JOURNAL OF MEMBRANE SCIENCE
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2026
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IF 8.8
Xingyu Chen,Zhihong Liu,Wenyi Zhang,Zhiguo Dong,Shengqiong Fang,Xuewei Li,Hong Liu,Wenyuan Ye,Yinhua Wan,Ping Li,Chenxiao Jiang,Jiuyang Lin
Rare earth tailings leachate, enriched in ammonium sulfate and magnesium sulfate, poses considerable environmental challenges while representing a valuable source of recoverable resources. Herein, a selective electrodialysis (SED) process was developed for the selective separation and recovery of NH 4 + and Mg 2+ from nutrient-rich tailings leachate. The influences of feed concentration, concentrate-to-diluate volume ratio, and current density on ion migration, separation efficiency, permselectivity, and energy consumption were systematically examined. Increasing the current density from 5.5 to 7.5 mA cm −2 promoted NH 4 + transport, resulting in an increase in NH 4 + recovery from 49.1% to 90.2% and NH 4 + /Mg 2+ permselectivity from 59 to 361. To overcome the limitations of single-stage separation, a three-stage ionic sieving configuration was subsequently implemented to enhance monovalent/divalent cation discrimination. The improved process achieved the production of high-purity (NH 4 ) 2 SO 4 and MgSO 4 with purities of 99.8% and 97.9%, respectively. These results demonstrate that coupling selective electrodialysis with multistage ionic sieving effectively intensifies monovalent/divalent cation separation and enables efficient resource recovery from complex industrial effluents. The proposed strategy offers a promising and sustainable solution for rare earth wastewater treatment and salt valorization.
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高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Hao Fan,Yiming Yang,Xueting Yang,Xuefeng He,Jian Sun,Liu Yang,Jiao Li,Zhenxing Shen
Although the surface acidity of CeO2 has been increased by H2SO4 to increase its acid sites, the low-temperature (<250 °C) activity of sulfated CeO2 catalysts still needs to be improved. In this study, a Pt-modified CeO2 catalyst was prepared by impregnation or reduction methods to increase its catalytic activity. The results showed the Pt-modified CeO2 catalyst significantly widened its low-temperature catalytic window. The NO conversion and N2 selectivity of the Pt1.0%/SCe-I sample were both more than 90% at 200–350 °C because of its numerous acid sites, excellent redox ability, and higher Pt2+ content. NH3, NH4+, –NH2, and bridging nitrates and monodentate nitrates on the Pt1.0%/SCe-I catalyst surface acted as the active substances. Among them, coordinated NH3 at the Lewis acid sites reacted first. This study highlights the interactions among metals, sulfates, and carriers and supplies a useful method to improve the low-temperature activity of sulfated CeO2.
研究领域:
催化
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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
THERMOCHIMICA ACTA
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2011
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IF 1.908
Xiaohong Zhao,Xueqiao Xie,Yongsheng Yan
Binodal data of poly(propylene glycol) PPG 400 + salt ((NH 4 ) 2 SO 4 , MgSO 4 , and KCl) + H 2 O systems were determined at T = 298.15 K, and binodal data of PPG 400 + KAc + H 2 O system was determined at T = (298.15, 308.15, and 318.15) K. Moreover, the binodal curves were fitted to Merchuk equation, and the tie-lines were fitted to both the Othmer–Tobias and Bancroft equations. The effects of temperature and salts on the binodals and tie-lines of the investigated ATPSs were also studied. Finally, the salting-out ability of salts on the polymer was obtained by fitting the Setschenow-type equation to the tie-line data to derive a salting-out coefficient ( k S ) for each salt. For potassium salts, the relative effectiveness of the anions in inducing the phase segregation in ATPSs follows the Hofmeister series. The relative salting-out effectiveness of the sulfate salts is influenced by complexation of the cations by PPG.
研究领域:
化学工程
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生物技术
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Hao Xiong,Hanyou Zhang,Baisheng Sa,Ping Li,Lingyan Lin,Aijun Yang,Jiansheng Li,Jinquan Hong,Linqin Jiang,Yu Qiu
All-inorganic halide perovskite nanocrystals (PNCs) have attracted extensive attention due to their potential for the next-generation displays. The ammonium and halide composition affect strongly the photoelectrical properties and the long-term stability of PNCs. In this work, we present a novel class of mixed all-inorganic (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs prepared via cation/anion co-exchange reaction between CsPbBr 3 NCs and the mechanochemically reacted NH 4 Pb n X 2n+1 (X = Cl, Br, I, n = 1 or 2) powders. The cubic morphologies of (Cs,NH 4 )Pb(Br,X) 3 NCs with different halogen element combinations were successfully obtained. In the meanwhile, the extended emission ranges from deep-blue (453 nm) to warm-yellow (564 nm). Higher PLQY and higher stability against ambient air and UV light were achieved simultaneously by controlling the ion co-exchanging process. The photoluminescence quantum yield (PLQY) of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NCs were also significantly enhanced compared with that of pure CsPbBr 3 after ions exchanging (>85% versus 58%). In addition, the stability of (Cs,NH 4 )Pb(Br,X) 3 (X = Cl, Br, I) NC thin films under the UV-irradiation and in the ambient atmosphere were also dramatically improved. The cation/anion co-exchanging synthetic strategy developed in our research provides a new pathway to modulate and realize mixed-ion PNCs with high optoelectronic performance.
研究领域:
材料科学
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光学
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DOI
高影响因子
Nano Research
·
2021
·Vol. 15
·期 3
·2047-2051
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IF 8.897
Ma Yuan,Sun Tianjiang,Nian Qingshun,Zheng Shibing,Ma Tao,Wang Qiaoran,Du Haihui,Tao Zhanliang
Aqueous ammonium-ion battery (AAIB) has attracted much attention due to its low cost, safety, and environmental friendliness, but its electrode materials have many limitations. Here, alloxazine (ALO) is introduced as the anode for the AAIB. With its pseudocapacitive effect and fast diffusion kinetics of NH 4 + , ALO anode shows excellent rate performance with a specific capacity of 120 mAh/g at 40 C (10 A/g). The full battery is further fabricated by ALO anode and Prussian white analogs cathode. Its specific capacity can reach 110 mAh/g and it can work up to 10, 000 cycles with no obvious capacity fading at 20 C (5 A/g). In addition, the system delivers a high energy density of 122.5 Wh/kg and a power density of 5, 055 W/kg. This work broadens the application prospect of the AAIB.
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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DOI
高影响因子
ELECTROCHIMICA ACTA
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2026
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IF 5.8
Xiaoyu Zhao,Shuguang Shen,Jie Wang,Baojia Wang,Yongmei Liu,Jing Li
Using oxygen-rich medium- and low- temperature coal tar pitch enables intrinsic O-doping. • Low-dose (NH 4 ) 2 SO 4 achieves pre-oxidation of the raw materials. • Low-dose KOH activation produces uniform mesopores with 54% carbon yield. • A sequential low-dose strategy achieves synergistic pore-surface control. • MPC-700 achieves a specific capacitance of 367 F g −1 (at 5 A g −1 ). High-performance supercapacitors require electrode materials with suitable pore structures and abundant surface functional groups. Herein, a tandem oxidation-activation strategy is proposed to prepare coal-tar pitch-derived hierarchical porous carbon (MPC-700) rich in quinonyl groups. Low-dose (NH 4 ) 2 SO 4 pre-treatment significantly increases the oxygen content of the precursor, enhances the quinonyl group content in the porous carbon, and improves the pore structure, leading to a higher specific surface area. DFT calculations reveal that quinone-induced carbon vacancies reduce K⁺ adsorption energy, enhancing ion storage kinetics. Benefiting from the synergistic effect of hierarchical pores and quinone groups, MPC-700 achieves a specific capacitance of 367.0 F g −1 in 6 M KOH with excellent cycling stability. This work demonstrates a tandem coupling effect between low-dose modifiers and activators on oxygen-rich coal tar pitch, where pre-oxidation and pre-etching dictate the final pore structure and surface chemistry. This strategy offers a low-cost, green route for preparing porous carbon for energy storage applications. The porous carbon material, characterized by rich defect sites, a abundant quinonyl active functional groups, and a uniform porous structure, delivers outstanding electrochemical performance when employed as a supercapacitor electrode. Download: Download high-res image (437KB) Download: Download full-size image
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Yuanhao Shen,Juan Zou,Haihui Lan,Yiran Ding,Zijia Liang,Zhongzhuo Yang,Ziyue Zeng,Juncai Long,Yuanxin Zhao,Lei Fu,Mengqi Zeng
Aqueous ammonium-ion batteries (AIBs) are considered a promising alternative for large-scale energy storage due to their cost-effectiveness and high safety. Prussian blue analogues (PBAs) are widely regarded as potential cathode materials for AIBs because of their high working potential and stable 3D framework. However, the low capacity of PBAs (≈60 mAh g −1 in the existing reported works) hinders their further development. Herein, the ion insertion is first proposed to double the capacity of PBAs by unlocking the inert-site. Using NH 4 + -rich copper hexacyanoferrate as a representative, trace amounts of induced ion in the electrolyte can change the electronic states of atoms at the inert site to achieve much higher capacity. What's more, the construction of NH 4 + -rich high-entropy Prussian blue (N-HEPBA) further facilitates structural stability. N-HEPBA unlocked by corresponding induced ions can exhibit an impressive specific capacity (129 mAh g −1 at 0.1 A g −1 ), which is the highest and approximately twice that of reported PBAs for aqueous AIBs. Meanwhile, it delivers excellent cycling stability with nearly 100% capacity retention achieved over 1000 cycles at 2 A g −1 . This innovative unlocking method can provide an effective way to obtain high-capacity PBAs in AIBs, thus promoting the development of large-scale energy storage.
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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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Guo-Li Chen,Hui-Ye Jiang,Yan Jiang,Zhao-Peng Deng,Ying-Ming Xu,Li-Hua Huo,Shan Gao
The efficient and synchronous monitoring of diverse harmful gases by one portable sensor has recently become a hot topic due to the vast majority of reports for only sensing a given gas. Herein, two types of hollow microspheres cross-linked through γ-WO 3 nanosheets were controllably prepared by simple pyrolysis of commercial ammonium metatungstate (AMT). Among, the orange product obtained by air calcination at 400 °C is trace (NH 4 ) 0.33 WO 3 doped γ-WO 3 composite, and has broad mesoporous structure, rich oxygen vacancies and the synergistic catalysis of surface W 6+ Lewis acid. These unique factors help to promote the diffusion of gas molecules, expose more active sites for chemical reaction, increase the conductivity of sensitive material and modulate the state of surface adsorbed oxygen species, which in turn effectively improve its sensitive capability toward diverse noxious gases. The (NH 4 ) 0.33 WO 3 /WO 3 sensor achieves response values of 234 for 5 ppm NO 2 at low 50 °C and 170 for 100 ppm diisopropylamine (DIPA) at 170 °C. Meanwhile, it also displays low detection concentrations, good reversibility and moisture resistance, as well as practical detection for vehicle exhaust and prometryn. This is also the first report of a WO 3 -based sensor that can simultaneously achieve dual-detection of trace NO 2 and DIPA. Moreover, the temperature-tuned dual-response mechanism has also been discussed in detail.
研究领域:
材料科学
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环境监测
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传感器技术
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DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Qian Wu,Tianyu Wang,Jingfang Zhou,Pifu Gong,Haochen Li,Haotian Tian,Mingjun Xia
With the increasing significance of the laser industry, especially in the 3–5 μm range, mid-infrared (mid-IR) nonlinear optical (NLO) crystals have become crucial components to meet stringent requirements. Herein, a large birefringence is essential for a mid-IR NLO crystal, as it ensures the phase-matching condition for high-conversion efficiency in laser output operation. In this study, three vanadium selenites A(VO2)3(SeO3)2 (A = NH4+, K+, and H3O+) with hexagonal tungsten oxide-related structures were prepared, featuring two-dimensional layered structures composed of two second-order Jahn–Teller (SOJT) motifs: distorted VO6 octahedra and SeO3 pyramids. Owing to the highly anisotropic VO6 octahedra and SeO3 pyramids, the family of A(VO2)3(SeO3)2 (A = NH4+, K+, and H3O+) crystals shows significant birefringence, which represents the highest birefringence value among vanadium selenites, even surpassing some SOJT-cation-based oxides. In addition, the title crystals exhibit large second harmonic generation responses of powder of 0.28–0.58 × AgGaS2 (AGS) at 2.09 μm.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2026
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IF 2.4
Ya-Li Wang,Rui-Zhi Cui,Hong-Bao Ren,Qiu-Ye Yang,Wu Li
This study addresses the unclear crystallization behavior of rubidium in chlorobromine coexisting brine systems through experimental and simulation approaches. First, the phase equilibrium data of the ternary system RbCl–RbBr–H2O at 298.15 K were determined using the isothermal dissolution equilibrium method, and the corresponding phase diagram was constructed. The solid phase was characterized by XRD and SEM-EDS, and solubility was theoretically calculated and validated using the Pitzer model. To further elucidate the solid-solution formation behavior of rubidium in chlorobromine coexisting brine systems at the microscopic level, molecular dynamics simulations were performed. Combined with the previously reported phase diagrams of MCl–MBr–H2O systems (M = Li+, Na+, K+, NH4+), the radial distribution functions, coordination numbers, and mean square displacements of different systems were systematically analyzed to examine the differences in ionic hydration structures and migration behavior. From macroscopic phase equilibria to microscopic ion dynamics, this study systematically clarifies the common patterns of formation of continuous solid solutions in chlorobromine coexisting brine systems.
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高影响因子
BIORESOURCE TECHNOLOGY
·
2021
·
IF 9.642
Yu Li,Jing Wang,Bingyan Li,Mengdan Geng,Yan Wang,Jianguo Zhao,Baodan Jin,Yanfei Li
The extracellular polymeric substances (EPS) and microbial community structures were investigated in wastewater treatment containing copper oxide nanoparticles (CuO NPs) (reactor R1) and CuO NPs and humic acid (HA) (reactor R2) using both sequencing batch bioreactors (SBRs), and their response on resistance genes expression was analyzed. The removal of influent chemical oxygen demands (COD) and NH 4 + -N was moderately influenced under CuO NPs (5 mg/L) stress, while the function of HA (10 mg/L) was not reflected. However, the EPS production and microbial community were affected by the HA addition. The expression of different antibiotic resistance genes (ARGs), metal-resistance genes (MRGs), and int I1 was related to the primary compositions of polysaccharides and proteins in EPS and different microbial communities at the genus level. Furthermore, the expression of resistance genes was not stimulated under CuO NPs stress, and supplying HA was suggested to reduce their expression in wastewater treatment.
研究领域:
环境科学
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微生物学
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废水处理
·
纳米技术
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Huiqin Gao,Li Li,Xingzhong Huang,Zeyu Kang,Minlin Mao,Zhang Lin,Liyuan Chai,Weizhen Liu
Secondary aluminum dross (SAD), a major solid waste in the aluminum industry, possesses a complex composition representing both a valuable resource and a significant environmental challenge. Approximately 30%–40% of its aluminum content consists of inert species (α-Al 2 O 3 and MgAl 2 O 4 ). In this study, a method for the comprehensive extraction of Al from SAD was developed, which achieved 96% extraction efficiency. The process involved a two-step roasting sequence (first with (NH 4 ) 2 SO 4 at 350°C, then with Na 2 CO 3 at 800°C) and subsequent aqueous leaching. Key parameters, including additive dosage, roasting conditions, and leaching variables, were systematically investigated to optimize aluminum recovery. Mechanistic analysis revealed that (NH 4 ) 2 SO 4 destabilizes the Mg–Al bonds within the MgAl 2 O 4 structure, converting Al into the labile Al 2 (SO 4 ) 3 form. Subsequently, Na 2 CO 3 promotes the structural degradation of α-Al 2 O 3 . Consequently, most inert aluminum species in SAD are converted into soluble aluminum salts. This work provides a targeted activation strategy to overcome technical barriers in extracting inert aluminum, thus establishing a feasible route for total Al recovery from SAD.
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高影响因子
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