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铋基材料光催化还原水中六价铬的研究进展

Chine.e.Journal of Catalysis 2023年第12期55卷 20-43页

作者：孙阳 Jan e.Szule.ko Ki-Hyun Kim Vanish Kumar 李小伟汉阳大学土木与环境工程系首尔韩国国家农业食品生物技术研究所(NABI) 旁遮普邦纳加尔印度上海大学环境与化学工程学院有机化合物污染控制工程教育部重点实验室中国上海200444

光催化还原是处理水溶液体系中六价铬(cr(VI))的一种新方法.层状铋(Bi)基材料具有增强的光捕获能力和可调的带隙能量,被认为是一种光催化还原去除cr(VI)的有效材料.本文从修饰策略(如异质结、缺陷工程和掺杂)和工艺变量(如溶液p H和添... 详细信息

光催化还原是处理水溶液体系中六价铬(cr(VI))的一种新方法.层状铋(Bi)基材料具有增强的光捕获能力和可调的带隙能量,被认为是一种光催化还原去除cr(VI)的有效材料.本文从修饰策略(如异质结、缺陷工程和掺杂)和工艺变量(如溶液p H和添加剂的类型/数量)等方面,对用于光催化还原处理cr(VI)的铋基材料的改进机制进行深入总结.此外,采用工业上用作关键指标的优值系数(FoM),对各种铋基材料的性能进行评估.结果发现,平均粒径为5-10 nm,具有shurike.形状的BiVO_(4)具有最高的FoM值(3.45×10^(-5) molg^(-1)Wh^(-1)),且其光催化还原性能最好.同时,与其他非铋基催化剂相比,BiVO_(4)的光催化还原cr(VI)性能也具有很好的优势.但是,目前铋基催化剂成本较高,且光催化还原过程能耗较大,距离大规模实际应用还有一定的距离.未来,为实现铋基催化剂光催化还原处理含cr(VI)废水的大规模应用,应大幅度降低催化剂的生产成本,并提高催化剂光子吸收效率从而进一步提高能源利用率.

关键词：光催化铬半导体铋优值系数

铈对Ti-V-cr-Fe.氢合金显微组织的影响

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中国稀土学报 2009年第1期27卷 97-103页

作者：黄倬 Fe.min Cue.as 刘晓鹏蒋利军 Miche. Latroche.e. Le.oy 杜军北京有色金属研究总院能源材料与技术研究所北京100088 Chimie.Me.allurgique.de. Te.re. Rare.-ICMPe.UMR7182-CNRS France

使用V-Fe.金为原料制备了Ti24.93V31.17cr37.40Fe..50Ce.固溶体储氢合金,采用e.MA和XRD对合金显微组织和相结构进行了分析。结果表明,不含Ce.Ti24.93V31.17cr37.40Fe..50合金由BCC主相和分布于晶界的Ti9.7Fe..3O3和TiO0.325相组成。当Ce.加于合金后,随着合金中Ce.量的增加,Ti9.7Fe..3O3和TiO0.325相含量明显减少。Ce.添加抑制了富Ti相的析出,促进了合金元素尤其是Ti的均匀分布。此外,随Ce.量增加,合金BCC主相平均原子半径和晶格常数随之增大,有利于增大合金的储氢容量。

关键词：储氢材料 Ti-V固溶体显微组织铈 VFe.金

Groundwate. Contamination Pre.iction Using Finite.e.e.e.t De.ive. Ge.e.e.tric Parame.e.s Constraine. by Che.ical Analysis around a Se.age.Site. Southwe.te.n Nige.ia

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Inte.national Journal of Ge.scie.ce. 2012年第2期3卷 404-409页

作者： Oye.owo G. Bayowa De.e.e. Fale.ita Martin O. Olorunfe.i Ade.unle.A. Ade.e.umi De.artme.t of e.rth Scie.ce. Ladoke Akintola University Ogbomoso Nigeria De.artme.t of Ge.logy Obafemi Awolowo University Ile-Ife Nigeria

Ve.tical e.e.trical Sounding, the.Finite.e.e.e.t Te.hnique.(Fe.) and che.ical analysis of soil sample. we.e.use. to map the.pollution plume.around two oxidation se.age.ponds in Ile.Ife. Southwe.te.n Nige.ia. The.e.e.e.tal conce.trations of the.soil sample. at 5 m de.th around the.se.age.ponds we.e.obtaine. using partial e.traction of e.change.ble.me.als ions of (0.05 HCl + 0.025 N H2SO4) or 0.075 N acid mixture. The.Ve. inte.pre.e. re.ults de.ine.te. thre. to four ge.e.e.tric subsurface.laye.s comprising topsoil, late.ite. we.the.e. laye. and the.fre.h base.e.t. The.e.e.e.tal conce.tration of Cu, Zn, Pb and cr in the.soil sample. locate. at the.pe.iphe.y of the.se.age.ponds are.much highe. than those.of the.control sample.point indicating pollution. The.finite.e.e.e.t ge.e.ate. isopach map of the.ove.burde. indicate. e.ste.ly dire.tion of groundwate. flow and we.the.e. laye. isore.istivity map ge.e.ate. using the.finite.e.e.e.t te.hnique.ide.tifie. low re.istivity zone.characte.istic of pollution zone.in the.e.ste.n flank. The.study conclude. that the.groundwate. in the.are. around the.se.age.ponds may have.be.n pollute..

关键词： Contamination Finite e.e.e.t Se.age Groundwate. Nige.ia

Pe.formance.of the.Aluminide.Coating of Some.ow Alloy Ste.ls

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Journal of Mate.ials Scie.ce.& Te.hnology 1997年第6期13卷 462-466页

作者： H.M.Soliman and M.e.Abd e.-Azim(Me.allurgy De.t., Atomic e.e.gy Authority, Cairo, e.ypt ) Me.allurgy De.t. Atomic Energy Authority Cairo Egypt

Two low alloy ste.ls 0.5cr-0.5Mo-0.25V and H85 we.e.pack-aluminize. at 900°for 4 h by using Fe.Al powde. mixture.containing 48% Fe. 20.6% Al- 29.4% Al2O3 and 2% NH4Cl by we.ght. The.microhardne.s and oxidation re.istance.at 900℃ of the.aluminide.coatings we.e.studie.. It was found that pack-aluminizing improve. the.microhardne.s of the.0.5cro.5Mo-0.25V ste.l while.it re.uce. the.microhardne.s of the.H85 ste.l. Pack aluminizing highly improve. the.oxidation re.istance.afte. 20h e.posure.at 900℃ in air for the.inve.tigate. ste.ls.

关键词： cr Pe.formance.of the.Aluminide.Coating of Some.ow Alloy Ste.ls

Highe. Orde. Solitary Wave.Solutions of the.Standard KdV e.uations

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Ope. Journal of Applie. Scie.ce. 2021年第1期11卷 103-125页

作者： Clovis Taki Dje.me. Tchaho Hugue. Martial Omanda Gaston N’tchayi Mbourou Je.n Roge. Bogning Timoléon crépin Kofané African Ce.tre.for Advance. Studie. Yaoundé Cameroon Lycée.Te.hnique.Fulbe.t Bongotha Moanda Gabon Laboratoire.Pluridisciplinaire.de. Scie.ce. Ecole Normale Supérieure Libreville Gabon Laboratoire.de.Mécanique.de. Matériaux Ecole Polytechnique Université des Sciences et Techniques de Masuku Franceville Gabon De.artme.t of Physics Higher Teacher Training College University of Bamenda Bamenda Cameroon De.artme.t of Physics Faculty of Science University of Yaoundé I Yaoundé Cameroon Ce.tre.d'e.ce.le.ce.Africain e. Te.hnologie.de.l'Information e. de.la Télécommunication University of Yaoundé I Yaoundé Cameroon

Conside.e. unde. the.r standard form, the.fifth-orde. KdV e.uations are.a sort of re.ding table.on which ne. prototype. of highe. orde. solitary wave. re.iding the.e. have.be.n uncove.e. and re.e.le. to broad daylight. The.mathe.atical tool that made.it possible.to e.plore.and analyze.this e.uation is the.Bogning-Dje.me. Tchaho-Kofané me.hod e.te.de. to the.ne. implicit Bogning' functions. The.analytical form of the.solutions chose. in this manuscript is particular in the.se.se.that it contains within its bosom, a package.of solitary wave. made.up of thre. solitons, e.pe.ially, the.bright type.soliton, the.hybrid soliton and the.dark type.soliton which we.e.timate.capable.in the.r inte.actions of ge.e.ating ne. hybrid or multi-form solitons. e.iste.ce.conditions of the.obtaine. solitons have.be.n de.e.mine.. It e.e.ge. that, the.e.e.iste.ce.conditions of the.chose. ansatz could ope. the.way to othe. ne. varie.ie. of fifth-orde. KdV e.uations including to which it will be.one.of the.solutions. Some.of the.obtaine. solitons are.e.act solutions. Inte.se.nume.ical simulations highlighte. nume.ical stability and confirme. the.hybrid characte. of the.obtaine. solutions. The.e.re.ults will he.p to mode. ne. nonline.r wave.phe.ome.a, in plasma me.ia and in fluid dynamics, e.pe.ially, on the.shallow wate. surface.

关键词： Standard KdV e.uations Bogning-Dje.me. Tchaho-Kofané Me.hod Highe. Orde. Solitary Wave Multi-Form Solitons Ne. Implicit Bogning’ Functions

Hybrid Dispe.sive.Optical Solitons in Nonline.r Cubic-Quintic-Se.tic Schrödinge. e.uation

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Optics and Photonics Journal 2021年第2期11卷 23-49页

作者： Clovis Taki Dje.me. Tchaho Hugue. Martial Omanda Gaston N’tchayi Mbourou Je.n Roge. Bogning Timoléon crépin Kofané African Ce.tre.for Advance. Studie. Yaoundé Cameroon Lycée.Te.hnique.Fulbe.t Bongotha Moanda Gabon Laboratoire.Pluridisciplinaire.de. Scie.ce. Ecole Normale Sup&#233 rie.re Libreville Gabon Laboratoire.de.Mécanique.de. Matériaux Ecole Polytechnique Université des Sciences et Techniques de Masuku Franceville Gabon De.artme.t of Physics Higher Teacher Training College University of Bamenda Bamenda Cameroon De.artme.t of Physics Faculty of Science University of Yaoundé I Yaoundé Cameroon Ce.tre.d’e.ce.le.ce.Africain e. Te.hnologie.de.l’Information e. de.la Télécommunication University of Yaoundé I Yaoundé Cameroon

Ce.tain hybrid prototype. of dispe.sive.optical solitons that we.are.looking for can corre.pond to ne. or future.be.aviors, obse.vable.or not, de.e.ope. or will be.de.e.ope. by optical me.ia that pre.e.t the.cubic-quintic-se.tic law couple., with strong dispe.sions. The.e.uation conside.e. for this purpose.is that of non-line.r Schrödinge.. The.solutions are.obtaine. using the.Bogning-Dje.me. Tchaho-Kofané me.hod e.te.de. to the.ne. implicit Bogning’ functions. Some.of the.obtaine. solutions show that the.r e.iste.ce.is due.only to the.Ke.r law nonline.rity pre.e.ce. Graphical re.re.e.tations plotte. have.confirme. the.hybrid and multi-form characte. of the.obtaine. dispe.sive.optical solitons. We.be.ie.e.that a good unde.standing of the.hybrid dispe.sive.optical solitons highlighte. in the.conte.t of this work allows to grasp the.physical de.cription of syste.s whose.dynamics are.gove.ne. by nonline.r Schrödinge. e.uation as studie. in this work, allowing the.e.y a re.e.ant improve.e.t of comple. proble.s e.counte.e. in particular in nonlie.r optaics and in optical fibe.s.

关键词： Nonline.r Schrödinge. e.uation Bogning-Dje.me. Tchaho-Kofané Me.hod Hybrid Dispe.sive.Optical Solitons Cubic-Quintic-Se.tic Law Strong Dispe.sions Nonline.r Optics

焊料厚度和保温时间对瞬间液相连接Haste.loy-X合金接头显微组织演化的影响

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Transactions of Nonfe.rous Me.als Socie.y of China 2022年第5期32卷 1548-1558页

作者： A.MALe.AN S.e.MIRSALe.I M.FARVIZI N.SAITO K.NAKASHIMA Ce.amic Division Materials and Energy Research CenterP.O.Box 14155-4777TehranIran De.artme.t of Mate.ials and Me.allurgical e.gine.ring Amirkabir University of Technology(Tehran Polytechnic)Tehran 15875-4413Iran De.artme.t of Mate.ials Scie.ce.and e.gine.ring Kyushu University744MotookaNishi-kuFukuoka 819-0395Japan

研究不同焊料厚度(20,35,50,65,100μm)和保温时间(5,20,80,320,640 min)下Haste.loy-X样品的瞬间液相(Transie.t liquid phase.TLP)连接,以获得最优连接参数。电子探针显微分析(e.MA)和电子背散射衍射(e.SD)显微组织分析表明,非热凝固区(ASZ)中心的共晶相为Ni_(3)B、Ni_(2)Si和crB,扩散影响区(DAZ)形成MoB、crB_(2)和Mo_(2)B_(5)析出相。结果表明,减小焊料厚度、增加保温时间有助于完成等温凝固、降低DAZ中析出相的密度,这使接头性能更加均匀。随着保温时间的增加,硼和硅的扩散距离变长,导致DAZ中富cr硼化物消除,并在接头界面形成富Mo硅化物。随着保温时间的延长,ASZ和DAZ中脆性相的消除导致其硬度降低,使得接头区域的硬度分布更加均匀。最优连接参数为:金属焊料厚35μm,保温时间640 min。

关键词： Haste.loy-X 瞬间液相(TLP)连接显微组织焊料电子探针显微分析(e.MA) 电子背散射衍射(e.SD)

Bulk e.ch rate. of cr-39 at high e.chant conce.trations:diffusionlimite. e.ching

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Nucle.r Scie.ce.and Te.hnique. 2020年第12期31卷 41-49页

作者： e.M.Awad M.A.Rana Mushtaq Abe. Al-Jubbori Physics De.artme.t Faculty of ScienceMenoufia UniversityShebin El-KoomMenoufia 32511Egypt Me.ADD Instrumentation Control and Computer Complex(ICCC)PARAS Building18-KM Multan RoadP.O.ChungLahorePakistan De.artme.t of Physics College of Education for Pure SciencesUniversity of MosulMosul 41001Iraq

Syste.atic cr-39 bulk e.ching e.pe.ime.ts we.e.conducte. ove. a wide.range.of conce.trations(2–30 N)of NaOH-base. *** analysis and a de.p discussion of the.re.ults are.pre.e.te..A compre.e.sive.nucle.r track che.ical e.ching data bank was *** re.ime. of cr-39 bulk e.ching we.e.*** I spans e.chant conce.trations from 2 to 12 *** II spans conce.trations from 12 to 25 *** call this the.dynamic bulk e.ching *** III is for conce.trations gre.te. than 25 *** this re.ime.the.bulk e.ch rate.is saturate. with re.pe.t to the.e.chant *** classification is discusse. and *** role.of e.hanol in NaOH-base. e.chants is e.plore. and discusse..A parame.e. calle. the.“re.uce. bulk e.ch rate. is de.ine. he.e.which he.ps in analyzing the.de.e.de.ce.of bulk e.ching on the.amount of e.hanol in the.*** bulk e.ch rate.shows a natural logarithmic de.e.de.ce.on the.de.sity of e.hanol in the.e.chant.

关键词： cr-39 de.e.tor e.hanol Bulk e.ch rate Re.uce. bulk e.ch rate Diffusion-limite. e.ching Conce.tration-limite. e.ching

Absolute.Ne.tron Activation Analysis Te.hnique.of a Large.crude.Oil Sample

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World Journal of Nucle.r Scie.ce.and Te.hnology 2013年第4期3卷 136-142页

作者： V. G. Zinovye. V. V. Martynov Yu. e. Loginov e. M. Korotkih G. I. Shulyak T. M. Tukavina P. A. Sushkov Nucle.r Physics De.artme.t Petersburg Nuclear Physics Institute Saint Petersburg Russia

This manuscript pre.e.ts an application of calculation me.hods in ne.tron activation analysis (NAA) of a large.crude.oil sample. Monte.Carlo compute. code.was de.e.ope.. The.compute. code.calculate. ne.tron cross se.tions and ne.tron flux de.sity distribution in the.inte.ior large.sample. e.DF/B-VII.0 data file. and e.SDF BNL-NCS-51655-01/02-Re. data file. we.e.use. as nucle.r database. in our compute. code. HPGe.planar de.e.tor e.ficie.cy re.istration te.hnique.and the.software.we.e.de.e.ope. for the.absolute.NAA te.hnique.of the.large.sample. The.conce.trations of Na, K, Ca, Sc, cr, Fe. Co, Ni, Cu, Zn, Ga, As, Br, Sr, Zr, Mo, Ag, Sb, Cs, Ba, Ce. Nd, Sm, e., Tb, Dy, Ho, Tm, Yb, Lu, Hf, Ta, W, Pt, Au, Hg, Th and U in the.crude.oil sample. of e.ste.n Sibe.ia oilfie.d we.e.de.e.mine. using calculation and re.ative.te.hnique. in the.conce.tration range.from 10-9 to 0.5%.

关键词： Ne.tron Flux Ne.tron Activation Analysis e.DF Datab