Sustainability
·
2024
·Vol. 16
·期 5
·1945
·
IF 3.3
Zhongming Wu,Jianxin Deng,Tuanwei Zhao,Yang Zhou,Yongfu Kang,Xiangxiang Bai,Fei Hong,Longfei Fu,Gensheng Li,Zhiyi Zhang,Weiming Guan
Rapid economic development and increased demand for mineral products in China have led to extensive extraction of various ores, resulting in significant environmental challenges associated with the generation of industrial solid waste, particularly iron tailings. Despite being a major mining nation, China faces issues of wasteful practices, with substantial amounts of valuable elements lost during the processing of iron ore. This study addresses the urgent need for sustainable solutions by proposing an innovative approach for the recovery of valuable elements from iron tailings. The proposed process involves a sequential application of acid leaching, chemical precipitation, and Metal-Organic Frameworks (MOFs) ion adsorption. The pre-treated iron tailings were leached in HCl solution with pH 1.5 at 70 °C for 2 h, and the co-leaching efficiency of 98.1% V, 98.2% Mo, 99.3% Fe, and 98.7% Mg was obtained. Chemical precipitation is then employed to isolate Fe, Mg V, and Mo and promote the formation of targeted compounds, ensuring concentration and purity. The integration of MOF ion adsorption, known for its high surface area and tunable pore structures, provides an efficient platform for selectively capturing and recovering target ions. 97.7% V and 96.3% Mo were selectively extracted from Zirconium 1,4-carboxybenzene metal-organic framework (UiO-66) adsorption system with pH 5.0 at 30 °C for 6 h, and 91.7% V and 90.3% Mo were selectively extracted from 2-methylimidazole zinc salt metal-organic framework (ZIF-8) adsorption system with pH 5 at 30 °C for 6.0 h. This three-stage process offers an efficient method for the recovery of valuable elements from iron tailings.
研究领域:
环境科学
·
冶金工程
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DOI
高影响因子
Sustainable Chemistry and Pharmacy
·
2025
·
IF 5.8
Yang Liu,Shuo Zhang,Tingwei Zhang,Yongcan Jin,Huining Xiao,Chaofeng Zhang
5-Hydroxymethylfurfural (HMF) is a versatile biomass-derived platform compound, but its production from glucose and cellulose remains challenging. In this study, several nano-metal oxides (Al 2 O 3 , TiO 2 , ZrO 2 , and SnO 2 ) with distinct Lewis acidities were combined with a trace amount of HCl to catalyze the conversion of glucose to HMF in a methyl isobutyl ketone (MIBK)/H 2 O–NaCl biphasic system. Without HCl, fructose was formed and accumulated in the aqueous phase due to insufficient Brønsted acidity, limiting further dehydration to HMF. The addition of HCl effectively overcame this bottleneck, with Al 2 O 3 and HCl showing the best synergy. Under optimized conditions, a HMF yield of 69.1 % was achieved at 180 °C, and Al 2 O 3 exhibited excellent recyclability. This work demonstrates a promising approach for combining homogeneous and heterogeneous catalysis for efficient conversion of renewable carbohydrates into platform chemicals.
研究领域:
催化化学
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生物质转化
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绿色化学
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化学工程
·
有机合成
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Rui Sun,Qiang Wang,Zhenghao Kou,Yihan Huang,Xinbo Geng,Ruitong Xu,Haowen Yu,Han Jia,Hui Yan
Polyacrylamide (PAM) is widely considered as an ideal candidate for metal corrosion inhibitors due to its cost-effectiveness. Numerous studies improved its corrosion inhibition performance through functional group modification. This study synthesized a novel high-performance modified polyacrylamide corrosion inhibitor (P(AM-co-ATPB), abbreviated as “PAA”) by copolymerizing acrylamide (AM) and allyltriphenylphosphonium bromide (ATPB) monomers. The corrosion inhibition performance of PAM and PAA was evaluated through weight loss tests, surface characterization and electrochemical experiments. PAA can inhibit the mild steel (MS) corrosion in 1 M HCl solution more effectively at the ultralow concentration of 10 mg/L ( η M =85.56 %) than polyacrylamide (PAM) at 500 mg/L ( η M =83.17 %). Then the inhibition mechanism was further investigated using Langmuir adsorption isotherm fitting, quantum chemical (QC) calculations and molecular dynamics (MD) simulations. The unique benzene ring, P and Br atom in PAA enhanced both physical and chemical interactions between the corrosion inhibitor molecules and MS surface Fe atoms. And the π-π stacking among PAA molecules further strengthened the adsorption layer compactness, which should be responsible for its superior corrosion inhibition performance than PAM. This study proved that the additional monomer ATPB markedly improved PAM-based corrosion inhibition efficiency, providing a novel perspective for the molecular structure design of PAM-based corrosion inhibitors.
研究领域:
材料科学
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化学工程
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电化学
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高分子科学
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表面科学
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DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 27
·22250-22268
·
IF 3.289
Z. Zhang,N. C. Tian,X. D. Huang,W. Shang,L. Wu
The synergistic corrosion inhibition effect of indigo carmine and three kinds of cationic organic compounds on 1045 carbon steel (CS) in 0.5 M HCl solution is reported. Electrochemical measurements showed that these three cationic organic compounds combined with indigo carmine reduce the speed of corrosion on 1045 CS and act as effective inhibitors. The combination of indigo carmine with BAB resulted in the best synergistic corrosion inhibition effect (S = 17.14), and the best inhibition efficiency (95.0%). SEM images and XPS data of the corroded steel surfaces suggested that the indigo disulphonate anion and organic cation could be simultaneously adsorbed on the CS surface to inhibit the corrosion of iron. The synergistic inhibition mechanism was investigated by dynamic simulations using quantum chemistry.
研究领域:
材料腐蚀与防护
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物理化学
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金属材料科学
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表面科学
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电化学
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量子化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shihao Miao,Yuanguang Zhang,Hongyu Xia,Hongcheng Gao,Weihao Tao,Zhenzhu Zhang,Chenyu Huang,Lin Huang
In the study, highly N-doped metal organic framework (MOFs) derived CoFeN photocatalysts (CoFeN-N) were successfully prepared by using carbon nitride (g-C 3 N 4 ) nanosheets as the support with simultaneous additional N source. CoFeN-N activated hydrogen peroxide (H 2 O 2 ) was used to remove Methyl orange (MO) and Tetracycline hydrochloride (TC-HCl) in water under simulated visible light . N doping improves the photo-Fenton degradation ability of CoFeN to varying degrees, and the photocatalyst with the best performance is CoFeN-N2. The degradation rate constants (K) of MO and TC-HCl are 1.8 and 5.1 times of CoFeN, respectively. CoFeN-N2 did not significantly inhibit the degradation efficiency of organic pollutants under acidic, neutral and alkaline conditions. Meanwhile, the presence of coexisting anions (Cl − 、HCO 3 - and HPO 4 2- ) in water similarly does not obviously reduce the degradation ability of CoFeN-N2 for MO and TC-HCl, which indicates the excellent anti-interference ability of the prepared photocatalyst. The TOC test results indicate that CoFeN-N2 has excellent mineralization ability for organic contaminants. In addition, hydroxyl radicals , superoxide radicals, and holes (·OH, ·O 2 - and h + ) were demonstrated to be the primary active species for the degradation of organic pollutants by CoFeN-N2 through free radical trapping experiments and EPR tests. This work provides an attractive strategy for the preparation of highly N-doped photocatalysts and the efficient removal of organic pollutants from water by photo-Fenton coupling.
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DOI
高影响因子
RSC Advances
·
2015
·Vol. 5
·期 63
·51392-51398
·
IF 3.84
Jia-Ping Lai,Yue Zuo,Hui Sun,Ying Yu
The hydrophilic molecularly imprinted microspheres (HMIMs) functionalized with amino and carboxyl groups have been synthesized successfully using human hemoglobin as a template. The obtained HMIMs have been characterized using scanning electron microscopy (SEM), adsorption isotherms, dynamic binding as well as quartz crystal microbalance (QCM). The rebinding results indicate that the HMIMs exhibit highly selective recognition properties towards target human hemoglobin in Tris–HCl aqueous solution with an imprinting factor of 1.90 and a high binding capacity of 98 mg g−1. The QCM characterization results also demonstrate that the HMIMs coated electrode shows a more sensitive response to hemoglobin than that of a non-imprinted microspheres coated electrode.
研究领域:
材料科学
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分析化学
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生物化学
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Haidong Jia,Han Jia,Qiuxia Wang,Yingbiao Xu,Bowen Wang,Qiang Wang,Xu Li,Zhe Wang,Kaihe Lv,Pan Huang
A novel polymeric ionic liquid (PDBA-IL-NH2) using imidazolium ionic liquids with short alkyl chains as monomers and two control ionic liquids (PDBA-IL-OH and PIL-NH2) were synthesized. Their inhibition properties and mechanisms were explored via surface analysis, weight loss tests, electrochemical studies, and adsorption isotherm analysis. The corrosion inhibition efficiency (CIE) of PDBA-IL-NH2 gradually increased with increasing concentration, and the largest efficiency was 94.67% at 100 ppm. At the same concentration (50 ppm), the corrosion inhibition abilities of inhibitors were in the order of PDBA-IL-NH2 > PDBA-IL-OH > PIL-NH2 > IL-NH2. Based on the experimental investigation, the synergistic effect of electrostatic interaction, protonation, and electron donor–acceptor interaction facilitated the intensive entanglement and coverage of PDBA-IL-NH2 with the reticulated form on the metal, and the generated densest films protected the metal from the corrosive media. Ultimately, the theoretical results of molecular dynamics simulations and quantum chemical study were in high agreement with the experimental data, which confirmed the proposed inhibition mechanisms on the microscopic scale. This study contributed valuable perspectives to the design of efficient and ecofriendly corrosion inhibitors.
研究领域:
材料科学
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腐蚀与防护
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理论化学
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产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2018
·
IF 7.051
Chao Shan,Jiajia Chen,Zhe Yang,Huichao Jia,Xiaohong Guan,Weiming Zhang,Bingcai Pan
Although the removal of Se(VI) from water by using zero-valent iron (ZVI) is a promising method, passivation of ZVI severely inhibits its performance. To overcome such issue, we proposed an efficient technique to enhance Se(VI) removal via pre-corrosion of ZVI with H 2 O 2 /HCl in a short time (15 min). The resultant pcZVI suspension was weakly acidic (pH 4.56) and contained abundant aqueous Fe 2+ . 57 Fe Mössbauer spectroscopy showed that pcZVI mainly consisted of Fe 0 (66.2%), hydrated ferric oxide (26.3%), and Fe 3 O 4 (7.5%). Efficient removal of Se(VI) from sulfate-rich solution was achieved by pcZVI compared with ZVI (in the absence and presence of H 2 O 2 ) and acid-pretreated ZVI. Moreover, the efficient removal of Se(VI) by pcZVI sustained over a broad pH range (3–9) due to its strong buffering power. The presence of chloride, carbonate, nitrate, and common cations (Na + , K + , Ca 2+ , and Mg 2+ ) posed negligible influence on the removal of Se(VI) by pcZVI, while the inhibitory effect induced by sulfate, silicate, and phosphate indicated the significance of Se(VI) adsorption as a prerequisite step for its removal. The consumption of aqueous Fe 2+ was associated with Se(VI) removal, and X-ray absorption near edge structure revealed that the main pathway for Se(VI) removal by pcZVI was a stepwise reduction of Se(VI) to Se(IV) and then Se 0 as the dominant final state (78.2%). Moreover, higher electron selectivity of pcZVI was attributed to the enhanced enrichment of Se oxyanions prior to their reduction.
研究领域:
环境科学
·
化学工程
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DOI
PubMed
高影响因子
EUROPEAN JOURNAL OF PHARMACEUTICAL SCIENCES
·
2014
·
IF 3.005
Shuxin Xu,Weiwei Wang,Xijing Li,Jianping Liu,Anjie Dong,Liandong Deng
As drug therapies become increasingly sophisticated, the synergistic benefits of two or more drugs are often required. In this study, we aimed at improving anti-tumor efficiency of paclitaxel (PTX)-incorporated thermo-sensitive injectable hydrogel by the synergy of burst release of doxorubicin hydrochloride (DOX⋅HCl). Thermosensitive injectable hydrogel composed of nanoparticles assembled from amphiphilic copolymer poly(ε-caprolactone-co-1,4,8-trioxa[4.6]spiro-9-undecanone)-poly(ethylene glycol)-poly(ε-caprolaone-co-1,4,8-trioxa[4.6]spiro-9-undecanone) (PECT) was fabricated. Hydrophobic PTX and hydrophilic DOX⋅HCl were loaded simultaneously in the thermo-sensitive injectable hydrogel by a two-stage entrapment. Thermosensitive gelling behaviors of drug-loading PECT nanoparticle aqueous dispersions were studied. In vitro release profiles of PTX and DOX⋅HCl and in vivo anti-tumor effect by dual drugs from PECT hydrogel were investigated. The results showed that hydrophilic and hydrophobic drugs could be successfully entrapped in PECT hydrogel simultaneously without affecting its thermo-sensitive behavior. In vitro release profiles demonstrated the burst release of DOX⋅HCl and the sustained release of PTX. Anti-tumor effect was improved by a fast and tense attack caused by the burst release of hydrophilic DOX⋅HCl from hydrogel, which was continued by the sequent sustained release of PTX-incorporated nanoparticles and remnant DOX⋅HCl. Unintentionally, entrapped in PECT hydrogel, hydrophilic DOX⋅HCl was observed to have a sustained releasing pattern in vitro and in vivo .
研究领域:
药学
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肿瘤学
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材料科学
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产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2022
·
IF 5.723
Tong Chen,Rong Wang,Chen Sun,Debao Kong,Shengyong Lu,Xiaodong Li
In this study, a series of metal-organic frameworks (MOFs) derived binary porous MnCeO x catalysts were synthesized via solvothermal method for chlorobenzene (CB) oxidation . Compared with the catalysts from co-precipitation and sol-gel method, Mn1Ce1-MOF catalyst presented the best performance with T 90% at 242 °C and highest CO x yield of 94.6% at 400 °C, owing to its micropore-enriched structure, higher lattice oxygen ratio and better surface reducibility. The HCl selectivity of Mn1Ce1-MOF reached 91.3% at 400 °C. The gaseous byproducts over Mn1Ce1-MOF catalyst were identified and the degradation pathway of CB was proposed. The catalytic activity of Mn1Ce1-MOF catalyst at 300 °C could stabilize over 75% for 40 h. The oxidation of Mn 3+ and chlorine species adsorption were considered to be the main reasons for the catalyst inactivation. This work provides a highly-efficient MOFs templated porous metal oxide for tail gas purification.
研究领域:
催化
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环境化学
·
材料科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Kexuan Hu,Yan Xu,Limei Pan,Qian Li,Yang Wang,Quan Li,Jian Yang
Ti 3 CNT x /Ti n O 2n-1 foam and Ti 3 CNT x /CNTs/Ti n O 2n-1 foam were prepared by hydrochloric acid (HCl) induced self-assembly and freeze-drying, during which oxygen-vacancies-rich Ti n O 2n-1 quantum dots in situ grown on Ti 3 CNT x nanoflakes as a result of their slight and spontaneous oxidation . The well-developed pore structure , abundant interfaces, unique dangling bonds, defects and terminated groups on highly conductive Ti 3 CNT x nanoflakes, as well as the oxygen vacancies in Ti n O 2n-1 quantum dots render the foams with superior impedance matching, intensive multiple reflection and dielectric loss . By immersing the foams into molten paraffin (absorber content: 4.2 wt%), excellent microwave absorption (MA) properties were achieved: an effective absorption bandwidth (EAB) of 5.2 GHz (1.55 mm) and a reflection loss (RL) of −81.3 dB (1.85 mm) for Ti 3 CNT x /Ti n O 2n-1 foam, and an EAB of 6.4 GHz and a RL of −54.3 dB (1.85 mm) for Ti 3 CNT x /CNTs/Ti n O 2n-1 foam (15 wt% CNTs). Moderate addition of CNTs enhanced the conduction loss and polarization loss, leading to a larger EAB. When adjusting the thickness (1.2–5 mm), the EAB of Ti 3 CNT x /Ti n O 2n-1 foam (14.7 GHz) and Ti 3 CNT x /CNTs/Ti n O 2n-1 foam (15.3 GHz) both covered the C, X and Ku band. This work offers a simple and facile method for constructing Ti 3 CNT x -based foams as excellent MA materials.
研究领域:
材料科学
·
物理学
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DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Tao Jiang,Ming Cheng,Yujiao Wang,Shaoqiang Guo,Wentao Zhou,Yafei Wang
The selective removal of neutron-absorbing fission products from spent nuclear fuel is critical for enhancing neutron economy and enabling efficient recycling. In this work, we present a novel two-step dry reprocessing strategy that integrates NH 3 /HCl gas mixture treatment with liquid Sn extraction to achieve phase-selective separation of Sm, Nd, Ru, Rh, and Pd from simulated U 3 O 8 -based spent fuel. Thermodynamic analysis and experimental validation reveal that decomposition of NH 4 Cl at elevated temperatures serves as the generator of NH 3 /HCl gas mixture capable of selectively chlorinating Sm 2 O 3 and Nd 2 O 3 into soluble chlorides while reducing U 3 O 8 to UO 2 and converting RuO 2 , Rh 2 O 3 , and PdO to their metallic states (Ru, Rh, Pd). Subsequent dissolution tests in LiCl-KCl confirm that Sm and Nd are almost completely removed, with chlorination efficiencies of nearly 100%, while uranium loss can be minimized by controlling direct NH 4 Cl contact. The coupled liquid Sn extraction at 1173 K enabled the recoveries of metallic Rh, Rh, and Pd with a promising extraction efficiency. This integrated approach significantly simplifies the partitioning of key neutron poisons (Sm, Nd, Ru, Rh, Pd) compared to conventional aqueous or pyrochemical routes, reduces secondary waste, and preserves uranium in its UO 2 form.
研究领域:
核化学
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放射化学
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核燃料循环
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材料化学
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湿法冶金
·
热力学分析
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DOI
高影响因子
危险品化学品经营许可证（带存储）