CHEMICAL ENGINEERING RESEARCH & DESIGN
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2024
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IF 3.7
Shizhen Zhao,Kang Jing,Hui Liu
In regard to serious environmental pollution by methylene blue (MB) dye, it was crucial to design an efficacious adsorbent for the elimination of MB. Utilizing tannic acid (TA) to functionalize graphene oxide (GO) and employing acrylic acid (AA) and sodium p-styrenesulfonate (SSS) as the monomers, a pH-responsive TGO/P(SSS-co-AA) aerogel (where TGO represented TA-modified GO, and P(SSS-co-AA) denoted the copolymer of SSS and AA) was synthesized by a facile and green one-pot method. The resulting aerogel was subjected to a variety of characterizations, and its adsorption behaviors were systematically explored with MB as the model dye. The results indicated the pH-responsive TGO/P(SSS-co-AA) aerogel possessed the maximum theoretical adsorption capacity of 1782.5 mg/g, and the adsorption process could be accurately described by quasi-second order kinetics model and Langmuir model. The adsorption thermodynamics revealed that the adsorption was a spontaneous, endothermic, and entropy-increasing process. TGO/P(SSS-co-AA) aerogel exhibited highly selective adsorption property and excellent regeneration performance. Even following five regeneration cycles, adsorption capacity of the aerogel could still maintain 936.09 mg/g. In conclusion, TGO/P(SSS-co-AA) aerogel exhibited exceptional performance as an adsorbent for removing MB, providing an inspiration for the construction of GO-based composite aerogel and its actual application in efficient and selective wastewater treatment .
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
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IF 7.7
Xin Li,Kun Xu,Yiyang Bi,Dongjie He,Xin Wang,Ke Li,Qun Liu,Yu Zhang
A new HKUST-1@covalently crosslinked agarose aerogel (HKUST-1@CCAGA) was synthesized for the highly effective elimination of Methylene Blue (MB). Firstly, the covalently crosslinked agarose aerogel (CCAGA) was obtained by hydrothermal crosslinking reaction with epichlorohydrin (ECH) as crosslinker, which remained stabilized under hydrothermal and solvothermal conditions. Then, HKUST-1 was made to bind to CCAGA by in situ solvothermal assays, and the HKUST-1 loading rate reached 47.4 % based on thermogravimetric data and calculated using the cross over method. Meanwhile, the SEM exhibited the complete 3D honeycomb structure of CCAGA, and HKUST-1 particles uniformly distributed on its layers. Additionally, the specific surface area of HKUST-1@CCAGA can reached 648.59 m 2 ·g −1 . The HKUST-1@CCAGA composite was utilized for MB removal, achieving a high adsorption capacity of 424.30 mg·g −1 at pH 8. The adsorption of MB was also maintained at 80 % after 5 cycles of the experiment. The composite aerogel exhibits good recyclability and has excellent adsorption capacity.
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ACS Applied Nano Materials
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2024
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IF 5.3
Qinglin Chen,Long Tian,Ming Ruan,Yi Liu,Cheng Peng,Weigang Cui,Wei Liang,Shaoyun Shan,Tianding Hu
Fenton-like reactions with Fe-based metal–organic framework (MOF) catalysts have been extensively explored in the field of environmental remediation. However, easy precipitation of Fe2+/Fe3+ and the production of sludge under basic conditions caused catalyst loss and greatly limited their large-scale application in industry. The development of an Fe-free Fenton-like reaction is of extreme importance and remains in its infant stage. Herein, a series of Fe-free dual MOF nanoparticles (HKUST-1/ZIF-67-X) were fabricated by in situ coating of ZIF-67 on HKUST-1 and were systematically analyzed by various characterization techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), X-ray photoelectron spectroscopy (XPS), and N2 adsorption–desorption isotherms. Subsequently, these materials were applied in catalyzing methylene blue (MB) degradation. The effects of several operation parameters, i.e., pH, H2O2 dosage, catalyst dosage, and reaction temperature, on MB degradation were investigated. It was unveiled that HKUST-1/ZIF-67-7% exhibited an outstanding catalytic activity without the production of any sludge, which could reach as high as 93.29% MB degradation efficiency within 40 min. This was attributed to the unique core–satellite histoarchitecture of HKUST-1/ZIF-67-7% and the synergistic effect between HKUST-1 and ZIF-67. The HKUST-1/ZIF-67-7% composite still achieved up to 80.17% MB degradation efficiency at the fifth catalysis cycle. Importantly, HKUST-1/ZIF-67-7% exhibited significant catalytic efficiency under a wide pH range (4.2–10.1) and top catalytic efficiency at the near neutral pH value. The low cost, environment benignancy, satisfactory degradation efficiency, wide pH application range, and excellent reusability emphasize its great application potential in Fenton-like degradation of pollutants. This contribution could provide a paradigm investigation for designing non-iron-based MOF catalysts to solve the increasingly pressing pollution issues.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Meng Zhang,Yu Xue,Hongfu Zhou,Aimin Xiang,Yafeng Deng
In response to significant water pollution stemming from dyes, it is crucial to develop affordable adsorbents capable of effectively removing leftover contaminants from wastewater. A novel hydrogel, made from polyvinyl alcohol (PVA) and xanthan gum (XG), exhibiting notable swelling characteristics and adsorption abilities toward methylene blue (MB) and congo red (CR), was produced using freeze-thaw cycling and freeze-drying techniques. The stability against turbulence of the porous composite hydrogel improved from 65.73 % to 84.8 % with the incorporation of graphene oxide (GO) into the PVA/XG-based framework. We discussed and analyzed the impact of the adsorbent dosage, initial dye concentration, aqueous solution temperature, pH value, and contact time on the adsorption capacity of the prepared hydrogel. The maximum adsorption capabilities, derived from the Langmuir isotherm, were measured as 289.31 mg/g for MB and 255.06 mg/g for CR. The thermodynamic analysis indicated the spontaneous nature of the dye adsorption process conducted in this study. In conclusion, the results indicated that the synthesized hydrogel may act as a potent adsorbent for the removal of dyes from water-based solutions.
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Reaction Kinetics Mechanisms and Catalysis
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2024
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IF 1.7
Liu Zhi,Xie Shiwei,Xiao Tian,Fang Chengyi,Liu Xixiang,Liu Yan
In this study, Ti-Sn-Sb/γ-Al 2 O 3 particle electrodes were prepared by sol–gel method and a three-dimensional electrocatalytic system was constructed to treat methylene blue (MB) dye wastewater. The experimental results demonstrate that the degradation of methylene blue conforms to the pseudo-first order reaction kinetics and had a low activation energy (E a = 36.97 kJ/mol). Through quenching experiments, linear voltammetry tests, and radical trapping experiments utilizing benzoic acid as a probe, we have determined that the oxidation of MB by the particle electrode is primarily induced through direct surface electron transfer (86 ~ 88%) and surface-bound radicals (12 ~ 14%). Graphical abstract Methylene blue undergoes degradation through the synergistic interplay of direct electron transfer (86% ~ 88%) and surface-bound radicals ·OH ads (12% ~ 14%) on the particle electrode’s surface.
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JOURNAL OF MOLECULAR LIQUIDS
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2024
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IF 5.3
Xue-Min Yang,Yu-Ping Wu,Yue Qi,Meng-Ting Zheng,Fen Xie,Qian-Ting Wang,Xue-Qing Xiao,Dan Xiao
In this study, a multifunctional graphene oxide/β-cyclodextrin bionanohybrids (BWGO) was prepared successfully. The structure, morphology, adsorption capacity, solvent response, and light-driven properties of the BWGO were systematically investigated through the in-situ formation of an asymmetric gradient structure. The maximum adsorption value of BWGO based on bio-nanohybrids was 81.27 mg·g −1 for methylene blue (MB), which fitted the Langmuir isotherm in accordance with the pseudo-secondary kinetic model. Additionally, the host–guest interaction model of between BWGO and MB (in ratios of 1:1 or 1:2) was proposed by ROESY. Remarkably, the BWGO exhibited not only unique and exceptional responses to organic hazard solvents, self-driven, and photothermal responses, but also demonstrated controllable object loading and shape memory useful for soft grasping. More importantly, the related mechanisms of adsorption and behaviors driven by multiple stimuli (solvent, light) were elucidated through the host–guest interaction, wrinkled structure, gradient solvent swelling effects, and conformational changes in the macromolecular chain. This work not only introduces the multifunctional bionanohybrid materials with a wrinkled structure for the adsorption of organic dyes, but also opens avenues for potential applications in smart windows, soft grasping, and biomimetic industrial materials.
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CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Hu Chen,Minglei Teng,Qihui Hu,Xiaoliu Liang,Hui Liu,Zhenjie Li,Xing Gao,Yisheng Peng,Xiaoyong Wang,Syed Faheem Askari Rizvi,Yi Lv,Hongwei Cheng,Rui Tao,Gang Liu
Anatomical hepatectomy is a widely employed surgical technique due to its capacity to excise hepatic lesions and minimize risk variables associated with postoperative recurrence. However, preserving the anatomical and functional integrity of the liver remains a critical concern and a significant challenge in determining the boundaries of targeted liver segments. This study utilized a super-stable pure-nanomedicine formulation technology (SPFT) to synthesize methylene blue nanosheets (nanoMB) without external carrier, nanoMB did not alter the chemical composition of methylene blue (MB), it was purely a physical aggregation of molecules. The nanosize and morphology of nanoMB enhanced the internalization and retention in hepatocytes and liver tissues, addressing the limitations of unclear staining due to the rapid diffusion of MB during liver segment resection. The in vivo model of blue staining of liver segments in rats and rabbits confirmed that nanoMB can extend the staining duration of liver segments by over 3 h, whereas free MB continues for <1 min, thereby addressing the time constraints associated with liver resection. In subsequent human clinical trials, a single low-dose nanoMB injection was employed to mark hepatic segment boundaries during anatomical hepatectomy for hepatocellular carcinoma and hepatolithiasis. The boundaries continued to be distinct for over 30 min, effectively guiding the surgical resection. The postoperative liver function recovered to normal, with no complications or disease recurrence reported. In conclusion, carrier-free nanomedicine enhances hepatic visualization by improving cellular uptake and hepatic segment retention. This advancement facilitates precise surgery and establishes a new paradigm for translational research from bench to clinic.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2025
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IF 8.5
Xiubin Cui,Haitao Zhang,Jianbo Qu,Mingzhen Chao,Shanghong Ma,Qingfei Hu,Xin Yu
The development of green and cost-effective biomass adsorbents is necessary for removing large amounts of dyes from wastewater. In this study, polyurethane prepolymers were synthesized using polycaprolactone diol (OH-PCL-OH), isophorone diisocyanate, and 2,2-dihydroxymethylpropionic acid, which were subsequently dispersed in aqueous carboxymethyl chitosan (CMCS) solution to produce waterborne polyurethane (WPU)-CMCS porous materials. The adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FT-IR), thermogravimetric (TGA) and mercury intrusion porosimetry (MIP). The effects of pH, temperature, initial concentration and contact time on the adsorption properties of the adsorbents were investigated. The adsorption kinetics and isotherms were used to fit the adsorption data, and the reusability and biodegradability of the adsorbent were investigated. The results showed that the maximum adsorption capacity of WPU-CMCS 10 was 222.65 mg·g −1 and the adsorption process followed the Langmuir model. After four adsorption-resolution cycles, the removal of dyes remained at 70.36 %, whereas in the biodegradability test, the mass loss of WPU-CMCS 10 reached 43.04 % after 25 weeks, indicating that the adsorbent had good reusability and biodegradability.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Xiaoming Liu,Yuqi Liu,Nanhao Jin,Yue Zhao,Han Chen,Xinying Wang,Yuebin Feng,Huilong Luo,Wei Li
The sulfate radical-based advanced oxidation processes (SR-AOPs) have been attracting widespread attention due to their high selectivity and oxidative potential in wastewater treatment. The future SR-AOPs depend on the R & D of adequate catalysts with high activity and stability. As emerging catalysts, complexes have shown excellent performance in various fields due to their customisable structures and tunable coordination sites. In this study, a novel mixed ligand Co-CP catalyst, namely {[Co 2 (3,3′-azpd)(4,4′-oba) 2 (H 2 O) 8 ]·2H 2 O} n was assembled by using 3,3′-azopyridine and 4,4′-dicarboxydiphenyl ether as mixed ligands via the solvothermal method. The prepared Co-CP showed remarkable performance in activating peroxymonosulfate (PMS) and degrading organic dyes: it took only 14 min to catalyze the degradation of 97 % RB, 8 min to catalyze the degradation of 96 % MB, and 3 min to catalyze the degradation of 92 % MO. Its catalytic degradation efficiency exceeds that of most reported non-homogeneous catalysts. The experiments showed that the catalyst dosage, PMS concentration and the temperature all play key roles in the PMS activation. Moreover, RB degradation obeyed the pseudo-first order model with rate constant ranging from 0.0217 to 0.4639 min −1 . The prepared Co-CP showed stability after five recycling experiments, indicating that it can serve as a s highly efficient and stable catalyst for generating free radicals (such as ·SO 4 − , ·OH) to further treat organic dyes rapidly and provide more options for future wastewater treatment.
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JOURNAL OF RAMAN SPECTROSCOPY
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2025
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IF 1.9
Yiruo Zhang,Changguo Xue,Mengyu Xu,Ziyu Zhou,Congyu Zuo,Sheng Zhang
A stainless steel mesh loaded with silver nanoparticles (SSM/Ag) was developed as a low-cost and high-performance flexible surface-enhanced Raman spectroscopy (SERS) substrate for residual detection of methylene blue (MB) on curved samples. The sensor's performance was systematically investigated using rhodamine 6G (R6G) as a target molecule. The SSM/Ag substrate showed a limit of detection (LOD) of 10 −8 M and an enhancement factor (EF) of 1.4 × 10 6 . The experiment also utilized the SSM/Ag substrate to detect MB residues by wiping Alternanthera philoxeroides leaves, immersing river water samples, and performing in situ detection of the delivery label on the cup body. The results showed that the limits of detection (LODs) for these three cases were 10 −6 , 10 −7 , and 10 −7 M, respectively, exhibiting a reproducibility relative standard deviation (RSD) below 12%. This provides strong evidence for the validity and feasibility of the SSM/Ag substrate for in situ detection of MB residues on curved samples.
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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Hui Bai,Runwen Xiong,Nan Wang,Mingxia Tian,Jianbo Zhao,Fengqin Tang,Jianhui Jiang
Environmental pollution, particularly from organic dye-laden wastewater, represents an escalating global challenge, necessitating the development of efficient and sustainable remediation strategies. Herein, we report the fabrication of a rare-earth element Yb-doped TiO 2 /g-C 3 N 5 (YTCN) heterostructured photocatalyst through hydrothermal synthesis and calcination, utilizing methylene blue (MB) and rhodamine B (RhB) as representative contaminants. The YTCN composite with an optimized mass ratio of 1:3 exhibited superior photocatalytic degradation efficiencies of 96.57 % for MB and 91.82 % for RhB with a decline rate of 0.02083 and 0.01832 min −1 under 500 W xenon lamp irradiation within 105 min, corresponding to 2.2-fold and 2.1-fold improvements over pristine TiO 2 , respectively. The Construction of YTCN significantly enhances photocatalytic efficiency by enhancing the separation of charge carriers, extending light absorption into the visible region, and improving overall catalytic activity. This performance enhancement is ascribed to the cooperative interactions among Yb, TiO 2 , and CN, which raise charge generation, division, and carriage dynamics of photoinduced electrons (e − ) and holes (h + ). Furthermore, the YTCN composite demonstrated excellent recyclability and structural stability, remained close to 90 % degradation efficiency after five consecutive cycles without notable crystal degradation. These results highlight the potential of YTCN heterostructures as low-cost and robust photocatalysts for advanced wastewater treatment applications.
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International Journal of Environmental Science and Technology
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2024
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IF 3
Feng Qian,Liu Jia,Liu Zhigang,Zhou Yuhong,Zhou Yuze,Dong Zhihui,Tang Dongyan
Wastewater containing organic pollutants has created serious environmental issues and severely threatened human health due to the industry’s rapid development. Fenton processes, among the most economical advanced oxidation methods, can efficiently decompose and completely mineralize organic pollutants. Fenton processes have been widely employed in wastewater treatment to remove organic dyes; however, their practical application is limited due to the secondary pollution of Fe sludge. This work used the electrospinning technique to create Fe-alginate/PVDF nanofibers with a mass ration of 1:0.3, followed by iron ion exchange (0.08 wt%) as a photo-Fenton catalyst. The catalytic degradation of 20 mg/L methylene blue revealed that Fe-alginate/PVDF nanofibers (10 mg) had remarkable photo-Fenton catalytic performance, degrading 97.24% of methylene blue within 40 min under optimized conditions (pH of 3, H 2 O 2 concentration of 0.20 mM). Additionally, the wetting property and the development of the Fe-alginate coordination structure prevented iron leaching and strengthened the Fe-alginate/PVDF nanofibers’ structure stability, thus limiting secondary pollution of wastewater during application. Moreover, Fe-alginate/PVDF nanofibers could effectively remove MB over a wide pH range of 3.0–9.0, applied to the majority industrial wastewater (neutral or slightly acidic pH conditions). This work provides a facile strategy to prepare stable and cost-effective heterogeneous photo-Fenton catalysts, demonstrating potential applications in industrial-scale wastewater treatment.
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