JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Zhenhua Ge,Bin Fu,Xing Li,Jinping Zhao,Bo Ma,Zhiqiang Luo,Yantao Chen
Electrochemical water splitting is a very prospective technique to obtain the green hydrogen fuel . The oxygen evolution reaction becomes a limitation owing to the multiple electron transfer process. Thereby, a lot of attention is paid on the development of noble-metal free electrocatalysts for boosting the water oxidation process . The heterostructure of Mn 3 O 4 nanoparticles on Cu(OH) 2 nanowire arrays is fabricated, which exhibits an electrocatalytic activity close to RuO 2 . Compared with the single (hydro)oxides, the largely improved performance of the heterostructure towards water oxidation can be attributed to the enhanced charge transfer by the electronic interaction across the interface and the increased active sites for the rational combination of different active species . This work can be valuable for highlighting the role of heterostructure in the design and development of novel transition metal-based electrocatalysts for water oxidation.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Qiangli Lv,Haoran Guo,Duo Xu,Yuling Zhai,Hua Wang,Tao Zhu,Xing Zhu,Kongzhai Li,Zhihong Yang,Zhishan Li
The urea oxidation reaction (UOR) is considered as an alternative to the oxygen evolution reaction for high-efficiency hydrogen production, because it can simultaneously achieve wastewater treatment and hydrogen production. However, the slow kinetics of the UOR hinder its widespread adoption due to relatively complex molecule, it is urgent to rational design and preparation of high-performance UOR catalysts. Herein, we report a simple synthesis of the NiMn-LDH@Rh(OH) 3 heterostructure and a systematic investigation of urea-assisted electrolytic hydrogen production， significantly enhances the efficiency of urea electrolysis. The amorphous Rh(OH) 3 structure provides a higher density of active sites and greater catalytic surface exposure, while the synergistic interaction between Rh(OH) 3 and NiMn-LDH improves both electrical conductivity and catalytic performance. The catalyst of NiMn-LDH@Rh(OH) 3 –3 requires only 1.29 V overpotential to achieve a current density of 10 mA cm −2 in a 1.0 M KOH and 0.33 M urea solution, surpassing other catalysts. Furthermore, it demonstrates remarkable stability with minimal potential increase during 48-hour chronopotentiometric tests at 100 mA cm −2 . This work making the developed strategy promising for the rational design of highly active electrocatalysts for green hydrogen production and the treatment of urea-rich wastewater.
研究领域:
材料科学
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能源化学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Optical Materials
·
2025
·
IF 3.8
Feifei Qin,Yue Cao,Chengwei Wang,Guogang Zhang,Xiaoxuan Wang,Feng Chen,Gangyi Zhu,Yongjin Wang
Nowadays, most solid-state lighting-based visible light communication (VLC) technology suffers from the color converter’s short optical bandwidth or low stability. Herein, we fabricated MAPbBr3@PbBr(OH) nanocrystals (NCs) with high optical bandwidth and water-stable properties for color conversion of VLC and a white light-emitting diode (LED) system. The sample’s characteristic photoluminescence (PL) spectrum is green emission peaked near 529 nm. As a color converter, it has a high bandwidth capacity for devices. The sample indicates internal quantum efficiency (IQE) of about 38.33% and a PL decay time of about 5.5 ns, and it can maintain its PL properties in water for over 90 days The calculated optical bandwidth is about 49.4 MHz. Its measured −3 dB bandwidth with a 405 nm laser diode can reach 25 MHz with a data rate over 50 Mbps. More interestingly, the perovskite NCs can replace the green phosphor to build a high-speed and multicolor LED, and the −3 dB bandwidth can be maintained at over 80% in this case. These features are far beyond the abilities of commercial green phosphors. Finally, we demonstrate an underwater text transmission system with a 405 nm LED, perovskite color conversion layer, and low-cost silicon-based photodetector.
研究领域:
材料科学
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光学工程
·
通信技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Bei-Bei Zhang,Ping Liu,Hao-Ran Wang,Yan-Yang Li,Lin Zhang,Qing-Chao Liu,Zhong-Jun Li,Hong-Chang Yao
Developing efficient photocatalysts for solar-driven overall water vapor splitting is crucial for sustainable hydrogen production. However, current photocatalytic efficiencies are limited by inadequate hygroscopicity, sluggish proton transport, and rapid recombination of photogenerated electron-hole pairs. Here, we report the successful synthesis of an amorphous Ni(OH) 2 /Ni 2 B heterojunction material with a core–shell structure by regulating the reducing environment during the formation of nickel boride. This material exhibits highly efficient overall water vapor splitting performance without any cocatalysts. Under simulated solar irradiation, the optimized sample achieves a hydrogen production rate of 976 μmol·g −1 ·h −1 , with near-stoichiometric evolution of hydrogen and oxygen, an apparent quantum yield of 5.4 %, and a solar-to-hydrogen conversion efficiency of 3.8 %. The enhanced performance is attributed to the unique amorphous/amorphous heterojunction structure that promotes effective charge separation, the abundant surface hydroxyl groups that improve proton transport and hygroscopicity, and the formation of photo-induced frustrated Lewis pairs (FLPs). Our findings shed light on the critical role of amorphous structures and surface chemistry in boosting photocatalytic activity, paving the way for the rational design of advanced photocatalysts for overall water vapor splitting.
研究领域:
材料科学
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可再生能源
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2013
·Vol. 15
·期 8
·1-8
·
IF 2.175
Wang Minmin,Ren Wanzhong,Zhao Yunan,Liu Yan,Cui Hongtao
In this work, β-Ni(OH) 2 monolayer nanosheets, which had been thought to be unachievable, were successfully prepared for the first time by a one-pot strategy using epoxide as precipitation agent and sodium dodecyl sulfate (SDS) as surfactant. The characterization results indicate that the formation of monolayer morphology depends on the mediation of SDS molecules. The XRD patterns demonstrate the loose and defective packing of Ni(OH) 2 layers in the SDS intercalated samples. The disappearing of vibration band of free hydroxyl groups in the FTIR spectra suggests the interlayer separation resulted by SDS. The TEM and AFM images further confirm the formation of monolayer nanosheets. It is proposed that the in situ modification of the secondary growth unit of β-Ni(OH) 2 by SDS allows its two-dimensional anisotropic growth through steric hindrance of SDS molecules. In addition, this effect allows isolation of β-Ni(OH) 2 from solvent with keeping of monolayer nanosheet state in dry powder. The electrochemical measurement results indicate that β-Ni(OH) 2 monolayer nanosheets own much higher urea electrolysis performance than their corresponding multilayer structure.
研究领域:
材料科学
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电化学
·
纳米材料
·
能源转换
·
无机合成
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Qiao Zhao,Hanbo Li,Yaan Cao
A series of the In(OH) 3 species modified ZnS (ZnS–In(OH) 3 X% (X = 2, 5, 7, 10)) photocatalysts were synthesized by a hydrothermal method . ZnS–In(OH) 3 X% (X = 2, 5, 7, 10) exhibited the improvement of photocatalytic activity for the photoreduction of CO 2 into CO compared with ZnS. Characterized by X-ray diffraction (XRD), fourier transforms infrared spectra (FT-IR), high resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS) valence band spectra, UV–vis diffuse reflectance spectra, photoluminescence (PL) and time-resolved PL decay curves, the crystal structure, band structure and behaviors of photogenerated charge carriers for photocatalyst were explored up. It was revealed that the modification of In(OH) 3 surface species on surface of ZnS can prolong the fluorescence lifetimes of photogenerated charge carriers, enhance the separate of photoinduced charge carriers efficiently and promote better matching between the band structure and the redox potential of the CO 2 /CO, resulting in improvement of photocatalytic activity efficiently for ZnS–In(OH) 3 X% (X = 2, 5, 7, 10) photocatalysts . This work may offer a new understanding to study the effect of surface species modification on photocatalytic performance of photocatalyst.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Shuaipeng Wang,Li Xu,Weixin Lu
Non-noble metal catalysts with high-performance are intensively exploited toward water electrolysis. Herein, we fabricate a novel Ni 3 S 2 @Co(OH) 2 heterostructure with a tentative method combining hydrothermal method with electrodeposition, in which the Ni 3 S 2 nanosheets are evenly integrated with Co(OH) 2 nanoparticles. Electrochemical tests reveal preeminent catalytic activities and durability on this heterostructure for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). It presents high catalytic activities of 110 and 257 mV at 10 mA cm −2 for HER and OER, respectively, in 1.0 M KOH solution. Moreover this bifunctional electrode requires only 1.61 V to reach 10 mA cm −2 and shows excellent durability when assembled as an electrolyzer, superior than that of Pt-C||IrO 2 . The promoted activities are benefited from the interfacial cooperation and synergistic effect between Ni 3 S 2 and Co(OH) 2 , because of which the charge-transfer ability is enhanced and surface reactivity is of furtherance. This work is of very profound significance on electrocatalysts for water splitting, specific performances: (1) This heterostructure is synthesized based on interface engineering. (2) The promoted performance is due to the synergistic effect of two onefold-components. (3) The catalysis activities for HER and OER can synchronously reach ideal states when it is used as bifunctional catalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Bin Zhang,Xiaodong Guo,Xin Feng,Xiaoxia Duan,Guilong Wang,Chao Yang
The debenzylation reaction of hexabenzylhexaazaisowurtzitane (HBIW) and 2,6,8,12-tetraacetyl-4,10-dibenzyl-2,4,6,8,10,12-hexaazaisowurtzitane (TADBIW) to synthesize 2,6,8,12-tetraacetyl-2,4,6,8,10,12-hexaazaisowurtzitane (TAIW) is the major challenge in the production of 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (HNIW). This is primarily attributed to the reaction needing a lot of palladium catalysts, which tend to deactivate rapidly during the process. In this work, a series of Pd(OH)2/C catalysts were successfully prepared through a convenient deposition-precipitation method by controlling the flow rate of the PdCl2 solution. Employing the 10% Pd(OH)2/C–F0.5 sample, the debenzylation reaction was successfully completed with a lower usage of Pd and shorter time of reaction. For the HBIW debenzylation reaction, the yield of TADBIW was 87.4% at low temperature (25 °C) when 1‰ Pd/HBIW was used, and the higher yield was 89.8% at high temperature (45 °C) when 3‰ Pd/HBIW was used. The TADBIW/Pd/h values of them were 42.5 and 95.7, respectively. For the TADBIW debenzylation reaction, the complete conversion of the reactant was realized when Pd/TADBIW was 2‰. The value of TAIW/Pd/h was 154.6 when Pd/TADBIW was 4‰, which was higher than the reports. Compared to the reported catalysts, the dosage of Pd used in the debenzylation reactions of HBIW and TADBIW was significantly decreased. Furthermore, the 10% Pd(OH)2/C–F0.5 sample was recycled six times with similar performance, demonstrating excellent stability. Based on the analysis of characterization results, it is effortless to find that the flow rate of the PdCl2 solution plays a key role in controlling the adsorption behavior of palladium species on activated carbon. The lower flow rate is beneficial to obtaining Pd nanoparticles with a smaller size, a higher proportion of Pd2+, and a higher metal distribution. This study may provide a simple way to develop palladium catalysts with high performance for related applications.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2015
·
IF 4.772
Di Bao,Peng Gao,Yanbo Wang,Han Zhou,Yujin Chen,Guorui Chen,Piaoping Yang,Xitian Zhang
In this paper, Cd(OH)2 1D three-side nanobelt architectures have been fabricated through a facile two-phase reaction system. Considering their electropositive character proven by zeta potential measurement, the as-obtained Cd(OH)2 nanomaterials have been applied to capture negatively charged DNA. On the basis of the above results, the Cd(OH)2 nanomaterials have been employed for trapping negatively charged double-stranded DNA molecules (salmon sperm DNA). Assisted by the detailed observation of their DNA interaction results as well as through UV–vis spectroscopy, infrared imaging automatic target recognition (IRATR) and inductive coupled plasma atomic emission spectrometer (ICP-AES) measurements, it has been clearly shown that this 1D nanoarchitecture can effectively trap and release DNA molecules without use of any other organic reagents. In addition, a miniaturized electrochemical DNA-releasing device based on the Cd(OH)2 1D three-side nanobelt architectures has been fabricated. Using this device, it is possible to recycle the Cd(OH)2 nanostructures. In addition, the Cd(OH)2 nanomaterials maintain their nanostructures, and no Cd2+ ions were released in repeated DNA separation and transfer processes, which demonstrate their practicality for DNA trapping.
研究领域:
纳米材料科学
·
生物物理学
·
分子生物学
✓ 已验证
产品关联
DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2024
·
IF 10.7
Yanpei Xu,Haoyu Wu,Meng Sun,Hongyu Song,Chuxiao Sun,Fudong Jia,Qi Wang
In the detection of biomolecules, surface plasmon resonance (SPR) sensors require high sensitivity. In this study, we propose a sensitivity-enhanced functionalized plasmonic interface based on Ag–TiO 2 –Co(OH) 2 nanosheets structure. Compared to unmodified SPR sensors, the sensitivity of the sensor decorated with TiO 2 and Co(OH) 2 nanosheets is increased by 130.84%, reaching 5764.27 nm/RIU. This enhancement is attributed to the high refractive index of the coating, as well as the high specific surface area and abundant active sites provided by the synthesized Co(OH) 2 nanosheets with a multi-grooved structure. Additionally, employing a double-antibody sandwich method, the antibody-functionalized plasmonic interface enables specific detection of human serum albumin (HSA). The linear response of this sensor was in the wide range of 0.4–150 μM, and the LOD reached 154.89 nM(K D is approximately 1.73 × 10 −6 M). This novel SPR sensor offers a new strategy for biochemical sensing and provides a highly sensitive platform for immunoassays.
研究领域:
生物传感器
·
纳米材料
·
医学检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Inorganic Chemistry Frontiers
·
2017
·Vol. 5
·期 1
·172-182
·
IF 4.036
Bingrong Wang,Yang Cao,Yong Chen,Ruzhi Wang,Xiaohong Wang,Xiaoyong Lai,Chunhui Xiao,Jinchun Tu,Shujiang Ding
NiCo2O4 nanoflowers were synthesized through a microwave-assisted hydrothermal method and used as a type support for Ni(OH)2 nanoparticles. In the three-dimensional NiCo2O4 nanoflowers, two-dimensional ultrathin nanosheets supported the Ni(OH)2 nanoparticles by homogeneous precipitation. The materials were characterized by field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. The electrochemical oxidation of methanol was probed through the NiCo2O4/Ni(OH)2 modification on a glassy carbon electrode in an alkaline medium by employing cyclic voltammetry (CV) and chronoamperometry (CA). The current density of the NiCo2O4/Ni(OH)2 electrode in 1 M KOH with 0.5 M methanol ascends to 92.3 A g−1 and restores to 94.6% of the primitive value through the replacement with a new solution after a long-term CV cycling (500 cycles). Therefore, the compounds further corroborate their excellent electrocatalytic activity and superb perennial stability for methanol oxidation. This study demonstrates that NiCo2O4/Ni(OH)2 is a peculiar material with an outstanding performance in direct methanol fuel cells.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2024
·
IF 7.4
Jian Jia,Mei-Ling Xu,Xiao-Jie Jiang,Li-Na Zhang,Xiao-Lei Lu,Jiang Zhu,Xin Cheng
The utilization of cement-stabilized iron tailings as pavement base necessitates rigorous scrutiny of heavy metal ion leaching, particularly under fluctuating environmental pH conditions. Given the insufficient capacity of cement to stabilize Cr(Ⅵ), this paper explores the integration of defect-engineered metal-organic frameworks (MOFs) as additives in cement-stabilized iron tailings to reduce Cr(Ⅵ) leaching. Results shows that the utilization of MOFs material mitigates Cr(VI) leaching in cement-stabilized iron tailings while enhancing their mechanical properties. The Cr(Ⅵ) leaching from samples with the addition of UiO-66-(OH)₂ and UiO-66-(OH)₂-D exhibited a substantial reduction of 60.2 % and 88.6 %, respectively. The stabilized mechanism is attributed to the strong affinity between Cr(Ⅵ) and hydroxyl groups in MOFs. Furthermore, UiO-66-(OH) 2 -D has a larger pore diameter to expose more hydroxyl groups, which greatly improves its adsorption performance for Cr(Ⅵ). Meanwhile, the unconfined compressive strength (UCS), splitting strength and compressive resilience modulus increased by 13.4 %, 35.1 % and 45.7 %, respectively. The mechanisms underlie that the MOFs enhanced the early hydration process and optimized of the pore size distribution within the solidified body. This study presents a viable and efficient approach for the sustained mitigation of Cr(Ⅵ) leaching within cement-stabilized iron tailings.
研究领域:
环境科学
·
材料科学
✓ 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）