INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Xianglei Cao,Liugen Zhang,Changyan Guo,Tingxiang Chen,Chao Feng,Zechang Liu,Ying Qi,Wei Wang,Jide Wang
In this paper, Ni x Cd y S composite photocatalysts were synthesized by using Ni-doped Cd–Co PBA as the precursor, which retains the advantages of PBA such as porous structure , large specific surface and highly dispersed metal active sites. The photocatalytic hydrogen production performance over Ni x Cd y S is three times higher than that of pure CdS with H 2 yield of 8.45 mmol g −1 h −1 . The catalyst was analyzed by the UV/Vis absorption spectra , photoluminescence spectra, time-resolved photoluminescence spectra, transient photocurrent responses, electrochemical impedance spectra, Mott-Schottky test, etc. A series of characterization results prove that the electron-hole recombination rate, electrochemical resistance and band gap of nickel-doped CdS composites are obviously smaller than CdS, which are important factors to improve the photocatalytic hydrogen production performance. This work may provide some reference value for the fabrication of other functional materials using PBA as precursors.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Dongjie Jia,Xianyu Li,Rongyan Cai,Bochao Ma,Qixian Zhao,Tonglin Chigan,Peipei Yang
Two-dimensional MXene and its composites are among the most attractive electromagnetic wave absorption (EMA) materials due to their unique structure. While previous studies have investigated 2D/2D MoS 2 /Ti 3 C 2 T x heterojunctions for EMA, there is still a need for further adjustments to interface structure to enhance polarized electron density and electron transfer capacity. In this study, Cl-Ti 3 C 2 T x was prepared by Lewis acid molten salt etching of Ti 3 AlC 2 , and S-Ti 3 C 2 T x was prepared by replacing Cl with S. MoS 2 nanosheets were grown on the surface of S-Ti 3 C 2 T x by a simple hydrothermal method, forming a Ti-S-Mo covalent interface. The EMA properties of the composites were further optimized by adjusting the interface oriented polarization and electronic structure through Ni doping. Compared to MoS 2 /TiO 2 /Ti 3 C 2 T x , the electromagnetic wave absorption performance of Ni-MoS 2 /TiO 2 /Ti 3 C 2 T x had been significantly improved. When the Ni doping amount was 0.086 mmol, the minimum reflection loss of Ni-MoS 2 /TiO 2 /Ti 3 C 2 T x could reach −48.04 dB at 8.64 GHz, with an effective absorption bandwidth of 3.28 GHz. This study provides theoretical basis and experimental evidence for the follow-up research of MXene-based composite EMA materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Run Yu,Qianqiao Chen,Wenhua Li,Xinyuan Yu,Qin Zhong
Severe photocorrosion and fast photoexcited charges recombination hinder the application of Cu 2 O in photoelectrochemical (PEC) water splitting. In this work, Ni-doped metal-organic frameworks is firstly applied to improve the performance of electrodeposited Cu 2 O. A decorative layer of Ni-doped Cu 3 (BTC) 2 (Ni-CuBTC) was in-suit constructed on Cu 2 O through solvothermal followed by ion-exchange. Cu 2 O/Ni-CuBTC photocathodes increase absorption edge to ∼800 nm, positive shift flat band position to 0.4 V, and decrease Tafel value to 74 mV/dec. These results confirm the decorative layer can extend light absorption, facilitate photoexcited charge separation and transfer, and enhance HER activity. A photocurrent density of −1.51 mA/cm 2 at 0 V RHE is obtained with the decoration of Ni-CuBTC, which is 3.4 times of pristine Cu 2 O photocathode. Here, the PEC water splitting performance of electrodeposited Cu 2 O has been significantly improved with noble-metal-free decorations, which provides a new idea for solving the defects of Cu 2 O based photocathode.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Pengfei Cheng,Fan Dang,Yinglin Wang,Jianning Gao,Luping Xu,Chen Wang,Li Lv,Xu Li,Bao Zhang,Baijun Liu
In this work, hierarchical flower-like Ni-doped Co 3 O 4 was synthesized via a facile one-step coprecipitation method. In the synthesis process, a series of solvent-dependent experiments were carried out to investigate the effect of ethanol/water ratio (R-E/W) on samples. With the increasing ethanol/water ratio, the doping concentration of Ni 2+ increased and the microstructure evolved from micro-leaves to micro-flowers. Additionally, gas sensors based on prepared materials were fabricated to evaluate their gas sensing properties. The comparative analysis illustrated that the sensor based on 5.3 mol% Ni-doped Co 3 O 4 microflowers (R-E/W = 3/30) presented the highest response (8.34) to 100 ppm n-butanol at low optimum temperature (165 °C), with a response/recovery time of 59/63 s, and it also exhibited excellent anti-humidity properties and long-term stability. The unique hierarchical flower-like microstructure and the optimized parameters (catalytic sites, carrier concentration, ratio of Co 2+ , oxygen component) caused by the doping of Ni were responsible for the improved gas sensing performance. Therefore, this work presented a simple solvent-dependent route to controllably synthesize Ni-doped Co 3 O 4 sensing material, and the excellent gas sensing properties of the sensor based on 5.3 mol% Ni-doped Co 3 O 4 microflowers revealed a great application prospect in detecting n-butanol.
研究领域:
材料科学
·
化学工程
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Tiantian Wang,Yue Shi,Jiawei Fei,Jiawei Zhu,Lumin Song,Caixia Li,Tianrong Zhan,Jianping Lai,Lei Wang
Exploring earth-abundant electrocatalysts to replace platinum/iridium for acidic overall water splitting at high current density is an important challenge towards lowering the cost of green hydrogen production . Herein, we developed a new class of three-dimensional interconnected nanofibers (NFs) composed of ultra-small Ni-doped Co 3 O 4 nanoparticles (Ni-Co 3 O 4 NFs). Benefiting from the unique ultra-small Ni-doped Co 3 O 4 composition and three-dimensional interconnected porous structure, 13.4 % Ni-Co 3 O 4 NFs (Ni doping is 13.4 wt%) exhibits remarkable electrocatalytic performance in acidic media. Specially, in strongly acidic environments, high activity and high stability overall water splitting can be achieved at high current density. As evidenced by the fact that a voltage of 500 mA cm −2 can be achieved at only 1.86 V and operational stability can be maintained at 500 mA cm −2 for 100 h.
研究领域:
材料科学
·
电化学
·
能源材料
·
催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2024
·
IF 11.2
Rui Zhang,Zhiling Chen,Yi Li,Delun Chen,Tao Wang,Bingrong Wang,Qionglin Zhou,Shaowen Cheng,Dan Xu,Xiaohong Wang,Lina Niu,Jinchun Tu,Qiang Wu
The use of zinc oxide (ZnO) photosensitizers (PSs)-mediated photodynamic therapy (PDT) against bacterial wound infections is greatly restricted by diminished photocatalytic efficiency caused by the rapid recombination of photogenerated electrons and holes. In this work, ZnO PSs with a Ni-doped/oxygen vacancy and a protective carbon shell were successfully synthesized by calcinating a Ni-doping zeolitic imidazolate framework-8 precursor. The double-defect structure and the carbon-based substrates significantly promoted the efficiency of photogenerated electron–hole pair separation, meanwhile, the optimal proportion of 3% Ni doping endows it with the best photocatalytic performance as elucidated by photodegradation assays of methylene blue (MB) and density functional theory (DFT) calculations, reinforcing the generation of reactive oxygen species (ROS) by ZnO and showing obvious advantages in antibacterial properties. As the ROS damage that facilitates the photogenerated electron transfer underwent localized accumulation, the PSs disturbed the bacterial membrane integrity and caused bacterial ATP synthesis inhibition, further leading to bacterial lysis and promoting bacterial deaths. Additionally, the PSs showed outstanding efficacy in eradicating bacterial biofilms. Simultaneously, the significantly enhanced PDT antibacterial performance of the PSs in vivo could initiate wound tissue repair and trigger anti-inflammatory reactions by significantly regulating the expression levels of regeneration- and inflammation-related genes or proteins. Furthermore, the PSs consistently exhibited favorable compatibility both in vitro and in vivo . In summary, this study offers evidence of the remarkably efficient and biologically safe performance of Ni-ZnO@C PSs, with antibacterial properties advancing wound healing, both in controlled laboratory environments and living organisms, further underscoring their substantial potential for biomedical applications.
研究领域:
材料科学
·
生物医学工程
·
光疗
·
微生物学
·
伤口愈合
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Changhai Liu,Lei Sun,Linlin Luo,Wenchang Wang,Huilong Dong,Zhidong Chen
Although nonprecious metal catalysts based on earth-abundant 3d transition metals (TMs) are regarded as promising substitutes for a noble metal electrocatalytic hydrogen evolution reaction (HER), their large-scale application is still inhibited by their inadequate activity and durability. Here, a facile method for nonprecious metal catalysts has been developed to prepare molybdenum carbide on nitrogen-doped carbon. By optimizing the Ni doping ratio, the Ni0.5@MoCx/NC exhibits the lowest overpotential for 10 mA cm–2 and superior stability in both acidic and alkaline media for HER application, outperforming most of the reported HER electrocatalysts. In addition, a theoretical simulation has also confirmed the possible mechanism for the synergistic effect with the regulative adsorption energy of hydrogen species with Ni doping and formation of a Mo2C/MoC heterojunction in the Ni0.5@MoCx/NC electrocatalyst. Therefore, this work provides a new avenue for designing two-dimensional nanostructures with an optimized electronic structure for promising TM HER electrocatalysts in a wide pH range.
研究领域:
电化学
·
材料科学
·
催化
·
能源材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2024
·Vol. 17
·期 5
·1200
·
IF 3.1
Wei Tong,Weiqiang Wang,Xiayu Leng,Jianli Song
To enhance the comprehensive performance of solid oxide fuel cells (SOFCs) ferritic stainless steel (FSS) interconnectors, a novel approach involving composite electrodeposition and thermal conversion is proposed to prepare Ni-doped Co-Mn composite spinel protective coatings on FSS surfaces. The process involves the composite electrodeposition of a Ni-doped Co-Mn precursor coating, followed by thermal conversion to obtain the Co-Mn-Ni composite spinel coating. Crofer 22H was used as the substrate and orthogonal experiments were designed to investigate the influences of deposition solution pH, stirring rate, cathode current density, and the element content of Mn and Ni on the surface morphology and properties of the composite coatings, respectively. The characterization of the prepared coatings was conducted through macroscopic and microscopic morphology observations of the component surface, energy dispersive spectroscopy (EDS) analysis, and area specific resistance (ASR) testing, etc. Finally, the optimized composite electrodeposition parameters and the Mn-Ni content ratio in the solution were obtained. Experimental results indicated that the composite spinel coating prepared with the optimized process parameters exhibited excellent adhesion to the substrate, and the diffusion and migration of Cr element has been effectively inhibited. Compared with the substrate, the ASR of the coated components has also been decreased simultaneously, which provided an effective method for the surface modification of SOFC FSS interconnectors.
研究领域:
材料科学
·
电化学
·
能源材料
·
表面工程
✓ 已验证
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Zhaoxi Chen,Gaige Zhang,Huayue Yang,Yun Zhao,An Pei,Peng Wang,Jin Yang,Junxi Zhang,Peilin Sun,Haohang Qin,Junzheng Zhan,Jian Peng,Wei-Hsiang Huang,Linan Zhou,Guangxu Chen
The electrochemical upcycling of polyethylene terephthalate (PET) into high-value products is essential for tackling “white pollution” and enhancing environmental protection. However, significant challenges remain, including the need for low-cost, highly efficient electrocatalysts, and the expensive electrolyte recovery in alkaline systems. This study presents a simple doping method to produce Ni octahedral-doped Co3O4 electrocatalysts (NiCo2O4) from spent LiCoO2 (SLCO), enabling sustainable PET upcycling to formic acid (FA) under economic conditions. The NiCo2O4 catalyst exhibits outstanding electrocatalytic activity for the ethylene glycol oxidation reaction (EGOR), achieving a Faradaic efficiency of 90.5% for FA at a potential of 1.50 V versus RHE. When integrated into an anion-exchange membrane (AEM) reactor, the system displayed an average current density of 173.5 mA/cm2 and a Faradaic efficiency of 84.7% at a cell voltage of 1.70 V. Systematic characterizations and DFT calculations indicate that Ni doping alters the spin-state electron density of Co, increases the localized electrons around Co sites, and significantly reduces the charge transfer resistance (Rct from 44.10 Ω to 10.23 Ω) of EGOR. Moreover, the Co–Ni dual sites enhance EG adsorption compared to individual Co or Ni sites. Finally, along with our electrochemical recovery and separation system (ERSS), a KOH recovery rate of 98.9% is achieved, yielding a return of $440.50 per ton of recycled PET─approximately a 4-fold profit increase compared to the traditional acid–base neutralization process (ABNP). This work describes a closed-loop model that simultaneously addresses battery recycling, plastic pollution reduction, and eco-friendly chemical production.
研究领域:
电化学
·
催化
·
环境科学
·
材料科学
·
化学工程
·
废物回收
·
绿色化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 22
·2112129
·
IF 19.924
Xi Chen,Zhiguo Sun,Bo Cai,Xiaoming Li,Shihua Zhang,Di Fu,Yousheng Zou,Zhiyong Fan,Haibo Zeng
Solution-processed lead halide perovskites (LHPs) hold great promise for low-cost high-performance solar cells and light-emitting devices, but they also suffer from a serious operating instability problem due to the ionic migration and lattice decomposition driven by strong electric fields. Here, considerably suppressed ionic migration and enhanced lattice stability in LHPs with partial substitution of Pb with 3d transition metal (TM: Mn and Ni) are reported. It is experimentally shown that the energy barrier for ionic migration in CsPbBr 3 can be increased fourfold by Mn and Ni substitution, even with a small doping level ( < 4%). However, post-TM Zn and non-TM Bi incorporations are less efficient in suppressing ionic migration. The theoretical results reveal that Ni and Mn ions with partially filled 3d orbitals can passivate the active lone-pair electron of surrounding Pb-Br octahedrons via a coordination effect and reduce the Pb 6s-Br 4p antibonding states, resulting in long-range lattice stabilization and suppressed ionic migration. The Ni incorporation strategy in mixed-halogen CsPbBr 1.5 I 1.5 is further demonstrated, for which the field-driven halogen segregation is significantly mitigated and the associated emission color variation is reduced sixfold. This study paves the way for improving the operating stability in LHP-based optoelectronic and electronic devices.
研究领域:
材料科学
·
光伏技术
·
光电子学
·
固体化学
✓ 已验证
产品关联
DOI
高影响因子
SOLID STATE SCIENCES
·
2022
·
IF 3.752
Yi Wang,Peng Jiang,M.A. Subramanian,Wenbin Cao
Single phase Al 2-2 x Ni x Ti 1+ x O 5 (0 ≤ x ≤ 0.4) solid solutions were successfully synthesized by solid-phase reaction. The color of the compounds varied from yellow ( x = 0.1) to turmeric ( x = 0.4) with increasing nickel content. X-ray photoelectron spectroscopy analysis confirmed that the oxidation state of Ni is +2. The UV–Vis absorption spectrum showed that the color of the sample comes from the d-d transition of Ni 2+ in octahedral coordination. Owing to excellent high temperature stability, the as-prepared oxide powders (10 wt%) were mechanically mixing with Al 2 O 3 by conventional ball milling to prepare colored alumina ceramics. When Al 2 O 3 is in excess, the blue NiAl 2 O 4 impurity phase appeared, contributing to an intense green color of the Al 2 O 3 ceramics composite. The Vickers micro hardness value of green alumina was higher than that of pure white alumina. The as-prepared samples were also dispersed in PMMA and bright yellow polymer composites were obtained, indicating great potential in polymer colorant.
研究领域:
材料科学
·
陶瓷
·
颜料化学
·
高分子科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Mengwei Han,Yuzhu Qian,Xinni Li,Nailiang Wang,Ting Song,Li Liu,Xianyou Wang,Xiongwei Wu,Man-Kay Law,Bei Long
Developing insertion-type anode is key to advancing “rocking chair” zinc-ion batteries, though there are few reported insertion-type anodes. Herein, the Bi 2 O 2 CO 3 is a high-potential anode, with a special layered structure. A one-step hydrothermal method was used to prepare Ni-doped Bi 2 O 2 CO 3 nanosheet , and also a free-standing electrode consisting of Ni-Bi 2 O 2 CO 3 and CNTs was designed. Both cross-linked CNTs conductive networks and Ni doping improve charge transfer. Ex situ tests (XRD, XPS, TEM, etc.) reveal the H + /Zn 2+ co-insertion mechanism of Bi 2 O 2 CO 3 and that Ni doping improves its electrochemical reversibility and structural stability. Therefore, this optimized electrode offers a high specific capacity of 159 mAh g −1 at 100 mA g −1 , a suitable average discharge voltage of ≈0.400 V, and a long-term cycling stability of 2200 cycles at 700 mA g −1 . Besides, the Ni-Bi 2 O 2 CO 3 //MnO 2 “rocking chair” zinc-ion battery (based on the total mass of cathode and anode) delivers a high capacity of ≈100 mAh g −1 at 50.0 mA g −1 . This work provides a reference for designing high-performance anode in zinc-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）