Journal of Materials Chemistry A
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2018
·Vol. 7
·期 2
·586-593
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IF 9.931
Tiantian Li,Qile Fang,Xianfeng Xi,Yousi Chen,Fu Liu
Solar steam generation has been developed for purification of wastewater and seawater solely by virtue of sustainable solar energy. However, multi-media treatment, especially organic solvent purification, still remains challenging. Herein, the ultra-robust solar steam generator based on carbon fibers, modified by hydrothermal carbonization, is first fabricated for highly efficient purification of multi-media systems, including dyed organic solvent, oil-in-water emulsion and seawater. The modified carbon fibers show excellent mechanical strength (∼4.77 GPa), good wettability, improved surface area and excellent light absorption (∼93%) owing to the introduction of hierarchical carbon coating. The braiding fabrics can self-pump multi-media relying on the capillary forces among polar carbon fibers. Excellent production of clean water and organic solvent with high rejection of ions (<10 ppm salt ions), oil (∼11.9 ppm oil) and dye (∼99.99%) is demonstrated. After being corroded by dimethylacetamide (DMAc) and concentrated brine for 10 days, the tensile strength of carbon fiber filament is ultra-stable. The braiding carbon fiber fabrics can produce freshwater at a rate of 5.4 kg m−2 per day from simulated Dead Seawater, enough to satisfy individual daily needs. Therefore, the carbon fiber-based materials have great application prospects for robust multi-media purification via highly efficient photothermal conversion.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2025
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IF 3.7
Biao Yuan,Fujin Sun,Pingting Chen,Kunpeng He,Pan Wu,Changjun Liu,Jian He,Wei Jiang
With the development of vanadium redox flow battery technology, the demand for pure vanadium is rapidly increasing. The separation of vanadium from vanadium–chromium leaching solutions are critical step in the production of purity-vanadium. This study presents an innovative adsorption process that utilizes amorphous ZrO 2 (AZrO) for the selective separation of V(V) and Cr(VI). In this process, a high adsorption capacity for V(V) at 64.5 mg·g –1 was achieved, while the capacity for Cr(VI) is relatively low at 24.1 mg·g –1 , demonstrating good separation performance. This is mainly caused by the large specific surface area and mesoporous structure, which are favorable for molecular diffusion and mass transfer. The kinetic analysis shows that the adsorption process follows pseudo-second-order kinetic process with chemisorption being the rate-controlling process. AZrO showed excellent separation performance in mixed solutions over a wide range of concentrations. After five cycles, AZrO retained over 73% of its capacity, indicating good stability. In mixed solutions containing up to 40 g·L –1 of V(V) and 3 g·L –1 of Cr(VI), the innovative adsorption process successfully achieved effective separation and purification. By an adsorption–desorption process using 0.1 mol·L –1 NaOH, a 99.02% V(V)-rich solution was obtained from a high concentration sodium vanadium slag leaching solution, demonstrating its effectiveness for practical industrial applications.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
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IF 8.4
Weiyi Cai,Wenwa Weng,Nigel Graham,Xun Liu,Wenzheng Yu,Kening Sun,Ting Liu
MXene (Ti 3 C 2 Tx) can be utilized to modify water-related membranes to provide favorable properties, including pronounced hydrophilicity and chemical stability, and higher flux compared with GO membranes. In order to improve the properties of composite membrane properties, new methods of modifying MXene membranes have been receiving increasing attention. Nowadays, the performance of MXene membranes is mainly limited by methods of modification and stability. In this study, a high-performance composite membrane utilizing MXene (Ti 3 C 2 T x ) was fabricated through a mild and rapid pre-oxidation method. The composite membrane had a high water permeability of ∼690 L m −2 h −1 MPa −1 , a dye rejection of ∼99.9 % and an adsorption rate of only 1 %. Compared with the unoxidized MXene membranes, the composite membranes showed improved the permeation inhibition efficiencies of 42.39 % and 37.51 % for NaCl and MgCl 2 , respectively. The rapid oxidation by Fe(III) formed a composite nano-layer of anatase TiO 2 and magnetite Fe 3 O 4 supported by carbon sheets which protected the internal Ti 3 C 2 T x from further oxidation. The characteristic morphology of a two-dimensional, layer by layer material, was maintained. In addition, the composite membrane demonstrated long-term stability in terms of both structure/appearance and flux in water. Therefore, this work presents new thoughts on the structural tuning and performance optimization of MXene (Ti 3 C 2 T x ) membranes.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2021
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IF 6.707
Qian Li,Jing Hu,Haiqiang Wang,Zhongbiao Wu
Limited light absorption and severe charge recombination have been widely acknowledged as the two main obstacles restricting the application of P25 in NO photocatalytic conversion. In this work, an advanced heterojunction photocatalyst of Bi/BiOI/black TiO 2 was synthesized via an in-situ solid-state chemical reduction method. The black TiO 2 extended the light absorption to the full spectral region. It constructed a direct Z-scheme heterojunction with BiOI nanosheets, not only promoting the charge separation, but also preserving the strong oxidation ability of photogenerated holes in black TiO 2 and strong reducing ability of photogenerated electrons in BiOI. Thus, more •O 2 − and •OH radical could form when Bi/BiOI/black TiO 2 was subjected to visible light irradiation. Besides, the introduced Bi metal nanoparticles could also enhance the light utilization and served as a cocatalyst to accept the electrons. Therefore, enhanced NO photocatalytic oxidation activity was obtained, with the optimal sample Bi/BiOI/black TiO 2 exhibiting a high NO conversion efficiency of ~70% and NO x removal of ~45%. This work may provide a refreshing perspective for the design of heterojunction photocatalysts for efficient NO photocatalytic purification and other photocatalytic applications.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Crystals
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2021
·Vol. 11
·期 3
·278
·
IF 2.589
Liangqun Yang,Hongli Suo,Lin Ma,Min Liu,Wanli Zhao,Jianhua Liu,Lei Wang,Zili Zhang,Qiuliang Wang
In this study, boron powder with different particle sizes was purified by both chemical and heat treatment methods. The reduction in the particle size can improve the chemical purification with no effort on the heat treatment. The superconducting properties of the powder drastically changed even with only a partial elimination of oxygen. On the one hand, less oxygen content resulted in highTcandJcvalues under the low magnetic field, and most importantly, a significant improvement in the superconducting connectivity (Afvalue). On the other hand, the degradation ofJcunder a high field and a change in the pinning mechanism were also found, along with decreasing oxygen. This result indicated that oxygen, probably MgO, might act as the pinning center and as an obstacle for the supercurrent in MgB2at the same time. This work paves the way for obtaining pure oxygen-free MgB2and understanding the real effect of oxygen in MgB2.Keywords:boron powder;purification;particle size;MgB2;superconducting connectivity
研究领域:
材料科学
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物理学
✓ 已验证
DOI
高影响因子
Biomass Conversion and Biorefinery
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2021
·Vol. 13
·期 2
·1199-1211
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IF 4.987
Fahim Raana,Xiwu Lu,Jilani Ghulam,Ali Farasat
The inadequate sanitation, global warming, and dwindling natural oil reserves pose significant threats to global sustainable growth. With this objective, biomass availability for bioenergy production could be ensured alternately by exploring non-conventional plant species and algae. This idea was examined by growing divergent plants and algae species separately in horizontal subsurface flow constructed wetlands and raceway ponds, later collected their biomass for bioethanol determination. Through this approach, sewage was fed to constructed wetlands and raceway ponds as influent and passed through these cultivated systems for wastewater treatment. Although all the four plant and algae species showed efficient results in sewage treatment, however, Ipomoea aquatica and Spirogyra were statistically superior to the others and produced the highest biomass yield of 4.5 and 4.1 kg m −2 , respectively. For bioethanol production, alkali–autohydrolysis combined pretreatment followed by enzymatic hydrolysis with two successive incubation periods (12 and 24 h) were employed. Results suggested that Spirogyra biomass rendered greater carbohydrate and ethanol concentration (3.7 and 1.9 mg L −1 , respectively) during 24 hours of incubation, whereas Oryza sativa acquired similar carbohydrate concentration as Spirogyra but slightly lower bioethanol yield. This study postulates, Spirogyra is promising for wastewater treatment coupled with bioethanol production. Graphical abstract
Open raceway pond and constructed wetland coupled with wastewater treatment and bio-ethanol production
研究领域:
环境科学
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生物能源
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2025
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IF 3.9
Bolun Yu,Jun Chen,Quanzhang Liu,Shuoyang Li,Xiaohang Zhang,Bowen Liang,Zuhong Lin,Haipu Li,Jingjing Yao
The use of metal–organic framework-derived materials for removing micropollutants from water is increasing, but precise composition control remains a challenge. In this study, 14 MIL-100(Fe)-derived materials were synthesized to adsorb and remove antipyrine (ANT) from water by optimizing the heating rate, pyrolysis temperature, and activation methods. The adsorbents demonstrated excellent ANT removal performance across a pH range of 3 to 11, as well as in complex water bodies. They also exhibited easy recovery and outstanding regeneration capabilities. Under the optimized conditions (i.e., ANT content: 10 mg/L, M-600–2 dosage: 0.1 g/L, and pH: 7), M-600-10 displayed the highest adsorption capacity (23.10 mg/g for ANT) while MIL-100(Fe) had limited adsorption capability (2.56 mg/g for ANT). The adsorption process was exothermic and spontaneous, influenced by both membrane diffusion and intraparticle diffusion, and followed the Freundlich and pseudo-second-order models. Despite variations in surface areas (75.70–261.91 m2/g), total pore volumes (0.2019–0.5984 cm3/g), and average pore sizes (7.47–13.99 nm), there was no strong linear relationship with adsorption capacity (7.47–15.99 mg/g). The major components, including Fe/pyrrolic N-doped graphene (PING), Fe3C/PING, Fe3O4/PING, and PING, had calculated adsorption energies of −0.94, −2.16, −0.79, and −2.24 eV, respectively, which correlated positively with Bader charge transfer numbers. The adsorbents relied on van der Waals forces for ANT adsorption, with PING exhibiting the strongest interactions and Fe3O4/PING exhibiting the weakest. These findings enhance the theoretical understanding of derived materials and expand their application in water purification.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Hongda Zhang,Guanghui Xu,Yong Yu
Photocatalytic activation of environmental-friendly and lowcost peracetic acid (PAA) is a “green” strategy for wastewater treatment. Herein, C 2 N 3 , an allotrope of g-C 3 N 4 , was prepared for the first time via a simple calcination. The C 2 N 3 /PAA/Vis system was used to degrade sulfamethoxazole (SMX) and inactivate E. coli . The SMX was completed removed within 70 min, and its degradation rate constant was 10 times that of g-C 3 N 4 /PAA/Vis system. The system showed excellent degradation performance under wastewater simulation experiments. Electrochemical and EPR experiments verified that C 2 N 3 acted as an electron donor under visible light, and its electrons were transferred to O 2 to produce O 2 – . PAA acted as another electron acceptor and accepted electrons to generate 1 O 2 via non-radical pathways. This work reveals that high–efficiency bifurcated electron transport processes enhanced the degradation of contaminants and provides a superior metal–free catalyst/matrix-material for further doping to improve the performance in other applications.
研究领域:
环境科学
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材料科学
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光催化
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Mao Fu,Xuepeng Deng,Shi-Qiang Wang,Fenglin Yang,Li-Chiang Lin,Michael J. Zaworotko,Yingchao Dong
To find sustainable water solutions, the development of high capacity, scalable robust adsorbents and mechanistic insight about their performance offers the potential to effectively address the global challenges of water scarcity and water contamination. We herein rationally design Zr-cluster defective MOF-808 (MOF-808 def ) with exposed carboxyl groups, a robust zirconium metal–organic framework (Zr-MOF), exhibiting high adsorption capacity (q max ∼ 296 mg·g −1 ) coupled with high selectivitity for tetracycline (TC) antibiotics, outperforming other water-stable MOFs, commercial and inorganic nano-adsorbents. MOF-808 def functions well across a wide range of contaminant concentrations (from trace to high-concentration) and even in harsh conditions ( e.g. , high acidity and salinity). Both experimental and simulation results indicate that the mechanism of adsorption involves both physisorption and chemisorption via hydrogen bonding, electrostatic interactions (EIs) and C-O-C covalent bonding via esterification. Computational studies confirm that hydrogen bonding plays a key role in strong guest–host interactions between TCs and MOF-808 def . Further, defects resulting from missing-Zr-clusters in MOF-808 def are confirmed to enhance adsorption performance. Specifically, the defect sites present exposed carboxyl groups from MOF-808 def linker ligands that selectively react with –OH groups (phenol and tertiary alcohol moieties) in TC via esterification. These defects drive highly selective adsorption even at low concentrations of TCs ( e.g. , 500 ppb). Aiming for more than enhanced performance, economic estimation and scalable engineered reactor tests revealed that MOF-808 def and its nano-composites are free of environmental risks and offer promise for sustainable water treatment at pilot scale. The use of defect-engineering rationales is a molecule-level design concept that could be generally useful for the development of the next generation of MOF-based nano-adsorbents for sustainable water treatment applications.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ACS ES&T Water
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2020
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IF 0
Huihui Zhao,Linyan Yang,Xueming Chen,Lankun Cai,Yejin Li,Mei Sheng,Guomin Cao,Qianhong She
The co-presence of haloacetic acids (HAAs) and Mg2+ in swimming pool waters and the potential interaction among Mg2+, HAAs, and membranes prompted a systematic investigation of membrane performance affected by Mg2+. The rejection behavior of the tight NF90 was not significantly affected by Mg2+ due to the predominant role of size exclusion. For loose NF270, HAA rejection and water flux were reduced by 27% and 12%, respectively, after the addition of 5 mM Mg2+. The notable magnesium content in NF270 exposed in Mg2+ indicated the binding of Mg2+ to membranes. The interaction between Mg2+ and membranes resulted in a less negatively charged and hydrophilic surface and a smaller effective pore radius for membranes. The reduction of the effective pore size by Mg2+ was verified as a result of competing effects between “-COO–-induced conformational change” and “cation-induced pore shielding”. The increased permeability for charged HAAs and NaCl in the presence of Mg2+ was mainly attributed to charge neutralization, while the reduced permeability for neutral surrogates and water was due to the reduced effective pore size and hydrophilicity. The underlying mechanism for resolving the interaction among different divalent cations, trace contaminants, and polyamide membranes may have significant implications for practical water purification by membrane technologies.
研究领域:
环境科学
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膜技术
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水处理工程
✓ 已验证
产品关联
DOI
CHEMICAL ENGINEERING JOURNAL
·
2016
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IF 5.31
Zhili Li,Junyi Chen,Yuanyuan Ge
Water contamination is one of the most serious problems afflicting people throughout the world, innovation of nanomaterials with eco-friendliness is important for a greener environment. Here, an eco-friendly nanocomposite based on lignin grafted carbon nanotubes (L-CNTs) is reported as a new type of adsorbent for water remediation. By integrating the tridimensional structure, oxygen-containing functional groups and eco-friendliness of lignin with the high surface area and mechanical stability of CNTs, the as-prepared nanocomposite not only possesses a good water-dispersibility and eco-friendliness, but also exhibits an excellent adsorption capability for lead ion and oil droplet. It shows a high distribution coefficient for lead ion ( K d = 3.6 × 10 5 mL/g) that is comparable to some benchmark materials, including mesoporous carbon and metal-organic frameworks. The large surface area and tridimensional structure also endows L-CNTs with a high removal efficiency for oil droplet from water. Moreover, the cost of the nanocomposite has been minimized by incorporation of the low cost lignin. These results demonstrate the as-obtained nanocomposite with a natural polymer layer has advanced adsorption capability, low-in cost and eco-friendliness, and accordingly is an ideal candidate for water cleanup.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2017
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IF 6.198
Xiaolin Zhang,Mengfei Wu,Hao Dong,Hongchao Li,Bingcai Pan
Water decontamination from As(III) is an urgent but still challenging task. Herein, we fabricated a bifunctional nanocomposite HFO@PS-Cl for highly efficient removal of As(III), with active chlorine covalently binding spherical polystyrene host for in situ oxidation of As(III) to As(V), and Fe(III) hydroxide (HFO) nanoparticles (NPs) embedded inside for specific As(V) removal. HFO@PS-Cl could work effectively in a wide pH range (5–9), and other substances like sulfate, chloride, bicarbonate, silicate, and humic acid exert insignificant effect on As(III) removal. As(III) sequestration is realized via two pathways, that is, oxidation to As(V) by the active chlorine followed by specific As(V) adsorption onto HFO NPs, and As(III) adsorption onto HFO NPs followed by oxidation to As(V). The exhausted HFO@PS-Cl could be refreshed for cyclic runs with insignificant capacity loss by the combined regeneration strategy, that is, alkaline solution to rinse the adsorbed As(V) and NaClO solution to renew the host oxidation capability. In addition, fixed-bed experiments demonstrated that the HFO@PS-Cl column could generate >1760 bed volume (BV) effluent from a synthetic As(III)-containing groundwater to meet the drinking water standard (<10 μg As/L), whereas other two HFO nanocomposites, HFO@PS-N and HFO@D201 could only generate 450 and 600 BV effluents under otherwise identical conditions.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）