CHEMICAL PHYSICS LETTERS
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2025
·
IF 3.1
Haodong Wang,Yao Feng,Chaoqun Mu,Zhixian He,Lvling Zhong,Liang Zhang
Thermo-responsive materials represent a novel class of functional materials capable of reversible swelling, contraction, or phase transition in response to environmental temperature changes, demonstrating vast potential in environmental remediation. This study successfully synthesized a composite hydrogel with interpenetrating network structure, using sodium alginate (SA) and sodium carboxymethyl cellulose (CMC) as the matrix, and incorporating the thermo-sensitive polymer poly(N-isopropylacrylamide) (PNIPAM). The SCP composite gel enables controlled adsorption and release of Pb(II) through temperature-dependent regulation of surface hydrophilicity. At lower temperatures, hydrophilic groups are exposed on the material surface, resulting in a high Pb(II) adsorption capacity of up to 311 mg g −1 . When the temperature exceeds the lower critical solution temperature (LCST), a conformational transition occurs, leading to the concealment of hydrophilic groups and subsequent release of adsorbed Pb(II). This tunable approach ensures superior regeneration performance of the material. The reliability of the experimental data was further validated by fitting with isothermal adsorption models and kinetic models. This study has shown that SCP composite hydrogel is a cost-effective and highly efficient adsorbent for Pb(II), holding significant application value in the treatment of heavy metal wastewater.
研究领域:
环境修复
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功能高分子材料
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重金属污染治理
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吸附动力学
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水处理技术
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Sheng Cai,Yirong Zhang,Zhi ming Liu,Luming Tian,Deliang He,Ruirui Zhu,Yan Xing
In this study, a novel carbon aerogel adsorbent (Mn-PA-CS) was synthesized through a one-step calcination-activation method using manganese acetate as the precursor. Unlike conventional phytic acid-activated carbons, this work introduces manganese doping as an effective strategy to tailor the pore structure and surface chemistry. The resulting material features enriched surface P/O functional groups and a significantly increased proportion of micropores (0.7–0.8 nm), which closely match the hydration diameter of Pb(II) ions, alongside elevated defect density (ID/IG = 0.94). These modifications synergistically promote adsorption through micropore filling, electrostatic attraction, and surface complexation. The optimized Mn-PA-CS, prepared with 100 mg of manganese acetate, exhibited a high Pb(II) uptake capacity of 302.88 mg·g -1 , which represents a 132.43% improvement compared to the undoped material. The adsorption behavior followed pseudo-second-order kinetics and the Freundlich isotherm, suggesting a spontaneous, endothermic, and multilayer chemisorption process. This study indicates that transition metal doping is a promising strategy for regulating the adsorption performance of bio-derived carbon materials.
研究领域:
环境科学
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材料科学
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化学工程
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水处理技术
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产品关联
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2025
·
IF 4.7
Jing-tao Li,Zhu-yu Li,Run Zhang,Li Zhao,Qi Niu,Ying-tao Dong,Ji-hong Li,Zhi-mo Fang,Qiang Lu,Kai Li
Spent bleaching clay (SBC) is a by-product of refining edible oil. The adsorbed oil in SBC can be recycled into aromatics via catalytic pyrolysis, whereas the solid product is a biological carbon-rich clay (PBC). In order to achieve the value-added utilization of PBC, an effective method was developed to prepare clay/carbon adsorbent (SBC/C–S) with high adsorption performance, and its adsorption capability was evaluated by adsorbing Pb(Ⅱ) from simulated Pb(Ⅱ)-contaminated wastewater. PBC was activated with sulfuric acid after pyrolysis to produce SBC/C–S, while the clay structure maintained the major mineral structure. The formed carbon layer primarily contributed to the microporous structure and active sites on surface, which was conducive to the efficient Pb(Ⅱ) adsorption. The adsorption thermodynamics and kinetics of SBC/C–S were studied via fitting different mathematical models, and the results matched well with pseudo-second order and Freundlich models. The adsorption mechanism of SBC/C–S might be electrostatic attraction or chemical complexation. The adsorption capacity of SBC/C–S reached 315.60 mg/g, much higher than that of fresh and H 2 SO 4 activated bleaching clays (69.03 and 295.28 mg/g). Therefore, SBC/C–S is a potential adsorbent with great reusability for Pb(Ⅱ) removal from industrial wastewater, which achieves the recycling and effective utilization of waste material.
研究领域:
环境科学
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化学工程
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材料科学
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水污染控制
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工业废弃物管理
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产品关联
DOI
高影响因子
Lubrication Science
·
2024
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IF 1.8
Cong Liu,Yanguo Yin,Rongrong Li,Haoping Wang,Liang Li
A strategy involving the use the rare-earth compound LaF 3 with good lubrication and stability properties as a filler in the preparation of Cu-based composites was proposed to solve the problem of poor wear resistance in Pb-free Cu-Bi materials. The influence and regulatory mechanism of LaF 3 content on the mechanical and tribological properties of these composites were studied. The results indicate that LaF 3 has a good refining effect on Cu alloy grains, and LaF 3 and Bi are distributed in a network along the grain boundaries of the Cu alloy in the material. As the LaF 3 content increases, the mechanical properties and friction coefficient of the composite gradually decrease, and the wear rate first declines and then increases. The wear resistance of Cu-Bi composite containing LaF 3 mainly depends on the mechanical support provided by the matrix. When the LaF 3 content is higher than 6%, the composite strength is extremely low, and the increase in lubricant content at the friction interface does not play a decisive role in the material wear behaviour. The material wear rate increases with the increase in LaF 3 content. Therefore, using 6% LaF 3 is recommended to improve the wear resistance of the material and maintain a balance among its mechanical properties, antifriction and wear resistance.
研究领域:
材料科学
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摩擦学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Siyue Wei,Xue Chen,Guangzhi Dong,Laijun Liu,Qi Zhang,Biaolin Peng
Ferroelectric ceramic with a large electrocaloric ( EC ) effect at a very low electric field is very attractive in the next solid state refrigeration technology. In this work, two Pb(Sc 0.25 In 0.25 Nb 0.25 Ta 0.25 )O 3 (PSINT) medium-entropy ceramics were successfully synthesized by a spark plasma sintering (SPS) technology, including one-step-SPS processed and two-step-SPS processed samples. A large EC effect (△ T ∼ 0.85 K) with a high EC strength (△ T /△ E ∼ 0.021 K cm/kV) around room temperature are obtained at a very low electric field (∼40 kV/cm) in the two-step-SPS processed sample. Moreover, the working temperature range is very broad (∼120 K), which can be responsible for the high relaxation degree of the dielectric peak. It can be believed that the PSINT medium-entropy ceramics can be promising candidates for application in the next-generation EC cooling devices.
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
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IF 13.2
Gan Huang,Xin-Yi Cai,Hu Li,Jin-Rui Cai,Ying-Sen Xia,Zhi-Ping Huang,Li-Mei Lin,Fu-Bao Gong,Shui-Yuan Chen,Gui-Lin Chen
Antimony sulfide (Sb 2 S 3 ) has emerged as a promising absorber material for thin-film solar cells due to its excellent light absorption properties. However, its inherent quasi-one-dimensional crystal structure and complex defect landscape severely limit device V OC and J SC . In this study, lead-doped Sb 2 S 3 was achieved through an ion exchange method, and Sb 2 S 3 :Pb thin films were subsequently prepared via vapor transport deposition(VTD). The incorporation of Pb doping promoted preferential [hk1] orientation growth, facilitating vertical carrier transport channels across the substrate. Concurrently, it significantly reduced the Urbach energy, enhanced carrier concentration, and effectively suppressed non-radiative recombination through the formation of shallow-level Pb Sb defects alongside reduced defect density of deep-levlel Sb i . The optimized device achieved V OC of 709 mV, J SC of 12.99 mA/cm 2 , and a power conversion efficiency of 5.22%, establishing a new record efficiency for Sb 2 S 3 solar cells fabricated by VTD. This work provides an effective strategy for improving Sb 2 S 3 thin-film quality through cation doping and advances its development in photovoltaic applications.
✓ 已验证
产品关联
DOI
高影响因子
FULLERENES NANOTUBES AND CARBON NANOSTRUCTURES
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2022
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IF 2.06
Qiang Ling,Hanwen Liang,Rong Wu,Zhihao Wang,Lei Zhao,Qingping Ke,Xiangchun Liu,Ping Cui
Fluorine-doped graphene supported PbO (F-rGO/PbO) composite was prepared through a facile water bath method to study an improvement strategy for its catalytic performance in thermal decomposition of ammonium perchlorate (AP). The characterization results showed that the PbO with the size of 20 ∼ 30 nm are highly dispersed on the surface of F-doped graphene (F-rGO). Compared with other samples, the F-rGO/PbO exhibited superior catalytic performance, as 3 wt% of catalyst added in AP, the peak temperature for HTD reduced by 124°C, and the peak temperature for LTD increased by 8°C. The released apparent specific heat of the thermal decomposition of AP catalyzed by F-rGO/PbO (3603.7 J/g) is five times of that of pure AP (603.5 J/g). The doping of F atoms in graphene increased BET surface areas of the F-rGO carrier and enhanced the content of hydroxyl groups on the surface of graphene, which improved the thermal decomposition rate of AP. While the highly dispersed PbO NPs further increased BET surface areas of F-rGO/PbO to provide more active sites during the thermal decomposition of AP.
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Hui-yong Li,Deng-hui Yao,Qiu-ju Feng,Hai-bo Zeng,Jian-mei Liang,Zhi Zhou,Yun Tian,Nan Zhou,Xiang-yang Lu
Grape vine shoots were utilized as the biomass feedstock and pyrolyzed under temperatures ranging in 300°C–600°C with nitrogen atmosphere to produce biochars. The surface properties of the as-obtained biochars were characterized, followed with the careful investigation of the adsorption of lead and cadmium removal in aqueous environments. All as-prepared biochars had weak alkali characteristics and large amount of mineral species, which can greatly improve the adsorption performance. Outstanding storing capacities of 250.81, 327.31, 377.36 mg g –1 for Cd 2+ and 156.12, 237.25, 258.86 mg g –1 for Pb 2+ were exhibited by biochar pyrolyzed under 300°C, 450°C and 600°C, respectively. The adsorption equilibrium could be reached about 7 h and the suitable solution pH should be above 3. Both Langmuir and Freundlich models fitted the data well and precipitation was found to be the dominant mechanism for the adsorption of both metals. Overall, grape vine shoots are confirmed to be a promising feedstock to produce biochar sorbents of heavy metals in wastewater with excellent performance, economic cost, and easy process.
研究领域:
环境科学
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材料科学
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化学工程
·
污染控制
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Shenyi Jiang,Shuang Li,Pingbo Zhang,Hongyan Miao,Pingping Jiang,Yan Leng
Melamine sponge (MS) with open three-dimensional porous structure is regarded to be an ideal substrate to prepare monolithic adsorbents for heavy metal ions removal. However, most of the existing surface modification strategies of MS are still difficult to achieve a satisfactory adsorption ability for Pb(II). In this study, tannic acid (TA) and polyethyleneimine (PEI) were alternatively deposited on the framework of MS via layer-by-layer covalent assembly between polyphenols of TA and amine groups of PEI. The morphology, molecular structure, and overall properties of the obtained multilayer-decorated MS materials (PEI-TA) n -MS were characterized using SEM, XPS, FT-IR, and TGA . (PEI-TA) 2 -MS was demonstrated to be extremely stable and exhibited excellent adsorption behavior for Pb(II). The maximum Pb(II) adsorption capacity reached 257.4 mg/g at pH value of 5.0 and initial Pb(II) concentration of 200 mg/L. It is better than those of previous reported PEI-based adsorbents under similar conditions. The kinetic and isotherm data revealed that such process is exothermic, and well fits the Langmuir isotherm and the pseudo-second-order kinetic models. The present PEI-TA-based layer-by-layer assembly strategy may offer new prospects for the versatile design of other monolithic adsorbent materials.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
Nanoscale Research Letters
·
2012
·Vol. 7
·期 1
·1-7
·
IF 2.726
Li Wei,Xu Yaohui,Zhou Yang,Ma Wenhui,Wang Shixing,Dai Yongnian
Silica nanoparticles have been functionalized by click chemistry and atom transfer radical polymerization (ATRP) simultaneously. First, the silanized silica nanoparticles were modified with bromine end group, and then the azide group was grafted onto the surface via covalent coupling. 3-Bromopropyl propiolate was synthesized, and then the synthesized materials were used to react with azide-modified silica nanoparticles via copper-mediated click chemistry and bromine surface-initiated ATRP. Transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and thermogravimetric analysis were performed to characterize the functionalized silica nanoparticles. We investigated the enrichment efficiency of bare silica and poly(ethylene glycol) methacrylate (PEGMA)-functionalized silica nanoparticles in Pb(II) aqueous solution. The results demonstrated that PEGMA-functionalized silica nanoparticles can enrich Pb(II) more quickly than pristine silica nanoparticles within 1 h.
研究领域:
材料科学
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环境化学
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纳米技术
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分析化学
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污染治理
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Dazhong Yang,Wanwan Deng,Ao Tan,Zheting Chu,Wenfei Wei,Renji Zheng,Yangzi Shangguan,Atsushi Sasaki,Masatoshi Endo,Hong Chen
The hazardous red mud (RM) with high As/F mobility and heavy metal contaminated soil have constituted severe environmental threats. This work demonstrates a “waste to eco-material” strategy through a reliable and low-cost protonation approach to eliminate the As/F leaching risk of RM, and then recycle it as heavy metal passivators for Pb/As polluted soil remediation . The As/F anions have been immobilized by the protonated Fe/Al (hydr)oxides within RM via the formation of stable As/F compounds during the protonation process, which satisfies the requirement by the World Health Organization (As leaching <0.01 mg/L; F leaching <0.8 mg/L). Moreover, in the oilseed rape pot experiments, by adding 30 g/kg stabilized RM into Pb/As polluted soils (100 ~ 300 ppm), benefited from its large adsorption capacity, approximately 40.9 ~ 49.7% Pb and 40.8 ~ 54.8% As concentrations in the plant are reduced without adverse effects. The whole process for RM treatment and soil remediation is cost-effective, straightforward and eco-friendly without secondary pollution or soil degradation . This research provides a green chemical strategy to address both RM recycling and heavy metal contaminated soil remediation problems, which shows high economic feasibility and ecological benefits.
研究领域:
环境科学
·
土壤修复
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废弃物管理
✓ 已验证
DOI
高影响因子
Journal of Advanced Dielectrics
·
2019
·
IF 0
Peng Chen,Leiyang Zhang,Ziyang Wang,Yifei Wang,Chunlin Song,Jinzhu Hu,Gang Liu,Yan Yan
CaO doped 0.5Na 0 . 5 Bi 0 . 5 TiO 3 (NBT)-0.5SrTiO 3 (ST) were prepared by a traditional solid-reaction method under various sintering temperatures. X-ray diffraction (XRD), electron scanning microscopy (SEM), and electrical measurements were employed to check the phases, microstructures, and energy storage properties. The doping of CaO can deeply affect the relaxation nature of NBT-ST ceramics. So the energy storage performance could be modified. Specially, sample with 1 at.% CaO exhibits a high energy storage density of 1.51 J/cm 3 . Any further details can be found within this study.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
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