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Hydroxylation of Phenol Catalyzed by Iron Metal-Organic Framework (Fe-BTC) with Hydrogen Peroxide 被引量:1
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作者 Samiran Bhattacharjee Mohammad A. Matin 《Journal of Materials Science and Chemical Engineering》 2020年第2期55-64,共10页
Liquid phase catalytic hydroxylation of phenol by Fe-containing metal-organic framework, Fe-BTC (BTC = 1,3,5-benzenetricarboxylate) using 30% H2O2 as an oxidant and H2O as solvent showed good activity and stability un... Liquid phase catalytic hydroxylation of phenol by Fe-containing metal-organic framework, Fe-BTC (BTC = 1,3,5-benzenetricarboxylate) using 30% H2O2 as an oxidant and H2O as solvent showed good activity and stability under mild reaction conditions. Phenol reacts with hydrogen peroxide over Fe-BTC to produce two main products, viz., catechol and hydroquinone. The effect of temperature, time, substrate/hydrogen peroxide mole ratio and amount of catalyst on catalytic performance were studied. The catalyst could be reused four times without losing significant loss of catalytic performance. The crystallinity and structure of catalyst were unchanged during the catalysis reaction, as confirmed by comparison of XRD and SEM of the fresh and reused catalyst. A reaction mechanism is proposed based on the experimental results. 展开更多
关键词 METAL-ORGANIC Frameworks Fe-BTC phenol hydroxylation hydrogen peroxide
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Phenol Oxidation by Combined Cavitation Water Jet and Hydrogen Peroxide 被引量:1
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作者 卢义玉 刘勇 +1 位作者 夏彬伟 左伟芹 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第4期760-767,共8页
The paper presents results of phenol oxidized under the conditions of high temperature created during collapse of cavitation bubbles.The degradation efficiency has been greatly improved by using cavitation water jets ... The paper presents results of phenol oxidized under the conditions of high temperature created during collapse of cavitation bubbles.The degradation efficiency has been greatly improved by using cavitation water jets combined with H2O2 as demonstrated in laboratory tests.Various factors affecting phenol removal ratio were ex-amined and the degradation mechanism was revealed by high performance liquid chromatography(HPLC).The re-sults showed that 99.85% of phenol was mineralized when phenol concentration was 100 mg·L-1 with pH value of 3.0,H2O2 concentration of 300 mg·L-1,confining pressure of 0.5 MPa,and pumping pressure of 20 MPa.The in-termediate products after phenol oxidation were composed of catechol,hydroquinone and p-benzoquinone.Finally,phenol was degraded into maleic acid and acetic acid.Furthermore,a dynamic model of phenol oxidation via cavi-tation water jets combined with H2O2 has been developed. 展开更多
关键词 phenol oxidation cavitation water jet hydrogen peroxide wastewater treatment correlation coeffi-cient removal ratio
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The effect of hydrogen peroxide on properties of Ce0.35Zr0.55La0.055Pr0.045O2 oxides and the catalytic performance usedon Pd supported three-way catalyst 被引量:5
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作者 Qi wang Meisheng Cui +4 位作者 Xiaowei Huang Yongke Hou Mei Yue Qiang Zhong YongqiZhang 《Journal of Rare Earths》 SCIE EI CAS CSCD 2017年第11期1092-1101,共10页
In this study,two series of cerium zirconium mixed oxides CeZrLaPrOwere prepared under traditional co-precipitation and oxidation co-precipitation methods respectively. The physicochemical properties of the samples we... In this study,two series of cerium zirconium mixed oxides CeZrLaPrOwere prepared under traditional co-precipitation and oxidation co-precipitation methods respectively. The physicochemical properties of the samples were compared under these two methods and assessed by XRD,Raman,BET,TEM,HTPR,OSC,XPS and catalysts measurements. The formation of homogeneity phase structure can be facilitated by changing the precipitating properties of Ce3+ under oxidation coprecipitation method, which is helpful to enhance the homogeneity of Ce and Zr at atomic level.What’s more, it is conducive to remove impurities Na~+ and Cl~-by oxidation co-precipitation with hydrogen peroxide. The catalysts activities are related to both the redox properties and the textural properties of mixed oxides. The Pd-only TWCs supported on the CZLP-H-F exhibits better catalytic performance and thermal stability with wider air/fuel ratio operation window, lower light-off and full conversion temperatures of CHand NO. The homogeneity of phase structure for cerium zirconium mixed oxide can be predicted and deduced from detecting the atomic distribution uniformity of its precursor. So this work not only provides insights into the mechanisms for phase segregation of cerium zirconium mixed oxide, but also provides a guidance to improve homogeneity of cerium zirconium mixed oxide by adding additives. 展开更多
关键词 Cerium zirconium mixed oxides CO-PRECIPITATION hydrogen peroxide Catalytic performance
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Catalysis of the rare earth containing mixed oxides Ln_2CuO_4 in phenol hydroxylation
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作者 刘持标 赵震 +1 位作者 叶兴凯 吴越 《Science China Chemistry》 SCIE EI CAS 1997年第5期512-516,共5页
Mixed oxides Ln2CuO4±λ(Ln=La,Pr,Nd,Sm,Gd) with K2NiF4 structure were prepared Their crystal structures were studied with XRD and IR spectra.Meanwhile,the average valence of Cu ions and non stoichiometric oxygen ... Mixed oxides Ln2CuO4±λ(Ln=La,Pr,Nd,Sm,Gd) with K2NiF4 structure were prepared Their crystal structures were studied with XRD and IR spectra.Meanwhile,the average valence of Cu ions and non stoichiometric oxygen (λ) were determined through chemical analyses.Catalysis of the above-mentioned mixed oxides in the phenol hydroxylation was investigated.Results show that the catalysis of these mixed oxides has close relation with their structures and composition.Substitution of A site atom in Ln2CuO4λ has a great influence on then eatalysis in the phenol hydroxylation. 展开更多
关键词 mixed oxides hydrogen peroxide phenol hydroxylation
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Perovskite-like mixed oxides La_(2-x)(Sr,Th)_xCuO_(4±λ)——A novel catalyst for phenol hydroxylation
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作者 刘持标 赵震 +2 位作者 杨向光 叶兴凯 吴越 《Science China Mathematics》 SCIE 1997年第11期1210-1215,共0页
Two groups of mixed oxides La2-xThxCuO4±λ(0.0≤x≤0.4)and La2-xSrxCuO4±λ(0.0≤x≤1.0) were prepared.Their crystal structures were studied with XRD and IR spectra,etc.Meanwhile,the average valence of Cu ion... Two groups of mixed oxides La2-xThxCuO4±λ(0.0≤x≤0.4)and La2-xSrxCuO4±λ(0.0≤x≤1.0) were prepared.Their crystal structures were studied with XRD and IR spectra,etc.Meanwhile,the average valence of Cu ions and nonstoichiometric oxygen (λ) was measured through chemical analyses.Catalysis of the above-mentioned mixed oxides was investigated in phenol hydroxylation,good results were obtained for some mixed oxides,and found that the catalysis of these mixed oxides have close relation with their defect structure and composition.A radical substitution mechanism was also proposed for this catalytic reaction. 展开更多
关键词 mixed oxides hydrogen peroxide phenol hydroxylation.
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Y-Ba-Cu-O mixed oxides for production of diphenols in liquid-solid phase
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作者 Liu, CB Zhao, Z +2 位作者 Yang, XG Ye, XK Wu, Y 《Chinese Journal of Chemistry》 SCIE CAS CSCD 1996年第6期516-524,共9页
Superconductor mixed oxides were often used as catalysts at higher temperature in gas phase oxidations, and considered not suitable for lower temperature reactions in the liquid-solid phase; here the catalysis of YBa2... Superconductor mixed oxides were often used as catalysts at higher temperature in gas phase oxidations, and considered not suitable for lower temperature reactions in the liquid-solid phase; here the catalysis of YBa2Cu3O7+/-x and Y2BaCuO5+/-x in the phenol hydroxylation at lower temperature with H2O2 as oxygen donor was studied, and found that the superconductor YBa2Cu3O7+/-x, has no catalytic activity for phenol hydroxylation, but Y2BaCuO5+/-x does, even has better catalytic activity and stability than most previously reported ones. With the studies of catalysis of other simple metal oxides and perovskite-like mixed oxides, a radical substitution mechanism is proposed and the experimental facts are explained clearly, and draw a conclusion that the perovskite-like mixed oxides with (AO)(ABO(3)) and (AO)2(ABO(3)) structure have better catalytic activity than the simple perovskite oxides with (ABO(3))(3) structure alone, and (AO) structure unit is the key for the mixed oxides to have the phenol hydroxylation activity. No pollution of this process is very important for its further industrial application. 展开更多
关键词 SUPERCONDUCTOR mixed oxides phenol hydroxylation radical substitution
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Highly Dispersed Pd Nanoparticles Supported on Zr-Doped MgAl Mixed Metal Oxides for 2-Ethylanthraquinone Hydrogenation 被引量:1
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作者 Yunhao Wang Kaige Gao +3 位作者 Chenliang Ye Ang Li Cuili Guo Jinli Zhang 《Transactions of Tianjin University》 EI CAS 2019年第6期576-585,共10页
In this study,Pd-Mg(Al)-LDH/γ-Al2O3 and Pd-Mg(Al)Zr-LDH/γ-Al2O3 precursors were synthesized by impregnating Na2PdCl4 on Mg(Al)-LDH/γ-Al2O3 and Mg(Al)Zr-LDH/γ-Al2O3,and then the precursors were calcinated and reduc... In this study,Pd-Mg(Al)-LDH/γ-Al2O3 and Pd-Mg(Al)Zr-LDH/γ-Al2O3 precursors were synthesized by impregnating Na2PdCl4 on Mg(Al)-LDH/γ-Al2O3 and Mg(Al)Zr-LDH/γ-Al2O3,and then the precursors were calcinated and reduced to obtain Pd-Mg(Al)-MMO/γ-Al2O3 and Pd-Mg(Al)Zr-MMO/γ-Al2O3 catalysts.Compared with Pd/γ-Al2O3 catalyst,the hydrogenation efficiency of Pd-Mg(Al)-MMO/γ-Al2O3 and Pd-Mg(Al)Zr-MMO/γ-Al2O3 increased by 15.7%and 24.0%,respectively.Moreover,the stability of Pd-Mg(Al)Zr-MMO/γ-Al2O3 catalyst was also higher than that of Pd/γ-Al2O3.After four runs,the hydrogenation efficiency of Pd/γ-Al2O3 decreased from 12.1 to 10.0 g/L,while that of Pd-Mg(Al)Zr-MMO/γ-Al2O3 decreased from 15.0 to 14.3 g/L.The active aquinones selectivities of all catalysts were almost 99%.The structures of the catalysts were characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),N2 adsorption–desorption,inductively coupled plasma-atomic emission spectrometry(ICP-AES),CO chemisorption analysis,transmission electron microscopy(TEM),temperature-programmed reduction with hydrogen(H2-TPR),and X-ray photoelectron spectroscopy(XPS).The results indicate that the improved catalytic performance is attributed to the stronger interaction between Pd and Mg(Al)Zr-MMO/γ-Al2O3,smaller Pd particle size and higher Pd dispersion.This work develops an effective method to synthesize highly dispersed Pd nanoparticles based on the layered double hydroxides(LDHs)precursor. 展开更多
关键词 LDHS precursor mixed metal oxides Pd nanoparticles 2-ETHYLANTHRAQUINONE hydrogenATION hydrogen peroxide
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Tunable catalytic activity of gadolinium-doped ceria nanoparticles for pro-oxidation of hydrogen peroxide 被引量:4
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作者 Anuja Bhalkikar Tai-Sing Wu +5 位作者 Tamra J.Fisher Anandakumar Sarella Dawei Zhang Yi Gao Yun-Liang Soo Chin Li Cheung 《Nano Research》 SCIE EI CAS CSCD 2020年第9期2384-2392,共9页
We report a study of the roles of gadolinium(lll)(Gd3+)dopants in influencing the catalytic activity of gadolinium-doped ceria nanoparticles towards the pro-oxidation of hydrogen peroxide to hydroxyl radicals.These do... We report a study of the roles of gadolinium(lll)(Gd3+)dopants in influencing the catalytic activity of gadolinium-doped ceria nanoparticles towards the pro-oxidation of hydrogen peroxide to hydroxyl radicals.These doped ceria nanoparticles with dopant concentrations of 0.6 wt.%,3 wt.%,and 6 wt.%Gd^3+were synthesized using an ozone-mediated method for tuning their catalytic activities.The Gd dopants were found to foster an increase in the percentage of Ce^3+ions in the doped ceria nanoparticles.Our reaction kinetic study revealed that the relationship between the overall reaction rates and the Gd dopant concentrations in our doped materials followed a volcano-like trend.In contrast,the apparent activation energy values of these Gd-doped ceria nanoparticles were found to be positively associated with the concentrations of Gd dopants.The overall catalytic activity trend was attributed to the interplay between the promotion and degradation effects of the Gd dopants on the properties of doped ceria nanoparticles. 展开更多
关键词 CERIA cerium oxide GADOLINIUM pro-oxidation hydrogen peroxide hydroxyl radicals ozone
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Degradation Mechanism of Phenol in C/PTFE O_2-Fed Cathode by Determining the Product of Oxygen Electroreduction 被引量:6
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作者 Hui WANG Xiu Juan YU De Zhi SUN 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第8期1129-1132,共4页
A terylene membrane which kept pH〉12 in cathode compartment was used to construct a divided cell with a carbon/polytetrafluoroethylene(C/PTFE) O2-fed cathode. The concentrations of hydrogen peroxide (H2O2) and hy... A terylene membrane which kept pH〉12 in cathode compartment was used to construct a divided cell with a carbon/polytetrafluoroethylene(C/PTFE) O2-fed cathode. The concentrations of hydrogen peroxide (H2O2) and hydroxyl radical (HO^-)in the catholyte were 8.3 mg/L and 2.15 μmol/L, respectivel.y, which were determined by permanganate titration, electron spin resonance (ESR) spectrum and the fluorescence spectra. ;The efficiency of the removal of phenol achieved 100% as a result of these two kinds of stronger oxidizer. 展开更多
关键词 Electrochemical oxidation C/PTFE O2-fed cathode hydrogen peroxide hydroxyl radical.
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Complete degradation of high-loaded phenol using tungstate-based ionic liquids with long chain substituent at mild conditions 被引量:1
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作者 Yingying Yang Honglei Fan +2 位作者 Tianbin Wu Guanying Yang Buxing Han 《Green Energy & Environment》 SCIE EI CSCD 2023年第2期452-458,共7页
Phenol in waste water threatens human health and is difficultly to be decomposed by nature.Efficient degradation of high-loaded phenol in water under mild condition is still a great challenge.Herein,ionic liquids with... Phenol in waste water threatens human health and is difficultly to be decomposed by nature.Efficient degradation of high-loaded phenol in water under mild condition is still a great challenge.Herein,ionic liquids with tungstate anion were designed and prepared.It was found that dodecyltrimethylammonium tungstate could catalyzed degradation of phenol into gases and water thoroughly at 323 k in 8 h.Tungstate anion revealed good catalytic oxidative activity and long carbon chain group connecting with cation of ionic liquids enriched phenol around catalysts,which induced the complete degradation of phenol at mild conditions.Increasing the amounts of hydrogen peroxide benefited to the total degradation of phenol.In addition,the ionic liquid could be reused for its excellent thermal stability.Our work provided a different strategy to treat waste water containing phenol efficiently. 展开更多
关键词 Ionic liquid Oxidative degradation phenol TUNGSTATE hydrogen peroxide
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酚醛树脂-氧化石墨烯复合光催化剂的制备和性能研究
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作者 胡晓宇 张津 +2 位作者 李素艳 李钰波 张立军 《天津理工大学学报》 2024年第1期121-125,共5页
目前,化石能源的使用正逐渐引起严重的环境问题,高效利用太阳能已成为绿色能源的最佳选择之一。过氧化氢(H_(2)O_(2))是一种不含碳元素的洁净的能量物质,它在燃料电池中具有很大的应用潜力,利用太阳能合成H_(2)O_(2)具有重要的现实意义... 目前,化石能源的使用正逐渐引起严重的环境问题,高效利用太阳能已成为绿色能源的最佳选择之一。过氧化氢(H_(2)O_(2))是一种不含碳元素的洁净的能量物质,它在燃料电池中具有很大的应用潜力,利用太阳能合成H_(2)O_(2)具有重要的现实意义。特定结构的酚醛树脂(phenolic resin,PF)能有效促进光合成H_(2)O_(2),为研究氧化石墨烯(graphene oxicle,GO)对酚醛树脂光催化剂的影响,利用水热法制备了3种不同PF含量的酚醛树脂-氧化石墨烯(pheholic resin-graphene oide,PF-GO)复合光催化剂,探讨了空气环境下通过可见光照射产H_(2)O_(2)的性能。结果表明,PF微球均匀分布于GO组成的三维网络结构中,由于GO的加入,拓宽了催化剂的光谱吸收范围;利用空气搅拌并提供氧气时,能低成本地合成H_(2)O_(2),且H_(2)O_(2)的产量随着催化剂中PF用量的增加而增加,说明PF-GO复合光催化剂具有很高的研发价值。 展开更多
关键词 光催化 酚醛树脂(PF) 氧化石墨烯(GO) 过氧化氢(H_(2)O_(2))
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Cu修饰的MCM-41的合成、表征及对芳烃羟化反应催化作用的研究 被引量:24
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作者 孙建敏 孟祥举 +6 位作者 王润伟 林文勇 林凯峰 庞文琴 蒋大振 徐如人 肖丰收 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2000年第9期1451-1454,共4页
利用 MCM-4 1形成过程中协同自组装的特点 ,在合成过程中引入 Cu(NH3) 2 +4 ,制备出过渡金属表面修饰的纯硅介孔分子筛 Cu-MCM-4 1 ,采用 XRD,ICP,ESR,N2 吸附等手段确定 Cu处于 MCM-4 1的表面 ,取代了端羟基中氢的位置 ,与骨架桥氧和... 利用 MCM-4 1形成过程中协同自组装的特点 ,在合成过程中引入 Cu(NH3) 2 +4 ,制备出过渡金属表面修饰的纯硅介孔分子筛 Cu-MCM-4 1 ,采用 XRD,ICP,ESR,N2 吸附等手段确定 Cu处于 MCM-4 1的表面 ,取代了端羟基中氢的位置 ,与骨架桥氧和硅羟基中的氧配位 .利用苯酚羟化反应为探针 ,考察了 Cu-MCM-4 1的催化活性 .结果表明 ,Cu-MCM-4 1具有很高的苯酚羟化活性 ,与 TS-1分子筛的催化效果相当 ,对萘酚的羟化活性也较高 . 展开更多
关键词 介孔分子筛 苯酚 萘酚 羟化 合成 催化 MCM-41
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微波诱导Fe_2O_3/Al_2O_3催化剂催化氧化处理水中苯酚 被引量:40
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作者 张国宇 王鹏 +2 位作者 石岩 马慧俊 洪光 《催化学报》 SCIE CAS CSCD 北大核心 2005年第7期597-601,共5页
以γ-Al_2O_3为载体,采用浸渍焙烧法制备了Fe_2O_3/Al_2O_3催化剂,并将其应用于微波诱导催化氧化处理模拟含酚废水.X射线衍射和X射线荧光光谱测试结果表明,活性组分氧化铁在催化剂中以α-Fe_2O_3的形式存在,其含量为3.71%.与载体氧化铝... 以γ-Al_2O_3为载体,采用浸渍焙烧法制备了Fe_2O_3/Al_2O_3催化剂,并将其应用于微波诱导催化氧化处理模拟含酚废水.X射线衍射和X射线荧光光谱测试结果表明,活性组分氧化铁在催化剂中以α-Fe_2O_3的形式存在,其含量为3.71%.与载体氧化铝相比,Fe_2O_3/Al_2O_3催化剂的比表面积和平均孔径及平均孔容略有降低.对于100mg/L的模拟含酚废水,最佳的处理工艺条件为微波辐照功率400W,辐照时间5min,催化剂加入量60g/L,H_2O_2浓度600mg/L,体系pH>4.在此工艺条件下,水中苯酚的去除率达97.98%.催化剂连续使用20次后苯酚去除率仍达96.34%.表观反应动力学研究表明,在氧化铁催化剂存在的条件下,微波诱导H2O2产生氧化性极强的羟基自由基,整个反应过程可分为微波诱导阶段和催化氧化阶段,两个阶段的氧化过程均符合一级反应动力学规律. 展开更多
关键词 微波诱导氧化工艺 过氧化氢 氧化铁 氧化铝 负载型催化剂 苯酚 废水处理
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高Cu含量MCM-41在苯直接羟基化反应中的催化性能 被引量:23
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作者 蒋斯扬 孔岩 +5 位作者 吴丞 徐铮 朱海洋 王春燕 王军 颜其洁 《催化学报》 SCIE CAS CSCD 北大核心 2006年第5期421-426,共6页
考察了高铜含量(最高达26·0%)且铜原子主要处于中孔骨架的Cu-MCM-41在苯/过氧化氢直接羟基化制备苯酚反应中的催化性能,研究了铜含量、催化剂用量、溶剂种类、反应物摩尔比、温度以及时间等对催化剂活性的影响.结果表明,该催化剂... 考察了高铜含量(最高达26·0%)且铜原子主要处于中孔骨架的Cu-MCM-41在苯/过氧化氢直接羟基化制备苯酚反应中的催化性能,研究了铜含量、催化剂用量、溶剂种类、反应物摩尔比、温度以及时间等对催化剂活性的影响.结果表明,该催化剂在苯直接羟基化反应中具有良好的催化活性,在最佳反应条件下,可使苯转化率达52·9%,苯酚选择性达58·9%,苯酚收率达31·2%,优于文献报道的低铜含量中孔分子筛的催化结果.另外,从反应机理对影响反应的因素进行了初步探讨. 展开更多
关键词 Cu-MCM-41分子筛 过氧化氢 羟基化 苯酚
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含铜过渡金属水滑石类化合物对苯酚过氧化氢羟化的催化作用 被引量:22
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作者 朱凯征 刘持标 +1 位作者 叶兴凯 吴越 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 1997年第9期1530-1533,共4页
合成了一系列二元、三元过渡金属水滑石类化合物,并经XRD、IR进行了表征.苯酚过氧化氢羟化结果表明,含铜水滑石类化合物对该反应有较高的催化活性,并初步提出了反应机理.
关键词 水滑石 苯酚羟化 过氧化氢 催化
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Keggin结构稀土钼钒磷四元杂多配合物的合成、表征及苯酚羟化制苯二酚的催化活性 被引量:15
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作者 林深 郑瑛 +1 位作者 许利闽 王世铭 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2000年第8期1248-1251,共4页
合成了 5种通式为 ( NH4) 1 5 [RE( PMo9V2 O39) 2 ]· x H2 O( RE=La3+ ,Ce3+ ,Gd3+ ,Y3+ ,Yb3+ )的稀土钼钒磷四元杂多配合物 ,并用 IR,UV,XRD,ICP,TG-DTA和 CV等手段对其结构和性能进行了表征 .催化活性实验表明 。
关键词 杂多配合物 稀土 合成 催化活性
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CuZSM-5分子筛上苯酚羟化制苯二酚 被引量:17
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作者 于剑锋 张春雷 +2 位作者 杨宇 吴通好 孙家钟 《催化学报》 SCIE EI CAS CSCD 北大核心 1997年第2期130-134,共5页
在Na2O-SiO2-CuO-H2O体系中以15%TPABr-85%HMDA为模板剂合成了CuZSM-5分子筛,并用XRD,IR及SEM等方法进行了表征,考察了CuZSM-5分子筛催化苯酚与过氧化氢的羟化活性,研究了... 在Na2O-SiO2-CuO-H2O体系中以15%TPABr-85%HMDA为模板剂合成了CuZSM-5分子筛,并用XRD,IR及SEM等方法进行了表征,考察了CuZSM-5分子筛催化苯酚与过氧化氢的羟化活性,研究了催化剂用量、反应温度、反应时间及n(PhOH)/n(H2O2)等对羟化活性的影响. 展开更多
关键词 分子筛 过氧化氢 苯酚 羟化 苯二酚
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均相和非均相Fenton型催化剂催化氧化含酚废水 被引量:60
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作者 何莼 徐科峰 +1 位作者 奚红霞 李忠 《华南理工大学学报(自然科学版)》 EI CAS CSCD 北大核心 2003年第5期51-55,共5页
研究了均相和非均相Fenton型催化剂催化氧化含酚废水 .对均相催化氧化反应进行正交试验和单因数试验 ,确定其氧化降解特定废水的最优化条件 .在Fenton反应机理的基础上 ,探讨了Fe3+ 在均相和非均相条件下的催化氧化机理 ;制备了Fe3+ /... 研究了均相和非均相Fenton型催化剂催化氧化含酚废水 .对均相催化氧化反应进行正交试验和单因数试验 ,确定其氧化降解特定废水的最优化条件 .在Fenton反应机理的基础上 ,探讨了Fe3+ 在均相和非均相条件下的催化氧化机理 ;制备了Fe3+ /人造沸石和Fe3+ /活性炭催化剂 ;进行了非均相催化氧化降解高浓度含酚废水的试验 ;比较了均相和非均相催化氧化反应对苯酚降解率的影响 .结果发现非均相反应能大大提高苯酚降解率 ,使用Fe3+ /活性炭为催化剂时可使苯酚的降解率达到 93.0 2 % . 展开更多
关键词 Fenton型催化剂 过氧化氢 催化湿式氧化 含酚废水
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铁酸镁在苯酚过氧化氢羟基化反应中的催化性能 被引量:14
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作者 张淳 熊春荣 +1 位作者 隆仲华 朱中南 《催化学报》 SCIE CAS CSCD 北大核心 2000年第4期372-374,共3页
A novel catalyst, MgFe 2O 4, for hydroxylation of phenol with hydrogen peroxide was synthesized via coprecipitation method from an aqueous solution containing Fe(NO 3) 3·9H 2O and Mg(NO 3) 2·6H 2O with ammon... A novel catalyst, MgFe 2O 4, for hydroxylation of phenol with hydrogen peroxide was synthesized via coprecipitation method from an aqueous solution containing Fe(NO 3) 3·9H 2O and Mg(NO 3) 2·6H 2O with ammonia. The X ray diffraction peaks of the catalyst show that the as prepared sample has engendered MgFe 2O 4 crystal with spinel structure, which is also confirmed by its IR spectrum. In the hydroxylation of phenol with hydrogen peroxide, MgFe 2O 4 catalyst exhibited high activity after a short induction period. In particular, the addition of a little amount of acetic acid in the reaction liquid can effectively shorten the induction period. Under the same reaction conditions, the diphenol selectivity over MgFe 2O 4 is higher than that over TS 1, furthermore, the reaction time is shortened greatly. The experimental phenomena can be explained by the free radical mechanism. 展开更多
关键词 铁酸镁 苯酚 过氧化氢 羟基化 苯二酚 催化性能
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Dawson结构钨钒磷杂多化合物催化苯酚过氧化氢的羟化作用及其羟化机理 被引量:12
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作者 杨宇 于剑锋 +1 位作者 吴通好 孙家钟 《催化学报》 SCIE EI CAS CSCD 北大核心 1997年第3期230-233,共4页
合成了系列Dawson结构钨钒磷杂多化合物(Cpyr)7+nP2W18-nVnO62(n=1~3),并用IR,NMR等手段对其结构进行了表征.考察了这类杂多化合物对苯酚过氧化氢的羟化活性,探讨了反应机理.
关键词 杂多化合物 苯酚 羟化 苯二酚 催化
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