IONICS
·
2022
·Vol. 28
·期 8
·3945-3956
·
IF 2.961
Wei Xuedong,Chai Yudan,Chen Weifeng,Liu Nan,Qiao Shuangyan
In this paper, an amorphous composite electrocatalyst of Co(OH) 2 -Ni(OH) x S y was prepared by a simple and rapid electrochemical deposition method on nickel foam (NF). The electrochemical performance for oxygen evolution reaction (OER) was tested in 1 M KOH solution. The overpotential of Co(OH) 2 -Ni(OH) x S y (Co:Ni = 9:1) electrode was 423 mV at 50 mA cm −2 . The potential of the Co(OH) 2 -Ni(OH) x S y (Co:Ni = 9:1) sample remained essentially unchanged from the initial potential of 1.651 V after 12 h of stability test. In this catalyst, the strong synergistic effect between cobalt and nickel ions, the greatly increased amorphous defect sites and oxygen vacancies, and the abundant electrochemical specific surface area together lead to the increased electrocatalytic activity and high electrocatalyst stability. This amorphous CoNi-based composite electrocatalyst prepared by simple electrodeposition has certain significance for the preparation of hydrogen energy.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Denglei Zhu,Yufan Zheng,Yi Xiong,Chaojun Cui,Fengzhang Ren,Yong Liu
Aqueous rechargeable zinc-ion batteries (AZIBs) have gained extensive attentions due to their high volumetric capacity, low cost, and intrinsic safety. Nonetheless, their zinc metal anodes have been suffered from many issues, such as uncontrollable dendrite growth and undesired side reactions, which eventually degrade the capacity and cycle life. Herein, a thin sulfur-doped zinc oxide artificial interface film (≈200 nm) was in situ grown on zinc foil (ZnO:S@Zn) by a simple chemical bath deposition method. The density functional theory calculations revealed that the electronic conductivity of zinc oxide could be improved after sulfur doping. Characterization analyses and electrochemical measurements showed that this unique film could enhance the electrical conductivity of zinc anode inhibit the side reaction and induce Zn 2+ uniform deposition. As a result, the ZnO:S@Zn symmetric cell was stably cycled for 1700 h at 0.5 mA cm −2 with a stable voltage hysteresis of ~20 mV, and the full-cell pairing with MnO 2 cathode exhibited an excellent reversible capacity of 297.46 mAh g −1 after 300 cycles. This work offers a simple and effective way to fabricate a stable Zn metal anode for high performance AZIBs.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xuyan Zhang,Pengfei Cheng,Weiming Song,Shiya Rong,Jieming Huang,Dong Wang,Peter Schaaf,Guofu Zhou,Zhang Zhang,Junming Liu
Solar energy is a promising renewable energy with the potential for the sustainable development of the world. Efficient photo-thermal conversion is essential for harvesting and conversion of solar energy, therefore, the main challenge is the development of efficient and low-cost photothermal conversion materials. Carbon framework can be considered as a candidate but somehow its application potential can be still constrained due to the limited absorption of near-infrared (NIR) light. Herein, we propose a general strategy for preparing two-dimensional (2D) transition metal dichalcogenides nanosheets and three-dimensional (3D) carbon framework composites (2D/3D ReS 2 @C) as a photothermal material, which has an excellent broadband light absorption performance (in the wavelength range from 200 to 2500 nm). A small thermoelectric (TE) module with an area of 4 × 4 cm 2 is integrated with annealed ReS 2 @C as a light absorber for the investigation of photo-thermoelectric conversion. The open-circuit voltage of the assembled device increases clearly under solar illumination and reaches the maximum value of 136.3 mV, which is ∼ five times larger than that without the absorber. In addition, 20 TE modules coated with ReS 2 @C absorber layers are connected in series, which can produce a maximum open-circuit voltage of 2.12 V (∼66.25 V/m 2 ) to light up a red light-emitting diode (LED) under natural sunlight. Moreover, the annealed ReS 2 @C powder demonstrates a rapid and strong photothermal response under NIR light (wavelength ＞800 nm), which indicates a great application potential in photothermal imaging and photothermal cancer therapy.
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2022
·Vol. 46
·期 21
·10339-10346
·
IF 3.925
Cong Huang,Xuehua Zhang,Dongyang Li,Mengyue Wang,Qiang Wu
Synthesizing highly efficient photocatalysts for photoreduction of CO2 into solar fuel is of great significance for solving the energy shortage and environmental pollution. Here, a series of CdS photocatalysts are synthesized via the solvothermal method by tuning the Cd–S precursor molar ratio of Cd(NO3)2 to CS(NH2)2, and used as photocatalysts for CO2 reduction into solar fuel. The crystal structure, morphology, optical properties, charge separation, and photocatalytic performance of the CdS photocatalysts are greatly influenced by the Cd–S precursor molar ratio. After changing the molar ratio of Cd(NO3)2 to CS(NH2)2, the morphology of the synthesized CdS changes from nanorods to self-assembled nanoflowers and floccules with a high proportion of (002) crystal planes. As the molar ratio of Cd(NO3)2 to CS(NH2)2 increases, the BET specific surface area of the synthesized CdS catalysts increases obviously, the surface sulfur vacancies gradually increase, and the photo-generated charge separation is also enhanced. CdS2-1 synthesized using a molar ratio of Cd(NO3)2 to CS(NH2)2 = 2 : 1 shows the highest performance for photocatalytic reduction of CO2 to CO (146.3 μmol g−1) and H2 (582 μmol g−1) in 6 h under visible light irradiation, which is 11.2 and 4.4 times those over CdS1-3 synthesized using a molar ratio of Cd(NO3)2 to CS(NH2)2 = 1 : 3, respectively. This research demonstrates that a slight change of the precursor molar ratio in the synthesis of a catalyst can cause big changes in the photochemical properties and the corresponding photocatalytic performance.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Chaorui Xue,Qian Zhang,Yang Shen,Shengliang Hu,Qing Chang,Huiqi Wang,Ning Li,Jinlong Yang
Utilizing inexhaustible solar energy to realize water purification is a green and sustainable solution to water pollution. Herein, a laser thermal method was adopted to prepare reduced graphene oxide/CuS nanocomposites (rGO/CuS) for solar-driven water purification. By laser treatment of aqueous NaOH solution containing graphene oxide, CuCl 2 , and thiourea, rGO was formed, and CuS was anchored on the rGO surface at an elevated temperature. The prepared rGO/CuS showed high photothermal conversion ability, and the water evaporation enthalpy was reduced for rGO/CuS loaded melamine sponge (rGO/CuS-MS). A notable high solar-driven water evaporation rate of 2.09 kg•m −2 •h −1 was achieved for rGO/CuS-MS under 1.0 kW•m −2 solar irradiation. Integrating with the adsorption ability, the rGO/CuS-MS demonstrated efficient removal capacity of rhodamine B (RhB), volatile m-dinitrobenzene (m-NB), and Ni 2+ in water under solar irradiation. The results indicated that the water evaporation could enhance the RhB, m-NB, and Ni 2+ adsorption capacity of rGO/CuS-MS. Both the unevaporated and distilled water can be efficiently purified by rGO/CuS-MS under solar irradiation. Also, increasing solar flux showed contribution to higher RhB removal ratio for the accelerated water evaporation. This study could contribute to preparing rGO-based nanocomposites for water resources remediation applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF SEPARATION SCIENCE
·
2022
·Vol. 45
·期 11
·1866-1873
·
IF 3.614
Gaowa Jin,Lijie Liu,Yuanliu Yang,Yan Zhang,Ping Zhao,Dongping Yu,Yongzheng Zhou,Zhimou Guo,Hui Wang,Xinmiao Liang
The availability of various high-purity unsaturated fatty acids has a wide range of needs due to their different activities. The nonlinear preparative chromatography behavior and principle for purification of palmitoleic acid with octadecyl bonded stationary phases were studied. The peak broadening and the concentration distribution of the target compounds were used to compare different C18 stationary phases. In preparative liquid chromatography, the C18 stationary phases with low, medium, and high bonding density showed different peak broadening and concentration distribution results. Medium bonding density C18 was suitable for the purification of ethyl palmitoleic acid. The forward broadening was much greater than the backward broadening on medium bonding density C18 column. And the highest concentration distribution of impurities and the main peak was not crossed in this column. Due to the low content of crude ethyl palmitoleic acid sample, a two-step purified method yields an oily product with purity of 96.57% in the GC method. This method would be universal and extensible for constructing purification method for other unsaturated fatty acids.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Lei Guo,Mengyue Zhu,Zhongyi He,Renhui Zhang,Savaş Kaya,Yuanhua Lin,Viswanathan S. Saji
N and S codoped carbon dots having good water solubility have been successfully made by a novel hydrothermal method and characterized by FTIR, XPS, and TEM. The as-synthesized CDs were carbon particles rich in polar functional groups less than 10 nm in size. Electrochemical measurements, gravimetry, and surface analysis methods were utilized to examine the inhibition characteristics and adsorption mechanism of CDs on the carbon steel in acid pickling solutions. Electrochemical measurements verified that the CDs displayed adequate protection with high inhibition efficiency of 97.8%. The long-term weight-loss experiments up to 72 h further confirmed the excellent corrosion inhibition at room temperature and 313 K. The results presented are helpful for the formulation of more effective acid pickling corrosion inhibitors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 6
·3114-3124
·
IF 2.047
Yan Xiangyang,Chen Yong,Yang Mengru,Shi Yonghong,Gao Tian,Li Yuangang
Abstract Efficient and long-term photoelectrochemical (PEC) hydrogen liberation from hydrazine hydrate was achieved using CdS nanorod arrays (CdS NRs) as the photoelectrode. Under light irradiation, the CdS photoelectrode exhibited high efficiency and stability for the anodic oxidation of N 2 H 4 ·H 2 O with high selectivity for hydrogen production at the counter cathode. The yield and Faradic efficiencies (FE) of hydrogen from N 2 H 4 ·H 2 O solution under mild conditions were determined to be 658 μmol/cm 2 and 90%, respectively, after 5 h of operation. The photocurrent density of the CdS electrode in electrolyte with N 2 H 4 ·H 2 O reached 7.6 mA/cm 2 at 1.23 V versus RHE, five times higher than that in N 2 H 4 ·H 2 O free electrolyte. And the persistence of CdS electrodes in electrolytes with N 2 H 4 ·H 2 O was more than 100 h, while in N 2 H 4 ·H 2 O free electrolytes, it was less than 100 s. An obvious cathodic shift of the photocurrent onset potential of about 300 mV was also observed. Furthermore, the kinetics of PEC oxidation of N 2 H 4 ·H 2 O were further tested. In addition, it is expected that this work may provide a strategy to stabilize other unstable photoelectrodes for a wide range of applications and supply a way to produce hydrogen by photoelectrochemical decomposition of N 2 H 4 ·H 2 O. Graphical Abstract
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Abdou Karim Darboe,Xiaosi Qi,Xiu Gong,Qiong Peng,Yanli Chen,Ren Xie,Wei Zhong,Guanglei Wu
Interfacial polarization and geometrical morphology play a significant role in the attenuation of electromagnetic (EM) wave. Herein, the two-dimensional (2D)/2D heterojunction with flower-like geometrical morphology is proposed and produced, which may simultaneously provide a large contact area for achieving strong interfacial polarization and activates more sites for the possible multiple EM wave reflection and scattering. By adopting a simple two-step hydrothermal method, MoSe 2 /MoS 2 and MoS 2 /MoSe 2 inner and outer-interchangeable heterojunctions consisting of 2D MoSe 2 and MoS 2 nanosheets with flower-like geometrical morphology were successfully synthesized. The results revealed that the hydrothermal temperatures significantly impacted the flower-like geometrical morphology and MoS 2 content. By optimizing the microstructures, the designed MoSe 2 /MoS 2 and MoS 2 /MoSe 2 heterojunctions presented enhanced comprehensive EM wave absorption properties (EMWAPs), possessing strong absorption capability, wide absorption bandwidth and thin matching thicknesses. Generally, this work demonstrates that the optimized EMWAPs of designed heterojunctions mainly originate from the special interfaces and morphology configuration, which also paves a new way for the designing and synthesis of transition metal dichalcogenides-based heterojunction as a novel and desirable candidate for high-performance microwave absorbers.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Applied Materials Today
·
2022
·
IF 8.663
Enhui Ma,Guolong Sun,Fanglin Duan,Hongguang Wang,Hong Wang
A direct Z-scheme heterojunction coupling hierarchical nanosheet MoS 2 nanotubes with CuInS 2 quantum dots was successfully prepared to fabricate MoS 2 NTs/CuInS 2 QDs photoanodes for enhanced photoelectrocatalytic (PEC) activity. The MoS 2 NTs with stacked nanosheets and tubular structure have high surface area and abundant basal edges, which can create more active reaction sites. Simultaneously, the continuous and broad photo-absorption range of MoS 2 NTs improved the utilization of visible-light and increased the separation efficiency of photo-induced electron-hole pairs. The integration of MoS 2 NTs with CuInS 2 QDs onto Cu foil yielded direct Z-scheme heterojunction photoanode. The formation of Z-scheme heterojunction inhibited the recombination of photo-induced electron-hole pairs and produced more active electrons and holes to facilitate the generation of highly active species. Under visible light illumination, the prepared MoS 2 NTs/CuInS 2 QDs photoanode showed superior PEC activity by applying a suitable bias voltage. In PEC process, the generated holes, hydroxyl radicals and superoxide radicals with strong oxidative were employed to achieve highly efficient degradation of tetracycline. The prepared photoanode exhibited high stability, reusability, and broad application potential in PEC degradation of organic pollutants. Moreover, a possible mechanism of the transfer pathway of photo-induced electron-hole pairs on the MoS 2 NTs/CuInS 2 QDs photoanode was proposed based on a direct Z-scheme heterojunction.
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2022
·Vol. 28
·期 6
·2865-2873
·
IF 2.961
Zhi Guowei,Wang Wei,Yang Lu,Sun Luanhong,Hao Lingyun,Tang Zhengxia,Lin Qing,Yao Hanyu
Due to high theoretical capacity and low cost of CuSbS 2 , it is deemed to be one of the most promising anode materials for lithium-ion batteries (LIBs). In this paper, the effects of different Cu/Sb ratios on the properties of composites prepared by one-step microwave irradiation method were studied. The results showed the increasement of Cu element could improve conductivity of anode material and the structure stability to reduce the capacity loss. And increasing composition of Cu element also could improve the initial columbic efficiency. The best initial discharge capacity was as high as 3001.9 mA hg −1 , and even the specific capacity still kept 215.8 mA hg −1 after 120 cycles, which was got at 1:3 of Cu/Sb ratio. This work provides a method for the Cu/Sb ratio effect of the performance for the LIBs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Mei Wu,Xiaohui Liang,Yu Zheng,Congyi Qian,Dunhui Wang
The core@shell structures and compositions hold greatly potential for microwave absorption. Herein, the Fe 3 O 4 @1T/2H-MoS 2 nanocomposites with core@shell structures were successfully fabricated through a simple hydrothermal process. The impedance matching was significantly promoted by introducing magnetic Fe 3 O 4 nanoparticles and designing the flower-like 1 T/2 H-MoS 2 with core@shell structures. It can be seen that the regulation of Fe 3 O 4 contents play an important role in electromagnetic parameters and microwave absorption performances of the Fe 3 O 4 @1T/2H-MoS 2 nanocomposites with core@shell structures. The Fe 3 O 4 @1T/2H-MoS 2 nanocomposites with core@shell structures with corresponding thickness of 2.67 mm display the minimum reflection loss (RL min ) value of − 56.22 dB at 10.36 GHz (in X band), and the maximum absorption bandwidth (AB max ) extend up to 4.76 GHz with thickness of only 1.89 mm. This result is of great significance for improving microwave absorbing performance, and the nanocomposites can be regarded as candidates for high-quality absorbing materials.
✓ 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）