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Engineering of efficient vis.ble light photocatalys.s.Ti_(1-x+y)Cu_(x)La_(y)O_(2)(x=0.03;y=0,0.005,0.01) compos.tions

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Journal of Rare Earths 2024年第3期42卷 497-505,I0003页

作者： s.m.Yakout A.m.Yous.ef Inorganic Chemis.ry Department National Research Centre(NRC)El Buhouth StDokkiCairo12622Egypt

In dye-photocatalys.s. widening the wavelengths.abs.rption range of catalys.s.as.well as.aborting the recombination of the photoexcited charge carriers.electrons.holes.pairs. are of paramount *** the current s.udy, we report the photocatalytic characteris.ics.of four compos.tions.compos.d of TiO_(2),Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.for two harmful dyes.Congo red and methylene blue). The X-ray diffraction technique verified the configuration of mixed anatas. and rutile phas.s.in pure TiO_(2)and Ti_(0.97)Cu_(0.03)O_(2)powders.while Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.pos.es. anatas. phas. only. The changes.of the band gap s.ructure and dimens.ons.of the unit cell volume of TiO_(2)confirm the s.bs.itution of Ti^(4+)s.tes.by Cu^(2+)and La^(3+)ions. Remarkable widening of wavelengths.abs.rption with formation of long abs.rption tails.were found in TiO_(2)(3.13 e V) through ins.rtion of La^(3+)plus.Cu^(2+)ions. Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)s.mples.exhibit a vis.ble light band gap of 2.3 and 2.7 e V, res.ectively. Bas.d on s.m images. incorporation of Cu^(2+)and La^(3+)ions.influences.the s.rface morphology of TiO_(2). The res.lting Ti_(0.97)Cu_(0.03)O_(2), Ti_(0.965)Cu_(0.03)La_(0.005)O_(2)and Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)powders.pres.nt enhanced photocatalytic activity towards.Congo red dye degradation compared to pure one under natural s.lar s.ectrum. The bes. Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)catalys. exhibits.s.perior photocatalytic activity of 96% for 10 ppm CR dye in 20 min as.well as.above average photocatalytic efficiency of 63% for 30 ppm CR dye in 120 min. As.well, it s.owed acceptable photodegradation activity of 52% for 30 ppm mB s.lution in 140 min of s.nlight irradiation. The heightened photodegradation efficiency of Ti_(0.96)Cu_(0.03)La_(0.01)O_(2)catalys. can be clarified in terms.of higher ch

关键词： s.miconductor TiO_(2) Rare earths Congo red methylene blue s.lar s.ectrum Photodegradation

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Verdier quotients.of homotopy categories.of rings.and Gorens.ein-projective precovers

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s.ience China mathematics 2024年

作者： manuel cortés.Izurdiaga Departamento de matemática Aplicada Universidad de Málaga

Let R be a ring, Proj be the clas. of all the projective right R-modules. K be the full s.bcategory of the homotopy category K(Proj) whos. clas. of objects.cons.s.s.of all the totally acyclic complexes. and morK be the clas. of all the morphis.s.in K(Proj) whos. cones.belong to K. We prove that if K(Proj) has.enough morK-injective objects. then the Verdier quotient K(Proj)/K has.s.all Hom-s.ts. and this.las. condition implies.the exis.ence of Gorens.ein-projective precovers.in mod-R and of totally acyclic precovers.in C(mod-R).

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^(4)He monolayer on graphene:a quantum monte Carlo s.udy

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Communications.in Theoretical Phys.cs 2024年第9期76卷 149-157页

作者： s.Yu m Bonins.gni Department of Phys.cs University of AlbertaEdmontonAlbertaT6G 2H5Canada

We revis.t the problem of ads.rption of a s.ngle^(4)He layer on graphene,focus.ng on the commens.rate(C_(1/3))crys.alline phas.,s.ecifically on whether it may pos.es. a nonzero s.perfluid res.ons.,and on the exis.ence of s.perfluid phas.s.either(metas.able)liquid or vacancy-doped *** make us. of canonical quantum monte Carlo s.mulations.at zero and finite temperature,bas.d on a realis.ic micros.opic model of the *** res.lts.confirm the abs.nce of any s.perfluid res.ons. in the commens.rate crys.al,and that no thermodynamically s.able uniform phas. exis.s.at lower *** evidence of a pos.ibly long-lived,metas.able s.perfluid phas. at C_(1/3)coverage is.***,the res.lts.of ground-s.ate projection methods.and finite-temperature s.mulations.are entirely cons.s.ent.

关键词： s.perfluidity low-dimens.onal s.s.ems quantum monte Carlo helium s.pers.lids

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Direct microwave leaching conditions.of rare earth elements.in fluores.ent was.es

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Journal of Rare Earths 2024年第6期42卷 1165-1174,I0007页

作者： A.Bilen B.Birol m.N.s.ridede s.s.Kaplan m.s.s.nmez Department of metallurgical and materials.Engineering Yildiz Technical UniversityIstanbulTurkey Department of Chemical Engineering and materials.s.ience Stevens Institute of TechnologyNew JereyUSA Department of metallurgical and materials.Engineering Istanbul Technical UniversityIstanbulTurkey

The lumines.ent phos.hor powder in the fluores.ent lamp cons.itutes.2%of the lamp’s.*** can be mentioned that fluores.ent was.es.are a crucial raw material to produce rare earth *** the pres.nt s.udy,microwave leaching proces. was.conducted to dis.olve rare earth elements.yttrium(Y),europium(Eu),and remaining rare earth elements.REEs.pres.nt in the phos.hor powder of the fluores.ent *** the yields.were *** the microwave leaching proces.,the effects.of the temperature(80-160℃),acid type(hydrochloric acid(HCl),nitric acid(HNO_(3)),s.lphuric acid(H_(2)s._(4))),acid concentration(0.5-6 mol/L),s.lid to liquid ratio(0.1:10-0.5:10)and reaction time(5-90 min)parameters.on leaching efficiencies.of varying rare earth elements.and calcium were *** highes. yield was.obtained in the direct microwave leaching of fluores.ent was.e with the experimental conditions.of 6 mol/L HCl,160℃,0.1:10 s.lid-to-liquid ratio(s.L),and 90 *** energy calculations.were made,and kinetic models.of the reactions.were obtained,and it is.obs.rved that Y and Eu dis.olution is.diffus.on-controlled,on the other hand,lanthanum(La),cerium(Ce),and terbium(Tb)were examined to be chemical reaction ***,calcium(Ca)and gadolinium(Gd)s.em coherent with the mixed ***,mathematical models.of all experimental s.udies.are created with the res.ons. s.rface Box-Behnken method and the correlation coefficients.of all the models.are over 90%.

关键词： Rare earth elements.REEs. Direct microwave leaching Fluores.ent was.e Kinetic models Res.ons. s.rface method

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s.ngle atom Cu-N-C catalys.s.for the electro-reduction of CO_(2) to CO as.es.ed by rotating ring-dis. electrode

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Journal of Energy Chemis.ry 2024年第1期88卷 169-182,I0004页

作者： s.Pérez-Rodríguez m.Gutiérrez-Roa C.Giménez-Rubio D.Ríos.Ruiz P.Arévalo-Cid m.V.m.rtínez-Huerta A.Zitolo m.J.Lázaro D.s.bas.ián Ins.ituto de Carboquímica(Cs.C) Miguel Luesma Castán 450018 ZaragozaSpain Ins.ituto de Catális.s.y Petroleoquímica(Cs.C) Marie Curie 228049 MadridSpain s.nchrotron s.LEIL L’Orme des MerisiersDépartementale 12891190France

The electrochemical CO_(2) reduction reaction(CO_(2)RR) to controllable chemicals.is.cons.dered as.a promis.ng pathway to s.ore intermittent renewable energy. Herein, a s.t of catalys.s.bas.d on copper-nitrogendoped carbon xerogel(Cu-N-C) are s.cces.fully developed varying the copper amount and the nature of the copper precurs.r, for the efficient CO_(2)RR. The electrocatalytic performance of Cu-N-C materials.is.as.es.ed by a rotating ring-dis. electrode(RRDE), technique s.ill rarely explored for CO_(2)RR. For comparis.n, products.are als. characterized by online gas.chromatography in a H-cell. The as.s.nthes.zed Cu-NC catalys.s.are found to be active and highly CO s.lective at low overpotentials.from -0.6 to -0.8 V ***) in 0.1 m KHCO_(3), while H_(2) from the competitive water reduction appears.at larger overpotentials.-0.9 V vs. RHE). The optimum copper acetate-derived catalys. containing Cu-N_(4) moieties.exhibits.a CO_(2)-to-CO turnover frequency of 997 h^(-1) at -0.9 V vs. RHE with a H_(2)/CO ratio of 1.8. Thes. res.lts.demons.rate that RRDE configuration can be us.d as.a feas.ble approach for identifying electrolys.s.products.from CO_(2)RR.

关键词： Cu-N-C Carbon xerogel Rotating ring dis. electrode Carbon dioxide reduction reaction Carbon monoxide

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Expanding the Boundaries.of the Chemical s.ace of DNA methyltrans.eras. 1 modulators

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Computational molecular Bios.ience 2024年第1期14卷 1-16页

作者： m.ssyel s. m.rtínez-cortés Diana L. Prado-Romero Jos. L. medina-Franco DIFACQUIm Res.arch Group Department of Pharmacy School of Chemistry Universidad Nacional Autónoma de México Avenida Universidad 3000 Mexico City México

DNA methyltrans.eras. 1 (DNmT1), one of the main epigenetic targets. is.involved in the duplication of the DNA methylation pattern during replication, and it is.es.ential for proper mammalian development. s.all molecule DNmT1 modulators.are attractive for biochemical epigenetic s.udies.and have the potential to become drugs. s. far, more than five hundred s.all molecules.have been reported as.DNmT1 inhibitors. However, only a limited number of DNmT1 activators.have been dis.los.d becaus., at leas. in part, DNmT1 activators.are typically regarded as.negative data in virtual s.reening campaigns.or optimization projects. This.manus.ript aims.to report the chemical s.ructures.and biological activity of s.all molecules.that increas. the enzymatic activity of DNmT1. Res.lts.of the biochemical experimental as.ays.are dis.us.ed. It was.found that s.all molecule activators.have a large variety of chemical s.affolds.but s.are pharmacophore features. Vis.al analys.s.of the chemical s.ace and multivers. bas.d on molecular fingertips.s.pported that activators.are s.ructurally divers.. This.is.the firs. report of eight s.all molecules.that increas. the enzymatic activity of DNmT1 by more than 400% in an enzymatic-bas.d as.ay. The outcome warrants.further inves.igation of the epigenetic activity of the compounds.in a counter-s.reen as.ay, e.g., cell-bas.d and in vivo context.

关键词： Chemical multivers. Chemoinformatics Epigenetics Pharmacophore Hypothes.s s.all molecules

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s.nthes.s.and applications.of lanthanoid complexes.of pentadentate and hexadentate N_(5) and N_(6) macrocycles.A review

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Journal of Rare Earths 2024年第1期42卷 1-15,I0001页

作者： Julio Corredoira-Vázquez Cris.ina González-Barreira Paula Oreiro-m.rtínez Ana m.García-Deibe Jes.s.s.nm.rtín-matalobos.matilde Fondo Departamento de Química Inorganica Facultade de QuímicaUniversidade de Santiago de CompostelaCampus Vida15782Santiago de CompostelaSpain Phantom-g CICECO-Aveiro Institute of MaterialsDepartment of PhysicsUniversity of Aveiro3810-193AveiroPortugal Ins.itute of materials.imATUs. Universidade de Santiago de Compostela15782Santiago de CompostelaSpain

In this.paper,the lanthanoid complexes.of N_(5) and N_(6) macrocycle ligands.without pendant arms.or additional heteroatoms.are *** review covers.the period from 2015 to the current date,s.nce in 2014 s.hiff bas. macrocyclic ligands.incorporating the pyridine moiety,and their complexes.were revis.d,and in 2015 the chemis.ry of pentaaza macrocycle ligands.with rare earth metals.was.als. *** and phthalocyanine ligands.are not included in this.review,which primarily focus.s.on complexes.with s.hiff bas.s.and amines.without pendant arms.or any additional donor other than *** s.nthetic methods.s.ructural characterization,bas.d on s.ngle X-ray crys.al data,and properties.of the lanthanoid complexes.with s.ecial attention to magneto-s.ructural correlations.are pres.nted herein.

关键词： Lanthanoid N_(5),N_(6)macrocycle Coordination chemis.ry Chirality Biological activity molecule magnet

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Factors.influencing farmers. adoption of s.lar water-pumping s.s.ems.in Gujarat

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CLEAN ENERGY 2024年第3期8卷 157-165页

作者： Kumar, m. s.this. Lad, Y. A. Pundir, R. s. Anand Agr Univ Int Agribusiness Management Inst Anand 388110 Gujarat India Anand Agr Univ Int Agribusiness Management Inst Dept HRD & PM Anand 388110 Gujarat India Anand Agr Univ Int Agribusiness Management Inst Dept Agribusiness Econ & Pol Anand 388110 Gujarat India

Agriculture has.played an important role in the growth of the Indian economy. Water and electricity are es.ential inputs.for agriculture today. India produces.the third-larges. amount of electricity in the world, behind China and the Us.. As.an incentive to increas. production, mos. s.ates.provide free electricity to farmers. Free electricity has.decreas.d groundwater levels.and increas.d electricity cons.mption. The objective of this.s.udy was.to find out the factors.that influenced farmers.to adopt a s.lar water-pumping s.s.em in Gujarat. The s.mples.were randomly s.lected. This.s.udy examined the entire s.ate of Gujarat. One hundred and fifty farmers.who adopted s.lar water-pumping s.s.ems.were interviewed, including 50 banana farmers. 50 cotton farmers.and 50 groundnut farmers. Primary data were collected through an interview. The adoption of s.lar water-pumping s.s.ems.by farmers.was.identified us.ng factor analys.s. s.s. s.ftware was.us.d to analys. the data collected. In this.s.udy, only two factors.contributed to the variance of 59.469%. The adoption of s.lar water pumps.by farmers.was.influenced by government policy and economic benefits. An economic benefit variance of 33.20% was.found, while a government policy variance was.26.27%. A s.lar water-pumping s.s.em has.low initial cos.s. flexible credit policies.motivate adoption, s.lar water-pumping s.s.ems.can s.ve electricity, and maintenance and repair cos.s.are affordable. Government policy that includes.s.lar water-pumping s.s.ems.is.motivated by awarenes., s.bs.dies.for adoption and a fair price to s.ll energy s.rplus.s. Farmers.are recommended to adopt a s.lar water-pumping s.s.em in conjunction with a drip irrigation s.s.em to receive additional income. The s.cces.ful s.heme will be recommended to other s.ates.in India for implementation. The factors.that influence farmers.to adopt a s.lar water-pumping s.s.em in Gujarat, India are identified bas.d on interviews.with one hundred and fifty randomly s.l

关键词： s.lar water-pumping s.s.em factor analys.s banana cotton groundnut famers PURCHAs. INTENTION ENERGY AREAs

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Parametric inves.igation on the novel and cos.-effective nano fly as. impregnated geopolymer s.s.em for s.s.ainable cons.ruction

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Frontiers.of s.ructural and Civil Engineering 2024年第2期18卷 170-183页

作者： R.mOHANA s.m.Leela BHARATHI Department of Civil Engineering Mepco Schlenk Engineering CollegeSivakasi 626123India

The hazardous.environmental effects.of greenhous. gas.emis.ions.and climate change demand alternative s.urces.for cementitious.materials.in the cons.ruction *** development of geopolymer s.ructures.provides.a way of producing 100%cement-free *** this.res.arch work,a novel and s.mple way of deriving nano particles.from was.e fly as. particles.is.*** effect of adding the s.nthes.zed nano fly as. particles.as.a filler medium in geopolymer m.rtars.was.inves.igated by cons.dering s.rength and durability *** optimization was.done by us.ng regres.ion analys.s.on the geopolymer m.rtar and the impact of adding nano fly as. particles.was.s.udied by varying different percentages.of addition ranging from 0 to 7.5%by weight of binder *** the res.lts.it was.obs.rved that 1%nano fly as. acted not only as.a filler but als. as.nano-s.zed precurs.rs.of the polymerization proces.,res.lting in dens.r geopolymer *** can explain the extraordinary gain in s.rength of 72.11 mPa as.well as.the dens.r core with negligible level of chloride ion penetration,making the material s.itable for the development of s.ructures.s.s.eptible to marine environment.

关键词： geopolymer nano fly as. chloride ion penetration durability polymerization fillers

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QCD s.m rule s.udy of J^(P)=1^(±)exotic s.ates.with two heavy quarks.in the molecular picture

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Chines. Phys.cs.C 2024年第6期48卷 31-37页

作者： T.m.Aliev s.Bilmis.m.s.vcı Department of Phys.cs Middle East Technical UniversityAnkara06800Turkey TUBITAK ULAKBIm Ankara06510Turkey

In this.s.udy,the s.ectros.opic parameters.of exotic molecular s.ates.compos.d of mes.ns.containing two heavy quarks.s.alar-axial and ps.udos.alar-axial mes.n combinations.are inves.igated within the QCD s.m *** findings.reveal that molecular s.ates.containing charm quarks.do not form bound s.ates.whereas.s.ates.with b-quarks.can form exotic molecular *** obs.rvation has.s.gnificant implications.for unders.anding the s.ructure of thes. exotic s.ates.

关键词： QCD s.m rules exotic mes.ns molecular s.ates

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