Heliyon
·
2023
·Vol. 10
·期 1
·e23371
·
IF 4
Mingming Zheng,Yinghao Li,Menghua Cao,Yuxin Guo,Guohong Qiu,Shuxin Tu,Shuanglian Xiong,Dun Fang
In the present study, we demonstrated that the presence of cysteine could remarkably enhance the degradation of atrazine by Fe 3 O 4 /persulfate system. The results of electron paramagnetic resonance (EPR) spectra confirmed the combination of cysteine and Fe 3 O 4 exhibited much higher activity on activation of persulfate to generate more SO 4 •- and •OH than Fe 3 O 4 alone. At pH of 3.0, SO 4 •- and •OH contributed to about 58.2 % and 41.8 % of atrazine removal respectively, while •OH gradually dominated the oxidation of atrazine from neutral condition to alkaline condition. The co-existing Cl - and HCO 3 - could quench SO 4 •- , resulting in the inhibition of atrazine degradation. The presence of low natural organic matters (NOM) concentration (0-2 mg L -1 ) could enhance the atrazine removal, and high concentration (>5 mg L -1 ) of NOM restrained the atrazine degradation. During the Cysteine/Fe 3 O 4 /Persulfate process, cysteine served as a complexing reagent and reductant. Through acidolysis and complexation, Fe 3 O 4 could release dissolved and surface bound Fe 2+ , both of which contributed to the activation of persulfate together. Meanwhile, cysteine was not rapidly consumed due to a regeneration process, which was beneficial for maintaining Fe 2+ /Fe 3+ cycle and constantly accelerating the activation of persulfate for atrazine degradation. The reused Fe 3 O 4 and cysteine in the Cysteine/Fe 3 O 4 /Persulfate process exhibited high stability for the atrazine degradation after three cycles. The degradation pathway of atrazine included alkylic-oxidation, dealkylation, dechlorination-hydroxylation processes. The present study indicates the novel Cysteine/Fe 3 O 4 /Persulfate process might be a high potential for treatment of organic polluted water.
研究领域:
环境科学
·
化学工程
·
水处理
·
污染物降解
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2016
·
IF 5.31
Jingchun Yan,Weiguo Gao,Mingang Dong,Lu Han,Linbo Qian,C. Paul Nathanail,Mengfang Chen
A reduced graphene oxide (rGO) supported magnetite nanoparticle (nFe 3 O 4 ) composite (nFe 3 O 4 /rGO) was synthesized and shown for the first time to be an efficient persulfate activator to generate SO 4 − for trichloroethylene (TCE) degradation. The degradation efficiency of TCE (0.15 mmol L −1 ) was 98.6% within 5 min in the presence of 6.94 g L −1 nFe 3 O 4 /rGO with an optimum mass ratio of 1:4 and persulfate concentration of 3.0 mmol L −1 . By dispersing nFe 3 O 4 on the rGO surface, nanoparticle agglomeration was prevented and the aggregation of the rGO sheets was disrupted. Both the redox effect coupled in nFe 3 O 4 and the electron transfer by functional groups containing oxygen on the surface of rGO enhanced the SO 4 − generation. Given the identified free radical species and the characterization of the nFe 3 O 4 /rGO, a persulfate activation mechanism by nFe 3 O 4 /rGO for the degradation of TCE was interpreted.
研究领域:
环境科学
·
化学工程
·
材料科学
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DOI
高影响因子
Journal of Materials Chemistry A
·
2025
·Vol. 13
·期 35
·29450-29460
·
IF 9.5
Yushen Qian,Mengxue Wu,Anyu Hu,Honghao Deng,Nawal K. Almaymoni,Abdullah N. Alodhayb,Jie Li,Jiahong Pan,Ping Chen,Zhicong Shi
Sodium iron sulfate (Na2+2xFe2−x(SO4)3, NFS) is a promising cathode material for sodium-ion batteries (SIBs) for large-scale energy storage systems due to its low cost and long life. However, NFS is an insulator and cannot reversibly store sodium ions to a large extent. To address this problem, an NFS material integrated with carbon nanotubes (CNTs) is developed in this work. The incorporation of CNTs effectively converts NFS from an insulator to a semiconductor, thereby significantly enhancing the electrochemical performance. The NFS@CNTs material incorporates an alluaudite-type framework that improves electronic conductivity, thereby enhancing rate capability and cycling life. By introducing 10 wt% CNTs, the NFS@CNTs composite achieves a high working voltage of 3.8 V (vs. Na/Na+) and an impressive high-rate specific capacity of 80 mA h g−1 at a rate of 20C. Furthermore, it can retain 81.4% of the initial specific capacity after 20 000 cycles at a rate of 50C, demonstrating an outstanding cycling stability. This work not only provides an in-depth understanding of the potential of NES to be used as a high-rate, long-lasting cathode material for SIBs but also lays the foundation for SIBs in large-scale energy storage applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米科技
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产品关联
DOI
高影响因子
Nano Energy
·
2024
·
IF 16.8
Changyu Liu,Kean Chen,Fumin Li,Along Zhao,Zhongxue Chen,Yongjin Fang,Yuliang Cao
Polyanion-type Fe-based sulfates are one of the most promising cathode candidates for sodium-ion batteries (SIBs) due to the low cost and high voltage. However, their practical application is still hindered by the poor air stability. Herein, we report a novel anion-doped Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 cathode material with higher air stability and faster ion/electron transport kinetics compared to pristine Na 2.6 Fe 1.7 (SO 4 ) 3 cathode as evidenced by first-principles calculations. The obtained Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 not only manifests a high discharge capacity of 100.4 mAh g −1 with an operating voltage of ∼3.57 V (Na + /Na), but also exhibits excellent rate performance (∼86.7 mAh g −1 at 30 C) and cycle stability over 6000 cycles (capacity retention of 76.3%). Particularly, Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 cathode still maintain its original crystal structural and sodium-storage property after exposure to air for one week. The high-voltage, long-life, and air-stable Na 2.9 Fe 1.7 (SO 4 ) 2.7 (PO 4 ) 0.3 could be a competitive cathode candidate for low-cost sodium-ion batteries.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2014
·
IF 4.058
Liang Xiao,Ya Xiong,Shuanghong Tian,Chun He,Qingxian Su,Zhanhao Wen
A coordination supramolecular polymer, [Cu(bipy)(SO 4 )] n , was prepared as an adsorbent. It has a molecular structure of one-dimensional chain with dense adsorption sites. Three divalent dyes including Congo red, Orange G and Reactive Brilliant red X-3B were tested as pollutants in the adsorption study. The adsorbent showed extraordinary adsorption capacity for all three dyes, reaching 2429 mg/g, 915 mg/g and 1333 mg/g for Congo red, Reactive Brilliant red X-3B and Orange G, respectively. The Langmuir isotherm model can well describe the adsorption isotherm. In kinetic study, all of the three dyes presented a model of pseudo second-order. According to the kinetic rate constants, the adsorption processes are very fast and different for three dyes. The difference can be attributed to the divalent character and the different structure of the dye’s molecule. Based on their discrepancy of adsorption velocity, separation of dyes was attempted through kinetic separation between Congo red and X-3B. A separation coefficient was developed, which can well describe the separation performance results. The results show that the two dyes can be separated quickly and efficiently by [Cu(bipy)(SO 4 )] n .
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2026
·
IF 3.3
Jingsha Xu,Xiaofeng Zhang,Shanshan Chen,Weiyi Wang,Wenbo Qiu,Weizhao Cai,Liujiang Zhou
Nonlinear optical (NLO) crystals serve as indispensable components in laser technology. Many modifications of sulfate-based NLO materials rely on introducing a single type of functional cation, which in some cases leads to an imbalanced improvement in either NLO response or birefringence. To enable simultaneous improvement of these key properties, we designed and synthesized a novel sulfate compound, Nb2O2(TeO3)2(SO4), using a double second-order Jahn-Teller (SOJT) strategy that introduces both Nb5⁺ (d0 cation) and Te4+ (lone-pair cation) into the sulfate framework. Remarkably, the introduction of distorted [NbO6] octahedra and [TeO3] pyramids enables the material to achieve a remarkable birefringence of 0.197 at 546 nm and a second-harmonic generation (SHG) response of 0.82 times that of KH2PO4 (KDP). Furthermore, the compound exhibits high thermal stability (> 600 °C), maintains chemical stability in both water and concentrated sulfuric acid, and possesses an ultraviolet (UV) cutoff edge at 305 nm. Theoretical analyses confirm that the synergy between the [NbO6] octahedra and [TeO3] pyramids is the key mechanism for the enhanced SHG response and birefringence. This work demonstrates the potential of Nb2O2(TeO3)2(SO4) as an UV-NLO material and validates the effectiveness of the multi-component synergistic strategy in designing advanced NLO crystals.
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DOI
高影响因子
CELLULOSE
·
2022
·Vol. 29
·期 4
·2257-2272
·
IF 6.123
Shi Ning,Zhu Yuju,Qin Bangzhi,Liu Ying,Zhang Hongyan,Huang Hongsheng,Liu Yunhua
A simple and efficient biphasic system comprising H 2 O, tetrahydrofuran (THF), cyclohexane (CHX) and Al 2 (SO 4 ) 3 was employed to convert cellulose into 5-hydroxymethylfurfural (HMF). The volume ratio of the organic phase to the aqueous phase (V org /V aque ), concentration of Al 2 (SO 4 ) 3 in the aqueous phase (C[Al 2 (SO 4 ) 3 ] aque ) and concentration of Al 2 (SO 4 ) 3 in the organic phase (C[Al 2 (SO 4 ) 3 ] org ) of the biphasic system played critical roles in the conversion of cellulose into HMF. In the biphasic systems with H 2 O/THF/Al 2 (SO 4 ) 3 of 4/18/0.4 and H 2 O/THF/CHX/Al 2 (SO 4 ) 3 of 3/16/3/0.4, > 80% of the added H 2 O was dissolved in the organic phase, whereas most of the added Al 2 (SO 4 ) 3 remained in the aqueous phase under the reaction temperature, jointly leading to high V org /V aque , high C[Al 2 (SO 4 ) 3 ] aque and low C[Al 2 (SO 4 ) 3 ] org in the biphasic system. All of these results yield the excellent performance of these biphasic systems in the conversion of cellulose into HMF. The addition of CHX into the biphasic system can decrease the solubility of Al 2 (SO 4 ) 3 in the organic phase, thus improving the stability of HMF in the reaction system. The influences of catalyst usage, reaction temperature and time, and cellulose/solvent ratio were all explored, and a high HMF yield of 71.2% was obtained in the H 2 O–THF–CHX biphasic system with an H 2 O/THF/CHX volume ratio of 3/16/3 under optimized conditions. Graphical abstract
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产品关联
DOI
高影响因子
WATER RESEARCH
·
2020
·
IF 9.13
Xiaoyu Yu,Jianliang Sun,Guibiao Li,Yi Huang,Yu Li,Dehua Xia,Feng Jiang
The sulfate radical (•SO 4 − )-based advanced oxidation processes (AOPs) for the degradation of refractory organic pollutants consume a large amount of persulfate activators and often generate toxic organic by-products. In this study, we proposed a novel iron-cycling process integrating •SO 4 − -based AOP mediated by reusable iron particles and a sulfidogenic process to degrade and detoxify Orange II completely. The rusted waste iron particles (Fe 0 @Fe x O y ), which contained Fe II /Fe III oxides (Fe x O y ) on the shell and zero-valent iron (Fe 0 ) in the core, efficiently activated persulfate to produce •SO 4 − and hydroxyl radicals (•OH) to degrade over 95% of Orange II within 120 min. Both •SO 4 − and •OH destructed Orange II through a sequence of electron transfer , electrophilic addition and hydrogen abstraction reactions to generate several organic by-products (e.g., aromatic amines and phenol), which were more toxic than the untreated Orange II. The AOP-generated organic by-products were further mineralized and detoxified in a sulfidogenic bioreactor with sewage treatment together. In a 170-d trial, the organic carbon removal efficiency was up to 90%. The inhibition of the bioreactor effluents on the growth of Chlorella pyrenoidosa became negligible, due to the complete degradation and mineralization of toxic AOP-generated by-products by aromatic-degrading bacteria (e.g., Clostridium and Dechloromonas ) and other bacteria. The sulfidogenic process also well recovered the used Fe 0 @Fe x O y particles through the reduction of surface Fe III back into Fe II by hydrogen sulfide formed and iron-reducing bacteria (e.g., Sulfurospirillum and Paracoccus ). The regenerated Fe 0 @Fe x O y particles had more reactive surface Fe II sites and exhibited much better reactivity in activating persulfate in at least 20 reuse cycles. The findings demonstrate that the integrated process is a promising solution to the remediation of toxic and refractory organic pollutants because it reduces the chemical cost of persulfate activation and also completely detoxifies the toxic by-products.
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PubMed
高影响因子
CELLULOSE
·
2019
·Vol. 27
·期 3
·1451-1463
·
IF 3.917
Zhou Lipeng,Gao Dongting,Yang Jingru,Yang Xiaomei,Su Yunlai,Lu Tianliang
Abstract Conversion of cellulose to chemicals is an economic and environmental route for biomass utilization. In this work, efficient conversion of cellulose to alkyl levulinates and levulinic acid was realized by oxidation pretreatment combined with alcoholysis over Al 2 (SO 4 ) 3 catalyst. Proper pre-oxidation conditions including oxidation temperature and time are important. By pre-oxidation, part of hydroxymethyl groups on cellulose was converted to carboxyl groups which provide the Brønsted acid sites near the glycosidic bonds to improve the depolymerization of cellulose to monosaccharide. Al 2 (SO 4 ) 3 ·18H 2 O can play both Brønsted and Lewis acid roles in methanol and catalyze the conversion of monosaccharide to alkyl levulinates and levulinic acid. After pre-oxidation at optimized conditions, cellulose can be converted into methyl levulinate and levulinic acid over Al 2 (SO 4 ) 3 in methanol efficiently, and total yield of methyl levulinate and levulinic acid can reach 66.8% at 180 °C for 3 h. Furthermore, the simple and cheap Al 2 (SO 4 ) 3 catalyst is recyclable which is important for the practical application. Graphic abstract
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高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Yixin Huang,Jing Zou,Jinbin Lin,Haoyu Yang,Mengyun Wang,Jiawen Li,Wei Cao,Baoling Yuan,Jun Ma
The activation of peroxydisulfate (PDS) by organic compounds has attracted increasing attention. However, some inherent drawbacks including quick activator decomposition and poor anti-interference capacity limited the application of organic compound-activated PDS. It was interestingly found that 2,2′-azino-bis (3-ethylbenzothiazoline-6-sulfonate) (ABTS) could act as both activator and electron shuttle for PDS activation to enhance diclofenac (DCF) degradation over a pH range of 2.0–11.0. Multiple reactive species of ABTS•+, •OH, and SO4•– were generated in the PDS/ABTS system, while only ABTS•+ and •OH directly contributed to DCF degradation. ABTS•+, generated via the reactions of ABTS with PDS, SO4•–, and •OH, was the dominant reactive species of DCF degradation. No significant decomposition of ABTS was observed in the PDS/ABTS system, and ABTS acted as both activator and electron shuttle. Four possible degradation pathways of DCF were proposed, and the toxicity of DCF decreased after treatment with the PDS/ABTS system. The PDS/ABTS system had good anti-interference capacity to common natural water constituents. Additionally, ABTS was encapsulated into cellulose to obtain ABTS@Ce beads, and the PDS/ABTS@Ce system possessed excellent performance on DCF degradation. This study proposes a new perspective to reconsider the mechanism of activating PDS with organic compounds and highlights the considerable contribution of organic radicals on contaminant removal.
研究领域:
环境科学
·
污染控制
·
化学工程
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2017
·Vol. 43
·期 7
·3961-3974
·
IF 1.369
Jiao Yinchun,Zhu Man,Deng Renjie,Jian Jian,Yin Yi,You Kuiyi
With the increase in environmental awareness, developing a highly efficient and environmentally benign nitration process has very important academic and applied industrial values in the synthesis of nitro-compounds. Towards this goal, we have developed an efficient and environmentally friendly approach for solvent-free liquid phase nitration of toluene by employing NO 2 as a nitrating agent and sulfated SO 4
2− /WO 3 as a catalyst replacing traditional nitric acid–sulfuric acid under mild conditions. The results indicate that SO 4
2− /WO 3 as an effective and eco-friendly catalyst exhibits excellent catalytic activity and reusability for the nitration of toluene with NO 2 . In addition, the possible pathway for liquid phase nitration of toluene with NO 2 over sulfated SO 4
2− /WO 3 catalyst was suggested. The present method makes this nitration process safe and environmentally friendly, and has the potential to enable a sustainable production of nitro-compounds from the liquid phase nitration of aromatic hydrocarbon with NO 2 in industrial applications.
研究领域:
催化化学
·
绿色化学
·
有机合成
·
环境友好工艺
·
工业化学
✓ 已验证
DOI
高影响因子
Science Bulletin
·
2023
·
IF 18.9
Along Zhao,Fangjie Ji,Changyu Liu,Shihao Zhang,Kean Chen,Weihua Chen,Xiangming Feng,Faping Zhong,Xinping Ai,Hanxi Yang,Yongjin Fang,Yuliang Cao
Fe-based polyanionic sulfate materials are one of the most promising candidates for large-scale applications in sodium-ion batteries due to their low cost and excellent electrochemical performance. Although great achievements have been gained on a series of Na 6−2 x Fe x (SO 4 ) 3 (NFSO- x , 1.5 ≤ x ≤ 2.0) materials such as Na 2 Fe 2 (SO 4 ) 3 , Na 2 Fe 1.5 (SO 4 ) 3 , and Na 2.4 Fe 1.8 (SO 4 ) 3 for sodium storage, the phase and structure characteristics on these NFSO- x are still controversial, making it difficult to achieve phase-pure materials with optimal electrochemical properties. Herein, six NFSO- x samples with varied x are investigated via both experimental methods and density functional theory calculations to analyze the phase and structure properties. It reveals that a pure phase exists in the 1.6 ≤ x ≤ 1.7 region of the NFSO- x , and part of Na ions tend to occupy Fe sites to form more stable frameworks. The NFSO-1.7 exhibits the best electrochemical performance among the NFSO- x samples, delivering a high discharge capacity (104.5 mAh g −1 at 0.1 C, close to its theoretical capacity of 105 mAh g −1 ), excellent rate performance (81.5 mAh g −1 at 30 C), and remarkable cycle stability over 10,000 cycles with high-capacity retention of 72.4%. We believe that the results are useful to clarify the phase and structure characteristics of polyanionic materials to promote their application for large-scale energy storage.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）