CHEMICAL ENGINEERING JOURNAL
·
2017
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IF 6.216
Runming Wang,Gang Cheng,Zan Dai,Jie Ding,Yunling Liu,Rong Chen
A general ionic-assisted microwave-ultrasonic combined synthetic strategy was developed to fabricate Bi 2 E 3 (E = S, Se, and Te) hierarchitectures. To understand the crystal phase transformation and morphological evolution of Bi 2 S 3 hierarchical nanostructures, the fabrication of Bi 2 S 3 hierarchitectures was investigated by varying sulfidation time and chlorination time. A topotactic transformation from BiOCl microsphere to Bi 2 S 3 hierarchitectures was proposed. It was found that the structure, size, and morphology of Bi 2 S 3 hierarchitectures could be delicately engineered by varying chlorination time, alkyl chain length, and concentration of ionic liquid. Moreover, the as-prepared Bi 2 S 3 hierarchitectures displayed superior capacity of Cr(VI) photoreduction to P25 and irregular Bi 2 S 3 nanostructures under visible light irradiation. Effects of morphology, pH value of reaction system, Cr(VI) concentration, and catalyst dosage on the Cr(VI) photoreduction capacity of Bi 2 S 3 hierarchitectures were also discussed. The enhancement of photoreduction capacity is not only attributed to the intrinsic good electron transfer ability of Bi 2 S 3 , but also to synergetic effects of special architectures, wide photoresponse range, high light photoadsorption, high BET surface area and good electron-hole separation performance. The systematic condition experiments and Cr(VI) photoreduction in electroplating and tannery wastewater experiments further demonstrated that the hierarchical Bi 2 S 3 nanospheres can be used in the actual Cr(VI)-containing wastewater treatment.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2023
·Vol. 29
·期 7
·2925-2933
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IF 2.8
Wang Lu,Li Jingjing,You Junhua,Wang Zhiwei,Qi Xiaojing,Xu Jingsheng
NiCo 2 O 4 /NiMoO 4 hierarchical composite structure is used for high-performance supercapacitors electrode materials. The electrode material is grown directly on the conductive carbon cloth, which effectively reduces the contact resistance between the collector and the active material, and provides a favorable skeleton structure for NiCo 2 O 4 /NiMoO 4 . In this work, NiCo 2 O 4 /NiMoO 4 electrodes were prepared under optimal conditions of primary hydrothermal time of 12 h, annealing temperature of 350 °C, and secondary hydrothermal time of 8 h. The optimized hierarchical NiCo 2 O 4 /NiMoO 4 electrode exhibits a high areal capacitance of 3.85 F·cm −2 (at a current density of 4 mA·cm −2 ) and better cycle stability than the NiCo 2 O 4 and NiMoO 4 electrode, respectively. The constructed asymmetric supercapacitor NiCo 2 O 4 /NiMoO 4 //AC has a satisfactory energy density of 38.69 Wh·kg −1 at 228.56 W·kg −1 power density. At the current density of 4 mA·cm −2 , ASC devices still have a capacity retention rate of 90.88% after 5000 cycles, indicating their potential application in energy storage devices.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 11
·6329-6340
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IF 10.7
Bingjie Wen,Nizao Kong,Min Huang,Liqin Fu,Yexin Tian,Zhixiao Liu,Zhongchao Wang,Lezhi Yang,Fei Han
A single two-dimensional material often struggles to satisfy all the performance requirements of electrode materials for sodium-ion batteries. However, constructing a hierarchical heterogeneous two-dimensional stacking structure can effectively combine the advantages of multiple materials and make up for the insufficiency of a single element. This work applied a pre-intercalation–sulphuration concept and liquid-phase coating modification by constructing a hierarchical nano-flake/micro-lamellar complex structure. In this composite material, MoS2 nanosheets and V2C MXene layers overlap and interact to prevent nanoparticle agglomeration and micron flakes collapse simultaneously. The MoS2/MXene hierarchical structure is sandwiched between ultrathin and dense carbon layers to form a multifaceted conductive skeleton and a twofold protection mechanism. The coating reduces the electrolyte contact area and prevents the escape of polysulfide byproducts. Accordingly, the designed MSVC@C demonstrates superior Na+ storage capacities (612.4 mA h g−1 at 0.5 A g−1 after 600 cycles) and outstanding rate performance (304.42 mA h g−1 at 10 A g−1). Experimental results and theoretical calculations verify that the MoS2 and V2C heterostructure promotes the electrochemical performance owing to the better electronic conductivity and lower ion diffusion energy barrier. Moreover, this structure optimization strategy applies to various MXene guests (e.g., V2C and Nb2C) to prepare a variety of hierarchical nano–micro structures that are expected to be promising two-dimensional electrode materials for SIBs with application prospects in the future.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
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2020
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IF 5.778
Zhangdi Li,Tao Zhang,Mingyou Wang,Fengxian Qiu,Xuejie Yue,Dongya Yang
Due to the variety of oily wastewater and complexity of separation system, it has put forward new challenge and requirement to separation materials for on-demand separation of various oil/water mixtures. Here, we reported a facile waste-to-resource strategy to rationally fabricate hierarchical ZnO nanopillars coating onto the surface of waste brick grains (ZnO/WBG) via simple physical process and in-situ growth technique. Specifically, the directly as-prepared ZnO/WBG possess superhydrophilic/underwater superoleophobic (UWSOB) properties and modified ZnO/WBG by organosilicon reagent possess quasi superhydrophobic/superoleophilic (SHOBI) properties. It is also worth noting that this discrete ZnO/WBG with opposite wettability can be accumulated into ZnO/WBG layer with numerous tortuous channel structure, making it feasible for on-demand separating various oil/water mixtures whether immiscible light- and heavy-oil/water mixtures or oil-in-water and water-in-oil emulsions. It has been demonstrated that the filter layers with opposite wettability exhibit high separation efficiency and flux, excellent chemical stability and admirable recyclability . Thus, this novel and cost-effective ZnO/WBG layer holds great promise for large-scale and versatile oil/water separation. Additionally, this work presents a sustainable perspective of effectively utilizing waste brick to construct workable functionalized materials with tremendous application potential, showing far-reaching value and significance in fundamental research and environmental protection.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
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2022
·Vol. 12
·期 15
·2700
·
IF 5.719
Lijun Hu,Zhichao Ding,Fei Yan,Kuan Li,Li Feng,Hongqing Wang
Oxygen vacancy manipulation and hierarchical morphology construction in oxygen-containing semiconductors have been demonstrated to be effective strategies for developing high efficiency photocatalysts. In most studies of bismuth-based photocatalysts, hierarchical morphology and crystal defects are achieved separately, so the catalysts are not able to benefit from both features. Herein, using boiling ethylene glycol as the treatment solution, we developed an etching-recrystallization method for the fabrication of 3D hierarchical defective BiOCl at ambient pressure. The target hierarchical 3D-BiOCl is composed of self-assembled BiOCl nanosheets, which exhibit a hexagonal prism-like morphology on a micron scale, while simultaneously containing numerous oxygen vacancies within the crystal structure. Consequently, the target catalyst was endowed with a higher specific surface area, greater light harvesting capability, as well as more efficient separation and transfer of photo-excited charges than pristine BiOCl. As a result, 3D-BiOCl presented an impressive photocatalytic activity for the degradation of tetracycline hydrochloride in both visible light and natural white light emitting diode (LED) irradiation. Moreover, an extraordinary recycling property was demonstrated for the target photocatalyst thanks to its hierarchical structure. This study outlines a simple and energy-efficient approach for producing high-performance hierarchically defective BiOCl, which may also open up new possibilities for the morphological and crystal structural defect regulation of other Bi-based photocatalysts.Keywords:BiOCl;photocatalytic;lattice defects;hierarchical structure;degradation;ambient pressure
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
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IF 9.7
Jian Tang,Jun Fang,Haochen Yao,Jianglong Wei,Geng Gao,Yusong Yang,Bin Yang,Yaochun Yao
Hierarchical structure design and heterostructure engineering are effective strategies for enhancing hydrogen evolution reaction (HER) performance, yet their synergistic integration remains underexplored. In this work, a novel hierarchical P-NiMoO 4 @Net-like Ni 2 P heterostructure HER electrocatalyst was prepared via a two-step hydrothermal method followed by low-temperature phosphorization. The three-dimensional net like Ni 2 P was closely integrated with one-dimensional phosphorus-doped NiMoO 4 micro/nanorod arrays, enabling hierarchical structural assembly and the formation of synergistic heterointerfaces. The hierarchical structure significantly increased active site exposure, with a double-layer capacitance of 254.4 mF cm −2 , more than five times that of single-component Ni 2 P (48.4 mF cm −2 ). Density functional theory calculations revealed that the heterostructure lowered the d-band center of active Ni 3 sites and optimized the hydrogen adsorption energy, thereby enhancing HER activity. The P-NiMoO 4 @Net-like Ni 2 P catalyst exhibited an alkaline HER overpotential of 49 mV at a current density of 10 mA cm −2 . It also maintained stable operation for 100 h at 10mA cm −2 and 120 h at 100mA cm −2 . This study demonstrates the potential of integrating hierarchical and heterostructural strategies, providing a reference for advanced nanostructured catalyst development.
研究领域:
材料科学
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电化学
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催化科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
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IF 8
Jiacheng Xi,Kai Liang,Niu Yao,Huiyu Yuan,Junyan Cui,Xinghui Hou
Hydrogen sulfide (H 2 S) is a toxic and flammable substance that its effective real-time detection has great significance for ensuring safety. Currently, the detection of low concentration H 2 S remains a challenge. In this paper, the 3D monoclinic-tetragonal mixed phase Mo/Bi- x with hierarchical structure has been successfully prepared by a simple one-step solid-phase method for low concentration H 2 S detection. The effect of Mo doping on its morphology, structure, composition and gas sensitivity of BiVO 4 has been investigated. XRD, SEM, TEM, Raman, UV–vis and XPS techniques are employed to explore the potential sensing mechanism. The results show that the addition of Mo leads to a gradual transformation of BiVO 4 from a class cube structure to a strip structure, accompanied by partial conversion of the monoclinic phase to the tetragonal phase. For the typical sample (Mo/Bi-0.1), it exhibits extremely high response ( R g / R a ) of 43.5–10 ppm H 2 S at 200 °C, high selectivity ( Q H 2 S / methanol = 7.15 ), rapid response and recovery time of 11/15 s and relatively low theoretical detection limit (20.5 ppb). This can be attributed to the presence of unique long plate structures, abundant oxygen vacancies, chemisorbed oxygen and a monoclinic-tetragonal phase heterojunction. This research provides a potential strategy for the design of other H 2 S sensitive materials.
研究领域:
材料科学
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传感器技术
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2018
·Vol. 53
·期 22
·15487-15499
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IF 2.993
Yang Ming,Rao Richuan
In this work, nonmetallic S was doped into hierarchical Ni(OH) 2 hollow microspheres by ethanol solvothermal method using thiourea as sulfur source. Although the morphology of precursor Ni(OH) 2 is maintained, the surface states and pore properties had greatly changed after S doping. Using the as-prepared S-doped Ni(OH) 2 as adsorbents for the removal of Congo red (CR), the S-doped Ni(OH) 2 exhibited much better adsorption capacity compared with undoped Ni(OH) 2 . The adsorption behavior of both Ni(OH) 2 and S-doped Ni(OH) 2 followed the pseudo-second-order kinetic model and intraparticle diffusion model. The equilibrium data of Ni(OH) 2 could be better fitted by Langmuir model, while Freundlich model could be better used to describe the S-doped Ni(OH) 2 with a much larger adsorption capacity toward CR. The tuned microstructure and changed surface states of adsorbent after S doping may be responsible for the enhanced adsorption performance. Therefore, the doping of S species into hierarchical Ni(OH) 2 paves a new way to tune the microstructure and surface states of Ni-based materials.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 85
·81809-81813
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IF 3.289
Menghu Wang,Hang Ping,Hao Xie,Baoli Chen,Min Yan,Weijian Fang,Zhengyi Fu
A genetically modified bacterial surface not only serves as a confined environment for controlling the monodispersity of particle size, but also provides a carbon source in situ. The carbon coated SnO2 composite exhibits good lithium storage properties as an anode electrode, which are due to the ultrasmall size of the particles, the carbon coating and mesoporous structure.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Crystals
·
2021
·Vol. 11
·期 10
·1247
·
IF 2.589
Changsheng Zhang,Kai Fan,Ge Ma,Chi Lei,Wei Xu,Jie Jiang,Bing Sun,Hongxing Zhang,Yunfeng Zhu,Song Wen
Hierarchical zeolites attract people’s attention due to their enhanced mass transfer properties in catalytic reactions. The research over obtaining these zeolites in green and efficient methods is of great significance for the current post-treatments and templating strategies tend to be costly for hierarchical zeolite synthesis. In this research, nanosized mesoporous ZSM-5 (SN-ZSM-5) zeolites have been synthesized without the addition of mesoscale templates under highly concentrated conditions. The physicochemical characteristics were systematically investigated by XRD, SEM, N2 sorption, TEM, and NMR. The SEM images showed ZSM-5 crystals with sizes between 50–110 nm were obtained. N2sorption and high-resolution TEM images gave direct evidence for the hierarchical structure of SN-ZSM-5. The forming mechanism for the hierarchical structure was proposed that the etching effect of the highly alkaline environment for the starting gels played a critical role in the formation of hierarchical structure. Catalytic tests in methanol-to-olefins (MTO) showed the SN-ZSM-5 performed a longer catalyst lifetime and higher propylene selectivity than the conventional ZSM-5 zeolites (C-ZSM-5) obtained from a traditional hydrothermal method. The features of hierarchical structure in the SN-ZSM-5 crystals and the sustainability for synthesis method could show a promising choice for wide applications of these SN-ZSM-5 zeolites in the future.Keywords:ZSM-5 zeolite;efficient synthesis;hierarchical;nano crystals
研究领域:
材料科学
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催化化学
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2015
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IF 3.453
Xiujuan Chen,Zhiguo Li,Li Wei,Xiaoli Li,Siping Liu,Jiyou Gu
In this study, 3D hierarchical cabbage-like carbonaceous materials (CCMs) have been fabricated by one-step hydrothermal carbonization of furfural in the presence of cobalt acetylacetonate under mild condition. The morphologies and structures of the CCMs could be well controlled by regulating the reaction conditions including reactant concentration, reaction temperature and time. It was revealed that the cobalt acted as a structure-directing agent during the formation of the cabbage-like structures, which induced the morphology evolution of the products from microspheres into hierarchical CCMs. The good electrochemical performance and well-loading of Pt nanoparticles on the surface of the CCMs further indicated that the CCMs have potential applications in electrochemical capacitors and heterogeneous catalysis .
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Xinxin Shi,De Sun,Dongmin Yue,Bingbing Li,Jingrui Zhu,Lingyu Zu,Fei Liu,Xiaojun Li
Solar-driven interfacial evaporation (SDIE), a technology for local solar energy conversion through photothermal materials, has been greatly developed. The metal oxide semiconductors have excellent photothermal conversion performance and are considered the most promising materials for photothermal conversion. Hierarchical structure with large surface area is beneficial to improve the photothermal conversion efficiency through the light-trapping effect and reduces the evaporation enthalpy of water. Herein, chromium black (Cr, Cr 2 O 3 , CrO 3-x ) photothermal membranes (CBPM) with ganoderma-like hierarchical structure were prepared by electrochemical oxidation . Due to the small interlayer spacing of the ganoderma-like structure, the light absorption of CBPM (M7) can reach 78.53 %, which in turn promotes the conversion of solar energy due to the low thermal conductivity of the chromium black layer, resulting in a high evaporation rate of 1.64 kg m −2 h −1 . The solar-to-vapor conversion efficiency is up to 90.39 % under 1 sun irradiation. Meanwhile, the superhydrophilicity of the membrane is conducive to salt redissolution at night, so there was not much performance degradation after 24 cycles. This study provides a new solution for water treatment using chromium black as a photothermal material with great potential for solar production of fresh water.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）