RSC Advances
·
2015
·Vol. 6
·期 6
·4329-4334
·
IF 3.84
Jikui Wang,Jiahong Guo,Pengxiang Si,Wanping Cai,Yuming Wang,Genhua Wu
An In(OH)3–PDMS sponge has been synthesized by covalent modification of PDA. The sponge can switch surface wettability reversibly between superhydrophobicity and superhydrophilicity when detecting ammonia. The water contact angle changes from 141.5° to 0° after storage in an ammonia atmosphere, which means an ammonia responsive surface wettability switch. The minimum NH3·H2O concentration that the In(OH)3–PDMS can detected is 5% in 2 h. This kind of quick and sensitive ammonia detector is promising simply by virtue of the surface wettability conversion.
研究领域:
材料科学
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化学工程
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2021
·Vol. 12
·期 1
·1-13
·
IF 14.919
Ji Xixi,Lin Yanhong,Zeng Jie,Ren Zhonghua,Lin Zijia,Mu Yongbiao,Qiu Yejun,Yu Jie
Development of excellent and cheap electrocatalysts for water electrolysis is of great significance for application of hydrogen energy. Here, we show a highly efficient and stable oxygen evolution reaction (OER) catalyst with multilayer-stacked hybrid structure, in which vertical graphene nanosheets (VGSs), MoS 2 nanosheets, and layered FeCoNi hydroxides (FeCoNi(OH) x ) are successively grown on carbon fibers (CF/VGSs/MoS 2 /FeCoNi(OH) x ). The catalyst exhibits excellent OER performance with a low overpotential of 225 and 241 mV to attain 500 and 1000 mA cm −2 and small Tafel slope of 29.2 mV dec −1 . Theoretical calculation indicates that compositing of FeCoNi(OH) x with MoS 2 could generate favorable electronic structure and decrease the OER overpotential, promoting the electrocatalytic activity. An alkaline water electrolyzer is established using CF/VGSs/MoS 2 /FeCoNi(OH) x anode for overall water splitting, which generates a current density of 100 mA cm −2 at 1.59 V with excellent stability over 100 h. Our highly efficient catalysts have great prospect for water electrolysis.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
PubMed
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2019
·Vol. 30
·期 4
·879-888
·
IF 2.162
Rui Gao,Shuguang Wang,Keqing Zhou,Xiaodong Qian
In the present work, a facile and environmental method was developed to fabricate the novel functionalized MoS 2 hybrid. Firstly, MoS 2 nanosheets were coated with polydopamine (PDA) through the self-polymerization of dopamine (MoS 2 -PDA) in a buffer solution. Then the decoration of Ni(OH) 2 on the MoS 2 -PDA was synthesized because of the strong affinity of Ni 2+ with hydroxyl groups in PDA. Finally, the as-synthesized MoS 2 -PDA@Ni(OH) 2 was introduced into poly(lactic acid) (PLA) matrix to explore flame retardancy, thermal stability, and crystalline property of the composites. As confirmed by X-ray diffraction (XRD), Fourier-transform infrared spectrometer (FTIR), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA), the MoS 2 nanosheets were dually modified with PDA and Ni(OH) 2 without destroying the original structures. The thermal degradation of PLA with MoS 2 -PDA@Ni(OH) 2 generated a notably higher yield of char. Moreover, the crystallization rate of composites is higher than neat PLA. The cone calorimeter test revealed that the introduction of 3% MoS 2 -PDA@Ni(OH) 2 resulted in lower Peak Heat Release Rate (PHRR) (decreased by 21.7%). Thus, the research provided an innovative functionalization method for manufacturing PLA composites with high performances.
研究领域:
材料科学
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高分子化学
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DOI
高影响因子
Nanoscale
·
2025
·
IF 5.1
Wei Zhao,Yuxiang Yang,Yanbin Li,Yimin Liu,Yuezhou Wei,Xinpeng Wang,Deqian Zeng
The advancement of efficient photocatalysts is essential for tackling global energy and environmental issues. In this work, a unique sheet-on-sheet Cd(OH)2/CdS photocatalyst was synthesized via a facile solution strategy, demonstrating significantly improved photocatalytic performance for H2 generation and Cr(VI) reduction. The optimal 5% Cd(OH)2/CdS obtained an impressive H2 production rate of 3475 μmol·g-1·h-1 under visible light, marking a 6.3 times increase compared to CdS. Additionally, the kinetics of Cr(VI) reduction were markedly accelerated, with a rate constant of 0.2803 min-1, representing a 5.7 times improvement over pure CdS. Moreover, the 2D/2D Cd(OH)2/CdS photocatalyst exhibited exceptional stability, maintaining high photocatalytic activity over multiple reaction cycles. Experimental findings and DFT calculations revealed the charge transfer mechanism between CdS nanosheets and Cd(OH)2 cocatalyst. This work provides insights into designing high-performance CdS-based nanophotocatalysts for water splitting and environmental remediation.
研究领域:
材料科学
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环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Chemistry
·
2018
·
IF 4.155
Li Yinong,Tian Chen,Liu Weizhen,Xu Si,Xu Yunyun,Cui Rongxin,Lin Zhang
Nano-Mg(OH)2 is attracting great attention as adsorbent for pre-concentration and recovery of rare earth elements (REEs) from low-concentration solution, due to its superior removal efficiency for REEs and environmental friendliness. However, the nanoparticles also cause some severe problems during application, including aggregation, blockage in fixed-bed column, as well as the difficulties in separation and reuse. Herein, in order to avoid the mentioned problems, a carbon cloth (CC) supported nano-Mg(OH)2 (nano-Mg(OH)2@CC) was synthesized by electrodeposition. The X-ray diffraction and scanning electron microscopy analysis demonstrated that the interlaced nano-sheet of Mg(OH)2 grew firmly and uniformly on the surface of carbon cloth fibers. Batch adsorption experiments of Eu(III) indicated that the nano-Mg(OH)2@CC composite maintained the excellent adsorption performance of nano-Mg(OH)2 toward Eu(III). After adsorption, the Eu containing composite was calcined under nitrogen atmosphere. The content of Eu2O3 in the calcined material was as high as 99.66%. Fixed-bed column experiments indicated that no blockage for Mg(OH)2@CC composite was observed during the treatment, while the complete blockage of occurred to nano-Mg(OH)2 at an effluent volume of 240 mL. Moreover, the removal efficiency of Mg(OH)2@CC was still higher than 90% until 4,200 mL of effluent volume. This work provides a promising method for feasible application of nanoadsorbents in fixed-bed process to recycle low-concentration REEs from wastewater.
研究领域:
环境科学
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2025
·
IF 3.3
Hao Yin,Bingxian Wu,Xueyang Leng,Hong Gao,Jing Yao
Electrolytic water-splitting has the advantages of high efficiency, environmental friendliness, and sustainability. It is becoming a leading approach for producing hydrogen. In order to improve the efficiency of water-splitting, a bifunctional electrocatalyst with high performance is needed. Herein, we present a novel approach to construct a bifunctional electrocatalyst for overall water-splitting by compounding Ni(OH)2 and CoP. This combination induced charge optimization, thereby leading to surface reconstruction. The nanocomposite displayed outstanding catalytic performance, benefiting from its more reactive surface area, improved conductivity and enhanced electrocatalytic activity. The resulting Ni(OH)2/CoP electrocatalyst exhibited excellent catalytic performance, with low overpotentials of 266 mV at 50 mA cm−2 for the OER and 71 mV at −10 mA cm−2 for the HER, and required only 1.54 V to reach 10 mA cm−2 in an overall water-splitting device, overtaking most of the recently reported Co- and Ni-based catalysts. This innovative strategy offers new directions for the design of efficient electrocatalysts.
研究领域:
材料科学
·
电化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF NANOPARTICLE RESEARCH
·
2025
·Vol. 27
·期 2
·1-11
·
IF 2.6
Zhang Enlei,Chen Jiaojiao,Xu Rui,Song Xiaowen,Zhang Bengui,Wang Guosheng
In this work, the different shaped CoSn(OH) 6 nanocrystallines were prepared by hydrothermal method. The morphology, microstructure, and composition of the prepared nanocrystallines were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and other methods. The optical properties of CoSn(OH) 6 nanocrystallines with different morphologies were analyzed using UV–vis DRS. With the reduction of 4-nitrophenol as a model reaction, the photocatalytic performance of CoSn(OH) 6 nanocrystallines with the different morphologies was investigated. The results show that the CoSn(OH) 6 nanorings significantly improved the photocatalytic reduction 4-nitrophenol performance. The conversion rate of 4-nitrophenol reached 94% within 6 min. Finally, a potential mechanism for the photocatalytic process of CoSn(OH) 6 nanorings is discussed.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Qiaomei Sun,Pengjun Duan,Wenqing Zhang,Yuxuan Xie,Xiang Ni,Jianzhong Zheng
Photocatalytic technology is an attractive option for environmental remediation because of its green and sustainable nature. However, the inefficient utilization of solar energy and powder morphology currently impede its practical application. Here, we designed a floatable photocatalyst by anchoring 0D Cu2(OH)PO4 (CHP) nanoparticles on 2D graphene to construct 0D/2D CHP/reduced graphene oxide (rGO) aerogels. The CHP/rGO aerogels have interconnected mesopores that provide a large surface area, promoting particle dispersion and increasing the number of active sites. Moreover, the optical response of the CHP/rGO aerogel has been significantly expanded to cover the full spectrum of the solar light. Notably, the 20%CHP/rGO aerogel displayed a high degradation rate (k = 0.178 min–1) taking methylene blue (MB) as a model pollutant under light irradiation (λ > 420 nm). The enhanced photocatalytic activity is ascribed to the rapid electron transfer in the CHP/rGO heterostructures, as supported by the DFT theoretical calculations. Our research highlights the utilization of full spectrum responsive photocatalysts for the elimination of organic pollutants from wastewater under solar light irradiation, as well as the potential for catalyst recovery using floatable aerogels to meet industrial requirements.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Chunyu Zhang,Guang Yang,Xueqing Gao,Zhiyun Li,Yifan Li,Siyuan Wang,Junyong Wang,Xunhua Zhao,Kai Zhang,Yu Kang,Yi Cui
Surface OH species on electrocatalysts play a pivotal role in affecting the hydrogen evolution reaction (HER). Herein, we highlight the critical role of surface OH basicity in regulating interfacial water structure and OH desorption behavior. By annealing Ru/Ni(OH) 2 at various temperatures, we successfully tailored the electronic state of surface OH species, with the catalyst annealed at 300 °C (Ru-Ni-300) exhibiting superior HER performance, achieving a current density of 100 mA/cm 2 at an exceptionally low overpotential of 71 mV. X-ray photoelectron spectroscopy demonstrates that the electron-rich surface OH species on Ru-Ni-300 exhibit strong Lewis basicity. The enhanced OH basicity facilitates the formation of hydrogen-bond networks with interfacial water through electron donation, which in turn promotes OH desorption kinetics. Quasi-in-situ XPS and density functional theory calculations further elucidated that the increased electron density on surface OH species reduces OH adsorption energy, thus accelerating HER performance. These findings unveil a direct correlation between surface OH basicity and HER efficiency, offering new insights into tailoring surface environments for advanced water-splitting electrocatalysts.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES COMMUNICATIONS
·
2024
·
IF 6.5
Qixiong Zhang,Yafei Hou,Qi Yang,Jing Cuan,Weiping Li
High energy storage in multilayer composites is pivotal for the progress of advanced electronic and power device systems, however, the uneven distribution of electric fields caused by significant dielectric contrast between adjacent layers limits its potential gaining in energy density. Through incorporating transition layers into multilayer composites to mitigate interlayer dielectric contrast, herein, four-layer matrix gradient-structured composites ( x vol% PMMA/(100- x ) vol% P(VDF-HFP) have been designed and fabricated. The results demonstrate that the transition layers play a crucial role in hindering the breakdown process and homogenizing the electric field distribution. In addition, the linear PMMA as well as horizontally oriented nanoplates are also beneficial in enhancing their energy storage performances. The gradient-structured composite ultimately achieved an energy density of 24.3 J/cm³ and a charge-discharge efficiency of 86.6 % at 676.8 MV/m, significantly surpassing that of traditional multilayer nanocomposites. The strategies proposed here may represent a universal approach to further enhance energy storage performances of multilayer composites.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 50
·505502
·
IF 2.9
Zhihua Zhao,Hepeng Zhang,Pu Chen,Guixin Jin,Lan Wu
Two-dimensional material (2D material) MXene has great application potential in gas sensors because of its excellent controllable performance and vast specific surface area. In this study, we used a straightforward in-situ electrostatic self-assembly technique to create Fe(OH)3/Ti3C2Tx nanocomposites, which were then used to fabricate gas sensors for ammonia detection at room temperature (25 °C). Several characterization methods were performed aimed at determining the surface appearance and construction of the nanocomposites, and the sensing characteristics and mechanism were also systematically examined. The findings demonstrate the effective incorporation of amorphous Fe(OH)3 nanoparticles on the surface of Ti3C2Tx. Additionally the nanocomposites of Fe(OH)3/Ti3C2Tx have considerably higher specific surface area than pure Ti3C2Tx, hence offering more active NH3 adsorption sites. The response of the sensor to 100 ppm NH3 was 48.6% at room temperature, which was 9.3 times more higher than that of pure Ti3C2Tx. The sensors also have the advantages of long-term stability (33 d), low NH3 detection limit (500 ppb), and rapid recovery time (85 s) and response times (78 s). It is anticipated that this work will be helpful for developing the new generation of wearable ammonia sensors at room temperature.
研究领域:
材料科学
·
传感器技术
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产品关联
DOI
PubMed
高影响因子
ChemSusChem
·
2024
·
IF 7.5
Yue Qin,Qingli Xu,Rong Zhao,Qingfa Wang
Graphical Hybrid NiS/Ni(OH) x catalyst containing abundant heterointerfaces and appropriate oxygen vacancies show excellent oxygen evolution reaction (OER) activity and stability. The oxygen vacancies can be easily regenerated to recover the OER performance after the stability test. A mechanism of oxygen vacancies transformation and regeneration based on the Ni-S-5 catalyst is proposed. Developing low-cost and highly efficient electrocatalysts toward oxygen evolution reaction (OER) is of vital significance for electrochemical water splitting. Herein, we fabricate a heterostructure NiS/Ni(OH) x electrocatalyst (Ni-S-n) with regenerative oxygen vacancies via electro-deposition on nickel foam (NF) followed by a facile NaBH 4 reduction. The resulting Ni-S-5 catalyst with appropriate amount of oxygen vacancies (O vs ) exhibits extraordinary activity for alkaline OER with overpotential of 142 mV and 248 mV to reach the current density of 10 mA cm −2 and 100 mA cm −2 , respectively. This catalyst also shows remarkable durability with 40 h. After the stability test, the excellent OER performance is well recovered by regenerating the surface oxygen vacancies (O vs ) significantly with additional NaBH 4 reduction. The Ni-S-5 catalyst still displays good activity even after repeating it three times (180 h). The surface oxygen vacancies act as vital active sites for OER. A mechanism of O vs species transformation and regeneration based on the Ni-S-5 catalyst is proposed, which provides a new direction for exploring ultrastable and efficient OER electrocatalysts with renewable active species.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）