CARBOHYDRATE POLYMERS
·
2016
·
IF 4.219
Qing Chen,Haojie Yu,Li Wang,Zain-ul Abdin,Xinpeng Yang,Junhua Wang,Weidong Zhou,Hongtao Zhang,Xiao Chen
Amylose grafted poly(acrylic acid) (Am- g -PAA) was synthesized by graft copolymerization of amylose with acrylic acid . The structure of Am- g -PAA was confirmed by 1 H NMR and FT-IR spectra. The morphology, crystallinity and thermal properties of amylose and Am- g -PAA were investigated by SEM, XRD and TGA, respectively. The highest degree of substitution (DS) of carboxyl group was 1.96 which was obtained after reacted for 1 h at 60 °C. Acrylic acid to anhydroglucose mole ratio for DS was 19.81. It was found that a large number of carboxyl groups were grafted on the backbone of amylose. It was also found that ammonia adsorption capacity of amylose increased by grafting poly(acrylic acid) on the backbone of amylose.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Shuang Zheng,Qiuxia Xu,Shaojuan Zeng,Guilin Li,Haiyan Jiang,Xueqi Sun,Xiangping Zhang
Ionic liquids (ILs) with low vapor pressure, tunable structures and good NH 3 affinity provide an inspiring way to efficiently capture NH 3 . However, the high viscosity of most ILs limited mass transfer, which incumbers their industrial applications. Besides, how to simultaneously achieve high selectivity, capacity and reversibility of NH 3 still face great challenge. Herein, four novel hydroxyl ammonium protic ILs (HAPILs), including methyldiethanolammonium trifluoromethanesulfonate ([MDEAH][CF 3 SO 3 ]), triethanolammonium trifluoromethanesulfonate ([TEAH][CF 3 SO 3 ]), dimethylethanolammonium trifluoromethanesulfonate ([DMEAH][CF 3 SO 3 ]) and diethylethanolammonium trifluoromethanesulfonate ([DEEAH][CF 3 SO 3 ]), with multiple hydrogen bonding donors that can interact with more over two NH 3 molecules were designed and synthesized, and were further supported onto porous molecular sieves to overcome the above problem. Among the prepared porous HAPIL composites, 50 wt% [TEAH][CF 3 SO 3 ]@MCM-41 showed the highest NH 3 /CO 2 selectivity of 62 under 313 K and 0.1 MPa compared with the state-of-the-art values, along with high capacity of 114.3 mgNH 3 /g-adsorbent. The excellent NH 3 adsorption performance was attributed to the synergistic interaction of mesoporous effect and multiple hydrogen bonding between NH 3 and HAPILs. Furthermore, the porous HAPIL composites exhibited great recyclability after six cycles, revealing great potentials in industrial application of efficient and reversible NH 3 separation.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guo-Wen Fang,Zhang-Min Li,Jian-Fei Li,Dan-Dan Cai,Yu-Jie Xiong,Yan Zhou,Wei Hui,Duan-Jian Tao
Lignin is the largest natural reservoir of aromatic compounds while its intricate polymeric structure complicates the reuse of lignin-derived waste. Herein, we report the development of lignin-based NH 3 adsorbents by upcycling sodium lignosulfonate (SLS) from spent paper pulp liquor. The demethylation of SLS was carried out to obtain the demethylated SLS (DSLS) and subsequently the pelletized DSLS@binder adsorbents were prepared using DSLS and three binders. The results indicate that the optimized 95% DSLS@PVA pellets with binder dosage of 5 wt% PVA (polyvinyl alcohol, PVA) exhibit the NH 3 adsorption capacity of 11.5 mmol g −1 , along with remarkable selectivity uptake for NH 3 /N 2 (3573) and NH 3 /CO 2 (1380). Moreover, the 95% DSLS@PVA pellets demonstrate ultra-fast adsorption kinetics (half-capacity uptake time of merely 38 s). Column breakthrough tests showed that the 95% DSLS@PVA pellets achieved NH 3 retention time of 370 min g −1 in a ternary gas mixture of NH 3 /N 2 /CO 2 (1 %/98 %/1%), with a dynamic adsorption capacity of 2.07 mmol g −1 . In addition, the 95% DSLS@PVA has a good balance between mechanical strength and NH 3 uptake cycle performance. This work provides a sustainable strategy for valorizing lignin waste into high-performance NH 3 adsorbents.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 33
·15959-15966
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IF 3.925
Kai Zong,Ke Li,Ziyue Zhou,Lei Gong,Dongshun Deng
The uptake of NH3 in the industrial tail gas will improve the environmental quality for human health and ecology. Adsorption separation has the advantages of simple operation and low energy consumption. However, the relatively low adsorption capacity severely hinders its practical utilization. In this work, four glycerol-based deep eutectic solvents (DESs) were incorporated into porous silica gels (SGs) and Al2O3 with a large surface area and pore structure to form novel DES/SG and DES/Al2O3 composites. The obtained materials were systematically characterized by FTIR, SEM, BET, and TGA and further evaluated for NH3 adsorption. The results showed that the acidic GuSCN:Gly DES played an indispensable role for the high adsorption ability of the composite. 40 wt% GuSCN : Gly (1 : 3) DES/SG can capture 115.40 mg NH3 per gram adsorbent, which is better than most of the solid adsorption materials reported in the literature and even 30% higher than the original SG. The high adsorption capacity, outstanding thermal stability, and good reusability confirm the success of the present strategy. This study will provide a useful idea for designing DES-supported composites for NH3 separation applications.
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
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 21
·9922-9929
·
IF 9.931
Yang Chen,Bohan Shan,Chengyin Yang,Jiangfeng Yang,Jinping Li,Bin Mu
Two environmentally friendly and efficient synthesis methods, NH3-assisted synthesis and solvent-evaporated conversion, have been developed for the synthesis of a series of M(NA)2 (M = Zn, Co, Cu, Cd; NA = nicotinate) flexible MOFs. The two-dimensional M(NA)2 (M = Zn, Co) and three-dimensional M(NA)2 (M = Cu, Cd) materials exhibit peculiar structural transformation. These frameworks can be obtained from dehydration of M(NA)2(H2O)4 (M = Zn, Co, Cu, Cd) which are zero-dimensional supramolecular structures. Interestingly, the structural transformation of M(NA)2 (M = Zn, Co, Cd) is reversible after liquid water adsorption. Due to the flexible structure of these MOFs, they exhibit abnormal NH3 adsorption properties. The two-dimensional Zn(NA)2 shows a gate-opening behavior for NH3 adsorption. Its layers opened at a pressure of 0.22 bar in the first cycle, resulting in a two-step NH3 uptake with a capacity of 10.2 mmol g−1 at 1 bar. The gate-opening pressure shifted to a lower value with cycles. Co(NA)2 has a huge NH3 uptake of 17.5 mmol g−1, which is top-ranking among the reported values. For the NH3 adsorption over Cu(NA)2 and Cd(NA)2, the adsorption rates increase and adsorption equilibrium is achieved faster after three cycles. Their maximum capacity at 1 bar is 13.4 and 6 mmol g−1, respectively. More importantly, all MOFs can be regenerated under vacuum and heating conditions of 150 °C for 70 min, and they all retained the capacity. The advantages of environmentally friendly synthesis, large adsorption capacity, and regenerable properties indicate that M(NA)2 (M = Zn, Co, Cu) are promising candidates for NH3 adsorption.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2022
·
IF 9.224
Yu Wang,Yunlei Shi,Zhiyong Li,Huiyong Wang,Jikuan Qiu,Xiaopeng Xuan,Jianji Wang
Ammonia (NH3) is a promising clean energy because of its high hydrogen density and carbon-free nature. Therefore, the capture, storage, and desorption of NH3 have received widespread attention in recent years. However, achieving highly efficient capture and release of NH3 remains a challenge. Herein, an efficient strategy is proposed to fabricate defects in a metal–organic framework (UiO-66) by using ionic liquid as a modulator for the first time. It is found that the NH3 adsorption capacity of the optimal defective UiO-66 is up to 1.60 times that of the pristine UiO-66 because of 16.8% of the linker missing. It is noteworthy that the adsorption of NH3 in the defective UiO-66 is completely reversible under conventional pressure-swing conditions, and more than 95% of the NH3 uptake capacity can be maintained after 30 adsorption–desorption cycles. It is revealed that the enhanced coordinating interaction of NH3 to Zr4+ and hydrogen bonding interactions between NH3 and oxygen-containing groups in the framework are the main driving forces for the substantially increased NH3 uptake. In addition, the strategy developed here is green and simple for manufacturing defects, which opens up a new pathway to the preparation of a wide range of solid adsorbents and catalysts.
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
GREEN CHEMISTRY
·
2020
·Vol. 22
·期 20
·7003-7009
·
IF 9.48
Tingting Zhu,Baoyou Pei,Tuo Di,Yunxia Xia,Tiesheng Li,Lei Li
Toxic solvents and catalysts, tedious monomer synthesis, and long reaction time significantly limit the sustainable and large-scale preparation and practical application of microporous polyimides (MPIs). In this work, three kinds of MPIs were successfully prepared through thermal polycondensation in the diphenyl sulfone (DPS) solvent using 1,4,5,8-naphthalenetetracarboxylic dianhydride and triamines as building blocks. The polymerization can be completed in 30 min, and the resultant MPIs exhibit large surface areas up to 1825 m2 g−1. Owing to their abundant microporous structures and plenty of imide rings, MPIs demonstrate excellent ammonia adsorption performance (21.10 wt%, at 303 K and 1.0 bar) and favorable regeneration ability. DPS as a non-volatile solvent can be recovered and recycled three times. In comparison with previous reports, this strategy is more time efficient, environmentally friendly and potentially scalable.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Zimu Liu,Mingtai Li,Zitong Zhao,Yulong Yang,Linlin Deng,Baojuan Dou,Feng Bin
In recent years, the adsorption and separation of ammonia (NH 3 ) from airflow have attracted growing attention. However, there is a need to further enhance the adsorption capacity of adsorbents. In this study, the amino-functionalization of UiO-66 was investigated to evaluate its dynamic NH 3 adsorption performance by varying the type and proportion of organic ligands. It was observed that the introduction of amino groups significantly enhanced the ammonia adsorption capacity by 78.5 %, despite a minor reduction in specific surface area and pore size. Combined with the results of density functional theory and in-situ infrared, the enhanced adsorption ability can be ascribed to the functionalization increasing the polarity within the pore, thereby strengthening interactions with ammonia molecules through weak hydrogen bonding.
研究领域:
环境科学
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材料科学
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化学工程
·
吸附技术
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Chengxin Zhang,Haoran Sun,Yuanpin Yang,Xinglong Sun,Yulian Wang
Ammonia (NH 3 ) inevitably experiences emission and leakage during its production, transition and application. Therefore, the development of effective NH 3 adsorption and storage methods has become an important issue of concern. Porous organic polymers (POPs) with low density and high porosity structure are expected to be used for the capture of NH 3 . In this work, a series of POPs (PP-BM-1, PP-BM-2 and PP-BM-3) were developed by using a cheap petrochemical by-product petroleum pitch (PP) as raw material and three different crosslinking agents through fast and high-efficient ball-milling synthetic strategy (reaction time: 2 h). The resulting polymers exhibited stable skeleton, high BET surface area (580–867 m 2 g −1 ) and abundant micro-pores, which were beneficial for the adsorption of NH 3 . The characterization results of NH 3 adsorption indicated that the adsorption capacities of resulting polymers could up to 14.97 and 12.86 mmol g −1 at 273 K and 298 K, respectively. The POPs also showed good recyclability, with only a slight decrease in NH 3 capacity after 5 adsorption/desorption cycles. Overall, this study could provide a new approach for the design and synthetic strategy of NH 3 adsorption materials, which with a promising prospect for large-scale production and widespread application.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yang Hao,Hao Wang,Rui Han,Caixia Liu,Qingling Liu
Treating wastewater with elevated ammonia nitrogen levels in garbage treatment plants is a global concern, with blow-off recognized as an efficient process for nitrogen removal. However, this method generates low-concentration ammonia, presenting a challenge for adequate recovery. This study addresses this issue by impregnating metal halides onto K 2 CO 3 -activated biogas residue to create composite materials tailored for adsorbing low-concentration ammonia. We systematically investigated the impact of activation parameters, metal halide type, loading capacity, and environmental conditions on the adsorption properties of the materials. Notably, at an activation temperature of 700 °C, utilizing copper chloride with a loading capacity of 30 %, the material exhibited a saturation adsorption capacity of 29.32 mg/g for 200 ppm NH 3 , with a breakthrough time of 45.6 min, significantly surpassing the untreated sample and demonstrated excellent regeneration performance. SEM, BET, and FTIR analyses revealed that the material provided dispersion sites for metal halides, promoted the complexation of metal halides and ammonia and retained pores for ammonia diffusion, thereby enhancing adsorption efficiency. This innovative approach contributes to waste utilization and ensures efficient ammonia recovery through metal halide-ammonia complexation.
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
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jiayin Zhang,Yongde Ma,Wenquan Wu,Zhenping Cai,Yanning Cao,Kuan Huang,Lilong Jiang
Developing an effective method for separation of NH 3 from N 2 , H 2 and CO 2 is highly desired not only for the advancement of Haber-Bosch process, but also for protection of the environment. Here, we report synthesis of carboxylic functionalized mesoporous polymers by copolymerization of divinylbenzene (DVB) and acrylic acid (AA) through a one-pot solvothermal route. The mesoporous structure and acidic site concentration of these polymers can be adjusted by changing the amounts of monomers used. Such polymers display fast, highly efficient and selective adsorption of NH 3 that is better than that of most other solid sorbents in the literature, especially in terms of NH 3 adsorption selectivity against N 2 , H 2 and CO 2 . The adsorption of NH 3 by these polymers is also highly reversible, making them promising solid sorbents for production of high-purity NH 3 .
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Kai Zong,Kejie Jiang,Xiaojun Bao,Dongshun Deng
The capture of ammonia (NH 3 ) from exhaust gases is essential for improving the environmental quality and ecological health. Developing structurally stable adsorbents with excellent performance remains a challenge. In this work, we synthesized three novel sulfonated hyper-crosslinked polymers (sHCPs) with distinct structural characteristics and evaluated their NH 3 adsorption performance. Notably, the preferred sHCP-1 demonstrated remarkable stability and an impressive NH 3 uptake capacity of 11.54 mmol/g at 30℃ and 1.0 bar. Moreover, it can maintain an NH 3 adsorption capacity exceeding 10.0 mmol/g after ten regeneration cycles. The adsorption of NH 3 on the sHCP-1 conformed to the pseudo second kinetic and Weber-Morris diffusion models. Comprehensive thermodynamic and spectroscopic analyses of NH 3 on sHCP-1 were performed to elucidate the adsorption behavior. The adsorption mechanism clarified that the well-developed micro/mesoporous structure provided abundant adsorption sites, where the chemisorption between acidic -SO 3 H groups and basic NH 3 facilitated the formation of NH 4 + from NH 3 . Present work systematically investigated the NH 3 adsorption process of sHCPs, offering valuable insights for the development of efficient and reversible NH 3 adsorbents.
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
危险品化学品经营许可证（带存储）