International Journal of Minerals Metallurgy and Materials
·
2026
·Vol. 33
·期 6
·1870-1885
·
IF 8.8
He Baili,Kou Jue,Sun Chunbao,Li Yue,Li Xiaolin,Temirov Uktam,Chang Ziyong
The development of effective adsorbents is crucial for the sustainable recovery of noble metals from secondary resources. In this study, MIL-101(Cr)-Tu, a Cr-based metal–organic framework (MOF) modified with thiourea, was successfully prepared by double-phase encapsulation followed by post-synthetic modification. At 298 K, the largest adsorption capacities of Au(III), Pd(II), and Pt(IV) by MIL-101(Cr)-Tu were (1230.83 ± 8.72), (330.41 ± 7.29), and (315.58 ± 13.67) mg·g −1 , respectively. The uptakes of Au(III), Pd(II), and Pt(IV) increased with temperature. The adsorption data fit well to both the Langmuir and pseudo-second-order kinetic models, indicating that the adsorption process conformed to monolayer adsorption and chemisorption. Mechanistic analysis revealed that the amino and thiourea groups facilitated the adsorption of noble metals through coordination and electrostatic attraction. Notably, Au(III), Pd(II), and Pt(IV) interacted strongly with the thiourea groups owing to their “soft–soft” interactions. Moreover, Au(III) was reduced to Au(I) and Au(0), Pt(IV) was reduced to Pt(II), and the amino groups were oxidized to NO 2 . The adsorption of Pd(II) did not involve redox reactions. Additionally, MIL-101(Cr)-Tu exhibited strong selectivity for noble metals and excellent reusability, demonstrating its great potential for the extraction of noble metals from secondary resources.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Xinqian Li,Jingzhou Qin,Bo Li,Yanfeng Gao,Yaping Dong,Haitao Feng
Selective vanadium extraction from ultrahigh Cr/V ratios systems remains a key challenge, particularly preventing the generation of chromium-containing solid waste, which poses substantial environmental and material-handling concerns. To enable a cleaner vanadium recovery process from chromate systems, polyethyleneimine-functionalized α -CrOOH was designed via a two-step synthesis. The resulting PEI@CrOOH, enriched with abundant –NH + =/–NH 2 + - functional groups, integrates the intrinsic structural stability of α -CrOOH with the strong chelation capability of PEI, achieving a high equilibrium adsorption capacity of 120.18 mg·g −1 for V(V). In both Cr–V binary systems and simulated chromite leaching solutions, PEI@CrOOH exhibits pronounced selectivity toward vanadium over chromium. DFT calculations further elucidate the origin of this selectivity, revealing substantially more negative adsorption energies for H 3 V 10 O 28 3 ⁻ (−478.1 kJ·mol −1 ) compared with those for Cr 2 O 7 2 ⁻ (−214.9 kJ·mol −1 ) and HCrO 4 ⁻ (−141.7 kJ·mol −1 ). The adsorption mechanism is primarily attributed to coordination interactions and redox reactions, with additional contributions from electrostatic attraction and hydrogen bonding. PEI@CrOOH demonstrates excellent reusability, maintaining high adsorption efficiency over multiple regeneration cycles. Moreover, the spent adsorbent can be sustainably upcycled via calcination into high-purity Cr 2 O 3 (99.33%), thus eliminating secondary waste generation. This work presents a technically feasible strategy for the purification and selective extraction of vanadium from chromite leaching solutions.
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2026
·Vol. 19
·期 7
·e202502250
·
IF 5.9
Junjie Zhang,Jingai Shao,Liwen Fu,Zhong Lin,Xiong Zhang,Shihong Zhang,Haiping Yang,Hanping Chen
Developing biomass-based solid acid catalysts and converting biomass-derived molecules into high-value chemicals has a dual promoting effect on the high-value utilization of waste biomass. This study introduces a groundbreaking one-pot hydrothermal strategy integrating biomass with MIL-101(Cr) precursor to fabricate hierarchical carbon-based catalysts for the highly efficient and selective dehydration of xylose to furfural, achieving 67.2%–72.0% furfural yield (a 33% enhancement over conventional biomass-derived catalysts) under optimized conditions (180°C, 3 h) in a toluene/water biphasic system. The modified hydrochar exhibits an ultra-high surface area of 2119.3 m 2 /g, abundant dual Lewis/Brønsted acid sites, and dispersed Cr 3+ active centers, enabled by synergistic MOF-templated modification engineering and biomass hydrothermal carbonization. Moreover, the correlation between the physicochemical properties and catalytic performance of modified hydrochar was analyzed. Notably, biomass feedstocks with low ash content and high nitrogen content can yield modified hydrochar with more acidic active sites, which exhibits superior catalytic activity. This study provides new ideas for the high-value utilization of waste biomass.
✓ 已验证
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xiangyu Wang,Weihong Su,Ping Ning,Iseult Lynch
To address the challenges posed by both the inherent limitations including aggregation and passivation of nano zero-valent iron (nZVI) and the treatment of acidic chromium-containing wastewater under mild conditions, a three-dimensional sulfonated covalent organic framework (SCOF) polyacrylonitrile (PAN) blended membrane loaded with nZVI (Fe 0 /SCOF-PAN) was fabricated via a green steam-assisted multiphase blending method combined with freeze-drying. Innovatively, SCOF was introduced into the PAN matrix to achieve dual modification, where the electrostatic repulsion provided by sulfonic acid groups significantly improved the dispersion of nZVI. Additionally, the membrane structure created acidic microenvironment within its cavities, effectively mitigating nZVI passivation. Experimental results demonstrated that the Fe 0 /SCOF-PAN composite exhibits excellent nZVI loading capacity and high Cr(VI) removal performance. Compared with unmodified PAN-supported nZVI, the Cr(VI) removal efficiency increased by 33.8%, and the loading capacity improved by 21.9 mg/g, while the removal efficiency remained above 90% in actual wastewater. Based on pseudo-first-order kinetics modeling, Sips isotherm analysis, thermodynamic studies, and XPS characterization, the high removal efficiency of Fe 0 /SCOF-PAN was attributed primarily to the redox reactions involving nZVI and its derived Fe 2+ species, supplemented by the active sites and functional groups of SCOF, which contributed through electrostatic attraction and chelation. This study presents a low-energy strategy for synthesizing SCOF-PAN blended membranes, offering a novel approach for designing high-performance nZVI supported materials and advancing the treatment of acidic chromium-laden industrial wastewater.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124516
·
IF 7.5
Bingkun Liu,Juncheng Guo,Hongda Huang,Yuhan Yang,Jingtao Zhang,Junling Zhang,Yonghui Zhang
Constructing a robust interfacial electric field is crucial for efficient spatial separation and directional migration of photogenerated carriers, which further boosts the performance of photocatalytic systems. In this study, a novel CF-supported SnS 2 /UiO-66-NH 2 high-low junction with intimate interface was fabricated via an in-situ solvothermal process. The optimal CF@SnS 2 /UiO-66-NH 2 -2 catalyst shows the best photocatalytic efficiency of 99.5% Cr(VI) removal at pH of 2.0 and nearly complete E. coli inactivation within 150 min, revealing its good photocatalytic redox capability. Moreover, the as-prepared composite possesses remarkable stability and desirable recycling performance. Mechanism analysis reveals that the intense internal electric field (IEF) and energy band bending are pivotal for promoting the separation and migration of charge carriers in the CF@SnS 2 /UiO-66-NH 2 high-low junction. This work offers new insights into the preparation and application of high-low junction photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Composites Science
·
2026
·Vol. 10
·期 6
·293
·
IF 4.6
Binbin Xu,Chaozhong Wang,Yang Liu,Jia Liu,Changliang Xu,Heming Wang,Longgui Peng
Coal-fired fly ash poses both environmental challenges and resource utilization potential. In this study, a fly ash-based geopolymer ecological remediation material (MFA-MB) was synthesized from fly ash and bentonite through alkaline roasting activation, montmorillonite acidification, and alkali-activated polycondensation. The structural characteristics and Cr(VI) adsorption performance of MFA-MB were systematically investigated. Compared with raw fly ash, MFA-MB exhibited a more developed mesoporous structure, increased surface activity, and enhanced specific surface area from 19.473 m2/g to 30.813 m2/g. Adsorption experiments demonstrated that MFA-MB showed enhanced Cr(VI) adsorption affinity and rapid adsorption equilibrium behavior. The adsorption process was exothermic and likely involved combined physical adsorption and surface interaction effects. Field experiments further showed that MFA-MB effectively reduced Cr(VI) accumulation in Chinese cabbage while promoting plant growth. At the optimal dosage, Cr concentrations decreased from 0.145 mg/kg to 0.015 mg/kg in roots and from 0.081 mg/kg to 0.009 mg/kg in leaves. These results suggest that MFA-MB exhibits promising potential for fly ash resource utilization and Cr(VI)-contaminated soil remediation.
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Xiaofei Fu,Junwu Tao,Zuming He,Yong Gao,Yongmei Xia,Zizhou Zhao
High-efficiency interfacial charge transfer is the key to achieve better spatial carrier separation, and thus to develop advanced heterogeneous photocatalysts for environmental remediation. However, It still remains a great challenge to design and exploit the effective charge transfer scheme. Herein, a novel Z-scheme In 2 S 3 /BiOBr with S−O covalent bonding was prepared by hydrothermal and subsequent thermal annealing methods. The obtained photocatalysts were systematically characterized and used for tetracycline hydrochloride degradation and Cr(VI) reduction in aqueous solution. As a result, the optimized In 2 S 3 /BiOBr heterostructure (IS/BOB-39) exhibited superior photocatalytic activities for tetracycline hydrochloride degradation and Cr(VI) reduction under simulated solar light irradiation compared with individual materials. The Z-scheme transfer mechanism was corroborated by trapping experiments, ESR and XPS analysis , which provided an effective transfer pathway for spatial separation of carriers. Moreover, the formation of chemical S−O bond between In 2 S 3 and BiOBr, which acted as a specific bridge to expediently transmit interfacial electrons, showed a synergistic effect with Z-scheme transfer model on the significantly enhanced photocatalytic performance. In addition, the In 2 S 3 /BiOBr heterojunction presented excellent cycle stability, resulting from the tight heterointerface. This work provides a promising approach to design and fabricate high effect Z-scheme heterojunction in wastewater treatment.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xiaohua Cao,Tianhao Ai,Zhizhi Xu,Jichang Lu,Dingkai Chen,Dedong He,Jiangping Liu,Rui Tian,Yutong Zhao,Yongming Luo
High sulfur resistance and high stability of catalysts are crucial for the catalytic decomposition of sulfur-containing volatile organic compounds. In this work, compared to 5Ce-MCM-41, the 5Cr-MCM-41 catalyst exhibited ultra-stability (no activity loss at 600 h) and higher sulfur resistance. The physical structure and chemical characteristics of the catalysts were analyzed by XRD , H 2 -TPR, NH 3 -TPD, CO 2 -TPD, XPS , and TEM. Combining the characterization results, we found that the 5Cr-MCM-41 catalyst presented outstanding catalytic performance due to superior reducibility and appropriate acidity, which results in the conversion of most of the C and S elements in the CH 3 SH to the gas-phase coke- and sulfur-containing products rather than accumulating on the catalyst surface. Meanwhile, the catalytic performance, reaction path, and deactivation mechanism of rare earth metal (Ce) and transition metal (Cr) modified MCM-41 catalysts were systematically investigated by in situ DRIFTS and DFT calculations. Additionally, a new active phase (sulfide state Cr 2 S 3 ) was proposed and proved via accurately designed experiments, which plays a significant role in the collaborative removal of CH 3 SH with hexavalent chromium (Cr(VI)). These findings are beneficial for designing high sulfur resistance catalysts for the removal of CH 3 SH and other sulfur-containing products.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2022
·
IF 6.47
Longyi Xue,Ninghan Wei,Cheng Zhao,Xiaomei Hu,Junge Yun,Zimo Chen,Zhiyi Deng,Zhihang Chen
CeO 2 as selective catalytic reduction (SCR) catalyst has attracted wide attention due to its abundant surface acidity and excellent oxygen storage/release capacity. However, its further implication was hindered owing to insufficient catalytic activity and SO 2 resistance. Novel Cr doped CeO x catalysts were synthesized by solid phase method and used for NH 3 -SCR of NO x at middle-low temperature. The effect of Cr addition on the SCR performance and physicochemical properties of CeO 2 catalyst was investigated by activity test and characterizations. Among the tested catalysts, Cr(0.4)-CeO x catalyst exhibited excellent NO x removal efficiency, with >90% NO conversion within 180–300 °C, 100% NO conversion at 220 °C and outstanding SO 2 resistance at 240 °C under 100 or 600 ppm SO 2 . The characterizations results revealed that Cr modified CrCeO x catalyst could effectively increase BET surface area, pore volume, surface acidity and redox capacity. In situ DRIFTS indicated that SCR reactions over Cr(0.4)-CeO x catalyst followed Eley-Rideal mechanism and active –NH 2 was the major intermediate species. After sulfuration, Cr(0.4)-CeO x still exhibited excellent SCR activity due to the increase of Cr 6+ , Ce 3+ and O α concentration and the formation of Cr–O–Ce bond, new Brønsted acid site and more crystallized Cr 2 O 3 .
✓ 已验证
产品关联
DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2022
·Vol. 5
·期 4
·2896-2905
·
IF 11.806
Xu Haitao,Zu Mei,Cheng Haifeng,Liu Dongqing,Xie Wei
The thermal management of electronic devices has attracted significant research attention in the recent year. However, the commonly used thermal management materials at this stage are mainly phase change materials (PCMs), which are limited by their relatively low enthalpy. In this study, the metal–organic framework MIL-101(Cr) was synthesised by an environmentally friendly and low-cost L-malic acid as the mineralising agent. The as-prepared MIL-101(Cr) composite coating was utilised as a sorbent for a passive thermal management strategy, through a vapour sorption–desorption process. By coating the as-prepared MIL-101(Cr) powder onto a metal substrate, a temperature drop for 25 min (maximum 8.6 °C) was achieved for 0.256 g of coating at a heating power of 2.5 W. The use of latent heat has emerged as an attractive method for intermittent heat dissipation. The equivalent enthalpy of the composite coating could reach as high as 1171.9 J/g coating , indicating a significant improvement in the thermal management performance compared with the conventional PCMs. Graphical abstract
Summary: A composite coating for thermal management was obtained by silicate solution and powder MIL-101(Cr).
✓ 已验证
产品关联
DOI
高影响因子
Journal of Inorganic and Organometallic Polymers and Materials
·
2022
·Vol. 32
·期 3
·840-853
·
IF 3.518
Cui Can,Xie Ya-Dian,Niu Jiao-Jiao,Hu Hai-Liang,Lin Sen
In this work, three different generations of Poly(amidoamine) dendrimers (PAMAM) decorated on magnetic Fe 3 O 4 composites (Fe 3 O 4 @SiO 2 –G1, Fe 3 O 4 @SiO 2 –G3, Fe 3 O 4 @SiO 2 –G5) were fabricated and characterized by FTIR, XRD, TEM, TGA, VSM and XPS. The obtained composites were used for Cr(VI) removal. Batch adsorption studies showed that the adsorption reached equilibrium within 60 min, and the optimal pH was 3.0. The result of adsorption kinetics was simulated by the pseudo-second-order model. The adsorption equilibrium isotherm was well fitted with the Langmuir adsorption model. Furthermore, thermodynamics calculations revealed that the adsorption process was endothermic and spontaneous. Importantly, adsorption capacity of Cr(VI) obeyed the sequence of Fe 3 O 4 @SiO 2 –G1 < Fe 3 O 4 @SiO 2 –G5 < Fe 3 O 4 @SiO 2 –G3, 3 generation of PAMAM (G3) was the optimal for adsorption capacity of Cr(VI). The maximum theoretical Cr(VI) adsorption capacity ( q m ) of Fe 3 O 4 @SiO 2 –G3 was 334.45 mg/g, and removal ration remained above 89.5% after five cycles of adsorption–desorption. Thus, Fe 3 O 4 @SiO 2 –G3 is predicted to be an efficient adsorbent for the adsorption of Cr(VI) from aqueous solution, and the obtained results can help in the generation optimization during fabrication of dendrimer modified adsorbents.
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Fenglei Sun,Zhenlei Yuan,Peng Guo,Haifeng Zhou,Jiaxuan Wang,Chuan Liao,Caoyuan Niu,Guangjun Zhou,Xiaoqiang Yu
In this study, we designed a dual functional nanosensor for detecting Cr (Ⅲ) and sodium tripolyphosphate (STPP) based on fluorescence resonance energy transfer (FRET) mechanism between amine functionalized upconversion nanoparticles (UCNPs) and gold nanoparticles (AuNPs), where UCNPs serve as energy donor and aggregated AuNPs as energy acceptor. UCNPs have red emission at 654 nm under 980 nm laser excitation and monodispersed AuNPs show strong absorbance around 520 nm. Monodispersed AuNPs form aggregate easily in the presence of Cr (Ⅲ), which leads to the red-shift of the absorption of AuNPs and quenches the red emission of UCNPs. In the presence of STPP, the formation of Cr (Ⅲ)-STPP complex weakens the aggregation extent of AuNPs and the red emission of UCNPs increases. Therefore, the content of Cr (Ⅲ) and STPP could be detected in wide range according to the linear variety of fluorescence intensities of UCNPs at 654 nm with the detection limits of 0.44 μM and 0.54 μM for detecting Cr (Ⅲ) and STPP, respectively. In addition, due to the high selectivity and accuracy for the detection of STPP, this nanosensor can be utilized to determine STPP in green tea drink and drinking water.
✓ 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）