Results in Engineering
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2025
·
IF 7.9
Xie Yuen Gok,Hui Shen Lau,Can Zeng Liang,Wai Fen Yong
Lithium is a critical resource widely used in batteries, electronics, and industrial applications due to its energy storage capabilities. Ion-sieving adsorption, utilizing manganese- and titanium-based lithium ion sieves (LISs), is a common recovery method offering high recovery efficiency and ease of operation. However, manganese-based LISs are not stable in acidic conditions, leading to dissolution during the regeneration. Additionally, conventional powdery LISs are difficult to regenerate and recycle, resulting in significant waste and secondary pollution. Herein, this research aims to synthesize granulated chitosan/titanium-based LISs (CS/Am-HTO) with improved stability and faster lithium uptake rates using amorphous titanium oxide (TiO 2 ) as the precursor. The CS/Am-HTO demonstrate high adsorption efficiency, achieving equilibrium within 8 h with a Li + uptake of 43.20 mg/g. The adsorption behavior aligns well with pseudo-second-order kinetic and Freundlich isotherm models. Notably, the beads demonstrated stable adsorption performance and physicochemical durability, with a Ti 4+ dissolution rate as low as 2.8% even after six regeneration cycles under acidic conditions. The findings of this project are expected to inspire further development of LIS granulation using alternative binders to enhance adsorption performance and support continuous lithium extraction process.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2023
·
IF 9.5
Junxiang Zhang,Zeyu Cheng,Xinbo Qin,Xi Gao,Rongping Yun,Xu Xiang
Salt lake brine has become a promising lithium resource, but it remains challenging to separate Li+ ions from the coexisting ions. We designed a membrane electrode having conductive and hydrophilic bifunctionality based on the H2TiO3 ion sieve (HTO). Reduced graphene oxide (RGO) was combined with the ion sieve to improve electrical conductivity, and tannic acid (TA) was polymerized on the surface of ion sieve to enhance hydrophilicity. These bifunctional modification at the microscopic level improved the electrochemical performance of the electrode and facilitated ion migration and adsorption. Poly(vinyl alcohol) (PVA) was used as a binder to further intensify the macroscopic hydrophilicity of the HTO/RGO-TA electrode. Lithium adsorption capacity of the modified electrode in 2 h reached 25.2 mg g–1, more than double that of HTO (12.0 mg g–1). The modified electrode showed excellent selectivity for Na+/Li+ and Mg2+/Li+ separation and good cycling stability. The adsorption mechanism follows ion exchange, which involves H+/Li+ exchange and Li–O bond formation in the [H] layer and [HTi2] layer of HTO.
研究领域:
材料科学
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电化学
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环境工程
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
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IF 8.4
Jinyuan Hu,Boru Cai,Yaohui Wang,Zhengran Bian,Tianle Hou,Yanwei Sun
Amorphous metal–organic frameworks (MOFs) present significant potential for achieving high permeability and selectivity in separation applications. However, developing effective fabrication strategies for amorphous MOF membranes with well-defined channels remains a considerable challenge. In this study, amorphous titanium-based MOF membranes with concurrently optimized intercrystalline and intracrystalline selective transport channels were successfully prepared. The resulting membranes exhibited exceptional sieving performance for dyes with molecular weight cutoff of 600 Da. Additionally, defect-rich dual water channels within and between the amorphous MOF aggregates led to a remarkable water permeances up to 107.4 L m −2 h −1 bar −1 , significantly surpassing the benchmarks set by other nanofiltration membranes. This work offers valuable insights into the influence of amorphization on the design of a wide variety of MOF membranes, paving the way for advanced separation applications.
研究领域:
材料科学
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化学工程
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环境科学
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产品关联
DOI
高影响因子
Journal of Energy Chemistry
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2020
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IF 7.216
Xiao Liu,Peijie Fan,Liangping Xiao,Jian Weng,Qingchi Xu,Jun Xu
The generation of green hydrogen (H 2 ) energy is of great significance to solve worldwide energy and environmental issues. Reduced Ti based photocatalyst has recently attracted intensive attention due to its excellent photocatalytic activity, while the synthesis of reduced Ti based photocatalysts with high stability is still a great challenge. Here, we report a facile method for synthesis of reduced Ti metal organic frameworks (small amounts of Pt incorporated) encapsulated BP (BP/R-Ti-MOFs/Pt) hybrid nanomaterial with enhanced photocatalytic activity. The strong interaction between Ti and P reduces the valence state of the binding Ti 4+ on the BP surface, forming abundant reduced Ti 4+ within R-Ti-MOFs/BP. Such reduced Ti 4+ render R-Ti-MOFs/BP efficient charge transfer and excellent light absorption capability, thus promote the photocatalytic H 2 production efficiency. Furthermore, the Ti-P interaction stabilizes both reduced Ti 4+ and BP during the photocatalytic reaction, which greatly enhanced the stability of the obtained BP/R-Ti-MOFs/Pt photocatalyst.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2015
·Vol. 19
·期 6
·1827-1831
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IF 2.446
Hou Junke,Song Jie,Niu Yubin,Cheng Chuanjun,He Hong,Li Yutao,Xu Maowen
P2-type Na 0.67 Ni 0.33 Ti 0.67 O 2 is explored as a titanium-based anode material for sodium ion batteries. The as-prepared Na 0.67 Ni 0.33 Ti 0.67 O 2 delivers a reversible capacity of 129.2 mAh g −1 at 0.05 C with smooth charge–discharge curves. A simple carbon-coating technique was used to improve the electronic conductivity of Na 0.67 Ni 0.33 Ti 0.67 O 2 particles. The carbon-coated Na 0.67 Ni 0.33 Ti 0.67 O 2 delivers a higher reversible capacity of 163.7 mAh g −1 and exhibits better rate capability than the as-prepared Na 0.67 Ni 0.33 Ti 0.67 O 2 .
研究领域:
电化学储能
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无机非金属材料
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能源材料
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功能陶瓷
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二次电池技术
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2023
·Vol. 48
·期 6
·2496-2504
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IF 3.3
Jiao Wu,Bingbing Chen,Aihu Feng,Kun Liu,Yun Yu
Capacitive deionization is a promising solution for freshwater production with Ti3C2Tx emerging as a momentous electrode material. Here, highly porous 3D nitrogen-doped Ti3C2Tx (3D-N-Ti3C2Tx) is developed by using electropositive melamine to electrostatically induce electronegative Ti3C2Tx nanosheets to be reconstructed to alleviate the severe stacking problem of Ti3C2Tx layers. 3D-N-Ti3C2Tx has a large specific surface area (129.48 m2 g−1) and pore volume (0.372 cm3 g−1), exposing numerous ion adsorption sites. Also, 3D-N-Ti3C2Tx achieves nitrogen doping, which greatly improves the hydrophilicity and electrical conductivity. With the combined advantages of a three-dimensional structure and nitrogen doping, 3D-N-Ti3C2Tx achieves a specific capacitance of 101.9 F g−1 in 1 mol L−1 NaCl solution and demonstrates fantastic desalination performance with a high desalination capacity of 31.51 mg g−1, surpassing those of the majority of reported Ti3C2Tx electrodes, and outstanding desalination cycling stability in 500 mg L−1 NaCl solution at 1.2 V. This work significantly contributes to the advancement of Ti3C2Tx electrode material in CDI.
研究领域:
材料科学
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环境工程
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电化学
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2020
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IF 7.632
Chu Qi,Lin Xu,Jia Wang,Huilan Li,Chengcheng Zhao,Lina Wang,Tianxi Liu
The shuttling of polysulfide intermediates (Li2Sn, 2 < n ≤ 8) and the dendrite growth on the Li-metal surface have blocked the practical applications of lithium–sulfur (Li–S) batteries. Functionalizing the separator provides a straightforward approach to address these issues. Herein, we demonstrate a multifunctional MIL-125(Ti)-modified polypropylene/polyethylene separator for advanced Li–S batteries. The MIL-125(Ti), a Ti-containing metal–organic framework (MOF), features an open-skeleton construction, a high intrinsic microporosity and a Lewis acid characteristic. Compared with pristine separator, that with MIL-125(Ti) coating shows better electrolyte wettability and less resistance. The unique coating layer acts as an effective physical and chemical barrier region to capture polysulfide species without affecting the smooth transport of Li+. Meanwhile, the highly ordered micropores with a diameter of ∼1.5 nm in the MOFs guide in a homogeneous Li+ plating and thereby inhibit lithium dendrites. Consequently, the MOF-modified separator enables a significantly improved cycling stability and rate capability of the Li–S battery. The capacity retention of over 60% at 0.2 C (1 C = 1675 mA g–1) upon 200 cycles and a specific capacity of 612 mAh g–1 at 2 C is realized. The facile approach offers an effective pathway toward high-performance Li–S batteries.
研究领域:
材料科学
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电化学
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DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Yanling He,Xiaoqing Hu,Muxian Xu,Alan Man Ching Ng,Aleksandra B. Djurišić
We synthesized mesoporous silica nanospheres (MSNs) with small particle size (under 100 nm) and large surface areas (>800 m 2 /g) by modified Stöber method. We investigated coating of oxygen adsorber materials (iron-based and titania-based) by atomic layer deposition on the prepared MSNs. We found that MSNs without any coating are capable of adsorbing oxygen by physisorption , and that due to their high surface areas they can outperform commercial oxygen scavengers for atmospheres with moderate and low humidity levels. Their performance is further enhanced for optimized thickness of FeO x or TiO x coating, where chemisorption contributes to oxygen scavenging process. To further investigate the oxygen adsorption on MSNs, samples with different annealing times were prepared and characterized, and the oxygen adsorption could be attributed to incomplete removal of silicon precursor residue. While the samples with prolonged annealing time do not exhibit oxygen adsorption, the high oxygen adsorption capacity can be restored by glucose treatment which results in carbon-based surface coating of MSNs. Due to their fast response and high oxygen adsorption capacity, the prepared materials are highly promising as oxygen scavengers, in particular for applications in dry environments where humidity activation is undesirable.
研究领域:
材料科学
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纳米技术
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表面化学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Xiaoyu Ma,Yan Zhang,Awu Zhou,Yutong Jia,Zhenghe Xie,Lifeng Ding,Jian-Rong Li
Rational regulation of interface structure in photocatalysts is a promising strategy to improve the photocatalytic performance of carbon dioxide (CO 2 ) reduction. However, it remains a challenge to modulate the interface structure of multi-component heterojunctions. Herein, a strategy integrating heterojunction with facet engineering is developed to modulate the interface structure of metal–organic frameworks (MOF)-based heterojunctions. A series of core–shell UiO-66 (Zr-MOF)-loaded MIL-125 (Ti-MOF) heterojunctions with exposed specific facets were prepared to enhance the separation efficiency of photogenerated electrons-holes in CO 2 photoreduction. Impressively, MIL-125 to @UiO-66 with exposed {1 1 1} facet exhibits an excellent CO production rate (56.4 μmol g −1 h −1 ) and selectivity (99 %) under visible light irradiation without any photosensitizers/sacrificial agents, being 1.4 and 11.3 times higher than individual MIL-125 to and UiO-66, respectively. The type-II heterojunction significantly enhances the separation of photogenerated electrons-holes in physical space. The photogenerated electrons migrate from Zr in UiO-66 to Ti in MIL-125 to , promoting a spatial synergy between CO 2 reduction on MIL-125 to and H 2 O oxidation on UiO-66. Compared with MIL-125rd@UiO-66 with exposed {1 1 0} facet and MIL-125 ds @UiO-66 with exposed {0 0 1} facet, MIL-125 to @UiO-66 with exposed {1 1 1} facet improves the exposure of surface-active Ti sites, thereby enhancing the adsorption/ activation of CO 2 to generate the *COOH intermediate. This work provides an effective strategy for designing MOF-based heterojunction photocatalysts to improve photocatalytic performance.
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
PubMed
高影响因子
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