APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 9
·e70351
·
IF 0
Xinliang Wang,Zhiwei Wang,Changqing Xia,Zhengshen Bao,Dehong Xu,Yinhai Ma,Shixing Wang,Weili Li
In this work, functional organic ligands are incorporated into the structurally stable metal–organic framework (UiO-66-SPA) to regulate the electrostatic potential and coordination positions of its inner and outer surfaces. The gold extraction efficiency of functionalized MOFs from acidic gold-containing wastewater is 2.65 times that of non-functionalized UiO-66-(SH) 2 . In this way, efficient recovery of Au(III) in complex trace Au(III) wastewater is achieved. After multiple regeneration cycles, UiO-66-SPA still maintains 99% of its adsorption capacity. Through characterization techniques such as X-ray photoelectron spectroscopy (XPS), density functional theory (DFT) calculations, kinetics, and thermodynamics, it is confirmed that the adsorption of Au(III) by UiO-66-SPA involves the synergistic effect of chelation coordination. This work provides a way to enhance adsorption for the post-modification of MOFs. The experiment of recovering Au(III) from industrial simulated wastewater improves the experimental data for the application of this material in Au(III) recovery. The research in this article is of great significance for MOFs materials in environmental protection, sustainable development of non-renewable resources, and green development of Au(III) resources.
✓ 已验证
产品关联
DOI
HYDROMETALLURGY
·
2022
·
IF 4.217
Yong Xiang,Yun Liu,Mingjie Li,Wencai Bai,Guoji Liu,Li Xu
The significance of recycling gold is self-evident. However, existing technologies for recovery of gold show several disadvantages, including their high costs, difficulty to recover adsorbent, as well as low adsorption capacity. Thus, an ecofriendly gold recovery system with low cost and high efficiency should be developed. In this study, a novel RFT-SA adsorbent (RFT:SA = 1:1) was developed, which was achieved by wrapping the self-assembled resorcinol-formaldehyde-thiourea (RFT) in sodium alginate (SA) hydrogels. This study suggests that it can make up for the shortcomings of powder adsorbent RFT that is difficult to collect, and it can fully use the high adsorption capacity and high selectivity of RFT. The RFT-SA adsorbent exhibited high adsorption capacity as Au(III) reached 603.4 ± 24.6 mg g −1 of M Au / M dry-gel . It is noteworthy that RFT-SA exhibited excellent selectivity to Au(III) in simulated electronic waste leachate containing Au(III) and other competing ions, thus suggesting that RFT-SA can recover gold efficiently under complex conditions. This study can provide a new idea for designing a novel type of adsorbents for precious metal ions with high adsorption capacity, high selectivity and being easy to collect for the efficient recovery of precious metals from electronic waste leachate.
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Bo Lin,Wangzhi Chen,Yujie Lei,Xingyu Ma,Jieyao Wang,Lei Li
The enrichment and recovery of gold from wastewater are an alternative method to obtain this noble metal, which benefits reducing hazardous emissions from the conventional ore mining process and reserving natural gold for sustainable development. Inspired by our previous work (Lei et al., Macromol. Rapid Comm. 2022, 2200712), four families of microporous polyureas (mPPUs) with a large surface area (690 m2 g–1) and abundant heteroatom sites have been prepared via the factor-optimized solvothermal protocol. The resultant sample NPU-A starting from 1,5-naphthalene diisocyanate (NDI) and tri(4-aminophenyl) amine (TAPA) exhibits the maximum Au(III) adsorption capacity of 1300 mg g–1 and high selectivity even when the Au(III) concentration is as low as 0.1 mg L–1. This study not only demonstrates the robustness of the high-throughput synthetic strategy but also promotes the investigation of the structure–activity correlation between the mPPU chemical structure and Au(III) adsorption performance.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MINERALS ENGINEERING
·
2020
·
IF 3.795
Zhigang Zhao,Peng Chen,Fan Yang,Qiuxia Liao,Yang Zhang,Panpan Zhao,Wanghuan Guo,Ruixi Bai,Chunqing Cai
The type of diglycolamic acid extractant N , N -di-2-ethylhexyldiglycolamic acid (D2EHDGAA) was examined for selective extraction and separation of Au(III) in acidic chloride solutions containing Pd(II), Pt(IV), Rh(III), and Cu(II). The separation factor β Au/Pt = 959.3 was observed in 7 M hydrochloric acid. The extraction of Au(III) was quick, and extraction equilibrium was reached in less than 5 min. The n -dodecane and kerosene diluents had a notable effect on the extraction of Au(III) with the D2EHDGAA, and the D2EHDGAA had excellent capacity in n -dodecane and kerosene. However, the selectivity coefficient of Au(III) and Pd(II) was better in n -dodecane (β Au/Pd = 1070) than in kerosene (β Au / Pd < 0.1) of 4 M hydrochloric acid. The extraction mechanisms of the Au(III) and Pt(IV) were investigated, and the results suggest that one metals ion is extracted with two and one extractants in 1 M HCl concentration. The D2EHDGAA-based n -dodecane extracting phase was easily activated using a low-concentration thiourea aqueous solution (0.01 M). The recyclability of D2EHDGAA for five cycles was investigated, and its efficiency decreased less than 4%.
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haiyan Kang,Yulong Luo,Chaopeng Liu,Zhongxian Song,Chaohai Wang,Xu Yan,Mengxia Ma,Xiaole Yan,Deming Gu,Yanli Mao
The recovery of Au(III) by adsorption has attracted extensive attention since it promotes solving the problems of environmental pollution and resource waste. Herein, we prepared the functionalized MCM-41 (MCM-NH 2 -OH) and explored the synergistic adsorption effects for Au(III). The adsorption capacity of MCM-NH 2 -OH reached 1664.9 mg·g −1 , which was 15.98 times and 2.99 times higher than MCM-NH 2 (104.2 mg·g −1 ) and MCM-OH (556.0 mg·g −1 ), respectively. The fitting kinetics experiments demonstrated that Au(III) adsorption by MCM-NH 2 -OH was conformed to the pseudo-second-order kinetic model. The adsorption rate of MCM-NH 2 -OH (2.62 × 10 -2 g·mg −1 ·min −1 ) was 346.1 times higher than MCM-NH 2 (7.57 × 10 -5 g·mg −1 ·min −1 ). The adsorption mechanism and the role of –NH 2 and –OH groups were investigated by XPS, XRD, and FTIR. More Au(III) can be adsorbed on –NH 2 groups by electrostatic attraction and chelation that provided electron acceptor for –OH groups, which further enhanced the reduction of Au(III) to Au(0). Further, MCM-NH 2 -OH exhibited superior selectivity and reusability for Au(III). Therefore, the synergy between –NH 2 and –OH groups is suitable for efficient adsorption-recover of gold applied in actual wastewater.
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2022
·
IF 10.723
Lingyuan Chen,Jiali Tang,Suoque Wu,Shixing Wang,Zhaogang Ren
A pyridine-modified chitosan ( PMCS ) adsorbent with excellent adsorption performance and specific selectivity for Au(III) in wastewater was prepared. FTIR, SEM, XPS and XRD were used to study its adsorption performance, and various models were used to fit and analyze the experimental adsorption data. The maximum adsorption capacity of PMCS for Au(III) is 549.41 mg/g (298 K, pH = 4). The data analysis results prove that the PSO and Langmuir models best describe the adsorption process. Adsorption experiments in the presence of multiple ions proved that PMCS is selective for the adsorption of Au(III). The adsorption and desorption experiments showed that the adsorption rate of PMCS could still reach 94.77% after three cycles. In summary, PMCS was demonstrated to be a high-quality material for the adsorption of Au(III) from wastewater due to its excellent adsorption performance, specific selectivity and reusability.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULAR PHARMACEUTICS
·
2023
·
IF 4.9
Juzheng Zhang,Ronghao Fang,Yanping Li,Jiamin Jin,Feng Yang,Jian Chen
Metal-based drugs have been used for decades to treat solid cancers; however, these drugs have no significant therapeutic effect on glioma because they cannot effectively cross the blood–brain barrier (BBB). To develop a novel metal-based agent that can cross the BBB to target glioma, we synthesized an Au complex (C2) with remarkable glioma cytotoxicity and fabricated lactoferrin (LF)-C2 nanoparticles (LF-C2 NPs) as a novel therapy. We confirmed that C2 kills glioma cells by inducing apoptosis and autophagic death. The LF-C2 NPs cross the BBB, inhibit glioma growth, and selectively accumulate in the tumor tissue, significantly decreasing the side effects of C2. This study provides a novel strategy for applying metal-based agents to targeted therapy for glioma.
✓ 已验证
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Jiuxiao Dong,Hongzhi Liu
A novel water-soluble silsesquioxane precursor (DEA-GSQ) was prepared by the nucleophilic substitution reaction of diethanolamine (DEA) with glycidyloxypropyl substituted silsesquioxane (GSQ). DEA-GSQ can be used to crosslink chitosan to prepare hybrid aerogels (DGCA). The hybrid aerogels were fully characterized using Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, compression performance test and Mercury intrusion porosimetry. The hybrid aerogel shows selective adsorption for Au(III) with the saturated adsorption capacity of 918.16 mg/g at pH = 6. Pseudo-second-order model and Langmuir model could describe the adsorption process well. It was found that Au(III) was mostly reduced to Au(0) by C N bond during the adsorption process. Furthermore, an adsorption device was designed to remove Au(III) based on this hybrid aerogel, laying the foundation for the adsorption of Au(III) in practical applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Chaopeng Liu,Yanli Mao,Zhongxian Song,Yilong Yang,Xu Yan,Haiyan Kang,Yuzhong Liu,Deming Gu,Xia Zhang,Xiaole Yan
Thiourea-modified Cu 2 O (Cu 2 O-TU) was prepared by a facile route and used for the selective recovery of gold in acidic solution. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analysis elucidated that Au (III) ions were adsorbed onto the surface of Cu 2 O-TU via the electrostatic attraction of surface protonated amines groups (-NH 3 + ) with AuCl 4 - and the chelating interaction of pyrrole-type nitrogen as well as C S groups in the pH range of 1.0 – 5.0. Subsequently, partial adsorption of Au (III) was reduced to Au (I) and Au (0), while pyridine-type nitrogen was oxidized to -NO, which accelerated the adsorption rate of Au (III). The adsorption equilibrium time was about 2 min and the adsorption capacity was 79.7 mg·g −1 at a pH value of 2.0 in 40 mg·L −1 Au (III) solution. The fitted result of gold adsorption by the Langmuir model was 1529.4 mg·g −1 at 318 K. The experimental data conformed to the pseudo-second-order model, indicating that the adsorption process was chemisorption . After 5 cycles, the capability of adsorption only decreased by 7.43%, which provided a great possibility for its application in solutions. Besides, Cu 2 O-TU showed specific and selective adsorption ability for Au (III) in the outdoor environment .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2018
·
IF 2.891
Zhangbao Chen,Shanshan Wang,Xiaoming Yang
Herein, one type of carbon dots (CDs) directed by l -threonine has been innovatively synthesized on the basis of a facile approach. Meanwhile, the CDs mainly consisted of C, O, N, and P according to the detailed characterizations. Importantly, the CDs obtained here not only exhibited the bright-blue fluorescence and generally acceptable stability, but also showed the promising for detecting Au 3+ and l -methionine. To be specific, the off-process by an obvious fluorescence quenching of the CDs achieved assaying Au 3+ , and Au 3+ could be removed by the introduction of l -methionine through the stronger interaction between Au 3+ and l -methionine, and thus leading to the fluorescence of CDs recovered. Consequently, the quantitative analyses of Au 3+ concentration in a linear range of 6 μM–1 mM was obtained along with the range from 80 μM to 1 mM for l -methionine. In addition, the practicability of this proposed method was validated by the detections of the lake samples, suggesting that it could broaden the sensing strategies for assaying both Au 3+ and l -methionine.
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2018
·Vol. 185
·期 2
·1-8
·
IF 5.705
Yang Kunhao,Pan Long,Gong Lingling,Liu Qingju,Li Zhongqiu,Wu Li,He Yujian
A highly selective method is described for the colorimetric determination of Au(III) ions in acidic solution using gold nanoparticles (AuNPs) functionalized with thiolated methoxy poly(ethylene glycol) (mPEG). The presence of Au(III) induces the aggregation of the PEG-AuNPs, and this is accompanied by a color change from wine red to blue, and a decrease in absorbance at 525 nm. This can be monitored spectrophotometrically and visually. Absorbance at 525 nm linearly drops in the 0.50 to 1.75 mg·L −1 Au(III) concentration range, with a 0.25 mg·L −1 detection limit. The method is surprisingly selective over other metal ions. It was successfully applied to the analysis of ore samples.
ᅟ
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Yunzhu Xu,Dahai Hou,Min Zhao,Tong Zhao,Yong Ma,Yafeng Zhang,Yang Guo,Weiwei Tao,Hui Wang
The construction of highly catalytic nanozymes that are composed of biomolecules remains a difficulty due to complicated synthesis methods and poor catalytic efficiencies. In this study, the authors fabricated noble metal ion supramolecular nanospheres (Fmoc-His-Au) through the combination of electrostatic adsorption and multifarious weak intermolecular force between AuCl4– and amphipathic histidine. The synthesis procedure is extremely simple and easy, and the noncovalent bond interactions between amphiphilic histidine and AuCl4– facilitated the constitution of supramolecular nanostructures and simultaneously stabilized the highly active AuCl4– center, which exhibited great peroxidase (POD)- and oxidase (OXD)-like capacities that could efficaciously transform the dissolved oxygen and H2O2 to reactive oxygen species (ROS). In addition, this simple and innovative nanozyme displayed a preeminent antibacterial and wound healing performance both for Staphylococcus aureus and Escherichia coli bacteria in vitro and in vivo, with the bacteria inhibition percentage of over 98% for S. aureus and E. coli, and exhibited benign biocompatibility and low toxicity. This study paves the way for designing outstanding catalytic enzyme-like supramolecular nanostructures composed of simple amino acids and metal ions for wide nanomedical and pharmaceutical applications.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）