CATALYSIS TODAY
·
2025
·
IF 5.3
Yaoyi Hu,Xiqiang Yuan,Zhengquan Zhang,Yu Zhang,Han Ma,Yunfei He,Shaoyun Shan,Tianding Hu
Natural borneol has enormous medicinal value (like clearing heat, detoxifying, relieving pain, and other effects) but has a low yield and high price. Compared with the natural extraction method to obtain borneol, a synthetic method has significant advantages such as high yield, environmental protection, and high economic benefits. In the synthesis method, the catalyst is the most key factor. In this study, two catalysts (SO 4 2- /ZrO 2 -TiO 2 and Al 2 (SO 4 ) 3 /ZrO 2 -TiO 2 ) with high catalytic performance and high positive selectivity were synthesized by impregnation method to synthesize borneol from α-pinene. The optimum synthesis conditions of SO 4 2- /ZrO 2 -TiO 2 were as follows: n(Zr): n(Ti) = 3: 1, sulfuric acid concentration 2 mol/L, calcination temperature 550 °C, the yield of borneol was 68.14 %. Based on the preparation of catalyst SO 4 2- /ZrO 2 -TiO 2 , the optimum synthesis conditions of Al 2 (SO 4 ) 3 /ZrO 2 -TiO 2 were as follows: the concentration of aluminum sulfate was 0.4 mol/L, the calcination temperature was 600 °C, and the yield of borneol was 74.58%, Compared with the highest yield of 59.89% reported in the existing literature, the performance is improved by 13.96%. In addition, the mechanism of the esterification and saponification reaction of borneol has been in the blank stage. We used the density functional theory (DFT) to explore the reaction mechanism.
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高影响因子
Energy Storage Materials
·
2026
·
IF 19.3
Xizhao Wang,Xingshuang Wu,Fenghua Zheng,Lang Zhao,Hongbo Chen,Min Tang,Xinyou He,Wei Xu,Xiangdong Zhu,Zhiming Xiao,Xinghui Liang,Lei Ming,Xing Ou
Alluaudite-type Na 2+2x Fe 2−x (SO 4 ) 3 is considered as a promising cathode for large-scale energy storage due to its high structural stability and cost-effectiveness. However, due to low theoretical specific capacity, NFS still exhibits insufficient overall cost competitiveness, and it also suffers from low intrinsic electrical conductivity. Here, we propose a direct regeneration strategy based on industrial byproducts to prepare a low-cost and high-conductivity Na 2.56 Fe 1.65 Mg 0.05 Mn 0.014 Al 0.006 (SO 4 ) 3 cathode. Compared to traditional synthetic routes for pure compounds, the direct degeneration of industrial byproducts can reduce iron source costs by approximately 83%. In addition, Mg, Mn and Al impurities from industrial byproducts are in situ doped into the polyionic framework, achieving functionalized utilization. Mg/Mn/Al co-doping not only induces strong interactions with oxygen to stabilize the crystal structure, but also decreases Na + migration energy barriers and enhances the electrical conductivity. Na 2.56 Fe 1.65 Mg 0.05 Mn 0.014 Al 0.006 (SO 4 ) 3 exhibits low lattice strain and uniform ion concentration distribution during electrochemical processes, demonstrating excellent rate capability and cycling stability. It shows 100% capacity retention after 1500 cycles at 3 C, and delivers a high discharge capacity of 50.16 mAh g −1 at 30 C. This study provides a scalable route for the valorization of industrial waste and the development of low-cost, high-performance polyanionic cathodes for sodium-ion batteries.
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高影响因子
PHYSICAL REVIEW B
·
2025
·Vol. 111
·期 13
·134401
·
IF 3.7
M. Y. Cui,Z. Y. Zhao,Z. Y. Wu,J. F. Wang,Z. Z. He
Chemical substitution is an effective route to manipulate the magnetic exchange couplings and modify the magnetic properties. However, replacement between ${\mathrm{Cd}}^{2+}$ and ${\mathrm{Hg}}^{2+}$ cations, both belonging to IIB group in the periodic table but having quite close ionic radii, is rarely studied. In this work, the chemical-pressure effect in $A{\mathrm{Co}}_{2}({\mathrm{Te}}_{3}{\mathrm{O}}_{8})({\mathrm{SO}}_{4})\phantom{\rule{4pt}{0ex}}(A=\mathrm{Hg},\mathrm{Cd})$ is reported, which is an $S=1/2$ structural screw-chain antiferromagnetic series with two unique Co positions. Magnetic susceptibility, specific heat, and high-field magnetization measurements on both polycrystal samples suggest that Hg compound experiences two successive antiferromagnetic transitions at ${T}_{\mathrm{N}1}=25.5\phantom{\rule{4pt}{0ex}}\mathrm{K}$ and ${T}_{\mathrm{N}2}=21.5\phantom{\rule{4pt}{0ex}}\mathrm{K}$ in zero field, and multiple field-induced transitions at ${B}_{1}=10.5\phantom{\rule{4pt}{0ex}}\mathrm{T}, {B}_{2}=13\phantom{\rule{4pt}{0ex}}\mathrm{T}$, and ${B}_{3}=19.5\phantom{\rule{4pt}{0ex}}\mathrm{T}$ at 1.6 K. By contrast, a single magnetic transition takes place at ${T}_{\mathrm{N}}=20$ K and ${B}_{\mathrm{c}}=10.7\phantom{\rule{4pt}{0ex}}\mathrm{T}$ in Cd compound. Different twists of ${\mathrm{CoO}}_{6}$ octahedra are discussed to be responsible for the distinct magnetic behaviors. To further understand the influence of the chemical pressure, additional anisotropic characterizations are performed on Hg single crystal and subsequently the magnetic field $\mathrm{versus}$ temperature phase diagrams are established. Large magnetic anisotropy is observed with the moments lying within the $bc$ plane. Besides, a possible field-induced order-disorder transition is uncovered under the application of a magnetic field along the $b$ axis. The opposite features of the anisotropic magnetic susceptibility in Hg compound might demonstrate separate antiferromagnetic orders of the two Co sublattices, the discrepancy of which is reduced due to the weakened twist of ${\mathrm{CoO}}_{6}$ octahedra in Cd compound, leading to a simultaneous occurrence of these transitions instead.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122309
·
IF 7.5
Hongjiang Peng,Yanyu Song,Cong Lu,Gongjie Hua,Jinhong Wu,Kuangfei Lin
Advanced oxidation processes based on peroxymonosulfate (PMS) activation show promising application prospects in the field of water treatment, yet the efficient utilization of reactive oxygen species (ROS) in different spatial regions (bulk solution and catalyst surface) remains challenging. In this work, a catalyst consisting of trace cobalt ion-complexed hydroxyapatite (Co-HAP) was prepared, which exhibits excellent spatial synergistic oxidation effects. Bulk SO 4 •− and in-situ generated surface •OH ensure the efficient removal of levofloxacin (LEV) (74.5% within 20 min). Quenching experiments reveal the surface-mediated ROS evolution pathway, where bulk SO 4 •− reacts with the abundant lattice hydroxyl groups (-OH) on the HAP surface to in-situ generate surface-bound hydroxyl radicals (•OH surf ). Bulk SO 4 •− originates from the activation of PMS by Co ions. Electrochemical characterization and charge density difference simulation confirm that PMS receives electrons from the catalyst, thus inducing the breakage of O-O bonds to generate SO 4 •− . Therefore, bulk SO 4 •− is responsible for attacking dissolved pollutants, while LEV adsorbed on the catalyst surface is "precisely targeted" by surface-confined •OH. This "two-pronged" synergistic strategy significantly reduces mass transfer resistance and achieves efficient utilization of ROS, thereby the degradation rate ( k obs value) of LEV by Co-HAP is 4.6 times that by Co ions alone. Moreover, the Co-HAP system exhibits excellent stability and promising anti-interference ability. This study provides new insights into the positive role of carrier surface functional groups in regulating ROS distribution and evolution in heterogeneous catalysis.
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高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Xiaojun Guo,Yanan Xu,Fei Zha,Xiaohua Tang,Haifeng Tian
Hematite (α-Fe 2 O 3 ), as one of Fenton reagents, is widely investigated for the treatment of wastewater in the field of advanced oxidation processes (AOPs). Considering the fast charge carrier recombination of hematite (α-Fe 2 O 3 ), we have successfully synthesized a novel and high active heterogeneous Fenton catalyst α-Fe 2 O 3 /Cu 2 O(SO 4 ) for the degradation of organic pollutants. The results show that the as-obtained Cu 2 O(SO 4 )-Fe9 composite exhibits excellent degradation properties of Orange II. 98.9% degradation rate was achieved for 100 mL of 50 mg/L Orange II solution in the condition of 0.3 g/L Cu 2 O(SO 4 )-Fe9 catalyst, 3 mM H 2 O 2 and pH = 3.5. The degradation rate constants of Cu 2 O(SO 4 )-Fe9 in the photo-Fenton-like system are 9.33 and 4.07 times of Cu 2 O(SO 4 ) and α-Fe 2 O 3 , respectively. In addition, the mechanism and pathway for the degradation of Orange II were proposed. The scheme of combining copper-based oxysulfate Cu 2 O(SO 4 ) with hematite (α-Fe 2 O 3 ) could improve the efficiency of charge carrier separation, which will further enhance the catalytic activity and expand its application in water purification.
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Sheying Dong,Qian Zheng,Guiqi Huang,Xiaohong Wang,Tinglin Huang
A new method based on coordination polymer [Cu(bipy)(SO4)]n (CP) and functionalized CP, which have a low cost and a easy preparation for selective removal of two organic pollutants in aqueous solution was proposed. Experimental results indicated that CP had excellent adsorption capacity for Alizarin red S (ARS) (1051 mg g–1) and Acid orange 7 (AO7) (989 mg g–1) by ion-exchange interaction. It was found that the kinetic and equilibrium adsorptions were well-modeled using the pseudo-second-order kinetic and the Langmuir isotherm model, respectively. Furthermore, the anionic surfactant (sodium dodecyl sulfonate, SDS) was introduced into the chain structure of CP by anionic exchange to form functionalized CP material (CP/SDS) to remove another type of organic pollution which was representative fluoroquinolone antibiotics like Enrofloxacin (EF), Sparfloxacin (SF), and Levofloxacin lactate (LL) from aqueous solution. Several conditions affecting the removal efficiency of three antibiotics including the composition ratio of SDS in adsorbent, pH, adsorbent dosage, and ionic strength were investigated. Due to the hydrophobic effect of the long methylene chain units in SDS molecular and cyclopropyl, phenyl and alkyl groups in antibiotics, the CP/SDS adsorbent have remarkable adsorption capacity for three antibiotics compared to some commercially available adsorbents, and it requires only 10 min to reach adsorption equilibrium. Thus, the results of this work demonstrate that CP and functionalized CP as the promising adsorbent materials can selectively remove two types of organic pollutants from aqueous solution. In the meantime, it exhibits the alternative exploitation approach for one-dimensional CP in environmental applicability.
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高影响因子
Journal of Cleaner Production
·
2019
·
IF 6.395
Taotao Qiang,Qi Zhang,Liang Chen
Down fibers is the most popular filling material and widely applied in daily life products such as homes, apparel and sporting gear due to its features of being natural, soft and warm keeping. The fluffiness is quite important to reflect the excellent performance of down fibers. However, owing to the short feeding cycle of poultry, the high content of immature down fibers leads to low fluffiness, which affects the quality of down fibers. In our work, the down fibers with amount of maximum raw materials and the fluffiness of 450 cm 3 /30 g were taken as the research samples. Clean and efficient alkaline zirconium sulfate was used as fluffing agent of down fibers. The cost of using alkalized zirconium sulfate treatment is relatively cheap compared with the traditional fluffing agent glutaraldehyde. Different doses of alkalized zirconium sulfate were used to cross-link the natural down fibers to improve the fluffiness. The results showed that when the dosage of alkalized zirconium sulfate was 2% of the weight of fibers, the performance of down fibers were the best and the fluffiness increased by 25%. It has a good practical significance to improve the economic benefits of down manufacturers. Meanwhile, the down fibers treated with alkalized zirconium sulfate were characterized by Energy dispersive spectrometer (EDS), X-ray diffractometer (XRD), Differential scanning calorimetry (DSC) and the changes of free amino content. Furthermore, measurement of zirconium ion concentration in wastewater by ICP showed that alkaline zirconium sulfate has achieved high absorption efficiency. Moreover, ultra depth microscope observation showed that the down fibers treated with alkalized zirconium sulfate have a better dyeing performance compared to untreated fibers. Overall, this work contributed a new insight into the sustainable development of down industry, and it further confirmed that it is a good approach to use the alkalized zirconium sulfate as the fluffing agent to improve the performance of down fibers.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiaohua Jing,Jianying Huang,Jiani Shi,Zihan Zhao,Jingbo Hao,Xiaoning Tang
In this study, five novel ionic liquids (ILs), namely [N888][Cyanex 272], [N888][P507], [N888][Cl], [N888][NO3], and [N888]2[SO4], were synthesized through an organic acid–base reaction, followed by separation using rotary evaporation. Their structures were confirmed by 1H and 13C NMR spectroscopy, showing full consistency with theoretical predictions and no impurity peaks. Under identical extraction conditions, the ILs exhibited the following separation efficiency order for Co2+ from Ni2+: [N888]2[SO4]>[N888][Cl] > [N888][P507] > [N888][Cyanex 272]>[N888] [NO3]. Density functional theory (DFT) calculations revealed that these differences in separation performance arose from variations in the ionic radii of the IL anions. With a simple single-stage extraction under optimized conditions, [N888]2[SO4] enabled near-complete separation of Co2+ from Ni2+, achieving an extraction efficiency of 99.5 ± 2.14% and a separation factor approaching + ∞. Thermodynamic analysis confirmed that the extraction process was endothermic and nonspontaneous. The Co2+ -loaded IL-based extraction phase was efficiently stripped using diluted sulfuric acid, with a stripping efficiency of 99.3 ± 0.57%. Using sodium hydroxide as a precipitant, the solid powder of Co(OH)2 was obtained from the Co2+-containing aqueous phase. Co(OH)2 was characterized qualitatively and quantitatively by XRD and ICP-OES, and its morphology was also analyzed using SEM. The recycled IL-based extraction phase, after activation with dilute sulfuric acid, was analyzed via FT-IR spectroscopy. This regenerated IL-based extraction phase was reused for the separation of Co2+ from Ni2+, showing no degradation in performance after three cycles. Based on these findings, a process flowchart was designed for the efficient preparation of Co(OH)2 from minerals or secondary resources using the [N888]2[SO4]-based extraction phase.
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高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Qi Wang,Shaoxin Song,Ning Nie,Jinshan Tan,Wei Wang
The accurate and sensitive detection of hydrogen peroxide (H 2 O 2 ) is of practical significance in the fields of bioanalysis, medicine, environmental protection as well as food industry. Herein, we design and fabricate NaTb(SO 4 ) 2 nanoparticles (NPs) as novel fluorescent nanoprobes for H 2 O 2 detection. The design strategy is based on the fluorescence quenching occurred during the oxidation of Tb(III) to Tb(IV) upon H 2 O 2 addition. The sensing of NaTb(SO 4 ) 2 NPs to H 2 O 2 is in a “turn-off” mode, and the sensitivity is tunable by the pH due to the pH-dependence of the oxidizing ability of H 2 O 2 . Superior to most of the reported H 2 O 2 sensors, NaTb(SO 4 ) 2 NPs exhibit reliable stability in acidic environment and a more sensitive response to H 2 O 2 with a limit of detection (LOD) down to 0.047 μM at pH = 3.2. Based on its high sensitivity and reliable stability, the NaTb(SO 4 ) 2 NPs is anticipated to find potential applications in the field of biosensors.
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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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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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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
危险品化学品经营许可证（带存储）