SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xulong Chen,Wenping Hu
Resource scarcity and environmental degradation pose formidable challenges for the sustainable development of human society. Although enhancing resource utilization efficiency represents a viable solution to these challenges, many strategic resources still suffer from substantial waste and environmental pollution owing to their single utilization form and non-environmentally friendly technologies. In this study, by employing salt lake carnallite as a representative example, we proposed an eco-friendly closed-loop strategy that integrated various chemical processes to maximize resource utilization. This innovation enables successive recycling and utilization of the waste brine generated at each chemical stage, resulting in minimized resource wastage and maximized eco-environmental benefits. Compared with the conventional carnallite utilization method, our strategy enhanced the KCl yield from 55.48% to 89.25%, achieved nearly 100% utilization efficiency of Mg, and improved the Rb recovery efficiency from 0% to 81.28%. Consequently, the overall utilization efficiency of carnallite increased from 20.91% to 87.37%. Additionally, this approach offers the added benefit of significantly improving the overall utilization of mineral resources and substantially reducing the cost of large-scale sample preparation. This work helps to construct a more sustainable and cost-effective utilization system for various mineral and brine resources.
研究领域:
化学工程
·
环境科学
·
矿业工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CLAY SCIENCE
·
2024
·
IF 5.3
Aihua Xiang,Yifan Li,Kun Liu,Xin Wang,Tuanliu Hu
Selenium (Se) is a beneficial plant micronutrient, and the application of Se fertilizers can promote plant growth and enhance the Se content in crops. However, traditional soluble Se fertilizers have low utilization efficiency of Se due to adsorption or leaching. Here, selenite (SeO 3 2− ) -intercalated Mg/Al layered double hydroxide (Se-Mg/Al) for SeO 3 2− slow-release was synthesized by co-precipitation and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). Se-Mg/Al possessed a typical lamellar structure, combining with selenite by electrostatic interaction in interlayer and chemisorption on the surface. The release mechanism of selenite in distilled water from Mg/Al layered double hydroxide (Mg/Al LDH) was Fickian diffusion with gradually released 97.86% after 20 h (Over 90% within 2 h for sodium selenite). At pH range 4.0–8.0, Se-Mg/Al had a stable slow-release ability. And, the sulfate and phosphate anions could effectively trigger the release of selenite through anions exchange. The pot experiments showed that Se-Mg/Al increased Se content of vegetables, more than twice that of directly using sodium selenite. Compared with control treatment, the average stem height and fresh weight per 10 plants with Se-Mg/Al treatment improved approximately 1.48 times and 2.34 times, respectively. This work provides a feasible way for achieving crops selenium supplementation and improving selenium utilization efficiency.
研究领域:
农业科学
·
植物营养学
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产品关联
DOI
高影响因子
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
·
2018
·Vol. 91
·期 6
·998-1007
·
IF 3.526
Zhang Xuezhi,Jia Shaoyi,Song Jia,Wu Songhai,Han Xu
Flocculation using Fe(II) instead of Fe(III) has been considered more efficient in the removal of As. However, excess Fe(II) used in the process always leaves substantial TFe [Fe(II)+Fe(III)] unutilized. We therefore developed three methods [the one-staged process (OS), the one-staged process with H2O2 (OSH) and the two-staged process (TS)] to remove As(III)/As(V) by Fe(II) (Fe:As = 2.0). Our results indicate that pH is an important factor that determines the utilization efficiency of TFe and the removal efficiency of As. In OS, the initial pH was adjusted before the reaction. At the optimal pHs of 10.0 and 11.0, the removal efficiencies of As(V) and TAs [As(III)+As(V)] could reach 84.0% and 66.7%, with only 61.9% and 80.2% TFe being utilized, respectively. In OSH, H2O2 was added after pH adjustment. After OS, pH was re-adjusted to the optimal values before the next 30 min reaction (TS). Compared with OS, the removal efficiencies of As could increase by more than 9% in OSH and TS at the optimal pHs. Besides, there is more than 10% improvement in the utilization efficiencies of TFe except at 12.0. Accelerating oxidation of Fe(II) or re-adjusting pH is therefore highly efficient for a more efficient removal of As from Fe(II)-rich groundwater.
研究领域:
环境科学
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水处理工程
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DOI
高影响因子
MATERIALS LETTERS
·
2021
·
IF 3.423
Fei Chen,Chipeng Jiang,Like Xu,Xiaoyu Li,Qiang Shen
In view of the shortcomings of low utilization rate of disulfide cathode for thermal battery, chloride has been developed as a candidate material for thermal battery cathode. In this case, PbCl 2 was tried to be used as a cathode material for thermal batteries and tested the electrical properties of single battery. The discharge specific capacity can reach 168 mAh/g at 450 °C and 0.5 C current, the voltage plateau reaches 1.8 V, and the active material utilization rate is as high as 87.5% when the cut-off voltage is 0.5 V. The only discharge platform and high utilization rate enable PbCl 2 to be used as the active material for thermal batteries, which also provides a new direction for the chloride cathode active material for thermal batteries.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2021
·Vol. 139
·期 2
·51484
·
IF 3.125
Xin Qi,Yu Guo,Qianlin Chen,Xiaohan Zhao,Xianquan Ao
Slow-release fertilizers (MSRFs) are effective in improving fertilizer utilization and reducing environmental fertilizer pollution. In this study, polyvinyl alcohol (PVA) was modified with kitchen waste oil (KWO) and grafted with urea to prepare a urea MSRF. FTIR, Scanning electron microscopy, X-ray diffraction and water contact angle were used to study the MSRF structure and properties. The effects of the nitrogen content on its properties were also investigated through release performance and degradation behavior evaluation and plant experiments. The results showed that the oil-based polyalcohol-modified PVA (OPMPVA) solution prepared from KWO had good compatibility with the urea-modified compound hydroxylurea, and the prepared MSRF had good hydrophobicity, degradation and slow-release properties. The nutrient release period reached more than 20 days, and the degradation rate after 30 days reached 10.2%. Plant experiments showed that the MSRF prepared in this research has good application potential, and the utilization of nitrogen nutrients was improved.
研究领域:
农业科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE IONICS
·
2024
·
IF 3
Xin Ao,Haonan Chen,Kai Deng,Meifen Wu,Xiangwei Wu,Zhaoyin Wen
The Zebra (Na-NiCl 2 ) batteries are regarded as a promising option for large-scale electrical energy storage due to their plentiful electrode material resources, high energy density, and safety features. In the cathode of Zebra battery, the nickel powders serve as both an active material and a conductive agent. In practice, its amount is significantly greater than its theoretical usage, often exceeding three times the theoretical amount. Hence, the presence of ultra-excessive nickel results in high material costs, posing obstacles to the wider implementation of Zebra batteries. To address this problem, we introduce hollow nickel source as active material to improve the nickel utilization in Zebra battery. In this work, we assemble Zebra batteries using nickel hollow spheres (NHS) with sizes of ∼200 nm, ∼500 nm, ∼1 μm and ∼ 5 μm as nickel source. The battery using NHSs with a size of 1 μm exhibits the best cycling performance and the lowest polarization voltage. By reducing the Ni(NHS, ∼1 μm)/NaCl mass ratio to 1.0, 60% theoretical capacity can be achieved after 170 cycles at 260 °C, which surpasses the traditional batteries using solid nickel source at the same Ni/NaCl ratio. This performance is comparable to that of traditional solid nickel sources with a mass ratio of 1.5 to NaCl. Therefore, using NHS as the nickel source in Zebra batteries reduces nickel usage by 33% without compromising performance.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2024
·
IF 18.9
Lingxiao Ren,Liang Yao,Aoxuan Wang,Xiaobin Li,Zhenglin Hu,Jiayan Luo
Zn(002) has been proven as a dendrite-free anode for Zn batteries. However, stable Zn plating/stripping behavior at an areal capacity exceeding 5 mAh cm −2 has remained unfulfilled so far. In this study, we show that the planar deposit on pure Zn (002) substrate is loosely stacked with high corrosion tendency by the aqueous electrolyte, the key obstacle to achieving considerable efficiency under high-capacity working conditions. To mitigate the side reactions, we introduce an alloying approach by combining monocrystalline Zn(002) with eutectic Al and Cu. The alloying strategy enhances the electrostatic interaction between deposits and substrate, favoring a dense-packed deposition morphology with improved corrosion resistant ability. Solid solution property of Al and Cu in Zn matrix also ensures the structure stability during repeated plating/stripping cycles. As a result, significant extension in cycle life of Zn alloy (002)-based symmetric cells even under 50 mA cm −2 and 25 mAh cm −2 and performance with high utilization also achieves a leading level without extra methods on surface protection. The modified Zn alloy (002) anode induces high anode utilization, paving the way for Zn batteries to meet the requirements of practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2019
·
IF 3.021
Zhitao Han,Tian Lan,Zhiwei Han,Shaolong Yang,Jingming Dong,Deping Sun,Zhijun Yan,Xinxiang Pan,Liguo Song
Experiments were conducted to simultaneously remove NO and SO2 from simulated exhaust gas by cyclic scrubbing and online supplementing pH-buffered NaClO2 solutions in a bench-scale reactor. The effects of key operating parameters on pollutant removal performance had been investigated. The results suggested that an extremely high oxidant utilization rate could be obtained when the oxidant supplementing molar rate approached the oxidant consumption molar rate. Though co-existing SO2 in flue gas would consume a certain amount of the oxidant during the absorption process, the intermediate products of SO32– ions generated from SO2 hydrolysis might be in favor of NO2 absorption to some extent. The introduction of ethanol in scrubbing solution could enhance NOx removal performance largely, which was possibly because of its inhibition effect on SO32– oxidation. The reaction mechanism and reaction products in scrubbing solutions were also discussed roughly through theoretical calculations and ion chromatography analysis.
研究领域:
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mengzhen Song,Jingru Han,Yingzhi Wang,Lungang Chen,YanYan Chen,Xiaoyuan Liao
Fe-based MOFs (Fe-MOFs) are deemed promising Fenton-like catalysts due to their well-developed pores and accessible active sites. However, their inferior catalytic activity, iron leaching, and low H2O2 utilization always hinder their application as Fe-based MOF catalysts. In this work, we manipulated the structure of Fe-oxo nodes in MIL-88B(Fe) via a CuI species substitution method, affording a mixed-valence (Cu-incorporated Fe-MOFs) with highly improved Fenton-like performance. It is found that the CuI serves as a shuttle to promote transfer between FeII/FeIII, inducing the formation of a larger amount of stable FeII sites, which was proven by experimental and DFT calculation results. A linear relationship was observed for the Fenton-like performance and the amount of CuI species for the catalysts. The corresponding value of the •OH formation is 2.17 eV for Cu-incorporated MIL-88B(Fe), which is significantly lower than that of MIL-88B(Fe) (2.69 eV). Meanwhile, the enriched CuI species suppress Fe species leaching during the catalytic reaction. The Fe-ion leakage of 0.4Cu@MIL-88B is very tiny (0.01–0.03 mg/L), significantly less than that of MIL-88B (2.00–3.02 mg/L). At the same time, H2O2 utilization for 0.4Cu@ MIL-88B(Fe) is 88%, which is almost 4.4 times that of pure MIL-88B(Fe). This work provides insights into the rational design of Fe-MOFs as promising Fenton-like catalysts for wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Hong Li,Feng Shao,Xinzhu Wen,Yusen Ding,Chao Zhou,Yafei Zhang,Hao Wei,Nantao Hu
Developing scalable and facile techniques to design and construct unique structures of cathodes with high performance is challenging for the practical Li-S batteries. In this work, highly effective and scalable cathodes based on curved graphene/MXene bi-nanosheets-constituted fibers is demonstrated for long-lifetime Li-S batteries. Wet-spinning is introduced to design and fabricate sulfur cathodes based on graphene/MXene hybrid fibers, in which sulfur is uniformly distributed and intimately enveloped between graphene and MXene nanosheets. The high chemical affinity towards polysulfides enabled by MXene is demonstrated by experiments and density functional theory (DFT) calculations. The assembled cells show high sulfur utilization (the discharge capacity of 1483.1 mAh g −1 at 0.1 C), high rate performance (733.3 mAh g −1 at 2 C) and excellent long cycle stability (0.043% per cycle decay at 1 C over 1000 cycles). Moreover, a reversible areal capacity of 5 mAh cm −2 is achieved under a high sulfur loading of 5.6 mg cm −2 , revealing its great potential for practical applications. This study gives a valuable guidance to design advanced sulfur cathodes for high-performance Li-S batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Journal of Manufacturing Processes
·
2025
·
IF 6.8
Feng Xu,Hang Jin,Zhuomin Zhou,Acan Jiang,Lingling Liu,Haohang Fang,Qiang Gao,Yu-Chuan Su,Zhengmao Ding,Qinnan Chen,Songyue Chen,Daoheng Sun
Digital light processing (DLP) has emerged as one of the most promising methods for constructing intricate 3D hydrogel structures. However, the material availability of hydrogels is quite limited for resin vat-based printing. To overcome this issue, we propose a surface tension confined digital light processing (STC-DLP) technique that utilizes liquid surface tension and surface-treated substrates to confine the hydrogel solution during printing, to minimize the solution consumption. The “top-down” DLP printing enables layer-by-layer curing of hydrogel solutions into controlled 3D structures. A soft and a rigid hydrogel solution was selected as demonstration. By adding hydrogel solution with desired volume, highly accurate microtissue models, flexible sensors, and microfluidic chips with complex 3D structures were fabricated with high solution availability. This approach achieves efficient utilization of hydrogel solutions, and is expected to be especially applicable for printing of scarce or expensive materials.
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-11
·
IF 12.121
Zhang Qizhan,Zhou Minghua,Ren Gengbo,Li Yawei,Li Yanchun,Du Xuedong
Hydrogen peroxide (H 2 O 2 ) synthesis by electrochemical oxygen reduction reaction has attracted great attention as a green substitute for anthraquinone process. However, low oxygen utilization efficiency (<1%) and high energy consumption remain obstacles. Herein we propose a superhydrophobic natural air diffusion electrode (NADE) to greatly improve the oxygen diffusion coefficient at the cathode about 5.7 times as compared to the normal gas diffusion electrode (GDE) system. NADE allows the oxygen to be naturally diffused to the reaction interface, eliminating the need to pump oxygen/air to overcome the resistance of the gas diffusion layer, resulting in fast H 2 O 2 production (101.67 mg h -1 cm -2 ) with a high oxygen utilization efficiency (44.5%–64.9%). Long-term operation stability of NADE and its high current efficiency under high current density indicate great potential to replace normal GDE for H 2 O 2 electrosynthesis and environmental remediation on an industrial scale.
研究领域:
化学工程
·
环境科学
·
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）