Journal of Cleaner Production
·
2021
·
IF 9.297
Hong Ma,Yilin Yang,Fengyue Yin,Xiong-Fei Zhang,Jianhao Qiu,Jianfeng Yao
Metal-organic frameworks (MOFs) have been widely explored as adsorbents for heavy metal ions removal. However, the recovery and regeneration of powdery MOFs remains a huge challenge. In this work, MIL-121 (Al-based MOF) crystals were incorporated into biodegradable alginate matrix to form composite beads with enhanced recyclability and adsorption capacity . A systematic adsorption test for Cu 2+ and Cd 2+ was conducted and the optimal sample (with a MOF loading of 50 wt%) presented an adsorption capacity of 204.5 mg/g for Cu 2+ and 88.7 mg/g for Cd 2+ . Moreover, the composite beads can be regenerated effectively by hot water (80 °C). The desorption is attributed to the carboxyl-rich MIL-121, which could release massive protons (H + ) at elevated temperature. Compared with the traditional desorption using strong acids, this chemical-free thermal desorption strategy holds a great potential for adsorbent regeneration and practical wastewater treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2021
·
IF 5.455
Bing Chen,Yanhui Li,Meixiu Li,Mingfei Cui,Wenshuo Xu,Liubo Li,Yaohui Sun,Mingzhen Wang,Yang Zhang,Kewei Chen
By improving the synthesis process of MOF-525, MOF-525 was grown on the surface of graphene oxide (GO), and thus the MOF-525/GO composite was obtained for the adsorption of tetracycline (TC) in water. MOF-525 and GO can be identified on the surface of MOF-525/GO, and the BET surface area measured is up to 444.49 m 2 g −1 . MOF-525 and GO are bonded by coordination bonds, and the lattice structure of MOF-525 is retained in the composite. Both GO and MOF-525 have good adsorption properties, the maximum adsorption capacity is 236.7 mg g −1 and 371.5 mg g −1 , respectively. The maximum adsorption capacity of MOF-525/GO reaches 413.6 mg g −1 , indicating that GO does not weaken the adsorption performance of MOF-525, but further strengthens. The initial adsorption rate of MOF-525/GO for TC was very fast (the adsorption removal rate reached 47% within 2 min), and the adsorption removal amount is almost unchanged after 360 min. Elovich model and Sips model fitted the adsorption process well, revealing that the adsorption process was exothermic reaction dominated by chemisorption and the maximum adsorption capacity was 436 mg g −1 . In addition, MOF-525/GO carries a negative charge, and the adsorption performance gradually decreases with the increase of pH value. The adsorption capacity of MOF-525/GO was mainly derived from π-π stacking and hydrogen bonding , and the complexation between Zr and TC was also involved in the rapid adsorption stage.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Xiaoping Li,Xinpeng Wang,Lei Dong,Qing Zou,Chunlin He,Yanqiu Zhu,Toyohisa Fujita,Changzhong Liao,Cheng-Wei Kao,Ying-Rui Lu
As the main fission products of nuclear power plants, radioactive iodine isotopes are of great concern because of their great harm to public safety. In this work, a nanocomposite of bismuth sulfide coated with the electrospinning SiO2 nanofibers with a diameter of about 280 nm nanostructure-based membranes (Bi2S3@SiO2) was successfully prepared to dispose of gaseous iodine. Results showed that the adsorption capacity of Bi2S3@SiO2 for iodine can be up to 1180 mg g–1, which is higher than the commercial silver-exchanged zeolite (AgZ) and other bismuth-based adsorbents. Chemisorption is the major adsorption behavior of iodine capture. Thermogravimetric analysis results demonstrated that the Bi2S3@SiO2 nanocomposites were stable up to 300 °C before and after capturing iodine. X-ray diffraction results revealed that BiSI was initially formed and then transformed to BiI3. Scanning electron microscopy revealed that the sulfur element remains in the samples after interacting with iodine, and X-ray absorption near-edge spectra further confirmed that its oxidation states are a mixture of S0, S3+, and S6+. The oxidation states of bismuth and iodine are Bi3+ and I–, respectively, revealed by X-ray photoelectron spectroscopy. The reactions between Bi2S3@SiO2 nanocomposites and I2 vapor are as follows: I2 was reduced to be I– and the BiI3 crystalline phase is the final form; S2– in Bi2S3 was oxidized to higher valences (S0, S3+, and S6+), and amorphous phases are their final forms. The research results demonstrated that the nanostructure-based membranes prepared by this work would be a promising candidate nanomaterial for capturing iodine in the plant off-gas streams.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2023
·Vol. 14
·期 24
·2902-2915
·
IF 4.6
Xu Zhang,Dagang Li,Chang Cui,Shusen Chen,Meng Ji,Weiwu Tang,Le Yang,Fengqi Zhang,Jinying Li,Dongxiang Zhang,Xiyan Xu
Uranium extraction from seawater (UES) has important strategic significance as it can provide a solution to alleviate the future shortage of uranium resources for nuclear power production. This work reports an alginate-based three-dimensional (3D) supermacroporous AO-PAM/Alg hydrogel fabricated by facile cryo-polymerization and two-step grafting modification for efficient UES. The supermacroporous and 3D interconnected pore structure of AO-PAM/Alg facilitates an increased contact flux of seawater and the diffusion rate of uranyl ions. It shows a maximum uranium adsorption capacity of 1375 mg g−1 at room temperature (25 °C) and a pH of 6.0. In seawater, AO-PAM/Alg reaches adsorption equilibrium within 20 days, with a final adsorption capacity of 6.23 mg g−1. AO-PAM/Alg also exhibits considerable reusability and adsorption selectivity. The current AO-PAM/Alg hydrogel holds great potential for practical UES. The current macroporous adsorbent preparation strategy can be further applied to other 3D supermacroporous adsorbent materials.
研究领域:
材料科学
·
环境科学
·
核能工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhuoyao Fang,Kaizhen Zhang,Xiaolin Zhang,Bingcai Pan
Methylated arsenic species, including monomethyl arsenate (MMA) and dimethyl arsenate (DMA), are frequently detected in natural waters due to the biochemical methylation of arsenic and various human activities. The presence of MMA/DMA may cause excess total arsenic (>10 μg/L) in drinking water, yet the efficient removal of methylated arsenic still remains challenging. Herein, we reported the utilization of a recently developed nanocomposite HZO@N201 for selective removal of MMA and DMA from water. HZO@N201 contains the gel-type anion exchanger N201, i.e. , quaternary ammoniated poly(styrene-co-divinylbenzene) beads, as the host, and the embedded sub-5 nm hydrated zirconium oxide (HZO) for specific adsorption. In comparison with the commercially available nanocomposite HZO@D201, which was prepared through in-situ growth of HZO inside the macroporous anion exchanger D201, the adsorption capacities of HZO@N201 toward MMA and DMA ascended by ∼ 1.9 and ∼ 2.2 times, respectively, mainly benefitting from the sub-5 nm nature of HZO@N201. The competing anions including sulfate, chloride and bicarbonate exerted negligible impact on the removal efficiency toward MMA/DMA, due to inner-sphere complex formation between HZO NPs and MMA/DMA, as verified by SEM-EDS and XPS Zr 3d analysis. The exhausted HZO@N201 was fully regenerated by alkaline treatment for cyclic utilization without obvious efficiency loss. In fixed-bed experiments, HZO@N201 column was able to successively produce ∼ 4000 and ∼ 160 bed volume (BV) clean water from the feeding solutions containing MMA and DMA, while the values for HZO@D201 column were merely ∼ 1600 BV and ∼ 70 BV, respectively.
研究领域:
环境科学
·
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Pin Hou,Jiaqi Yan,Xiaoyu Yang,Ridha Djellabi,Xinrui Ge,Xinyu Sun,Jianli Jia,Jianbing Wang
Metal-organic framework (MOF)-derived carbon-based electrodes have demonstrated outstanding capacitive deionization (CDI) performance, owing to their special structures and configurations. Developing novel low-cost controllable protocols to obtain highly efficient Nitrogen-doped carbon-derived MOFs is the most challenging factor to transfer widely the application of these materials at real world. This work aims to develop a low-cost one-step growth route to produce N-doped carbon (NGZC) utilizing N-doped graphene quantum dots (N-GQDs) and zeolitic imidazolate frameworks-8 (ZIF-8) as starting substrates. The surface chemistry, morphology and CDI performance of the as-synthesized NGZC electrode were investigated, compared with conventional materials. The authors found that the introduction of N-doped graphene quantum dots dramatically enhances the mesopore volume (0.742 cm 3 /g) and pyrrolic-N ratio (19.21 %) for NGZC. These improvements effectively shorten the electron and sodium ion transport paths which in turn facilitate the pseudocapacitive activity and charge transfer in NGZC. The specific capacitance and salt adsorption capacity were found to be 283.16 F/g and 17.86 mg/g, respectively, demonstrating superior values than commonly used electrodes. NGZC shows a high stability over 30 adsorption-desorption cycles with a capacity retention of 90 %. DFT results further demonstrate the pseudocapacitive superiority of pyrrolic-N to reinforce the Na + capture. This finding provides new insights into the design of an economical and controllable N-doped carbon electrode for efficient CDI desalination.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yutao Xu,Youhui Chen,Ayoub EL Idrissi,Banlian Ruan,Longfei Ma,Teng Long,Yufan Liu,Hong Jiang,Lingbin Lu
Conventional materials for lithium-ion extraction often suffer from significant dissolution loss, the limitation of active sites, low separation efficiency, potential toxicological risks and environmental concerns. To tackle these issues and develop next-generation adsorbent, an innovative adsorbent is designed for delivering superior performance while prioritizing environmental sustainability for lithium-ion extraction in water. Remarkably, inspired by the Möbius strip, this work proposes an ingenious “opening and re-ring” strategy for expanding alginate sugar ring to crown ether ring through an oxidation and an acetal reaction with the ion template imprinting technology. This innovative process results in the development of a novel environmental-friendly and efficient Li + adsorption material. The crown-rich ether alginate aerogel showcases an ultra-high adsorption capacity up to 256.91 mg g −1 for Li + with excellent reusability and selectivity. More importantly, a proposed simple post-processing method is also beneficial for its repurposing application. Adsorption kinetics and thermodynamics reveal that the adsorption behavior is a complex mechanism involving both physical and chemical adsorption. The successful preparation of the novel adsorbent from renewable polysaccharide polymer with outstanding adsorption performances underscores the highly efficiency and sustainability. This study offers a valuable insights and new methodologies for designing efficient crown ether-based adsorbents for lithium ions from water.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2024
·Vol. 16
·期 35
·5959-5970
·
IF 2.7
Zhang Jingru,Chu Hongtao,Chen Jiaqi,Wang Qian,Qin Shili,Gao Lidi,Ma Wenhui,Li Jun,Zhao Ming,Zhang Weibing
In this study, three different materials were prepared: dendritic fiber-type silica (KCC-1), zeolitic imidazolate framework-8 (ZIF-8), and a new composite material called KCC-1@ZIF-8. These materials were synthesized using microemulsion, stirring, and coating methods, respectively. The properties of the materials were characterized using various techniques such as transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), TGA and X-ray diffraction (XRD). The results showed that KCC-1@ZIF-8 exhibited a significant increase in the BET surface area and pore size compared to the individual components KCC-1 and ZIF-8. These improved properties of the composite material were beneficial for enhancing the adsorption capacity. The effects of initial concentrations, solution pH and reaction time on the adsorption capacity were investigated. The adsorption kinetics and isothermal data of ZIF-8 and KCC-1@ZIF-8 fitted well with pseudo-second-order and Langmuir isotherm models. The results of adsorption thermodynamics show that the adsorption process is spontaneous and endothermic. KCC-1@ZIF-8 exhibited a very high adsorption capacity (751.46 mg g−1) at an initial TC hydrochloride concentration of 80 mg L−1 in an aqueous solution at 301.15 K, and the value was higher than that of ZIF-8 (549.80 mg g−1) under the same conditions. KCC-1 exhibited a relatively lower capacity (37.860 mg g−1). Based on these findings, KCC-1@ZIF-8 was considered a promising adsorbent for the treatment of wastewater contaminated with TC hydrochloride. Additionally, the composite material, when combined with high-performance liquid chromatography (HPLC), could be used as a solid-phase extraction adsorbent for the adsorption of TC hydrochloride in animal foodstuff samples. The calibration curves showed a linear range of 20–500 μg L−1, and the recovery rate ranged from 85.216% to 90.717%. No one has made adsorbents with this new structure before, and KCC-1@ZIF-8 possessed excellent adsorption properties, which make it a potential candidate for environmental remediation and analytical applications involving TC hydrochloride.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2024
·
IF 14.3
Tonghuan Liu,Yichen Hu,Junqiang Yang,Kesheng Hu,Bei Qi,Yun Zhou,Juan Tong,Man Wang,Liang Huang,Keliang Shi,Xiaolin Hou
Rapid detection and absorption of 99 TcO 4 ⁻ contamination in the environment are critical due to its high radioactivity, long half-life, and significant environmental mobility. Resins have been demonstrated effective bifunctional properties for both the detection and separation of 99 TcO 4 ⁻ . However, the poor stability of these compounds limits their practical application. Here, a chemical grafting strategy is presented to synthesize ultra-stable plastic scintillation resin, in which 4-vinylpyridine and divinylbenzene are cross-linked as matrix polymer to withstand extreme conditions and a fluorophore “shield” to convert beta radiation into detectable signals. As expected, the as-obtained resin exhibits a high adsorption capacity of 549.2 mg g ⁻¹ for 99 TcO 4 ⁻ with a rapid kinetic response of just 10 min as well as superior selectivity at 1000 times excess of interfering ions and full reusability. Moreover, it showed remarkable stability under 800 kGy, 3.0 mol L −1 HNO 3 or 2.5 L solution continuous leaching, consistently maintaining high separation and detection efficiency after recycling 10 times. This strategy paves a new way to develop stable resin for the rapid capture and accurate measurement of 99 TcO 4 ⁻ , which owns great potential for practical application.
研究领域:
环境科学
·
核化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Xianjie Wang,Long Yan,Yufei Wang,Shuaige Shi,Jian Li,Xiaoyong Fan
While phenolic porous carbons (PPCs) are commonly synthesized from single phenols, the impact of mixed phenols and ammonia on pore structure formation has yet to be fully elucidated. In this study, phenolic and ammonia components from semi-coking wastewater were used to prepare high-performance porous carbon, activated by sodium-based agents. Response surface methodology (RSM) identified optimal conditions—Na 2 CO 3 -to-resin ratio of 2.13:1, carbonization temperature of 784 °C, and activation time of 1.52 h—yielding an iodine adsorption capacity of 1046.36 mg/g. XPS analysis showed that Na 2 CO 3 activation resulted in higher retention of nitrogen, oxygen, and sulfur compared to KOH activation. This is attributed to the gentler etching effect of Na 2 CO 3 , which facilitated the formation of larger mesopores and macropores. Thermal and kinetic analysis revealed lower activation energies for Na 2 CO 3 -activated resins, especially when mixed phenols and ammonia were used as precursors. SEM and BET analysis confirmed the presence of a hierarchical pore structure. Additionally, ammonia was found to enhance pore formation, resulting in smoother and more uniform pores. These findings demonstrate the feasibility of using semi-coking wastewater as a precursor for producing sustainable porous carbon materials, offering potential applications in both environmental remediation and energy storage.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Jiayi Ai,Jianbin Li,Kai Li,Fei Yu,Jie Ma
Self-healing materials show great application potential in the field of flexible energy storage and wearable devices due to their special properties. Here, a self-healing material, application in Capacitive deionization for the first time is reported, which could autonomously self-healing damaged interfaces. We fabricated that hydrogel (MNH) composites incorporating MXene (Ti 3 C 2 T x ) by dynamic poly(vinylalcohol)-based network cross-linked by diol-borate ester bonding. The material fast restores its configuration, mechanical properties, and capacitive performances during after healing and shift different shape in the actual application environment transformation. The MNH electrode has good mechanical properties, self-healing efficiency is as high as 92%, the electrochemical healing properties is of 95.8%. The feasibility of its application in capacitive deionization was proved. The electrode performed a salt adsorption capacity of about 51 mg/g at a current density of 10 mA·g −1 and a voltage window of 1 V and showed excellent cyclic stability. Our work expands the application scenarios of self-healing materials and provides a promising approach for the development of capacitive deionizing electrodes with good self-healing properties and long life.
研究领域:
材料科学
·
能源存储
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
AICHE JOURNAL
·
2021
·Vol. 68
·期 3
·e17551
·
IF 3.993
Shi Tu,Liang Yu,Ying Wu,Yongwei Chen,Houxiao Wu,Liuqing Wang,Baoyu Liu,Xin Zhou,Jing Xiao,Qibin Xia
Developing energy-efficient alternatives for propylene (C 3 H 6 ) and propane (C 3 H 8 ) separation is of great significance and challenge in the petrochemical industry. Herein, we report the rational design of a new yttrium-based ultramicroporous metal–organic framework (MOF) comprised of 12-connected hexanuclear [Y 6 (OH) 8 (COO) 12 ] 2− cluster and 5-(3,5-dicarboxybenzoylamino)isophthalic acid (H 4 dbai) with ftw topology. It possesses a suitable pore window size and a relatively large pore volume for molecular sieving separation of C 3 H 8 from C 3 H 6 with a high C 3 H 6 capacity. At 298 K and 100 kPa, the adsorption capacity of C 3 H 6 was 2.57 mmol/g, which is the highest among the reported C 3 H 6 /C 3 H 8 molecular sieving MOF adsorbents. The molecular simulation revealed that the steric hindrance effect together with the electrostatic interaction of the oxygen sites in the window resulted in the molecular sieving separation of C 3 H 6 /C 3 H 8 . The breakthrough experiments confirmed its excellent separation performance under dynamic conditions to produce high purity (97.1%) of C 3 H 6 with a working adsorption capacity of 1.75 mmol/g.
研究领域:
化学工程
·
材料科学
✓ 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）