International Journal of Environmental Science and Technology
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2026
·Vol. 23
·期 3
·209
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IF 3.4
Omar S.,Omar M.,El-Subruiti G. M.,Attia N. F.,Eltaweil A.
This study presents a novel MgSn(OH) 6 /4CuS@HC photocatalyst developed via hydrothermal treatment followed by chemical precipitation. MgSn(OH) 6 /4CuS@HC was applied for wastewater treatment, targeting eight pollutants: Tetracycline, Doxycycline, Ofloxacin, 3-Nitroaniline, 2-Nitrophenol, Methyl red, Congo red, and Methylene blue. The novel photocatalyst was studied using FTIR, EDX, DRS, SEM, and PL techniques. To gain further insight into the reaction mechanism, scavenger experiments were conducted in addition to operational parameters such as pH, dosage, CuS loading on MgSn(OH) 6 @HC, pollutant initial concentration, selectivity, reusability, water source, and kinetic studies. The performance test highlighted the outstanding photocatalytic activity of templated MgSn(OH) 6 /4CuS@HC, exhibiting remarkable stability over five cycles. This performance is attributed to the direct Z-scheme mechanism and the hydrochar template, which improve charge separation, extend photocharge lifetime, and reduce the agglomeration of nanosemiconductors, thereby enhancing overall stability. This study offers a new perspective on green photocatalysts for diverse environmental applications.
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ELECTROCHIMICA ACTA
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2026
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IF 5.8
Xiaojun Tang,Wenhao Lv,Song Lv
Customized Co(OH) 2 interface layer designed by electrodeposition. • The NF@[Co] 120 /Mn/[Co] 60 composite electrode integrates "conduction-adhesion-protection" functions. • Achieves high volumetric capacitance and excellent cycling stability. • Provide a novel design strategy for next-generation flexible and wearable energy storage devices. The in-situ synthesized nickel foam(NF)/manganese dioxide(MnO 2 ) electrode shows great promise for flexible supercapacitors owing to its high theoretical capacity, abundance, and eco-friendliness. However, the practical application of MnO 2 is hindered by poor conductivity, significant volume expansion, dissolution in electrolytes, and weak adhesion to smooth NF. To address these challenges, this work leverages the advantages of high conductivity and interface modification offered by Co(OH) 2 to precisely construct a sandwich-structured composite electrode(NF@[Co] 120 /Mn/[Co] 60 ) at the MnO 2 interface layer, which integrates conductive, adhesive, and protective functions. Benefiting from the advanced structure, the composite electrode exhibits outstanding electrochemical performance. NF@[Co] 120 /Mn/[Co] 60 achieves a capacitance of 340.31 F g −1 at 1 mA cm −2 , with a capacitance retention of 196.05 F g −1 when the current density increases to 20 mA cm −2 , and a capacity retention rate of 86.68% after 9000 cycles. Moreover, by utilizing the smooth and continuous macroscopic interface of the outermost Co(OH) 2 nanosheets, we integrated it with hydrogel electrolyte to assemble flexible supercapacitor (NF@[Co] 120 /Mn/[Co] 60 //PAA//AC). This device delivers an energy density of 74.95 Wh kg –1 at a power density of 994.94 W kg –1 and demonstrates excellent mechanical flexibility. This novel structural design provides a new electrode system strategy for the development of flexible wearable energy storage systems. Download: Download high-res image (197KB) Download: Download full-size image
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ADVANCED FUNCTIONAL MATERIALS
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2026
·
IF 19.9
Runxian Zhu,Dalang Chen,Zetong Chen,Jianglin Liu,Xiaofei Wang,Yanlin Qin,Xueqing Qiu,Xuliang Lin
Efficient seawater oxygen evolution requires electrocatalysts that combine high activity, chloride tolerance, and long-term durability. Herein, a phosphorus–lignin ligand strategy is developed to construct an activation-prone P-CoMoO 3 @PLC precatalyst. Phosphorylated lignin enables homogeneous Co/Mo coordination, lattice P incorporation, oxygen-vacancy generation, and conductive carbon confinement, producing a metastable CoMoO 3 lattice with perturbed Co-P-Mo/Co-O-Mo coordination environments. P-CoMoO 3 @PLC requires only 180 mV at 10 mA cm −2 in simulated seawater, and sustains 500 mA cm −2 in natural seawater, outperforming commercial RuO 2 in durability. Operando analyses reveal an activation-induced dissolution–reconstruction pathway, in which partial Mo/P leaching converts the precatalyst into a Co(OH) 2 -derived CoOOH-rich interface coupled with residual CoMoO 4 . Co(OH) 2 -like species serve as hydroxylated intermediates, whereas CoOOH-like sites constitute the active OER phase; residual CoMoO 4 and the lignin-derived carbon matrix stabilize the reconstructed layer and promote charge transport. DFT calculations further show favorable *OH formation but thermodynamically unfavorable *Cl adsorption, explaining the preferential OER pathway and suppressed chlorine-related reactions. This work establishes bio-ligand metastability and reconstruction-driven interface engineering as a robust design strategy for seawater electrolysis.
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SENSORS AND ACTUATORS B-CHEMICAL
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2016
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IF 4.758
Juan Hou,Tianyu Zhou,Long Wang,Ping Zhang,Lan Ding
In this work, Zn(OH) 2 nanosheets embedded with carbon dots (CDs) were prepared through a template-free microwave-assisted route for the first time. The preparative strategy was facile, green and cost-effective. The final composites possessed uniform size distribution, good fluorescence property, excellent stability and fast adsorption ability for metal ions. A novel and ultrasensitive fluorescent assay has been proposed using CDs/Zn(OH) 2 composites as amplifying fluorescent sensors for rapid detection of Cu 2+ and Hg 2+ in real water samples. Aided by a Cu 2+ /Hg 2+ chelating agent, exclusive detection could be expected without cross-reactivity, as well as reversible and reproduced analysis. The detection limits were 0.3 nM for Cu 2+ and 0.2 nM for Hg 2+ , respectively. This assay could effectively enrich/separate and detect Hg 2+ and Cu 2+ simultaneously, revealing remarkable advantages including operational simplicity, high sensitivity, low cost and acceptable reproducibility.
研究领域:
材料科学
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分析化学
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环境科学
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纳米技术
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高影响因子
IONICS
·
2023
·Vol. 29
·期 4
·1479-1486
·
IF 2.8
Liu Yang,Chen Han,Lou Xiaoming,Wen Xiaoyu,Yin Zhenguo,Xiang Kaixiong
Rechargeable aqueous ammonium-ion batteries (AAIBs) have attracted more and more attention in energy storage devices because of great safety and cost-effectiveness, as well as excellent rate capability. Recently, it is the main exploration focus for the further improvement of AAIBs to develop suitable electrode materials. Herein, titanic acid and TiO 2 were simply synthesized by the facile co-precipitation approach. Titanic acid showed higher capacity of 104.5 mAh g −1 at the 0.1 A g −1 current density, and higher cyclability with the 91.2% capacity retention cycled 1000 cycles at 1 A g −1 . Titanic acid is promising as aqueous ammonium-ion batteries with great stability and capacity.
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Journal of Environmental Chemical Engineering
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2023
·
IF 7.7
Qinghan Chen,Li Wang,Dehui He,Bo Xiao,Xia Ran,Rong Li,Hong Xu,Jian Feng
A novel [email protected] 5 O 7 I/Bi(OH) 3 (AB) heterojunction was prepared and the enhanced photocatalytic antibacterial activity against Escherichia coli ( E. coli ) under visible light excitation was exhibited. 3 %AB (containing 3 wt% of Ag) presented best photocatalytic performance, and all of E. coli cells were inactivated within 5 min under natural solar light irradiation. The photocatalytic antibacterial mechanism of AB heterojunction was corroborated by SEM, live/dead cell staining and SDS-PAGE assay. The destruction of the cell membrane, the leakage of the intracellular protein and the decomposition of the protein were considered as the events occurred in the antibacterial process. The radical capture experiment confirmed that •O 2 – and e – played the dominant role in the destruction of the cell membrane and the decomposition of the protein. The improvement of the photocatalytic activity can be mainly ascribe to the construction of heterojunction, SPR effect resulted from Ag deposition, enhanced visible light absorption and more surface oxygen vacancies. These factors are advantageous to the generation of the photogenerated electrons and holes, and improve the spatial separation efficiency of the photogenerated charge. This study presented a promising [email protected] 5 O 7 I/Bi(OH) 3 heterojunction as the photocatalyst for the potential application in the treatment of the bacterial contamination.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2022
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IF 6.371
Yufeng Bai,Huizhi Yang,Lili He,Chunhua Ge,Renchang Zhai,Xiangdong Zhang
As electronic device integration and power density increase, materials must have brilliant microwave absorption properties and thermal conductivity to solve electromagnetic wave pollution and thermal management problems. In this work, we attempt to construct core-shell hydroxylated boron nitride nanosheets (BN-OH) @Fe 3 O 4 @PAn (BFeA) nanocomposites by chemical synthesis and in-situ growth design. The excellent magnetic properties of Fe 3 O 4 and the good electrical conductivity of PAn can form magnetic loss and electrical loss centers to play a synergistic effect in improving microwave absorption capacity. Meanwhile, with the wave-transmitting material BN-OH as the core, the electromagnetic waves can be reflected multiple times within the absorber, which further enhances the microwave absorption capability of BFeA. As a result, the minimum reflection loss (RL min ) of the composites can reach − 49.85 dB at 11.36 GHz, and the effective microwave absorption bandwidth (RL<−10 dB, EAB) is close to 8 GHz (8.5–16.5 GHz) at a thickness of 3 mm. Simultaneously, to improve the thermal conductivity (TC) of the BFeA and reduce the interfacial thermal resistance, we use hydroxyl and dopamine as the interface linking agent at the interfaces of BN-OH and Fe 3 O 4 , and Fe 3 O 4 and PAn, respectively. In this case, the TC of BFeA-2 reaches 0.98 W (m K) −1 at a total BN–OH content of only 13 wt. %, nearly 4 times that of the raw material (Fe 3 O 4 ). This work can provide a reference for developing materials with dual functions of thermal management and microwave absorption.
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Frontiers in Chemistry
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2023
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IF 5.5
Zhang Jie,Ren Quan,Wang Yun,Xiao Ruixue,Chen Hongyu,Xu Wenjia,Feng Yuhua
Hybrid nanostructures have garnered considerable interest because of their fascinating properties owing to the hybridization of materials and their structural varieties. In this study, we report the synthesis of [Au@Rh(OH)3]-Au island heterostructures using a seed-mediated sequential growth method. Through the thiol ligand-mediated interfacial energy, Au@Rh(OH)3 core-shell structures with varying shell thicknesses were successfully obtained. On these Au@Rh(OH)3 core-shell seeds, by modulating the diffusion of HAuCl4 in the porous Rh(OH)3 shell, site-specific growth of Au islands on the inner Au core or on the surface of the outer Rh(OH)3 shell was successfully achieved. Consequently, two types of distinct structures, the Au island-on-[Au@Rh(OH)3] dimer and Au island-Au bridge-[Au@Rh(OH)3] dumbbell structures with thin necks were obtained. Further modulations of the growth kinetics led to the formation of Au plate-Au bridge-[Au@Rh(OH)3] heterostructures with larger structural anisotropy. The flexible structural variations were demonstrated to be an effective means of modulating the plasmonic properties; the Au–Au heterostructures exhibited tunable localized surface plasmon resonance in the visible-near-infrared spectral region and can be used as surface-enhanced Raman scattering (SERS) substrates capable of emitting strong SERS signals. This diffusion-controlled growth of Au bridges in the Rh(OH)3 shells (penetrating growth) is an interesting new approach for structural control, which enriches the tool box for colloidal nanosynthesis. This advancement in structural control is expected to create new approaches for colloidal synthesis of sophisticated nanomaterials, and eventually enable their extensive applications in various fields.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Bin Han,Yuanfang Lin,Yu Luo,Weizhen Liu,Xueming Liu,Zonglin Weng,Xinwen Ou,Zhang Lin
Low-crystalline ultrathin nanosheets (UNSs) hold great potential for efficient photoreduction of anthropogenic CO 2 , while developing green synthetic methodologies and elucidating the structure-performance relationship remain significant challenges. Here, via a CaO-mediated strategy , we demonstrate a facile strategy for the large-scale production of low-crystalline Ni(OH) 2 UNSs from industrial wastes. The resultant Ni(OH) 2 UNSs deliver a superior CO formation rate of 9.2 μmol h −1 with a high selectivity of 93.1 % in low-concentration CO 2 (10 %), which remarkably outperforms that of Ni(OH) 2 NSs with high crystalline. Experimental and theoretical investigations demonstrate that the boosted performance originates from the fully exposed oxygen vacancies and low-coordination Ni sites, which facilitates the separation of photogenerated charge pairs and the adsorption and activation of diluted CO 2 . This work demonstrates a sustainable strategy for the large-scale synthesis of low-crystalline layered metal hydroxides, paving new avenues for the high-value utilization of industrial wastes in mitigating climate change.
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Materials Today Chemistry
·
2023
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IF 7.3
Shiwei Feng,Chengping Zhang,Hengdao Quan
A facile, safe, and environmentally friendly preparation method is described for the synthesis of AlF x (OH) 3-x by the activation of γ-Al 2 O 3 using HCFO-1233zd( E ) under various temperatures. Comprehensive characterization techniques including XRD , XPS, N 2 sorption, SEM, TEM , 27 Al MAS NMR, FTIR, and py-IR were employed, revealing that at lower temperatures such as 275 °C and 300 °C, the synthesis yielded AlF(OH) 2 , while at higher temperatures like 350 °C and 375 °C, pyrochlore AlF 1.5 (OH) 1.5 and metastable hexagonal tungsten bronze-type (HTB) β-AlF 3 were formed, with α-AlF 3 detected at 325 °C. Notably, a significant quantity of AlF(OH) 2 can be obtained at 325 °C within a specific time frame. This amorphous phase exhibits weak Lewis acid sites and a lower acid density, rendering it significantly more effective in the isomerization of HCFO-1233zd( E ) compared to strong Lewis acid catalysts such as AlF 1.5 (OH) 1.5 and β-AlF 3 , which could promote coke formation, leading to catalyst deactivation . Moreover, due to its limited further fluorination at 290 °C, the optimal catalyst exhibits prolonged lifespan and high efficiency in HCFO-1233zd( E ) isomerization.
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CHEMICAL ENGINEERING JOURNAL
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2023
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IF 15.1
Runren Jiang,Guanghua Lu,Tianjian Dang,Min Wang,Jianchao Liu,Zhenhua Yan,Haijiao Xie
The difficult separation of products after photocatalytic degradation of microplastics (MPs) limits the in-depth analysis of the MPs fragmentation process and degradation mechanism, and there are no studies about the photocatalytic degradation of functional groups modified MPs. In this work, we synthesized a “dissolvable” BiOBr-OH semiconductor-organic framework (SOF) to degrade polystyrene (PS) MPs modified by different functional groups, including –OH, –NH 2 , -SO 3 H, –COOH and -epoxy. First, a series of characterization confirmed that small molecules were intercalated into BiOBr layers to construct BiOBr-OH SOF. The BiOB-OH SOF system has significantly enhanced the photocatalytic degradation performance of microplastics, and BiOB-OH-0.75 has the strongest catalytic performance. The photocatalytic degradation performance of different functional groups modified PS-MPs differed significantly, with the weight loss order being -epoxy > –NH 2 > –OH > –COOH > -SO 3 H. After dissolving the catalyst, clean nano plastic particles were obtained after degradation, and it was found that six types of PS-MPs exhibited three different types of fragmentation processes. The surface potential of and fragmentation mode of different PS-MPs dominated the adsorption and photocatalytic degradation of BiOBr-OH SOF. The degradation products of PS-MPs are mainly composed of styrene and functional group-modified monomer molecules and multimolecular complexes. In addition, by analyzing the toxicity of the degradation products of microplastics, it was found that solid products were the main reason for their enhanced toxicity. Finally, based on the photoelectrochemical characterization and free radical analysis, the mechanism of photocatalytic degradation of different functional groups modified PS-MPs by BiOBr-OH SOF was proposed.
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CERAMICS INTERNATIONAL
·
2023
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IF 5.2
Wenwu Zou,Zhenze Xie,Chang Du
Basic copper chloride (Cu 2 (OH) 3 Cl) microspheres with different surface nanostructure were synthesized via the dissolution regulation of calcite in CuCl 2 solution. We studied the influence of CuCl 2 concentration, reaction time and reaction temperature on the formation of Cu 2 (OH) 3 Cl, and the products were characterized by X-ray diffraction, Fourier transform infrared spectroscopy , field emission scanning electron microscopy and transmission electron microscopy . The concentration of CuCl 2 has a great influence on the dissolution rate of calcite, dispersed microsphere particles assembled by nano-blocks formed in 20 mM CuCl 2 solution. The surface of Cu 2 (OH) 3 Cl microsphere change from nano-block to nano-rod with increasing the reaction time from 20 min to 2 h Cu 2 (OH) 3 Cl microspheres with surface structure changed from nano-sheet, nano-plate to nano-block with the reaction temperature increase from 37 °C to 70 °C. The Cu 2 (OH) 3 Cl microsphere also displays superior antibacterial properties against S. aureus and E. coli . This work displays a new strategy to synthesize functional materials by the use of dissolution regulation methods.
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