JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2020
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IF 7.489
Chengwei Sun,Gang Song,Lili Chen,Xuemei Ren,Changlun Chen
Magnetic Fe 3 O 4 nanoparticles were coated by polyethyleneimine (PEI), and then Fe 3 O 4 @PEI was further modified with MoS 2 by the hydrothermal method to fabricate 3D flower-like structured magnetic polyethyleneimine@MoS 2 (MP@MoS 2 ) composites, and the composites were served as efficient adsorbents to capture Cr(VI) and Pb(II) from aqueous solution. The effects of temperature, pH, shaking time and environmental conditions on adsorption performance of MP@MoS 2 towards Cr(VI) and Pb(II) have been conducted by batch adsorption experiments. The prepared MP@MoS 2 exhibited high adsorption capacities (192.30 mg/g for Cr(VI) at pH 3.0 and 256.41 mg/g for Pb(II) at pH 6.0) and the adsorption equilibrium could be achieved in a short time. Moreover, MP@MoS 2 composites with high saturation magnetization could be simply separated under an external magnet. Combined experiments and spectral analysis, the underlying adsorption mechanism for Cr(VI) on MP@MoS 2 was mainly attributed to the reduction of Cr(VI) to Cr(III), and the removal of Pb(II) was due to the complexation with sulfur groups and amino-groups. Consequently, the prepared 3D flower-like structured MP@MoS 2 has a great potential for the practical application in removing Cr(VI) and Pb(II) from the aquatic environment.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2020
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IF 5.162
Xingtang Liang,Bin Liang,Jinyu Wei,Shuming Zhong,Ruirui Zhang,Yanzhen Yin,Yanjuan Zhang,Huayu Hu,Zuqiang Huang
As a promising candidate of Cr(VI) decontamination, cellulose is limited in the Cr(VI) uptake due to its poor accessibility. Herein, We describe the synthesis of a novel cellulose-based adsorbent (PQC, where P and QC designate the polyethylenimine and quaternized cellulose, respectively) with functional groups of quaternary ammonium and amino for enhanced capture of Cr(VI) from water. For preparing PQC, cellulose is first quaternized homogeneously, followed by grafting and/or cross-linking with polyethylenimine in the presence of epichlorohydrin. The PQC follows the Langmuir isotherm and presents a maximum Cr(VI) uptake capacity of 490.3 mg/g at 30 °C and initial pH about 2.0, much higher than many other reported cellulose-based adsorbents. The adsorption of PQC is spontaneous and endothermic, which follows the pseudo-second-order kinetic model and achieves the equilibrium after contacting about 50 min. Furthermore, the PQC, with favorable reusability, can work well in a high coexisting anion concentration. These excellent absorption performances are attributed to its physicochemical properties such as the robust porous structure and high density of functional groups including quaternary ammonium, amino and hydroxyl, which improve the availability to capture or reduce Cr(VI). This work demonstrates the significant potential of cellulose-based adsorbent for remediating aqueous Cr(VI).
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CHEMICAL ENGINEERING JOURNAL
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2019
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IF 8.355
Li Guo,Kai Lai Zhang,Huidong Shen,Chan Wang,Qiang Zhao,Danjun Wang,Feng Fu,Yucang Liang
Exploiting highly efficient and stable photocatalysts for treating Cr(VI)-containing wastewater is of great importance. Herein, a robust core-shell structurally magnetic Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x photocatalyst was successfully fabricated and used to photocatalytic Cr(VI) reduction, in which an inert protective layer (SiO 2 )-coated micro/nanostructured Fe 3 O 4 particles can not only improve the chemical stability but also retain magnetic advantage of catalyst. The optimized 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6− x F 2 x exhibited the highest catalytic activity in a reaction system of pH = 3, the apparent rate constant (k app /min −1 ) of 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x for photocatalytic reduction of Cr(VI), as high as 0.027 min −1 , is approximately 5.4 and 2.6 times higher than that of Bi 2 WO 6 and Fe 3 O 4 @SiO 2 /Bi 2 WO 6 , respectively. After being illuminated for 90 min, nearly 100% percentage of Cr(VI) has been reduced to Cr(III) by using 55% Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x as photocatalyst, which can be attributed to the synergistic effect of magnetic Fe 3 O 4 @SiO 2 support – “core”, Bi 2 WO 6 – “shell” and the successful introduction of F − ions. A readily magnetic separation of Fe 3 O 4 @SiO 2 /Bi 2 WO 6−x F 2x catalyst enabled it to reuse conveniently for practical industry application. Finally, the enhanced photocatalytic mechanism of catalyst was proposed for Cr(VI) reduction. The present study not only provides a new mean to solve the recovery of the Bi 2 WO 6 -based photocatalyst, but also presents a promising candidate for Cr(VI) reduction in the field of the industrial wastewater treatment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Fei Xue,Hui He,Hang Zhou,Zongyan Quan,Zhiping Chen,Qi Wu,Hongxiang Zhu,Shuangfei Wang
To solve the problem that cellulose-based adsorbents cannot remove Cr(VI) from water to the drinking water standard (US EPA, 0.05 mg/L) within 5 min due to imbalance of the high amine density and high-efficiency diffusion dynamics. A cellulose-based hyperbranched adsorbent (MCC/HBPA-0.88) was designed and prepared via cross-linking with microcrystalline cellulose (MCC) and amino-terminated hyperbranched polymers (HBP-NH 2 ). This strategy for liquid–solid phase one-step rapid conversion could effectively increase the conversion rate of the reactants (above 99%). The cellulose-based hyperbranched adsorbent possessed high amino density (10.63 mmol/g), high swelling rate (341%) and three-dimensional hyperbranched structure. It could rapidly and completely remove Cr(VI) from water with a low level of Cr(VI) (1.02 mg/L), and the residual Cr(VI) concentration satisfied the safe drinking level standards within 1 min, which exceeds the absorption rates of cellulose-based adsorbents that have been reported in the literatures.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
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IF 7.312
Fenglei Liu,Anjie Wang,Miao Xiang,Qingyuan Hu,Baowei Hu
Herein, a magnetic amine-functionalized mesoporous silica SBA-15 (Fe 3 O 4 @SBA-15-PDA/HBP-NH 2 ) adsorbent was fabricated by loading Fe 3 O 4 nano-particles on amino-terminated hyperbranched polymers (HBP-NH 2 ) functionalized SBA-15 and exploited for chromium (VI) and uranium (VI) elimination. The morphologies and microstructures of as-obtained materials were observed using different physicochemical and spectroscopic techniques. Meanwhile, batch experiments were performed to investigate the impacts of various water environment conditions on removal process including solution pH, equilibrium time and temperatures. The maximum adsorption capacities of U(VI) and Cr(VI) on Fe 3 O 4 @SBA-15-PDA/HBP-NH 2 reached up to 77.4 mg/g and 66.5 mg/g under optimal water environment conditions. Moreover, the characterization analysis manifested that removal of U(VI) was fulfilled through the surface complexation with amino and phenolic hydroxyl groups, while Cr(VI) were firstly electrostatically adsorbed, and subsequently reduced to less toxic Cr(III) by phenolic hydroxyl groups. These findings demonstrated that this new magnetic amine-functionalized SBA-15 could be considered as valuable materials in environmental cleanup.
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高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Zhimin Lv,Yifeng Zhang,Ming Fang,Xiaoli Tan
Exploring high-efficiency and low-cost catalysts for reducing Cr(VI) is one of the key problems in solving Cr(VI)-containing wastewater. In this paper, bimetallic Ni- and Co-based carbon sphere (Ni x Co y @NCS) was prepared by a simple hydrothermal-pyrolysis route, in which Ni-Co nanoalloys were uniformly dispersed on N -doped carbon sphere with average nanoparticles of 37.5 nm. The catalytic reduction performance of the hybrid catalyst Ni x Co y @NCS for Cr(VI) can be optimized by manipulation stoichiometry, and the catalytic ability of the Ni 1 Co 1 @NCS was much higher than that of other samples. This is because the synergy between Co and Ni NPs promotes the dehydrogenation efficiency of formic acid and the N doping improves the electron transport efficiency of the catalyst, and the strong protection of N -doped carbon for NPs ensured its excellent recycling ability and durability. In the existence of coexisting ions, the catalytic efficiency of the Ni 1 Co 1 @NCS is not affected at all. The reduction mechanism is mainly because of the active hydrogen during the dehydrogenation pathway of formic acid. This paper demonstrates that bimetallic Ni-Co-based materials have higher catalytic capacity than monometallic Ni or co-based materials.
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高影响因子
ENVIRONMENTAL RESEARCH
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2025
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IF 7.7
Soodamani Periyasamy,Jun Hou,Natrayasamy Visawanathan,Yang Li,Zijun Yang,Guoxiang You
Tetracycline antibiotic and hexavalent chromium removal from the wastewater is crucial for preventing future environmental trouble. This study aimed to develop an eco-friendly biocomposite made from an enhanced graphene oxide-functionalized hydrocalumite/cellulose composite for co-adsorbative removal of TC antibiotic and toxic Cr(VI). The synthesized GO@CellHC composite was characterized using various microscopic techniques. The GO@CellHC composite possessed the superior removal for TC and Cr(VI), achieving 27.4 and 42.6 mg/g in single systems, and 24.8 and 39.6 mg/g in binary systems, all within 40 minutes. In pH results, the maximum removal was observed at an acidic pH of 3 for Cr(VI) and 5 for TC, respectively. The co-ions results demonstrated that the composite efficiently removed both pollutants, except in the presence of PO 4 3- and CO 3 2- . The Langmuir isotherm indicated the strongest adsorption capacity and favored both systems. Thermodynamic studies revealed that the adsorption of both systems onto the GO@CellHC composite removes TC and Cr(VI) by endothermic and spontaneous system. Kinetic results demonstrated that TC adsorption shows a higher rate constant k 2 (single: 0.01676 min -1 and binary: 0.0138 min -1 ) compared to Cr(VI) adsorption (single: 0.01478 min -1 and binary: 0.01007 min -1 ). The GO@CellHC composite retained more than 80 % after three cycles, and field results suggesting that the biocomposite can be utilized for the removal of binary water pollutants.
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PubMed
高影响因子
Water Cycle
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2025
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IF 8.7
Xiaobin Zhou,Chenyu Zhou,Min Huang,Yingxue Wang,Mengxin Zhao,Yanan Zhang,Yinming Fan,Yinian Zhu,Zongqiang Zhu
Nano zero-valent iron (nZVI) has garnered significant attention as an excellent environmental remediation material for Cr(Ⅵ) adsorption. However, its practical utilization is significantly impeded by inherent limitations, notably its propensity for aggregation and susceptibility to oxidation. This study proposed an innovative approach that using zeolite imidazole framework-8 (ZIF-8) as a cladding material for encapsulating nZVI particles. This encapsulation served to safeguard nZVI from oxidation and agglomeration. Furthermore, the ZIF-8 coating possessed suitable pore channels, allowing the migration of Cr(VI) ions towards the nZVI’s surface, thereby enabling efficient reduction. The ZIF-8-coated nZVI composite (ZIF-8@nZVI) achieved a remarkable Cr(VI) removal efficiency of 98.43% under the optimized conditions. After 10 days of exposure in the aqueous solution, the efficiency remained above 84%. The uptake of Cr(VI) by ZIF-8@nZVI proceeded via a chemisorption pathway, inherently spontaneous and endothermic in character. The mechanism analysis indicated that ZIF-8 and nZVI exhibited synergistic enhancement effect on Cr(VI) removal. The protonated nitrogen groups within ZIF-8 facilitated the swift diffusion of negatively charged Cr(VI) ions to the surface of ZIF-8@nZVI. Once adsorbed, Cr(VI) was directly reduced to Cr(III) by Fe 0 , which in turn underwent oxidation to Fe(II)/Fe(III). Notably, Fe(II) indirectly reduced Cr(VI) to Cr(III), while itself being oxidized to Fe(III). Consequently, the resulting Cr(III) ions co-precipitated with Fe(III), forming hydroxide complexes that were eliminated from the aqueous environment. Overall, this research demonstrated the practicability of employing ZIF-8 as a coating material to develop highly efficient nZVI-based adsorbents and highlighted the potential of ZIF-8@nZVI in addressing Cr(VI) contamination challenges.
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高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2025
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IF 4.7
Zhuo Wang,Yihao Zhang,Wenjie Xing,Shen Zhang
In terms of the possible threats for our health, establishing efficacious strategies to determine Cr(VI) in drinking water is of significance. In this work, the fluorescence sensing of Cr(VI) was swimmingly performed based on blue-emitting carbon quantum dots (B-CQDs), which were developed using navel orange peel and N -acetyl-L-cysteine. The maximum emission wavelength was located at 433 nm when the excitation wavelength was 353 nm. After introducing Cr(VI), fluorescence quenching phenomenon was prominently displayed. Based on static quenching mechanism, a selective and sensitive fluorescence detection platform was successfully established. The wider linear range of 0–60 μM and detection limit of 0.084 μM was superior or equal to other methods. Moreover, the practical applications in real water obtained satisfactory recoveries. Taking into account the above analysis, this B-CQDs was very promising for Cr(VI) determination.
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高影响因子
Journal of Macromolecular Science Part A-Pure and Applied Chemistry
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2026
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IF 2.4
Dequan Ye,Wan Liu,Yi Tan,Luyi Niu,Dan Xie,Hongyu Chen,Jing Li,Ping Jiang
To remove hazardous Cr (VI) from wastewater, a novel 3D porous fluorescent cellulose-based hydrogel was synthesized to remove Cr (VI) from wastewater. It was created by loading carbon dots into cellulose micron fibers gel matrix via physical action and hydrogen bonds. The hydrogel’s morphology, crystalline structure, chemical composition, optical properties, sorption, and detection properties were analyzed. It exhibited good fluorescence properties with an absolute quantum yield of 15.94%. The hydrogel had a maximum adsorption capacity of 155.8 mg/g, with adsorption isotherms fitting the Langmuir model and kinetics fitting the pseudo-second-order model. It also showed selective and sensitive detection of Cr(VI) with a detection limit of 5 mg/L and an analytical linear range of 10–200 mg/L. FTIR and XPS analyses revealed that cellulose micron fibers improved adsorption ability, and carbon dots served as fluorescent probes for Cr(VI) detection. The material’s excellent mechanical properties, including a 180° anti-bending angle, 47.96% compression ratio, and 360° torsion angle, make it a candidate product that is both efficient for detection and capable of removing Cr(VI) from wastewater.
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高影响因子
Environmental Technology & Innovation
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2026
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IF 7.1
Xiaobin Zhou,Xin Wang,Mei Wang,Chenyu Zhou,Yinming Fan,Yinian Zhu,Shengpeng Mo,Yanan Zhang,Lihao Zhang,Yijian Zhong,Zongqiang Zhu
Photocatalytic reduction represents a promising strategy for remediating toxic hexavalent chromium (Cr(VI)) pollution. MIL-68(In), a typical In-based metal-organic framework, is a potential photocatalyst for this purpose. However, its efficiency is often hampered by the rapid recombination of photogenerated charge carriers and a narrow visible-light response. To address these limitations, we fabricated a MIL-68(In)/In 2 S 3 n-n heterojunction by controllably growing In 2 S 3 on the MOF substrate, aiming to achieve highly efficient Cr(VI) reduction. Under optimized reaction conditions (pH = 4, temperature 25 °C, catalyst dosage 0.2 g·L −1 , initial Cr(VI) concentration 20 mg·L −1 ), the optimized MIL-68(In)/In 2 S 3 composite achieved a Cr(VI) reduction efficiency of 94.44 % within 30 min of visible light irradiation, significantly outperforming its individual components while exhibiting excellent stability and recyclability. A series of photoelectrochemical and radical trapping experiments were conducted to reveal the enhanced mechanism of photocatalytic Cr(VI) reduction. The formed heterojunction interface broadened visible-light absorption and exhibited excellent interfacial charge transfer capability and, driven by a built-in electric field, facilitated the spatial separation of charge carriers. Consequently, photogenerated electrons migrated from MIL-68(In) and accumulate on In 2 S 3 , directly reducing Cr(VI) to Cr(III). Simultaneously, some electrons participated in the generation of superoxide radicals (•O 2 - ), which synergistically contributed to the reduction process. This work provided an effective heterojunction photocatalyst for Cr(VI) wastewater treatment and offered valuable insights for the design of MOF-based photocatalytic systems.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Shiyin Zhao,Songyang Jiang,Yuxuan Xia,Fang Wang,Yujiao Li,Zhuoliang Liu,Xin Min,Cheng-an Tao
First piezo-responsive MOF heterostructure for mechanical Cr(VI) reduction. • F-modified MOF and ZnO loading synergistically boost piezoelectric response. • Efficient piezo-catalytic interface enables ultrafast Cr(VI) reduction. • 10 ppm Cr(VI) completely reduced to undetectable level within only 15 s. Hexavalent chromium (Cr(VI)) is highly toxic and carcinogenic; its reduction to Cr(III) remains the most viable remediation strategy. Piezoelectric catalysis, which converts mechanical energy into chemical energy via built-in electric fields, offers a sustainable route for pollutant degradation. However, the application of piezoelectric Metal-Organic Frameworks (MOFs) in heavy metal reduction remains largely unexplored. Herein, we report a strategy of fluorination combine with ZnO loading to construct piezoelectric MOF heterostructures for ultrafast Cr(VI) reduction. The optimized ZnO/UiO-66-F 4 completely reduced 10 ppm Cr(VI) to below detection limits within merely 30 s under sonication, substantially outperforming pristines. Systematic characterizations and DFT calculations revealed that fluorination depresses the conduction band to −0.91 V vs. NHE, establishing a type-II staggered band alignment with ZnO that synergizes with the piezoelectric field to drive vectorial charge separation, as corroborated by markedly reduced charge-transfer resistance and prolonged fluorescence lifetime with enhanced quantum yield. Mechanistic investigations further identified the interfacial Zn Zr dual-atom site as the true catalytic center, exhibiting the strongest Cr(VI) adsorption affinity and the lowest activation energy barrier for the rate-determining step. The catalyst demonstrated exceptional durability, retaining 98.2% removal efficiency after five cycles with negligible metal leaching. This work pioneers the application of piezoelectric MOFs in heavy metal remediation and establishes a molecular-level electronic modulation strategy for mechanical-energy-driven water purification. Piezoelectric ZnO/UiO-66-F 4 heterostructure was constructed via fluorine modification coupled with ZnO loading, demonstrating superior piezocatalytic performance for Cr(VI) reduction under ultrasonic vibration. Download: Download high-res image (138KB) Download: Download full-size image
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高影响因子
危险品化学品经营许可证（带存储）