浄する工程が、約2.5〜約3.5のpHで実施される、請求項5または6に記載の方法。
- 前記酸が塩酸である、請求項7に記載の方法。
- 有機物、少なくとも1種の微生物、少なくとも1種の有機化合物および少なくとも1種の有機金属化合物、のうちの1種以上を含んでいる水性溶液を改善するための可視光光触媒であって、低い酸化鉄含有量を有する酸洗浄鉄ドープ二酸化チタンナノ結晶を含んでいる、可視光光触媒。
- 水性溶液を改善する方法であって、前記水性溶液が少なくとも1種の有機化合物、有機物、微生物汚染または少なくとも1種の有機金属化合物、のうちの1種以上を含んでおり、前記方法が、前記水性溶液を光触媒に曝露させる工程であって、前記光触媒が低減された酸化鉄含有量を有する酸洗浄鉄ドープ二酸化チタンを含んでいる工程;および前記光触媒を光に曝露させ、それによって前記水性溶液を改善しかつ少なくとも1種の改善製品を製造する工程を含む、方法。
- 前記光が可視光線である、請求項10に記載の方法。
- 前記曝露させる工程が、前記水性溶液中に前記光触媒を混合する工程を含む、請求項11に記載の方法。
- 前記曝露させる工程が、固定されている前記光触媒の上に前記水性溶液を流す工程を含む、請求項11に記載の方法。
- 前記曝露させる工程が、中に前記光触媒が固定されている管を通して前記水性溶液を流す工程を含む、請求項13に記載の方法。
- 前記曝露させる工程が、内側に前記光触媒が固定されている収容構造物中に前記水性溶液を保持する工程を含む、請求項11に記載の方法。
- 前記水性溶液が前記微生物汚染を含み、かつ前記改善する工程が微生物の成長を低減しまたは排除する、請求項11に記載の方法。
- 前記微生物汚染が、グラム陽性またはグラム陰性の細菌汚染である、請求項16に記載の方法。
- 水性溶液を改善する方法であって、前記水性溶液がアンモニアを含んでおり、前記方法が前記水性溶液を可視光光触媒に曝露させる工程であって、前記光触媒が実質的に酸化鉄を含んでいない鉄ドープ二酸化チタンを含んでいる工程、および前記光触媒を光に曝露させ、それによって前記水性溶液を改善する工程を含む、方法。
- 前記光が可視光線である、請求項18に記載の方法。
- 前記水性溶液が、少なくとも1種の有機化合物をさらに含んでいる、請求項19に記載の方法。
- 水性溶液の改善に使用される組み合わせ体であって、前記組み合わせ体が可視光光触媒および基板を含んでおり、前記光触媒が、低減された酸化鉄含有量を有する酸洗浄鉄ドープ二酸化チタンを含んでおり、かつ前記光触媒が前記基板に取り付けられている、組み合わせ体。
- 前記基材がガラスである、請求項21に記載の組み合わせ体。
- 前記ガラスがガラス管である、請求項22に記載の組み合わせ体。
- 前記基材がアルミニウムである、請求項21に記載の組み合わせ体。
- 前記アルミニウムが、排水管の内表面を少なくとも部分的にコーティングする、請求項24に記載の組み合わせ体。
- 前記光触媒を照射するように配置された発光源をさらに含んでいる、請求項23または25に記載の組み合わせ体。
- 前記基板が、収容構造物の内表面である、請求項21に記載の組み合わせ体。
- 塗料をさらに含んでいる、請求項21に記載の組み合わせ体。
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