期刊文献+
共找到343篇文章
< 1 2 18 >
每页显示 20 50 100
Achieving high-efficient photocatalytic persulfate-activated degradation of tetracycline via carbon dots modified MIL-101(Fe)octahedrons 被引量:1
1
作者 Hao Yuan Xinhai Sun +2 位作者 Shuai Zhang Weilong Shi Feng Guo 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第2期298-309,共12页
The synergistic reaction of photocatalysis and advanced oxidation is a valid strategy for the degradation of harmful antibiotic wastewater.Herein,carbon dots(CDs)modified MIL-101(Fe)octahedrons to form CDs/MIL-101(Fe)... The synergistic reaction of photocatalysis and advanced oxidation is a valid strategy for the degradation of harmful antibiotic wastewater.Herein,carbon dots(CDs)modified MIL-101(Fe)octahedrons to form CDs/MIL-101(Fe)composite photocatalyst was synthesized for visible light-driven photocatalytic/persulfate(PS)-activated tetracycline(TC)degradation.The electron spin resonance(ESR)spectra,scavenging experiment and electrochemical analysis were carried out to reveal that the high visible light-driven photocatalytic degradation activity of TC over CDs/MIL-101(Fe)photocatalysts is not only ascribed to the production of free active radicals in the CDs/MIL-101(Fe)/PS system(·OH,·SO_(4-),^(1)O_(2),h^(+)and·O_(2)^(-))but also attributed to the consumption of electrons caused by the PS,which can suppress the recombination of photo-generated carriers as well as strong light scattering and electron trapping effects of CDs.Finally,the possible degradation pathways were proposed by analyzing intermediates via liquid chromatography-mass spectrometry technique.This research presents a rational design conception to construct a CDs/PS-based photocatalysis/advanced oxidation technology with high-efficient degradation activity for the remediation of organic antibiotic pollutant wastewater and for the improvement of carrier transport kinetics of photocatalysts. 展开更多
关键词 Carbon dots MIL-101(Fe) PHOTOCATALYTIC Persulfate activation tetracycline degradation
下载PDF
Mesoporous amorphous FeOOH-encapsulated BiO_(2–x) photocatalyst with harnessing broad spectrum toward activation of persulfate for tetracycline degradation
2
作者 Pengfei Wu Zhaolong Liu +6 位作者 Li Wu Yingkun Zhang Bing Wang Zhanghao Cheng Wenquan Cui Xiangyang Lv Qingling Liu 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2024年第7期235-248,共14页
With the growing concern about the water environment,the advanced oxidation process of persulfate activation assisted by photocatalysis has attracted considerable attention to decompose dissolved organic micropollutan... With the growing concern about the water environment,the advanced oxidation process of persulfate activation assisted by photocatalysis has attracted considerable attention to decompose dissolved organic micropollutants.In this work,to overcome the drawbacks of the photocatalytic activity reduction caused by the photo-corrosion of non-stoichiometric BiO_(2–x),a novel material with amorphous FeOOH in situ grown on layered BiO_(2–x) to form a core-shell structure similar to popcorn chicken-like morphology was produced in two simple and environmentally beneficial steps.Through a series of degradation activity tests of hybrid materials under different conditions,the as-prepared materials exhibited remarkable degradation activity and stability toward tetracycline in the FeOOH@BiO_(2–x)/Vis/PS system due to the synergism of photocatalysis and persulfate activation.The results of XRD,SEM,TEM,XPS,FTIR,and BET show that the loading of FeOOH increases the specific surface area and active sites appreciably;the heterogeneous structure formed by FeOOH and BiO_(2–x) is more favorable to the effective separation of photogenerated carriers.The optimal degradation conditions were at a catalyst addition of 0.7 g·L^(–1),a persulfate concentration of 1.0 g·L^(–1),and an initial pH of 4.5,at which the degradation rate could reach 94.7%after 90 min.The influence of typical inorganic anions on degradation was also examined.ESR studies and radical quenching experiments revealed that·OH,SO_(4)^(-)·,and·O_(2)^(-)were the principal active species generated during the degradation of tetracycline.The results of the 1,10-phenanthroline approach proved that the effect of dissolved iron ions on the tetracycline degradation was limited,and the interfacial reaction that occurs on the active sites on the material's surface was a critical factor.This work provides a novel method for producing efficient broad-spectrum Bismuth-based composite photocatalysts and photocatalytic-activated persulfate synergistic degradation of tetracycline. 展开更多
关键词 Amorphous FeOOH BiO_(2–x) Activated persulfate Photocatalytic tetracycline degradation
下载PDF
Carbon-doped CuFe_(2)O_(4) with C-O-M channels for enhanced Fenton-like degradation of tetracycline hydrochloride: From construction to mechanism
3
作者 Hong Qin Yangzhuo He +9 位作者 Piao Xu Yuan Zhu Han Wang Ziwei Wang Yin Zhao Haijiao Xie Quyang Tian Changlin Wang Ying Zeng Yicheng Li 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第4期732-747,共16页
Carbon-doped copper ferrite(C–CuFe_(2)O_(4))was synthesized by a simple two-step hydrothermal method,which showed enhanced tetracycline hydrochloride(TCH)removal efficiency as compared to the pure CuFe_(2)O_(4) in Fe... Carbon-doped copper ferrite(C–CuFe_(2)O_(4))was synthesized by a simple two-step hydrothermal method,which showed enhanced tetracycline hydrochloride(TCH)removal efficiency as compared to the pure CuFe_(2)O_(4) in Fenton-like reaction.A removal efficiency of 94%was achieved with 0.2 g L^(-1) catalyst and 20 mmol L^(-1) H_(2)O_(2) within 90 min.We demonstrated that 5%C–CuFe_(2)O_(4) catalyst in the presence of H_(2)O_(2) was significantly efficient for TCH degradation under the near-neutral pH(5–9)without buffer.Multiple techniques,including SEM,TEM,XRD,FTIR,Raman,XPS M€ossbauer and so on,were conducted to investigate the structures,morphologies and electronic properties of as-prepared samples.The introduction of carbon can effectively accelerate electron transfer by cooperating with Cu and Fe to activate H_(2)O_(2) to generate·OH and·O_(2)^(-).Particularly,theoretical calculations display that the p,p,d orbital hybridization of C,O,Cu and Fe can form C–O–Cu and C–O–Fe bonds,and the electrons on carbon can transfer to metal Cu and Fe along the C–O–Fe and C–O–Cu channels,thus forming electron-rich reactive centers around Fe and Cu.This work provides lightful reference for the modification of spinel ferrites in Fenton-like application. 展开更多
关键词 Fenton-like reaction CuFe_(2)O_(4) tetracycline hydrochloride degradation
下载PDF
Enhanced degradation of tetracycline by gas-liquid discharge plasma coupled with g-C_(3)N_(4)/TiO_(2)
4
作者 Zhenhai WANG Zikai ZHOU +1 位作者 Sen WANG Zhi FANG 《Plasma Science and Technology》 SCIE EI CAS CSCD 2024年第9期69-78,共10页
Plasma-catalysis is considered as one of the most promising technologies for antibiotic degradation in water.In the plasma-catalytic system,one of the factors affecting the degradation effect is the performance of the... Plasma-catalysis is considered as one of the most promising technologies for antibiotic degradation in water.In the plasma-catalytic system,one of the factors affecting the degradation effect is the performance of the photocatalyst,which is usually restricted by the rapid recombination of electrons and holes as well as narrow light absorption range.In this research,a photocatalyst g-C_(3)N_(4)/TiO_(2) was prepared and coupled with gas-liquid discharge(GLD)to degrade tetracycline(TC).The performance was examined,and the degradation pathways and mechanisms were studied.Results show that a 90%degradation rate is achieved in the GLD with g-C_(3)N_(4)/TiO_(2) over a 10 min treatment.Increasing the pulse voltage is conducive to increasing the degradation rate,whereas the addition of excessive g-C_(3)N_(4)/TiO_(2) tends to precipitate agglomerates,resulting in a poor degradation efficiency.The redox properties of the g-C_(3)N_(4)/TiO_(2) surface promote the generation of oxidizing active species(H2O2,O3)in solution.Radical quenching experiments showed that·OH,hole(h^(+)),play important roles in the TC degradation by the discharge with g-C_(3)N_(4)/TiO_(2).Two potential degradation pathways were proposed based on the intermediates.The toxicity of tetracycline was reduced by treatment in the system.Furthermore,the g-C_(3)N_(4)/TiO_(2) composites exhibited excellent recoverability and stability. 展开更多
关键词 gas-liquid discharge PLASMA-CATALYSIS g-C_(3)N_(4)/TiO_(2) tc degradation
下载PDF
Synthesis plasmonic Bi/Bi VO4 photocatalysts with enhanced photocatalytic activity for degradation of tetracycline(TC) 被引量:1
5
作者 Nianjun Kang Dongbo Xu Weidong Shi 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2019年第12期3053-3059,共7页
In recent years,the excessive use of antibiotics has become a serious problem for human health.BiV04 regarded as one of the most promising visible-light-driven photocatalysts was used to degrade the antibiotics.In thi... In recent years,the excessive use of antibiotics has become a serious problem for human health.BiV04 regarded as one of the most promising visible-light-driven photocatalysts was used to degrade the antibiotics.In this paper,we fabricated Bi/BiV04 plasmonic photocatalysts which enhanced the photocatalytic activity of BiV04 for degradation of tetracycline(TC)antibiotic.The Bi/BiV04 photocatalysts were characterized by X-ray diffraction,X-ray photoelectron spectroscopy,scanning electron microscopy,transmission electron microscopy and high-resolution transmission electron microscopy.In addition,the photocatalytic experiment results show that the 0.04-Bi/BiVO4 sample has the best photocatalytic activity for 2 times than the pure BiV04 photocatalyst.The cycle experiments,after four repetitions of the experiments,showed the sample still maintained a high photocatalytic activity.Finally,the photocatalytic reaction mechanism was also studied by free radical capture experiments and electron paramagnetic resonance spectroscopy. 展开更多
关键词 Bi/BiVO4 PLASMONIC PHOTOCATALYSTS tetracycline(tc) Visible light
下载PDF
Unique electronic structure of Mg/O co-decorated amorphous carbon nitride enhances the photocatalytic tetracycline hydrochloride degradation 被引量:6
6
作者 Xiaolu Wu Min Fu +2 位作者 Peng Lu Qiuyan Ren Cheng Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第5期776-785,共10页
g-C3N4 is a hot visible light photocatalyst. However, the fast recombination of photogenerated electron- hole pairs leads to unsatisfactory photocatalytic efficiencies. In this study, Mg/O co-decorated amorphous carbo... g-C3N4 is a hot visible light photocatalyst. However, the fast recombination of photogenerated electron- hole pairs leads to unsatisfactory photocatalytic efficiencies. In this study, Mg/O co-decorated amorphous carbon nitride (labeled as MgO-CN) with a unique electronic structure was designed and prepared via a combined experimental and theoretical approach. The results showed that the MgO-CN exhibited an increased light absorption ability and promoted charge separation efficiency. The Mg and O co-decoration created a unique structure that could generate localized electrons around O atoms and enhance the reactant activation capacities via the C→O←Mg route. This could dramatically promote the O2 molecule activation on the catalyst surface to generate reactive species (?O2 –/?OH). The optimized MgO-CN exhibited a high photocatalytic activity for the degradation of tetracycline hydrochloride in water, which was five times higher than that of pristine g-C3N4. The present work could provide a new strategy for modifying the electronic structure of g-C3N4 and enhancing its performance for environmental applications. 展开更多
关键词 g-C3N4 Electronic structure Visible light photocatalysis tetracycline hydrochloride degradation Environmental remediation
下载PDF
Preparation of BiOCl0.9I0.1/β-Bi2O3 composite for degradation of tetracycline hydrochloride under simulated sunlight 被引量:6
7
作者 Xiong Ma Kaiyi Chen +5 位作者 Bin Niu Yan Li Lei Wang Jingwei Huang Houde She Qizhao Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第10期1535-1543,共9页
A novel and effective BiOCl0.9I0.1/x%β-Bi2O3 composite catalyst was synthesized through a precipitation method. The structure, morphology, and optical properties of the samples were certified by X-ray diffraction, UV... A novel and effective BiOCl0.9I0.1/x%β-Bi2O3 composite catalyst was synthesized through a precipitation method. The structure, morphology, and optical properties of the samples were certified by X-ray diffraction, UV-Vis diffuse reflectance, scanning electron microscopy, and X-ray photoelectron spectroscopic characterizations. Photocatalytic experiments demonstrated that the synthesized BiOCl0.9I0.1/x%β-Bi2O3 composite catalyst exhibited excellent photocatalytic performance toward the degradation of tetracycline hydrochloride(TCH) under simulated sunlight. Furthermore, the TCH degradation rate of BiOCl0.9I0.1/15%β-Bi2O3 increased by 27.6% and 61.4% compared with those of the pure BiOCl0.9I0.1 and pure β-Bi2O3, respectively. Due to the multiple vacancies and valence states possessed by BiOCl0.9I0.1/x%β-Bi2O3, namely Bi5+, Bi(3-x)+, Bi5+–O, Bi3+–O, I- and I3-, the charge separation in photocatalysis reactions can be effectively promoted. The Mott-Schottky measurements indicate that the conduction band(CB) level of BiOCl0.9I0.1/15%β-Bi2O3 becomes more negative relative to that of BiOCl0.9I0.1, guaranteeing an advantageous effect on the redox ability of the photocatalyst. This study provides a new bright spot for the construction of high-performance photocatalysts. 展开更多
关键词 BiOCl0.9I0.1/β-Bi2O3 degradation tetracycline hydrochloride PHOTOCATALYSIS Simulated sunlight
下载PDF
Degradation of tetracycline in water by gas-liquid plasma in conjunction with rGO-TiO_(2) nanocomposite 被引量:2
8
作者 Xinghao LIU Cheng CHENG +4 位作者 Zimu XU Shuheng HU Jie SHEN Yan LAN Paul K CHU 《Plasma Science and Technology》 SCIE EI CAS CSCD 2021年第11期110-120,共11页
Tetracycline(TC)is an antibiotic mainly used in livestock production and respiratory infection.Traditional methods are not effective in removing TC from solution.In this study,TC was degraded by gas–liquid plasma in ... Tetracycline(TC)is an antibiotic mainly used in livestock production and respiratory infection.Traditional methods are not effective in removing TC from solution.In this study,TC was degraded by gas–liquid plasma in the presence of rGO-TiO_(2)in solution.The rGO-TiO_(2)was prepared by modified hummers and hydrothermal method.The electrical and optical properties of the gas–liquid discharge plasma were studied and the produced long-lived reactive species were analyzed by spectrophotometer.The degradation efficiency of TC was improved by 41.4%after plasma treatment for 12 min in presence of 30 mg l-1 r GO-TiO_(2)compared to that with plasma alone.The degradation efficiency increased with increasing discharge power,but as the initial concentration was increased from 20 to 80 mg l-1,the degradation efficiency of TC decreased.The initial p H had no significant effect on the degradation of TC.The intermediate products were determined by UV–vis spectrophotometry and ESI(+)–MS,and the degradation mechanism was analyzed.The reactive species,including O_(3),·OH,and H_(2)O_(2),etc.,produced in the plasma/catalyst system attracted electron-rich functional groups(amino group,aromatic ring,and double bond).Therefore,the gas–liquid plasma/catalyst system could be an effective and promising method for pharmaceutical wastewater treatment in future. 展开更多
关键词 gas-liquid plasma rGO-TiO_(2) tetracycline degradation mechanism
下载PDF
Colloidal Gold Immunochromatographic Assay for Rapid On-Site Detection of Tetracycline in Seawater 被引量:2
9
作者 LI Haiping MENG Fanping LI Aifeng 《Journal of Ocean University of China》 SCIE CAS CSCD 2023年第4期1129-1138,共10页
Recently increasing concerns from the scientists and public have been paid for seawater pollution due to tetracycline(TC)overuse in maricultural area.However,there are few methods or instruments that can be used for s... Recently increasing concerns from the scientists and public have been paid for seawater pollution due to tetracycline(TC)overuse in maricultural area.However,there are few methods or instruments that can be used for specific and rapid detection of this antibiotic in seawater.In this study,the colloidal gold immunochromatographic assay(CG-ICA)was used to achieve this goal.A commercialized monoclonal antibody against TC(anti-TC mAb)was selected because of its higher sensitivity(half-maximal inhibitory concentration of 2.38μgL^(-1)).The prepared CG particles(average diameter of 20 nm)were used to label anti-TC mAb at pH 8.0.The conjugate pad was formed by spraying the CG-labeled anti-TC mAb on a glass fibre membrane followed by proper dryness.The test pad was made by immobilizing artificial antigen and anti-mouse mAb in the test line and the control line,respectively,in a nitrocellulose membrane.The test strip,assembled with sample pad,conjugate pad,test pad and absorbent pad,could be used to detect TC during seawater sample flowing through these components in turn.The results could be observed by the naked eye in 10min.The visible limit of detection(vLOD)was 20μgL^(-1) for TC in seawater.The CG-ICA test results were in good agreement with those of liquid chromatography-tandem mass spectrometry(LC-MS/MS).The assay also showed that,oxytetracycline(OTC)and chlortetracycline(CTC),as the structural analogues of TC,did not interfere with TC determination.Furthermore,the TC concentration given by test strip could not be affected by the fluctuation of temperature(10℃–30℃),pH(7–9)and salinity(0–40)of seawater.Therefore,CG-ICA is a suitable tool for rapid,on-site,and semi-quantitative detection of TC in seawater. 展开更多
关键词 tetracycline(tc) seawater colloidal gold(CG) immunochromatographic assay SEMI-QUANTITATIVE
下载PDF
活性炭纤维-涂层RuO_(2)钛电解产H_(2)O_(2)及降解TC研究 被引量:1
10
作者 刘建新 姚创 +5 位作者 刘永旋 邓运泉 陈威宇 伦见强 吴文滔 陈宇丹 《广东化工》 CAS 2023年第13期1-3,41,共4页
通过对比活性炭纤维-涂层RuO_(2)钛板、活性炭纤维-石墨板以及石墨板-涂层RuO_(2)钛板三种不同阴阳极组合体系产H_(2)O_(2)的能力。选取以活性炭纤维为阴极,涂层RuO_(2)钛板为阳极电解产H_(2)O_(2)体系为研究对象,考察了不同pH值、电解... 通过对比活性炭纤维-涂层RuO_(2)钛板、活性炭纤维-石墨板以及石墨板-涂层RuO_(2)钛板三种不同阴阳极组合体系产H_(2)O_(2)的能力。选取以活性炭纤维为阴极,涂层RuO_(2)钛板为阳极电解产H_(2)O_(2)体系为研究对象,考察了不同pH值、电解质(Na_(2)SO_(4))浓度和电流密度对产H_(2)O_(2)影响。结果表明,当pH=3、Na_(2)SO_(4)浓度为0.05 mol/L和电流密度6.79 mA/cm^(2),电解180 min时,体系产H_(2)O_(2)浓度可达403.04μmol/L。与此同时,以磁性氧化石墨烯(MGO)作为粒子电极,与活性炭纤维-涂层RuO_(2)钛板电解体系构建三维非均相电芬顿系统,在降解水中TC实验结果表明,该体系可对初始浓度为500 mg/LTC实现较好的去除效果,去除率达93.5%。 展开更多
关键词 原位电解 H_(2)O_(2)浓度 三维电极 氧化降解 盐酸四环素
下载PDF
KOH活化制备铁基生物质炭及其对四环素和环丙沙星的吸附研究
11
作者 聂发辉 李佳诚 +3 位作者 吴钦 刘占孟 徐志威 官坤 《水资源与水工程学报》 CSCD 北大核心 2024年第5期20-30,39,共12页
低代谢程度的抗生素如四环素和环丙沙星会造成较为严重的水体污染,而活性炭对此种污染有一定的吸附作用。活化是改善生物炭吸附特性的主要方法之一。以甘蔗渣为主要研究对象,用KOH为活化剂,以FeCl_(3)·6H 2O为浸渍溶剂,制备了改性... 低代谢程度的抗生素如四环素和环丙沙星会造成较为严重的水体污染,而活性炭对此种污染有一定的吸附作用。活化是改善生物炭吸附特性的主要方法之一。以甘蔗渣为主要研究对象,用KOH为活化剂,以FeCl_(3)·6H 2O为浸渍溶剂,制备了改性生物炭(KFBC),同时制备甘蔗渣生物炭(BC)作为对照。综合多种表征手段分析KOH活化和FeCl_(3)的掺杂对KFBC的结构和理化性质的影响,采用吸附法探究KFBC对溶液中的四环素(TC)或环丙沙星(CIP)的吸附性能和机理。结果表明:KOH活化后会形成更多的碳结构缺陷,影响BC的官能团的种类和数量以及BC的表面电性;FeCl_(3)的掺杂会增强BC的磁性,有利于KFBC的循环利用;吸附反应受pH影响较小,KFBC能够在一个较宽泛的pH范围内进行吸附。KFBC吸附TC或CIP是以化学吸附为主,且是自发、吸热、自由度增加和熵增的过程;KFBC对TC或CIP的理论最大吸附量可达到743和794 mg/g;KFBC的主导机制并非静电吸附,而是以孔隙扩散和π—π作用等为主,氢键和络合作用也发挥了重要作用。 展开更多
关键词 生物炭 碱改性 掺杂改性 四环素 环丙沙星 吸附机制
下载PDF
TiO_(2)/MMT复合材料降解盐酸四环素的研究
12
作者 李涛 李丰川 +2 位作者 吴明慧 黄建秀 李惠娟 《非金属矿》 2024年第1期83-87,共5页
为解决抗生素废水排放带来的环境污染问题,以蒙脱土(MMT)为原料,采用水解法制备TiO_(2)/MMT复合材料,利用扫描电镜(SEM)、X射线衍射(XRD)、傅里叶红外光谱(FT-IR)和X射线光电子能谱(XPS)对TiO_(2)/MMT进行物相表征。以盐酸四环素(TC)为... 为解决抗生素废水排放带来的环境污染问题,以蒙脱土(MMT)为原料,采用水解法制备TiO_(2)/MMT复合材料,利用扫描电镜(SEM)、X射线衍射(XRD)、傅里叶红外光谱(FT-IR)和X射线光电子能谱(XPS)对TiO_(2)/MMT进行物相表征。以盐酸四环素(TC)为目标降解分子,考察了所制备的复合材料对TC的降解性能,并采用紫外-可见分光光谱(UV-vis)跟踪检测TC降解过程。物相表征表明,TiO_(2)均匀分散在MMT的表面;TiO_(2)/MMT中TiO_(2)为锐钛矿相。TiO_(2)/MMT回收样检测到N元素存在。活性数据表明,30%TiO_(2)/MMT(400℃,2 h)复合材料具有最优光催化降解TC性能,在紫外光下对100 mg/L TC的降解率达87.64%,优于纯TiO_(2)(68.74%)和纯MMT(72.22%)。循环试验6次后,催化剂对TC降解率仍达到75%,表明TiO_(2)/MMT对TC具有较高的降解活性和化学稳定性。·O_(2)^(-)和h^(+)是TiO_(2)/MMT光催化降解盐酸四环素的主要活性物质。 展开更多
关键词 TiO_(2) MMT 光催化降解 盐酸四环素
下载PDF
层状锌铝双金属氧化物的制备及其吸附-光催化性能
13
作者 章萍 赵晨晨 +5 位作者 崔潇匀 谢冰 刘依涵 林海玉 张佳乐 谌宇楠 《无机化学学报》 SCIE CAS CSCD 北大核心 2024年第10期1965-1974,共10页
采用前驱体煅烧法制备具有吸附-光催化双功能的层状锌铝双金属氧化物(LDOs)。通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、紫外可见漫反射光谱(UV⁃Vis DRS)、扫描电子显微镜(SEM)等表征探究了双金属比例、煅烧温度对其吸附-光催化... 采用前驱体煅烧法制备具有吸附-光催化双功能的层状锌铝双金属氧化物(LDOs)。通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、紫外可见漫反射光谱(UV⁃Vis DRS)、扫描电子显微镜(SEM)等表征探究了双金属比例、煅烧温度对其吸附-光催化降解四环素(TC)性能的影响。结果表明,当Zn、Al物质的量之比为2∶1,煅烧温度为400℃时,可形成具有优异吸附-光催化活性的Zn_(2)Al_(1)@LDO_(400)。吸附实验表明,Zn_(2)Al_(1)@LDO_(400)对TC是化学吸附限制的非均相单分子层吸附,且高温利于吸附。利用自由基猝灭实验结合电子顺磁共振(EPR)测试证实光生空穴(h^(+))、羟基自由基(·OH)、超氧自由基(·O_(2)^(-))作为活性物种参与TC的协同降解。 展开更多
关键词 双金属氧化物 四环素 吸附-光催化 协同降解
下载PDF
ZnS/BiVO_(4)纳米复合材料的制备及其光催化性能研究 被引量:1
14
作者 冯好胜 钟译瑱 +2 位作者 张奇晰 赵燕熹 黄涛 《现代化工》 CAS CSCD 北大核心 2024年第6期94-100,106,共8页
以BiVO_(4)纳米棒为载体,采用室温共沉淀法制备了BiVO_(4)负载ZnS量子点的纳米复合材料,利用SEM、TEM、XRD和FT-IR等对其组成、结构、形貌进行表征;以四环素(TC)为污染物,考察了ZnS/BiVO_(4)复合材料的光催化性能。结果表明,与纯ZnS和Bi... 以BiVO_(4)纳米棒为载体,采用室温共沉淀法制备了BiVO_(4)负载ZnS量子点的纳米复合材料,利用SEM、TEM、XRD和FT-IR等对其组成、结构、形貌进行表征;以四环素(TC)为污染物,考察了ZnS/BiVO_(4)复合材料的光催化性能。结果表明,与纯ZnS和BiVO_(4)相比,ZnS/BiVO_(4)复合材料对TC光催化降解的性能显著增强,其中,Zn/Bi摩尔比为2/1的ZnS/BiVO_(4)-2/1样品对TC的降解效果最佳,1 h内TC(20 mg/L)清除率达到83.5%。自由基猝灭实验证实光生空穴(h^(+))、超氧自由基(·O_(2)^(-))及羟基自由基(·OH)均在ZnS/BiVO_(4)-2/1样品光催化降解TC过程中发挥作用,初步阐述了ZnS/BiVO_(4)-2/1光催化TC降解的Z型异质结机理。 展开更多
关键词 ZNS BiVO_(4) 四环素 光催化 降解
下载PDF
硫化纳米零价铁活化过二硫酸盐降解废水中四环素 被引量:1
15
作者 叶秋月 胡正春 +6 位作者 王紫宜 胥雯 赵施怡 邓旭盈 郭明浩 郭娜 廖兵 《工程科学与技术》 EI CAS CSCD 北大核心 2024年第4期35-45,共11页
硫化零价铁(S-nZVI)因其电子传递效率高、选择性好,近年来在水处理领域应用广泛。将S-nZVI与高级氧化技术结合,可发挥材料优异的催化性能,实现对污染物的高效降解。本文以硫脲为硫源制备高活性S-nZVI,构建S-nZVI活化过二硫酸盐(PDS)高... 硫化零价铁(S-nZVI)因其电子传递效率高、选择性好,近年来在水处理领域应用广泛。将S-nZVI与高级氧化技术结合,可发挥材料优异的催化性能,实现对污染物的高效降解。本文以硫脲为硫源制备高活性S-nZVI,构建S-nZVI活化过二硫酸盐(PDS)高级氧化体系实现对四环素(TC)的高效降解。采用扫描电子显微镜(SEM)、X射线衍射(XRD)、比表面积(BET)、X射线光电子能谱仪(XPS)等表征方法分析S-nZVI的组成结构和表面形貌,考察硫铁物质的量的比(S/Fe)、硫化时间、S-nZVI投加量、PDS浓度、溶液初始pH和共存离子对TC降解的影响作用,通过活性物种淬灭实验和电子顺磁共振实验(EPR)探究自由基和非自由基活性物质对TC的降解作用,利用液相色谱-质谱联用(LC-MS)分析TC降解的可能路径。结果表明:纳米零价铁(nZVI)经硫化改性后,比表面积增大,Fe和S均匀地分布在材料表面;S/Fe对TC降解的影响作用较小,TC降解率与S-nZVI投加量和PDS浓度呈正相关,但随着硫化时间增加呈现降低趋势;S-nZVI/PDS体系在较宽pH范围(pH=5~9)内均具有较优的TC降解效果;反应溶液中存在不同阴离子时,TC降解率受到不同程度抑制作用,其中HCO_(3)^(-)抑制作用最为显著;当S/Fe为0.028、硫化时间为2h、S-nZVI投加量为1g/L、PDS浓度为2mmolL,不调节初始溶液pH时,反应120min后TC降解率可达94.6%;S-nZVI/PDS体系的活性物种除常见自由基(SO_(4)^(·-)和HO^(·))外,还包括非自由基活性物质Fe(Ⅳ),但Fe(Ⅳ)对TC的降解作用较小;TC降解主要通过特定官能团裂解和开环反应进行,最终氧化降解成CO_(2)和H_(2)O。 展开更多
关键词 硫化纳米零价铁 过二硫酸盐 四环素 影响因素 降解机理
下载PDF
PMS协同Ce改性BiOBr材料光催化降解四环素 被引量:1
16
作者 李文涛 黄雪咪 +5 位作者 钟文祥 黄芳 杨惠彬 郭建宁 肖峰 钟润生 《环境保护科学》 CAS 2024年第1期155-162,共8页
采用溶剂热合成法制备Ce(Ⅲ)改性BiOBr催化剂(Ce/Bi摩尔比0.1%~2%),通过XRD、SEM-mapping、XPS、UV-Vis等手段对其结构进行表征分析;以四环素为目标污染物,首次提出构建PMS/Ce(Ⅲ)改性BiOBr光催化体系降解四环素,考察催化剂种类、催化... 采用溶剂热合成法制备Ce(Ⅲ)改性BiOBr催化剂(Ce/Bi摩尔比0.1%~2%),通过XRD、SEM-mapping、XPS、UV-Vis等手段对其结构进行表征分析;以四环素为目标污染物,首次提出构建PMS/Ce(Ⅲ)改性BiOBr光催化体系降解四环素,考察催化剂种类、催化剂投加量、PMS摩尔浓度和p H等因素对反应体系降解四环素效果的影响。结果表明:Ce(Ⅲ)和Bi(Ⅲ)发生同晶置换,使得Ce(Ⅲ)改性BiOBr的最大吸收波长出现蓝移,提高光生电子和空穴的分离效率;PMS协同Ce(Ⅲ)改性BiOBr光催化降解四环素最佳条件:Ce与Bi的摩尔比为1%,投加量为1.0 g/L,PMS浓度为0.3 mmol/L,pH=9;四环素降解过程中,反应体系内主要活性物种为空穴,其贡献远高于硫酸根自由基和单线态氧。经重复利用实验证实,Ce改性BiOBr材料结构具有良好的稳定性。 展开更多
关键词 Ce改性BiOBr 过一硫酸盐 光催化降解 四环素 活性物种
下载PDF
正弦交流电芬顿法去除废水中四环素的试验研究 被引量:1
17
作者 易师 周益辉 +2 位作者 雷细平 余刚 徐涛 《工业用水与废水》 CAS 2024年第2期31-36,共6页
正弦交流电芬顿法(SAEF)是一种新型的电芬顿技术。为了探讨SAEF去除废水中四环素(TC)的效能和机理,分别考察了电流密度、初始pH值、电导率和H_(2)O_(2)投加量等参数对TC废水处理效果的影响;探究了SAEF处理TC废水的氧化降解过程和动力学... 正弦交流电芬顿法(SAEF)是一种新型的电芬顿技术。为了探讨SAEF去除废水中四环素(TC)的效能和机理,分别考察了电流密度、初始pH值、电导率和H_(2)O_(2)投加量等参数对TC废水处理效果的影响;探究了SAEF处理TC废水的氧化降解过程和动力学机制。结果表明:使用SAEF对初始质量浓度为100 mg/L的TC废水进行处理,在电流密度为0.694 mA/cm^(2),电导率为1075μS/cm,30%H_(2)O_(2)投加量为1.17 mL/L,初始pH值为3.0,反应时间为120 min的条件下,TC和COD去除率分别达94.87%和82.42%。SAEF处理过程中,TC的共轭结构首先被破坏,生成中间产物,最终被转变为无机物,在最优条件下的TC降解过程遵循二级动力学模型。 展开更多
关键词 正弦交流电 电芬顿 四环素 氧化降解 动力学研究
下载PDF
MOFs材料负载的钴铁尖晶石活化过一硫酸盐降解四环素
18
作者 王祥 杨娜 +4 位作者 孙永利 姜斌 肖晓明 张龙飞 张吕鸿 《化学工业与工程》 CAS CSCD 北大核心 2024年第3期170-178,共9页
通过简单的水热法成功制备了钴铁尖晶石和MOFs材料耦合的磁性功能催化剂CoFe_(2)O_(4)/UiO-66-NH2(CF/U6N),用于活化过一硫酸盐降解水中的四环素(TC)。由于负载后CoFe_(2)O_(4)活性组分分散性的提高和与载体之间的相互作用增强,CF/U6N... 通过简单的水热法成功制备了钴铁尖晶石和MOFs材料耦合的磁性功能催化剂CoFe_(2)O_(4)/UiO-66-NH2(CF/U6N),用于活化过一硫酸盐降解水中的四环素(TC)。由于负载后CoFe_(2)O_(4)活性组分分散性的提高和与载体之间的相互作用增强,CF/U6N表现出良好的催化活性和稳定性,在30 min内对TC降解效率可达93.2%。5次循环后,对TC的去除率仍保持在80%以上。同时CF/U6N功能催化剂可适用于较宽的pH值范围(3~9),在无机阴离子共存条件下对TC降解也具有较高的催化活性。猝灭实验和电子顺磁光谱表明TC的降解过程涉及自由基和非自由基路径,且硫酸根自由基和单线态氧均在TC降解过程中起到重要作用。 展开更多
关键词 钴铁尖晶石 过一硫酸盐 四环素 降解 活性氧物种
下载PDF
Bio-FeMnCeO_(x)活化PMS降解四环素效能与机制
19
作者 刘梦凡 王华伟 +3 位作者 王亚楠 张艳茹 蒋旭彤 孙英杰 《化工进展》 EI CAS CSCD 北大核心 2024年第6期3492-3502,共11页
鉴于生物合成材料在水环境修复中成本低、环境友好、高效等优势,制备了Ce掺杂生物铁锰氧化物(Bio-FeMnCeO_(x)),以盐酸四环素(TC)为目标污染物,研究了Bio-FeMnCeO_(x)制备参数(Ce剂量、培养时间及样品处理方式等)和工艺条件(pH、PMS浓度... 鉴于生物合成材料在水环境修复中成本低、环境友好、高效等优势,制备了Ce掺杂生物铁锰氧化物(Bio-FeMnCeO_(x)),以盐酸四环素(TC)为目标污染物,研究了Bio-FeMnCeO_(x)制备参数(Ce剂量、培养时间及样品处理方式等)和工艺条件(pH、PMS浓度、Bio-FeMnCeO_(x)剂量等)对Bio-FeMnCeO_(x)活化PMS降解TC的影响。通过自由基猝灭实验和电子顺磁共振(EPR)分析TC降解的主要活性氧物质种类和贡献率,推测了TC的降解路径和降解机制,验证了Bio-FeMnCeO_(x)的循环稳定性。结果表明:①通过生物合成法成功制备了Bio-FeMnCeO_(x),将其用于活化PMS降解TC具有良好的催化活性,在pH为11.0、PMS浓度200mg/L、Bio-FeMnCeO_(x)剂量为100mg/L、反应时间为60min时,TC的降解效率可达93.75%;②通过自由基猝灭和EPR鉴定的实验发现,Bio-FeMnCeO_(x)/PMS体系主要的活性物质为·SO_(4)^(-)和^(1)O_(2);(3)Bio-FeMnCeO_(x)具有良好的实验稳定性,重复使用8次后,TC的降解效率仍高达75.71%。该研究的发现为抗生素废水治理提供了新的催化技术路线。 展开更多
关键词 复合材料 废水 四环素 降解 自由基
下载PDF
水环境四环素类抗生素降解技术研究进展 被引量:1
20
作者 李希冉 郭梦晗 +2 位作者 李欣怡 祁义函 赵霞 《化学工程师》 CAS 2024年第5期69-72,102,共5页
本文对近10年水体中抗生素降解的相关文献进行计量分析,关注了化工行业制药废水中抗生素降解研究重点的转变趋势,并着重介绍了四环素类抗生素的基本性质,分析了四环素类抗生素的来源与检出水平。对排放到自然水体中四环素类抗生素废水... 本文对近10年水体中抗生素降解的相关文献进行计量分析,关注了化工行业制药废水中抗生素降解研究重点的转变趋势,并着重介绍了四环素类抗生素的基本性质,分析了四环素类抗生素的来源与检出水平。对排放到自然水体中四环素类抗生素废水降解技术的应用研究进行了综述,包括物理法、化学法、生物法。此外,针对水体中四环素类抗生素不同降解技术分析了可能存在的问题及其实用性相关的挑战,并对其未来发展方向进行了展望。 展开更多
关键词 四环素类抗生素 文献计量分析 水体污染 降解技术
下载PDF
上一页 1 2 18 下一页 到第
使用帮助 返回顶部