ナノ粒子Ｐｄの形成場としての自己組織化イオン液体修飾酸化グラフェン複合体の合成

作为纳米颗粒 Pd 形成位点的自组装离子液体改性氧化石墨烯复合材料的合成

• 批准号: 17F17081
• 负责人: 笹木 圭子
• 金额: $ 1.54万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2017
• 资助国家: 日本
• 起止时间: 2017-04-26 至 2019-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17F17081/
• 关键词: graphene oxide; functionalization; selective extraction; Pd nanoparticle; Ionic liquid; Graphene oxide; Palladium extraction; Radioactive palladium; Organo-montmorillonite; Perchlorate removal; Gemini surfactant

The platinum group metal (PGM) reserves are depleting severely every year, and the demand to supply ratio is forecast to widen significantly by 2020. These factors induce the growing pressure on PGM recycling. High-level liquid waste (a spent nuclear fuel), spent automotive catalyst leachates are potential secondary sources for the urban mining of PGMs. The preparation of high acid tolerant and efficient functional materials is a challenging task in the solid phase recovery of noble metals. To overcome this issue, covalently functionalized graphene oxide (GO) materials were explored. The GO was covalently functionalized with 1-(3-aminopropyl)imidazole (ImGO), 2-methylthiophene (ThpGO), 2-aminoethanethiol (CysGO) through amide or amine formation at different reactive sites. Both ImGO and ThpGO were found efficient for the selective extraction of Pd from HLLW containing several metal ions. Both the materials could be recycled without a drop in efficiency for the studied five cycles.CysGO was employed for the recovery of precious metals from the simulated spent catalyst leachates containing various PGMs (Pd, Pt and Rh), rare metals (Zr, Y, La and Ce), alkaline earth metals (Ba), and base metals (Cu, Fe, Zn, and Ni) at 1M acid concentration. CysGO could selectively extract precious metals from all three medium with Pd (87.7 mol%) as major component and Pt co-adsorbed in small amount. The regenerated materials were converted into PGM nanoparticle supported graphene materials, a well-known heterogeneous catalyst through simple pyrolysis under N2 atmosphere at 500oC.

铂族金属（PGM）储量每年都在严重枯竭，预计到2020年供需比将大幅扩大。这些因素导致PGM回收的压力越来越大。高放废液（一种乏核燃料）、废汽车催化剂沥滤液是城市铂族金属开采的潜在二次来源。高耐酸、高效功能材料的制备是贵金属固相回收领域的一个挑战性课题。为了克服这个问题，探索了共价官能化的氧化石墨烯（GO）材料。通过在不同的反应位点形成酰胺或胺，GO与1-（3-氨丙基）咪唑（ImGO）、2-甲基噻吩（ThpGO）、2-氨基乙烷（CysGO）共价官能化。ImGO和ThpGO被发现有效的选择性萃取钯从高放废液含有几种金属离子。这两种材料都可以回收而不降低效率为研究的five cycles.CysGO用于回收贵金属从模拟废催化剂沥滤液含有各种铂族金属（Pd，Pt和Rh），稀有金属（Zr，Y，La和Ce），碱土金属（Ba），和碱金属（Cu，Fe，Zn和Ni）在1 M酸浓度。CysGO可以从所有三种介质中选择性地萃取贵金属，其中Pd（87.7mol%）为主要组分，Pt以少量共吸附。再生材料通过在N2气氛下在500 ° C下的简单热解转化为PGM纳米颗粒负载的石墨烯材料，这是一种众所周知的非均相催化剂。

项目成果

Synthesis of modulator-driven highly stable zirconium-fumarate frameworks and mechanistic investigations of their arsenite and arsenate adsorption from aqueous solutions

• DOI: 10.1039/c8ce01424h
• 发表时间: 2019-04
• 期刊: CrystEngComm
• 影响因子: 3.1
• 作者: Subbaiah Muthu Prabhu;S. Kancharla;C. Park;K. Sasaki

Covalently functionalized graphene oxide for the recovery of palladium from spent nuclear fuel

共价功能化氧化石墨烯用于从乏核燃料中回收钯

• 发表时间: 2018
• 作者: Srinivasarao Kancharla;Keiko Sasaki
• 通讯作者: Keiko Sasaki

Gemini Surfactant Modified Organo Montmorillonite for Efficient Removal of Perchlorate

Gemini 表面活性剂改性有机蒙脱土，高效去除高氯酸盐

• 发表时间: 2018
• 作者: Srinivasarao Kancharla; Keiko Sasaki
• 通讯作者: Keiko Sasaki

Gemini surfactant modified-montmorillonite for efficient removal of perchlorate

Gemini表面活性剂改性蒙脱石，高效去除高氯酸盐

• 发表时间: 2017
• 作者: S. Sakaguchi;T. Sakurai;J. Ma;M. Sugimoto;T. Yamaki;A. Chiba;Y. Saito;and S. Seki;Kancharla Srinivasarao and Keiko Sasaki
• 通讯作者: Kancharla Srinivasarao and Keiko Sasaki

Enhanced adsorption of perchlorate by gemini surfactant-modified montmorillonite: Synthesis, characterization and their adsorption mechanism

• DOI: 10.1016/j.clay.2018.07.010
• 发表时间: 2018-10-01
• 期刊: APPLIED CLAY SCIENCE
• 影响因子: 5.6
• 作者: Srinivasarao, Kancharla;Prabhu, Subbaiah Muthu;Sasaki, Keiko
• 通讯作者: Sasaki, Keiko