ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Zhixiong Yang,Bo Hu,Xiaotian Wang,Dmitry Selishchev,Gaoke Zhang
The development of high-performance photocatalysts is crucial for enabling efficient CO2 conversion in photocatalytic systems. Here, we developed a novel heterojunction (N-BON) composed of Ni-doped Bi4O5Br2 and NiCo2O4 for CO2 photoreduction with the help of simulated sunlight. The optimized 21N-BON composite exhibited the highest activity, producing 18.66 μmol·g–1·h–1 of CO with a selectivity of 95.7%, which represents a remarkable 2.15-fold and 4.75-fold increase in CO yield compared to the Bi4O5Br2/NiCo2O4 heterojunction and Ni-doped Bi4O5Br2, respectively. Photoelectrochemical testing, photoluminescence analysis, and theoretical calculations demonstrated that the enhanced performance of the 21N-BON composite is attributed to improved photogenerated carrier separation, driven by the synergistic effects of Ni-doping-induced spin polarization and the built-in electric field from heterojunction construction. Additionally, theoretical calculations and in situ DRIFTS analyses was used to clarify the CO2 reaction mechanisms on the photocatalyst surface, showing that Ni doping improved CO2 adsorption and promoted the formation of key reaction intermediates. This study offers important guidance for developing advanced photocatalysts for solar-driven CO2 reduction, contributing to sustainable energy solutions.
研究领域:
材料科学
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环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2023
·
IF 7.4
Yue Han,Changdi Wang,Ruiyang Zhao,Jishu Han,Lei Wang
In order to alleviate environmental pollution and energy crisis caused by the excessive use of fossil fuels, photocatalytic water splitting to produce hydrogen as an alternative fuel has attracted widespread attention. The construction of heterojunction photocatalyst is considered to be one of the effective ways to enhance the photocatalytic hydrogen production efficiency. In this study, Ni-doped CdSe was modified on the surface of hollow ZnSnO 3 double-shell nanocubes. The obtained Cd 0.9 Ni 0.1 Se/ZnSnO 3 possessed high photocatalytic activity under visible light irradiation. The photocatalytic hydrogen production rate could reach to 6458.0 μmol/g/h. The successful construction of hollow Cd 0.9 Ni 0.1 Se/ZnSnO 3 double-shell type-I heterojunction increased visible light absorption, shortened the charge transport distance, and inhibited the recombination of electron-hole pairs, thus enhancing the photocatalytic hydrogen production performance of Cd 0.9 Ni 0.1 Se/ZnSnO 3 . It provided the idea for promoting the design of solar to chemical energy conversion and the effective guidance for constructing a high-efficient and stable photocatalyst.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Ying Liu,Yu-Xiang Yu,Wei-De Zhang
Ni-doped Fe 2 O 3 thin films which were active photoanodes for water splitting were prepared by electrodeposition. By adjusting Ni molar ratios (Ni/(Ni + Fe)) in the electrolyte, Fe 2 O 3 thin films with various compositions of Ni could be tuned. The films were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, atomic absorption spectrophotometer, and UV–vis spectroscopy. The highest photo-response obtained from Fe 2 O 3 doped with 2.08 mol.% Ni is 1.5 mA/cm 2 at 0.65 V vs. Ag/AgCl in 1.0 M NaOH solution. The high performance is attributed to the improvement of charge transport properties and retardation of the charge recombination resulting from the dopants in the lattice. The optical absorption spectra of the films reveal that the bandgaps of the Ni-doped Fe 2 O 3 films are approximately 1.9–2.2 eV for all samples regardless of their doping level. XPS shows that the concentration of Ni is much higher on the surface than that in bulk.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Juanjuan Feng,Yu Tian,Kunlin Li,Fei Wang,Kai Li,Ping Ning
Toxic H 2 S limits the high-value utilization of high-concentration CO in yellow phosphorus tail gas. High-performance adsorbents play a significant role in the purification of yellow phosphorus tail gas and the recovery of CO. In this study, manganese-based adsorbents doped with other metals (Cu, Co, Ni, Ce, and Fe) were synthesized and tested for H 2 S removal. The results demonstrate that doping α-MnO 2 with metals significantly enhances its desulfurization performance. Notably, the 20 % Ni/Mn adsorbent achieves the best performance, exhibiting an adsorption duration of approximately 50 h under test conditions and H 2 S capacity up to 854.35 mg/g. Mechanism studies show that the performance improvement is mainly attributed to the doping of Ni, which disrupts the growth of the α-MnO 2 rod-like structure, promoting the formation of fine particles and exposing more crystal interfaces. This is conducive to the migration and release of active lattice oxygen species on the adsorbent, thereby enhancing the adsorption-oxidation performance of the adsorbent for H 2 S. Moreover, Ni significantly promotes the formation of high-valent Mn, enhancing the adsorbent’s oxidation capability and facilitating the decomposition of H 2 S. This study proposes an innovative synthetic strategy for constructing adsorbents with high H 2 S adsorption performance under anaerobic and dry conditions.
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
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Shuya Rui,Na Liu,Lingwei Ren,Yang Liu,Zian Liu,Binghui Wu,Hua Pan,Zhiping Ye
Traditional Mn-Ce catalysts for selective catalytic reduction (SCR) of NO with CO (CO-SCR) in iron and steel flue gases are often hindered by competitive adsorption of NO and CO, which compromises catalytic efficiency. In this study, we present a Ni-doped Mn-Ce catalyst that overcomes these challenges, achieving 96 % NO conversion, 98 % N 2 selectivity, and 44 % CO conversion at 175 °C. Comprehensive characterization of the catalyst reveals that Ni doping significantly enhances Mn-Ce interactions, boosting oxygen vacancy density and promoting efficient redox cycling between Mn 3 + /Mn 4+ and Ce 3+ /Ce 4+ . Diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) confirms preferential NO adsorption at oxygen vacancy sites, minimizing CO-NO competition and stabilizing the Langmuir-Hinshelwood mechanism, where both gases co-adsorb and react at oxygen-rich vacancies. Mechanistic insights suggest that Ni facilitates electron transfer, weakening the N–O bond in NO and accelerating its dissociation, resulting in faster NO reduction. This study establishes Ni doping as a promising strategy for improving the low-temperature performance of Mn-Ce-based CO-SCR catalysts, paving the way for more efficient catalytic systems.
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yingjun Qiao,Xianyang Dai,Bing Zhao,Zhiqiang Qian,Zhijian Wu,Zhong Liu
It is highly appealing to use titanium-based adsorbents (like H 2 TiO 3 (HTO)) that have a high capacity and selectivity to directly extract Li + from an aqueous solution. However, HTO still faces the problems of low actual adsorption capacity and dissolution of Ti 4+ , and the application of powder adsorbents is limited by poor fluidity and poor recyclability. In this work, a multi-scale modification strategy was adopted. At the atomic-scale, we prepared Ni-doped HTO-Ni-2 % powder which exhibited higher adsorption capacity (33.27 mg/g) and lower dissolution rate of Ti 4+ (2.2 %) compared to undoped HTO (29.73 mg/g and 2.63 %). Computational studies showed that Ni doping replaced Li in the (Li) layer, resulting in more stable Ni O bonds and enhanced electronic transition ability. At the micro-scale, we have achieved successful granulation of HTO-Ni-2 % using ethylene vinyl alcohol (EVOH) as a binder for the first time. Owing to the increased hydrophilicity by EVOH, the spherical adsorbents exhibited impressive performance, achieving adsorption equilibrium in a short time while maintaining a considerable adsorption capacity (24 h, 10.2 mg/g), and having lower Ti 4+ dissolution. These results have significant implications for developing efficient adsorbents for lithium extraction.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2024
·
IF 2.6
Jipeng Wu,Nianlong Zhang,Hengyuan Zhang,Feifei Chen,Li Sun,Xiufeng Cheng,Xian Zhao
Borate crystal Zn4B6O13 (ZBO) exhibits excellent optical properties and exceptional thermal stability. In this study, large-sized ZBO and Ni-doped ZBO (Ni:ZBO) single crystals were grown using the Kyropoulos method, and their structural, thermal, electro-elastic, and optical properties were comprehensively investigated. Ni2+ doping substituted Zn2+ without altering the cubic crystal structure, slightly increasing the thermal expansion coefficient to 5.72 ± 0.08 × 10− 6 K−1 in the temperature range of 25–670 °C while maintaining a remarkably low value compared to most laser crystals. Ni:ZBO displayed enhanced piezoelectric performance (d14 = 1.49 pC N−1 at room temperature), ∼21% higher than ZBO, and retained a high degree of temperature stability. Optical analysis showed high transmittance from 241 nm to the mid-infrared range and characteristic absorption peaks. Additionally, strong short-wavelength emission at 440 nm was observed in the Ni:ZBO crystal, indicating its potential as a high-quality gain medium for blue-violet laser generation. These findings underscore the promise of Ni:ZBO as a material suitable for high-temperature piezoelectric and laser crystal applications.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2023
·Vol. 34
·期 40
·405201
·
IF 3.5
Zhuohua Chen,Xiaoli Jin,Qing Lan,Xin Li,Qunzeng Huang,Wenmin Liu,Yuwei Guo,Haiquan Xie,Liqun Ye
Photocatalytic CO2 reduction is considered to be an appealing way of alleviating environmental pollution and energy shortages simultaneously under mild condition. However, the activity is greatly limited by the poor separation of the photogenerated carriers. Ion doping is a feasible strategy to facilitate the charge transfer. In this work, Ni-doped Bi4O5I2 photocatalyst is successfully fabricated using a one-pot hydrothermal method. A few doping levels appear in the energy band of Bi4O5I2 after Ni doping, which are used as springboards for electrons transition, thus promoting photoexcited electrons and holes separation. As a consequence, a remarkably enhanced yield of CO and CH4 (6.2 and 1.9 μmol g−1 h−1) is obtained over the optimized Bi4O5I2-Ni15, which is approximately 2.1 and 3.8 times superior to pure Bi4O5I2, respectively. This work may serve as a model for the subsequent research of Bi-based photocatalysts to implement high-performance CO2 photoreduction.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
DOI
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2013
·Vol. 40
·期 1
·385-397
·
IF 0.88
Wang Yong,Chen Guihua,Zhang Fumin,Li Liquan
Ni-incorporated SBA-15 magnetic composites were two-stage hydrothermal synthesized from initial strong acidic media through a pH-adjusting method. The structure, morphology, surface area and pore size distribution of the samples were systematically characterized by using XRD, FT-IR, SEM, TEM and N 2 physical adsorption techniques. It was found that, when pH was adjusted to 7, the obtained sample still could exhibit hexagonal mesostructure, very similar to that of the pristine SBA-15 except for a slightly reduced long-range ordering and surface area. However, an increase in the unit cell and wall thickness of the samples suggested the more Ni species were incorporated into the framework of SBA-15. A further increase in pH to 9 produced deterioration of long-range ordering of the sample, possibly resulting from the blocking of some mesopores. Thus, the pH-adjusting method played an important role on the structure of Ni–SBA-15 composites. Measurements taken with increasing applied field revealed the samples having superparamagnetic behaviors. Furthermore, the saturation magnetization values were increased with the more Ni species transforming into magnetic nanoparticles by the increasing pH.
研究领域:
材料科学
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化学工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Jun Tang,Jinzhao Huang,Sixuan Zhang,Zehui Liu,Xiaolong Deng
Metal-phase MoS2 (1T-MoS2) is considered a promising candidate as a catalyst for the hydrogen evolution reaction (HER). However, the instability of 1T-MoS2 limits its electrocatalytic activity. Herein, we first synthesized 1T-MoS2 with excellent HER catalytic performance by a simple one-pot hydrothermal strategy of introducing the d-electron-rich transition metal atom Ni into MoS2. A bimetallic monatomic catalyst (Pt@1T-MoS2–Ni) was also prepared by modifying 1T-MoS2–Ni with Pt single atoms (Pt SAs). Experiments show that the electron transfer caused by Ni doping leads to the 1T phase transition, and the modification of Pt SAs further improves the electrical conductivity. These two factors synergistically modulate the electronic composition of MoS2 and increase the number of reactive sites. In consequence, the Pt@1T-MoS2–Ni catalyst exhibits significantly enhanced HER activity, achieving an overpotential as low as 76 mV at 10 mA/cm2 with the corresponding Tafel slope of only 46 mV/dec. Moreover, the current attenuation is negligible within 12 h, surpassing the performance of MoS2. This study offers ideas for improving the efficiency and stability of 1T-MoS2 catalyst designs.
研究领域:
材料科学
·
电催化
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 112
·111539-111548
·
IF 3.289
Hui Deng,Shi-Xi Zhao,Xia Wu,Lei Wei,Yu-Feng Deng,Ce-Wen Nan
The chief drawback of Li2MnSiO4 cathode materials is structural instability deriving from the transformation of [MnO4] tetrahedra to [MnO6] octahedra during oxidation from Mn(II) to Mn(III) and the Jahn–Teller effect especially from Mn(III) to Mn(IV). Based on the theory that Ni2+ could keep the [NiO4] ligand unchanged and stable during oxidation/reduction, [NiO4] tetrahedra may behave as a regional structural framework to support the total crystal lattice and alleviate structural distortion partially. In this paper we synthesize nano-Li2Mn1−xNixSiO4/C samples with a small amount of Ni as the dopant via a hydrothermal route. Firstly, we discuss the existential state of Ni through XPS spectra, and demonstrate that both Ni2+ and metallic Ni coexist, especially Ni2+ could improve structural stability. The influence of Ni doping on morphology, structural stability, and electrochemical performance is discussed through Raman spectroscopy and electrochemical tests below. It is confirmed that there exists an optimal Ni content under which the optimal performance is displayed. In our work, the optimum Ni content is 5.0%, and the maximal discharge capacity achieved is 235 mA h g−1 for the 5.0% Ni doped sample in the first cycle.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 82
·78257-78263
·
IF 3.289
Jiabao Cui,Jingjing Jiang,Linqi Shi,Fei Zhao,Dejun Wang,Yanhong Lin,Tengfeng Xie
Ni-Doped ZnO nanofibers have been synthesized by a simple, facile electrospinning method. The structure and morphology of the products were characterized by SEM, HRTEM and XRD analysis. X-ray photoelectron spectroscopy (XPS) confirmed that Ni2+ ions exist in the ZnO nanofiber structures. The photoelectric gas-sensing tests reveal that the response was significantly enhanced by Ni doping, and the 0.7% molar ratio Ni-doped sample (NZ0.7) exhibits the highest response of 532.7% to 100 ppm HCHO at room temperature. Photoluminescence (PL) measurements show that there are more donors in Ni-doped ZnO nanofibers by the introduction of Ni2+ ions. Furthermore, the surface photovoltage (SPV) and transient photovoltage (TPV) tests indicated that Ni doping can effectively enhance the donor density, which could facilitate charge separation and transport in the semiconductor, and promote photogenerated holes to move toward the irradiated surface of the samples. These results contribute to the photocatalytic oxidation of HCHO so as to achieve higher gas-sensing properties for Ni-doped ZnO nanofibers.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
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