CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Yanlin Chen,Qingyan Zhang,Xijun Fu,Shuaishuai Guo,Qingyi Zeng
Hydroxyapatite (HAP) has been recognized as an effective absorbent for uranium. Recognizing and revealing its fate in coordinating with uranyl ions (U(VI)) under various conditions are vital for its practical application. In this work, HAP nanoflowers were synthesized by a simple wet chemical method, and the immobilization properties of HAP on U(VI) and U(VI) phase transformation during immobilization process were investigated systematically using a host of experimental methods and advanced characterization techniques. The results show that HAP can effectively immobilize U(VI) at high concentrations (50–3000 mg/L), with a maximum U(VI) adsorption capacity (q) of 10,200 mg/g and a distribution ratio (K d ) higher than 1.16 × 10 5 mL/g. Under the presence of sufficient U(VI) and a pH around 1.5 ∼ 3.0, HAP can rapidly react with U(VI) to form Autunite (Ca(UO 2 ) 2 (PO 4 ) 2 ·3H 2 O) with a nanoflake morphology, which is demonstrated excellently long-term stability. A moderately low pH that enables form adequately free calcium ions and phosphate groups via hydrolysis of HAP is essential to the mineralization of U(VI). This work is expected to pave the way for the use of HAP to develop highly efficient immobilization agents for the remediation of uranium-contaminated scenes and presents a comprehensive insight into the mechanisms of long-term U(VI) stabilization.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
CATALYSIS LETTERS
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2024
·
IF 2.3
Zhao Chunzhi,Mao Dongsen,Meng Tao,Guo Qiangsheng,Yu Jun
Owing to the intrinsic nature of the uniformed topologies and ultrasmall Zr 6 nodes of Zr-MOFs, herein, we employed Zr-MOFs (UiO-66 and UiO-67), as opposed to the support of traditional ZrO 2 , to prepare the Pd catalysts for toluene degradation. Compared with the catalysts of Pd/UiO-66 and Pd/ZrO 2 , Pd/UiO-67 catalyst boosted an excellence catalytic performance for toluene degradation, giving the lowest T 90% value of 235 °C with long-term stability. With the assisting of the cavity confinement of Zr-MOFs, Pd nanoparticles are prone to be encapsulated in the 3D frameworks of Zr-MOFs, and the bigger micropores of UiO-67 are more conducive to the formation of larger Pd nanoparticles. The in situ FT-IR results further declared that although the active sites are partly sacrificed due to the larger Pd nanoparticles formed in UiO-67, the stable adsorbed toluene on Pd/UiO-67 boosted the quick degradation of toluene in the reaction interval even without undergoing intermediate processes of benzoate and benzaldehyde. Graphical Abstract UiO-66, UiO-67 and ZrO 2 were employed to prepare the Pd catalysts for toluene degradation, Pd/UiO-67 catalyst boosted an excellence catalytic performance with long-term stability.
研究领域:
催化化学
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环境科学
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材料科学
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DOI
高影响因子
ELECTROCHIMICA ACTA
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2016
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IF 4.803
Linlin Zhang,Yan Gao,Xin Ding
A PMMA (polymethly methacrylate) oligomer coating photoanode sensitized with the Ru(bpy) 3 phosphoric acid derivative 1 as photosensitizer and complex 2 as water oxidation catalyst was assembled for light driven water splitting. A simple and effective method was optimized by immersing the sensitized photoanode into the DCM solution dissolving 2 wt% PMMA for 15 s. With the decorated photoanode as working electrode, the DS-PEC displayed much better long-term stability, the photocurrent density of which was found to be 0.57 mA/cm 2 after 200 s sustaining light illumination and is four times as high as the undecorated one (0.15 mA/cm 2 ).
研究领域:
材料科学
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化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
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2024
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IF 5.4
Shengxue Yan,Rui Huang,Hansai Liu,Shaohua Luo
Supercapacitors (SCs) are promising energy supply systems for various electronics. In this work, we detailed the in situ growth of FeCo2S4 on MXene for asymmetric SCs. Notably, the digital model was first built to explore the relationship between wt (FeCo2S4) and capacitance performance, realizing the maximum theoretical capacity (3635.7 F g–1) prediction. Furthermore, it was discovered that the synergistic effect of the FeCo2S4/MXene heterojunction could dramatically improve conductivity and structural stability, which accelerated charge transmission at the electrode/electrolyte interface, resulting in a significant enhancement in electrochemical performance. The FeCo2S4/MXene electrode exhibited a higher capacitance of 2415.3 F g–1 and a prominent long-term stability of about 90.5%. And the FeCo2S4/MXene//AC declared an impressive energy density of 68.7 Wh kg–1 at a power density of 800 W kg–1. The FeCo2S4/MXene composite systems have great potential for advanced SC systems due to their facile assembly and remarkable electrochemical performance.
研究领域:
材料科学
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电化学
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能源存储
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Mao Mu,Nigel Graham,Wenzheng Yu,Kening Sun,Xiyan Xu,Ting Liu
The unique layered structure and abundant 2D nanochannels of MXene membranes have demonstrated outstanding permeability, indicating their great potential in the field of water treatment . However, their unstable interlayer spacing and irregular layer structure have limited their ability to separate small molecular pollutants effectively. In this study, we successfully prepared composite MXene membranes with high rejection and low adsorption properties by exploiting the differences in the surface functional groups and chain lengths of dopamine (DA) and polyethylene glycol (PEG) through an optimal cross-linking approach. These composite membranes exhibited excellent stability in terms of interlayer spacing and mitigated the adverse effects of stacking defects. Compared to MXene membranes, the composite membranes achieved a 1.76-fold increase in dye rejection efficiency, reaching 98.7% at most, with an adsorption ratio of only 1.8%. Moreover, outstanding performances were also exhibited in pressure and concentration load tests. Furthermore, in the context of forward osmosis applications, the composite membranes demonstrated excellent Na + rejection of 99.9%. More importantly, these membranes showed no performance deterioration throughout 50 filtration cycles, with only a slight increase in permeance of 19.3% over a 38-day testing period. Thus, this work presents a novel solution for fabricating MXene composite membranes with low swelling, minimal defects, and high stability, enhancing its potential in the field of water and wastewater treatment .
研究领域:
材料科学
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水处理工程
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环境科学
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DOI
高影响因子
Materials Today Energy
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2023
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IF 9.3
Man Zhou,Suting Xue,Qin Feng,Xuan Liang,Wangchen Wu,Yanli Zhou,Minmin Ni,Xudong Zheng,Song Xu,Jin Zhao,Zhongyu Li
Noble metal nanoparticles (NMNPs) modified semiconductors play important roles in heterogeneous catalysis . However, for the ultra-small NMNPs (<5 nm) on TiO 2 , the problems of easy agglomeration and quick deactivation highlight the need for highly efficient protection of ultra-small NMNPs. Here, we introduce a novel structure of carbonized liquid crystals (CLCs) protected Pt NPs on TiO 2 , which involves in-situ photo-reduction of chloroplatinic acid to ultra-small Pt NPs in lamellar liquid crystals. According to the results of morphological structures, CLCs changed the contact type of Pt/TiO 2 from ‘face-contact’ to ‘point-contact’, which was consistent with our simulation results. Compared with the bare Pt/TiO 2 , the visible-light photocatalytic H 2 production rate of C–Pt/TiO 2 exhibited 1.75-fold enhancement under the protection of CLCs (26.73 mmol g −1 h −1 vs. 15.26 mmol g −1 h −1 ). Especially, the marriage of CLCs and the traditional Pt/TiO 2 photocatalyst achieved long-term stability, which remained 87% of the original rate at the sixth cycle.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Jin-Long Fan,Sheng-Bo Liu,Ming-Liang Chen,Zhangxiong Wu,Sheng-Peng Sun,Yao-Yin Lou
Electrocatalytic reduction of nitrate (NO3−) to ammonia (NH3) is garnering increasing interest due to its potential to reduce CO2 emissions as a substitute for the Haber-Bosch process, while also mitigating NO3− pollution. However, it remains a challenge to achieve a current density exceeding 300 mA cm−2 while maintaining the stability of catalysts. Additionally, the anodic oxygen evolution reaction, characterized by slow kinetics and high energy barriers, severely impedes the widespread adoption of NH3 formation from NO3− reduction. Therefore, in this study, we introduce amorphous phosphorus-doped cobalt catalysts (Co–P@NF) prepared via a facile electrodeposition process for efficient NO3− reduction and hydrazine oxidation. The incorporation of phosphorus in Co–P@NF facilitates electron migration from phosphorus to cobalt, enhancing *H provision for efficient hydrogenation of the intermediate *NO2−. This results in a current density of 2 A cm−2 at −0.3 V, with a faradaic efficiency for NH3 of 91% in an electrolyte containing 1 M NO3−. Moreover, the Co–P@NF catalyst exhibits remarkable long-term stability, maintaining an NH3 faradaic efficiency exceeding 90% and a current density of 799 mA cm−2 after 82 hours of electrolysis. Furthermore, Co–P@NF displays high catalytic activity in promoting the rate-determining step of hydrazine oxidation, from *N2H2 to *N2H. The incorporation of the HzOR (hydrazine oxidation reaction)-assisted NO3−RR (nitrate reduction reaction) unit significantly reduces the cell voltage to 0.34 V at 300 mA cm−2.
研究领域:
环境科学
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材料科学
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电化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2024
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IF 6.3
Jinqian Zhang,Jun Liu,Yue Tian,Jiawen Guo,Wenjie Kong,Lizhen Long
Two-dimensional (2D) materials have emerged as promising candidates for photodetection applications, due to their unique structural and optical properties. Herein, we conducted a comprehensive investigation of the 2D Te-based photodetector. The crystal structure, angle-resolved polarized Raman (ARPR) spectroscopy, and theoretical analysis demonstrate the in-plane lattice anisotropy of Te, underlining its suitability for polarization-dependent photodetection. Photocurrent measurements over a broad spectral range (from 365 to 1310 nm) reveal excellent photoresponse characteristics, with responsivity ( R λ ) and detectivity ( D* ) values reaching up to 1189 A/W and 11.51 × 10 8 Jones, respectively, under 1064 nm illumination. Furthermore, the Te-based photodetector exhibits superior stability, retaining approximately 90 % of its initial performance after six months of ambient exposure. Polarization-sensitive photodetection experiments show significant dichroism ratios (up to 4.6 for 1064 nm illumination), emphasizing the potential of 2D Te for advanced polarization applications. The combination of the broad spectral response, high anisotropy ratio, and long-term stability positions 2D Te as a promising candidate for future photodetection technologies.
研究领域:
材料科学
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光学工程
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DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2015
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IF 2.169
Wenfei Shen,Chunpeng Yang,Xichang Bao,Liang Sun,Ning Wang,Jianguo Tang,Weichao Chen,Renqiang Yang
A simple, solution-processed ultrathin CuO X anode buffer layer was fabricated for high performance organic solar cells (OSCs). XPS measurement demonstrated that the CuO X was the composite of CuO and Cu 2 O. The CuO X modified ITO glass exhibit a better surface contact with the active layer. The photovoltaic performance of the devices with CuO X layer was optimized by varying the thickness of CuO X films through changing solution concentration. With P3HT:PC 61 BM as the active layer, we demonstrated an enhanced PCE of 4.14% with CuO X anode buffer layer, compared with that of PEDOT:PSS layer. The CuO X layer also exhibits efficient photovoltaic performance in devices with PBDTTT-C:PC 71 BM as the active layer. The long-term stability of CuO X device is better than that of PEDOT:PSS device. The results indicate that the easy solution-processed CuO X film can act as an efficient anode buffer layer for high-efficiency OSCs.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Polymers
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2022
·Vol. 14
·期 21
·4700
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IF 4.967
Xinyang Zhang,Xinyang Wang,Jian Li,Shuo Zhang,Qingxin Zhang,Xiaoyan Yu
A phthalonitrile monomer (DPTP) containing pyridine with sulfide bonds was prepared and cured into polymers using different curing agents under the same temperature-programmed process. We characterized and comprehensively evaluated the effects of different curing agents on the thermal and thermomechanical properties of phthalonitrile resin, showing that the DPTP monomer cured with naphthalene-containing curing agent exhibited the best performance among the three polymers. Differential scanning calorimetric (DSC) investigation manifested that the melting point of the DPTP monomer was 61 °C, with a processing window of about 170 °C, suggesting the presence of a wide processing range. Thermogravimetric analysis (TGA) demonstrated the outstanding heat resistance,T5%, of 460 °C in nitrogen, at the same time demonstrating superior long-term stability compared with other commonly used polymer materials, which proves the long-term usage under high temperatures of 300 °C. Dynamic mechanical analysis (DMA) revealed that the storage modulus at 50 °C was 3315 MPa, and the glass transition temperature (Tg) of the polymer was more than 350 °C. Therefore, DPTP resins have favorable thermal stability as well as prominent thermomechanical properties.Keywords:phthalonitrile resin;processing window;low melting point;long-term stability
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Siqi Gong,Fan Zhao,Yaning Zhang,Huiting Xu,Meng Li,Junjie Qi,Honghai Wang,Zhiying Wang,Yuqi Hu,Xiaobin Fan,Wenchao Peng,Chunli Li,Jiapeng Liu
MXene has drawn considerable attention in energy storage due to particular physicochemical properties. At present, among most near-ambient temperature preparation methods, water is usually served as the main solvent. However, MXene is usually subjected to fast structural degradation on account of water molecules attacking in aqueous solution. Herein, we report a novel water-free etching strategy for synthesizing few-layered Ti 3 C 2 T x MXenes in deep eutectic solvents at near-ambient temperature. Benefitting from the absence of water and macromolecular structure of deep eutectic solvents, the as-synthesized few-layered Ti 3 C 2 T x (DES-Ti 3 C 2 T x ) MXene presents abundant −O terminations and low oxidation degree. As a consequence, the DES-Ti 3 C 2 T x MXene displays excellent specific capacitance of 320 F/g at 2 mV/s. Impressively, the DES-Ti 3 C 2 T x MXene exhibits splendid long-term stability that 97% specific capacitance retention can be acquired over 50 000 cycles at high current density of 50 A/g. Therefore, this study offers a new thought for preparing high performance MXene-based materials by water-free etching method.
研究领域:
材料科学
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能源存储
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Photonics Research
·
2023
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IF 3.7
Yaoyu Liu,Tianyu Wang,Zongshuai Ji,Guanfeng Liu,Yunhe Chen,Xin Ding,Bing Teng,Shaohua Ji
Cs 3 Cu 2 Cl 5 is unstable owing to ionic migration and lattice decomposition in the atmosphere. In addition, obtaining large bulk single crystals of Cs 3 Cu 2 Cl 5 is challenging. Herein, a novel strategy is proposed for synthesizing a Cs 3 Cu 2 Cl 5 single crystal that exhibits excellent crystallinity and photoluminescence (PL) properties using an antisolvent-assisted method. Na + is doped into the Cs 3 Cu 2 Cl 5 lattice to replenish the lattice defects caused by chlorine vacancies, thus leading to stronger chemical interactions between Cu + and Cl − ions. Moreover, Na + doping circumvents ionic migration and lattice decomposition, thereby enhancing the PL intensity and maintaining the long-term stability of Cs 3 Cu 2 Cl 5 in the atmosphere. Incorporating 10% Na + into the Cs 3 Cu 2 Cl 5 lattice enhances the PL intensity by 18%, and the high-stability PL can maintain more than 48.5% of the PL intensity after 90 d in an atmospheric environment. In addition, a white light-emitting device (LED) is fabricated using the 10% Na + -doped Cs 3 Cu 2 Cl 5 crystal powder and it exhibits a high color-rendering index (93.7) and correlated color temperature (7120 K). Additionally, it exhibits superior stability, even at a high temperature of 120 °C. Thus, the excellent high-temperature stability of Cs 3 Cu 2 Cl 5 can promote its practical application in LED.
研究领域:
材料科学
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光学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）