见金不见人

从前，齐国有个人想得到很多金子这天清早，他穿戴得整整齐齐地来到集市。当路过卖金子的地方时，他看见黄澄澄的金子，不禁伸手抓了几锭就走。

楚“良金”铜钱牌的释读及意义

楚国货币中有良金铜钱牌一种,对其面文的释读学术界看法不一。该钱牌面文应释读为现金一朱、现金二朱、现金四朱,是楚国在特定交换条件下发行的一组特殊性质的货币,其作用可以与楚国其他种类货币兑换使用。

胶西北焦家断裂带深部成矿流体包裹体特征

焦家断裂带是胶西北地区最重要的断裂带之一,很多大中型金矿床沿此带分布。依托莱州市吴一村地区焦家断裂带深部的“中国岩金第一见矿深钻”钻孔岩心,挑选了不同蚀变阶段及主断裂带上下盘不同深度的花岗岩、黄铁绢英岩和金矿石开展流体包裹体岩相学、显微测温及激光拉曼分析研究,识别出3个成矿阶段、5个世代富含流体包裹体的石英和两大类型流体包裹体;焦家断裂带深部金成矿流体性质为中-低盐度H_(2)O-NaCl-CO_(2)±CH_(4)流体;成矿流体来源为地幔富含成矿金属的流体与浅部下渗大气降水混合成因,并可能有壳源变质流体的参与;成矿流体中金主要以一价金的硫氢络合物(AuHS^(o))形式迁移。岩相学观察及显微测温结果表明,主成矿阶段发生了H_(2)O-CO_(2)流体不混溶作用,并导致金矿化,发生流体不混溶的温度压力条件分别为210~260℃和150~210 MPa。中生代,古太平洋板块向欧亚大陆的北西向俯冲,引起胶东地区强烈的挤压变形和岩浆活动(形成玲珑花岗岩体)。随后,在早白垩世,构造体制从挤压向伸展转换,导致郭家岭花岗岩的侵位、郯庐断裂带的左型走滑运动,以及一系列NE—NNE向次级断裂形成,为深部岩浆-热液流体的上升提供了通道。在岩浆-热液流体上升过程中与地壳中-上部循环的变质水和大气水发生混合,最终形成金矿床。

Simultaneous hydrogen production with the selective oxidation of benzyl alcohol to benzaldehyde by a noble‐metal‐free photocatalyst VC/CdS nanowires

In this work we used CdS NWs(nanowires)with vanadium carbide(VC)attached via facile electrostatic self‐assembly and calcination method.The results showed that compared to pristine CdS NWs,the photocatalytic activity of CdS NWs loaded with the particular amount of VC was dramatically enhanced.Among them,the VC/CS‐15 indicated the highest enhancement for simultaneous production of H2 with selective oxidation of benzyl alcohol(BO)into benzaldehyde(BD).The highest hydrogen evolution rate of 20.5 mmol g^(-1)h^(-1)was obtained with more than 99%selectivity for BD production under visible light(λ˃420 nm)irradiation for 2 h,which was almost 661 times higher than the pristine CdS NWs.This enhancement of photocatalytic activity is due to the VC,which provides a favorable attraction for BO by lowering the zeta potential,along with the active site for hydrogen production,and retard the recombination of electron‐hole pairs by increasing the conductivity of the photocatalyst.Moreover,the apparent quantum efficiency(AQE)of VC/CS‐15 for BD and H_(2)production at monochromatic 420 nm is about 7.5%.At the end of the hydrogen evolution test,the selective oxidation with more than 99%selectivity was obtained.It hopes this work will prove its future significance and move scientific community toward a more economical way for achieving the commercialization of H_(2) by photocatalysis.

Electric Conductivity Study of o-Substituted Phenoxo Iron （Ⅲ） Complexes

The coordination nature of a number of substituted sodiumphenoxides to iron （Ⅲ） ion has been studied. The o-nitrosodiumphenoxide was found to have different coordination behaviour from that the sodium salts of salicylic acid and methylsalicylate showed. The structure of the complexes, the number of the ligands being coordinated to the metal ion, has also been determined by titration, uv-vis spectroscopy, atomic absorption and the flame test. In addition, other sodium phenoxides were also involved in this study for comparison. An electric conductivity study on the resulting complexes was carried out and all complexes were found to be semiconductors.

Antioxidant activity of phytosynthesized biomatrix-loaded noble metallic nanoparticles

Biofabrication of noble monometallic platinum nanoparticles(Pt-NPs) and bimetallic gold–silver nanoparticles(Au Ag-NPs) using aqueous extract of Delonix regia is presented here. Antioxidant activity of biomatrix-loaded metallic nanoparticles is estimated for scavenging of two model radicals i.e., 2,2′-Azino-bis-(3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt and 1,1′-Diphenyl-2-picrylhydrazyl. Broad spectral continuum spanning from visible to ultra-violet region(Pt-NPs: 30 min) and broad high intensity absorption peak around at 500 nm(Au Ag-NPs: 10 min) in two different UV–Visible spectra confirmed the biofabrication. Nanoparticles fabricated with distorted spherical shape and crystalline face-centred-cubic geometry. Strong signal around at 2.10 ke V(pure-phase platinum) and typical X-ray peaks observed at 2.20 and 3 ke V suggested, co-existence and alloying interaction of Au and Ag in Au Ag-NPs. ζ potential(-15.2 mV: Pt-NPs and -13.9 mV: Au Ag-NPs) values suggested surface adsorption of polyphenolic compounds to provide stability. Nanoparticles exhibited pronounced antioxidant activity against free radicals through their electron/hydrogen transfer ability.

Synthesizes and Characterization Studies of Some Metal Ion Complexes with EOSBE and MOSBE

This work includes synthesis of 2,2＇-（5,5＇-（ethane-1,2-diyl）bis（1,3,4-oxadiazole-5,2diyl））bis（sulfanediyl）dibenzenamine （EOSBE） and 2,2＇-（5,5＇-methylenebis（1,3,4-oxadiazole-5,2-diyl）bis（sulfanediyl））dibenzenamine （MOSBE）. All synthesized ligands were characterized by IR, ^1H-NMR, ^13C-NMR, UV-visible spectroscopies and molar conductivity. A series of complexes with a general formula [M2LCl4]. Where M（Ⅱ） = Co, Ni, Cu and Zn; L = EOSBE and MOSBE were synthesized in basic media using KOH solution. In these complexes both ligands are bidentate ligands coordinated through sulfur and nitrogen. All complexes have been characterized by IR-spectra, UV-visiblc spectra, conductivity and magnetic susceptibility.

Gold （III） Complexes with Thiolactate and bis-（1,4-Sodiumthiolactate） Butane Ligands

The new ligand bis-（1,4-sodium thiolactate） butane （L）-O2CCH3S-（CH2）4SCHCH3CO2- has been prepared from the reaction of disodium salt of thiolactic acid and 1,4-dichlorobutane, while the disodium thiolactate was prepared instanteously through the reaction of thiolactic acid with NaOH. Mono and dinuclear complexes were obtained by direct reaction of the above ligands with H[AuCI4] in 1 ： 1, 2：1, 1：2, 2：2 and 3：1 ligands to metal molar ratio. The prepared complexes were characterized by elemental analysis, spectral studies FTIR （Fourier transform Infrared） and UV-Vis, magnetic measurement, conductivity measurement and IHNMR for the ligand （L） and some of the complexes. The conductance data indicate that the complexes of the formulas Na[Au（SCH3CHCOO）2], Na[Au（SCH3CHCOO）（OOCCHCH3SH）2] and [Au（L）]Cl are 1：1 electrolyte. Electronic spectra and magnetic moment values indicate the presence of square planner geometry around Au（III） ions.

Spectra analysis and O_2 evolution for TiO_2 photocatalyst compounded with indirect transition semiconductors

The photo absorbing, photo transmitting and photoluminescence performances of WiO2 photocatalysts compounded with V2O5 or WO3 were investigated by UV-Vis spectra, transmitting spectra, and PL spectra, respectively. The energy band structures of TiO2 photocatalysts were analyzed. The photocatalytic activities of the TiO2 photocatalysts were investigated by splitting of water for 02 evolution. The results indicate that the band gaps of WO3 and V205 are about 2.8 and 2.14 eV, respectively, and the band gap of rutile TiO2 is about 3.08 eV. Speeds of water splitting for 2%WO3-TiO2 and 8%V2O5-TiO2 photocatalysts are 420 and 110 μmol/（L.h）, respectively, under UV light irradiation. V2O5 and WO3 compounded with suitable concentration can improve the photocatalytic activity of TiO2 with Fe3＋ as electron acceptor.

Synthesis and Antimicrobial Activity of Boron-doped Titania Nano-materials

Antibacterial activity of boron-doped TiO2(B/TiO2) nano-materials under visible light irradiation and in the dark was investigated. A simple sol-gel method was used to synthesize TiO2 nano-materials. X-ray diffraction pattern of B/TiO2 nano-materials represents the diffraction peaks relating to the crystal planes of TiO2(anatase and rutile). X-ray photoelectron spectroscopy result shows that part of boron ions incorporates into TiO2 lattice to form a possible chemical environment like Ti O B and the rest exist in the form of B2O3. The study on antibacterial effect of B/TiO2 nano-materials on fungal Candida albicans(ATCC10231), Gram-negative Escherichia coli(ATCC25922) and Gram-positive Staphylococcus aureus(ATCC6538) shows that the antibacterial action is more significant on Candida albicans than on Escherichia coli and Staphylococcus aureus. Under visible light irradiation, the antibacterial activity is superior to that in the dark.

Photocatalytic remediation of ionic pollutant

Recently, the photocatalysts have attracted lots of attention and efforts due to their great potential for environmental remediation application. Toxic ions in water are an increasing environmental pollutant with the fast development. Numerous researches have been made to develop photocatalysts to treat ionic pollutants under the illumination of ultraviolet light and visible light. Here, photocatalytic remediation of toxic ionic pollutants has been reviewed. This review summarized and discussed various photocatalysts including TiO〉 modified TiO2, metal oxides, metalsulfides, and nitrides and their recent progress in removing ionic pollutants such as heavy metal ion. The latest achievements and their future prospects of photocatalytic remediation of ion pollutant have also been reviewed.

Flower-like Bi^0/CeO2-δ plasmonic photocatalysts with enhanced visible-light-induced photocatalytic activity for NO removal

Plasmonic bismuth(Bi^0)nanoparticle-decorated flower-like CeO2-δ(Bi^0/CeO2-δ)photocatalysts with abundant oxygen vacancies(OVs)were synthesized via a solvothermal method.The OVs can not only improve the separation of electron-hole pairs,but also facilitate the adsorption and activation of gas molecules(NO/O2).In addition,the Bi^0 nanoparticles can enhance the visible light response and prevent the recombination of charge carriers by virtue of the surface plasmon resonance(SPR)effect,achieving an excellent ability for NO elimination and NO2 inhibition under visible light irradiation.Density functional theory(DFT)calculations confirm that the Schottky barrier between Bi^0 and CeO2-δaccompanied with the OVs are pivotal for the migration of photogenerated charge carriers to involve in the photocatalytic NO removal.Trapping experiments and in situ FTIR spectroscopy were conducted to explore the mechanism of the photocatalytic NO removal,suggesting that the photocatalytic NO removal can be significantly enhanced by introducing abundant OVs and the involvement of Bi^0 metal nanoparticles.