ChemSusChem
·
2023
·Vol. 16
·期 9
·e202300154
·
IF 8.4
Yuheng Lin,Deshuai Yang,Chaoyu Meng,Chunying Si,Quanxing Zhang,Guixiang Zeng,Wei Jiang
Graphical Replace the atom : Ni 2+ -doped MgO catalyst is developed via a combined theoretical and experimental approach, which exhibits excellent performance toward the glycolysis of polyethylene terephthalate (PET) with a bis(hydroxyethyl) terephthalate yield of 93.7 %. Ni 2+ doping is found critical to the generation of O − and deprotonated ethylene glycol which break the PET chain via nucleophilic attack. Developing efficient and eco-friendly catalysts for selective degradation of waste polyethylene terephthalate (PET) is critical to the circular economy of plastics. Herein, we report the first monatomic oxygen anion (O − )-rich MgO−Ni catalyst based on a combined theoretical and experimental approach, which achieves a bis(hydroxyethyl) terephthalate yield of 93.7 % with no heavy metal residues detected. DFT calculations and electron paramagnetic resonance characterization indicate that Ni 2+ doping not only reduces the formation energy of oxygen vacancies, but also enhances local electron density to facilitate the conversion of adsorbed oxygen into O − . O − plays a crucial role in the deprotonation of ethylene glycol (EG) to EG − (exothermic by −0.6 eV with an activation barrier of 0.4 eV), which is proved effective to break the PET chain via nucleophilic attack on carbonyl carbon. This work reveals the potential of alkaline earth metal-based catalysts in efficient PET glycolysis.
研究领域:
材料科学
·
催化
·
环境科学
·
化学工程
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DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiaohua Jing,Jianying Huang,Jiani Shi,Zihan Zhao,Jingbo Hao,Xiaoning Tang
In this study, five novel ionic liquids (ILs), namely [N888][Cyanex 272], [N888][P507], [N888][Cl], [N888][NO3], and [N888]2[SO4], were synthesized through an organic acid–base reaction, followed by separation using rotary evaporation. Their structures were confirmed by 1H and 13C NMR spectroscopy, showing full consistency with theoretical predictions and no impurity peaks. Under identical extraction conditions, the ILs exhibited the following separation efficiency order for Co2+ from Ni2+: [N888]2[SO4]>[N888][Cl] > [N888][P507] > [N888][Cyanex 272]>[N888] [NO3]. Density functional theory (DFT) calculations revealed that these differences in separation performance arose from variations in the ionic radii of the IL anions. With a simple single-stage extraction under optimized conditions, [N888]2[SO4] enabled near-complete separation of Co2+ from Ni2+, achieving an extraction efficiency of 99.5 ± 2.14% and a separation factor approaching + ∞. Thermodynamic analysis confirmed that the extraction process was endothermic and nonspontaneous. The Co2+ -loaded IL-based extraction phase was efficiently stripped using diluted sulfuric acid, with a stripping efficiency of 99.3 ± 0.57%. Using sodium hydroxide as a precipitant, the solid powder of Co(OH)2 was obtained from the Co2+-containing aqueous phase. Co(OH)2 was characterized qualitatively and quantitatively by XRD and ICP-OES, and its morphology was also analyzed using SEM. The recycled IL-based extraction phase, after activation with dilute sulfuric acid, was analyzed via FT-IR spectroscopy. This regenerated IL-based extraction phase was reused for the separation of Co2+ from Ni2+, showing no degradation in performance after three cycles. Based on these findings, a process flowchart was designed for the efficient preparation of Co(OH)2 from minerals or secondary resources using the [N888]2[SO4]-based extraction phase.
研究领域:
化学工程
·
材料科学
·
环境科学
·
无机化学
·
分离技术
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Menglong Liu,Naizhong Jiang,Hai Huang,Jidong Lin,Feng Huang,Yongping Zheng,Daqin Chen
Room temperature phase instability of cubic CsPbI 3 perovskite nanocrystals is one of the notorious limitations for practical applications in optoelectronic fields. Herein, the incorporation of Ni 2+ ions into CsPbI 3 lattice was successfully achieved by a modified hot-injection method using nickel acetate as doping precursor. The as-prepared Ni 2+ (3.3 mol%): CsPbI 3 nanocrystals exhibited an improved, near-unity (95%~100%) photoluminescence quantum yield owing to the enhanced radiative decay rate and the decreased non-radiative decay rate. Additionally, Ni-doping was demonstrated to stabilize CsPbI 3 lattice and the Ni 2+ : CsPbI 3 film and colloidal solution can retain their red luminescence up to 15 days and 7 months in atmosphere, respectively. First-principle calculations verified that the significantly improved optical performance and stability of Ni 2+ : CsPbI 3 nanocrystals arose primarily from the increased formation energy due to the successful doping of Ni 2+ in CsPbI 3 . Benefiting from such an effective doping strategy, the as-prepared Ni 2+ -doped CsPbI 3 perovskite nanocrystals can function well as efficient red-light emitter toward the fabrication of high-performance perovskite LED with a peak external quantum efficiency of ~7%.
研究领域:
材料科学
·
光电技术
·
纳米技术
·
光子学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2021
·
IF 7.312
Haoyu Yue,Zhijie Shang,Pan Xu,Dongyue Feng,Xinxue Li
A novel EDTA functionalized chitooligosaccharide/sodium alginate/Ca 2+ physical double network hydrogel (ECSDNH) was prepared by using of high-salinity oilfield produced water. The formation and structure of ECSDNH were characterized by FT-IR and SEM. Various factors, including EDTA functionalized chitooligosaccharide content, pH of solution, initial concentration of heavy metal ions, temperature and contact time, were thoroughly investigated to explore their effect on adsorption capacity of ECSDNH. The obtained results showed that ECSDNH had higher adsorption capacity for Zn 2+ , Ni 2+ and Mn 2+ . The maximum adsorption capacities of Zn 2+ , Ni 2+ and Mn 2+ were 160.19 mg/g, 72.67 mg/g and 52.43 mg/g at 298 K, respectively. The pseudo-second-order kinetic model and Langmuir isotherm model fit the experimental data fairly well. The thermodynamic parameters of the adsorption, Δ H ° , Δ S ° , and Δ G ° , were also calculated. In addition, the ECSDNH still had higher removal efficiency for three metal ions after three adsorption-regeneration cycles, indicating its potential application for removing heavy metal ions from wastewater.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Huan Zhao,Zhuo Xu,Yuhang Che,Yu Han,Shaomin Yang,Chenyang Duan,Jian Cui,Songyuan Dai,Zhike Liu,Shengzhong (Frank) Liu
All-inorganic CsPbI 2 Br is a promising candidate to produce the optimized balance between efficiency and stability. Unfortunately, the CsPbI 2 Br perovskite films prepared by solution methods often show numerous defects on the grain surfaces and a tendency for phase transition. In this work, we discovered that the proper amount of NiI 2 additive enables Ni 2+ doping in the perovskite interstitial lattice, while additional Ni 2+ ions serve as passivation agents on the grain surfaces; in particular, a profiled distribution appears from the film bulk to both the upper and lower surfaces. The special Ni 2+ distribution results in an optimized TiO 2 surface for perovskite growth, better perovskite film quality, superior charge extraction capability, and effective suppression of interfacial recombination. As a result, the CsPbI 2 Br perovskite solar cell (PSC) efficiency is increased to 15.88%, among the highest for its type. Also, the special Ni 2+ distribution endows the PSC with improved moisture tolerance. This work provides a promising strategy to overcome the surface/bulk instability issues common in PSCs.
研究领域:
材料科学
·
能源科学
·
光伏技术
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Tianze Wen,Xue Jiang,Jiawei Zheng,Shenao Wang,Jun Luo,Jinju Zheng,Bingsuo Zou,Jialong Zhao,Zhentao Du
Growth of qualified single-crystalline perovskite nanorods. High-purity, high-crystallinity Ni 2+ -doped CsPbI 3 nanorods are successfully prepared by introducing ion doping. • The substantially enhanced stability. The introduction of Ni 2+ doping improved the stability of the nanorods, allowing the Ni 2+ -doped CsPbI 3 nanorods to maintain their structural and optical integrity for more than 5 weeks under ambient conditions. • The overall excellent performance of the as-constructed PDs. The introduction of Ni 2+ doping reduced the defect concentration and carrier recombination rate. The detectivity of the photodetectors is comparable to the best-reported values among both undoped and ion-doped one-dimensional CsPbI 3 nanomaterial-based photodetectors (The Ni 2+ -doped CsPbI 3 nanorod PD has a responsivity of 1.08 × 10 3 A/W, a detectivity of 1.11 × 10 14 Jones, and an external quantum efficiency of 3.58 × 10 5 %, respectively). CsPbI 3 nanomaterials have attracted significant attention in optoelectronic devices due to their high carrier mobility and long diffusion length. Among them, one-dimensional (1D) CsPbI 3 nanomaterials offer more direct charge-carrier transport channels, making them ideal candidates for constructing high-performance micro/nanoscale photodetectors (PDs). However, CsPbI 3 nanomaterials still exhibit a high defect density within the crystal structure, which exacerbates carrier recombination. In this work, we successfully prepared Ni 2+ -doped CsPbI 3 nanorods with high crystallinity via a hot-injection method by partially substituting Ni 2+ for Pb 2+ . The as-prepared nanorods remain stable under ambient conditions for over five weeks. Ni 2+ doping reduces the defect-state density and electron–hole recombination rate of the CsPbI 3 nanorods. Meanwhile, the induced electronically active states facilitate photoexcitation, thereby collectively enhancing the photoelectric performance of the CsPbI 3 nanorods. The ultraviolet (UV) PD assembled based on Ni 2+ -doped CsPbI 3 nanorods exhibits excellent overall performance, featuring a detectivity of up to 1.11 × 10 14 Jones, which is comparable to the reported detectivity values of high-performance 1D CsPbI 3 -based photodetectors measured under different experimental conditions. This work provides some guidance for the development of high-performance UV optoelectric devices. Download: Download high-res image (194KB) Download: Download full-size image High-quality Ni 2+ -doped CsPbI 3 nanorods are successfully synthesized. The UV photodetector exhibits outstanding photoelectric performance, achieving a responsivity of 1.08 × 10 3 A/W, a detectivity of 1.11 × 10 14 Jones, and an external quantum efficiency of 3.58 × 10 5 %.
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DOI
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2023
·Vol. 60
·期 5
·450-459
·
IF 1
Ya Xu,Zheng Ji,Yansong Zhang,Mengdie Sha,Chuanrun Li,Huchuan Wang
Chitosan and hydroxyapatite are commonly used materials for adsorption. In this work, chitosan was modified by polyethylene glycol and maleic anhydride. Subsequently, a hydroxyapatite-chitosan composite was synthesised by precipitation. The composite was characterised and analysed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray photoelectron spectroscopy (XPS). Adsorption experiments were used to investigate the effects of external factors such as different pH values, adsorbent dosage, adsorption time and initial nickel ion concentration on the adsorption capacity of Ni 2+ and to discuss the mechanism of Ni 2+ removal by composites. The results show that the hydroxyapatite-chitosan composite has significant adsorption of Ni 2+ . The adsorption capacity of the hydroxyapatite-chitosan composite for Ni 2+ reaches 63.8 mg g −1 . The adsorption process is consistent with the pseudo-second-order kinetic model and the Langmuir isothermal model.
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
高影响因子
International Journal of Electrochemical Science
·
2023
·Vol. 13
·期 2
·1754-1772
·
IF 1.5
Zheng Chang,Zhuanzhuan Gao
In this paper, we concentrated on the simplest way to synthesize Nickel ion doped poly (neutral red) (Ni 2+ @PNR) hybrid nanocomposites (abbreviated as Ni 2+ @PNR HN) through a reverse microemulsion method. Because the MWCNTs/Nafion composite film was negatively charged, the positively charged Ni 2+ @PNR HN can be adsorbed by electrostatic interactions onto the surface of MWCNTs/Nafion modified electrode. The hybrid nanocomposite exhibited excellent electrocatalytic activity for glucose oxidation due to three-in-one synergistic effects, namely, the special copolymerization structures of Ni 2+ @PNR HN as an active catalytic center; the amount of doping of Ni2+ can be tuned by the attachment of NR with MWCNTs/Nafion, resulting in the hybrid nanocomposites containing much more Ni 2+ and possessing a significant signal amplification effect toward the glucose oxidation reaction; the effective immobilization of Ni 2+ at the modified electrode surface was achieved by the non-covalent interaction of hybrid nanocomposites and MWCNTs/Nafion support materials. Accordingly, the Ni 2+ @PNR HN/MWCNTs/Nafion modified electrode displayed an enhanced electrocatalytic activity to glucose oxidation in 0.1 mol·L -1 NaOH solution, owning the advantages of higher sensitivity, lower detection limit, wide linear range, and good stability and selectivity for constructing a novel enzyme-free glucose electrochemical sensor.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Rui Dang,Xiang-Rong Ma,Yun-Peng Zhao,Menjiao Ren,Wei Guo,Yu-Hong Kang,Yong Gao,Shiqing Bi,Wenwen Gao,Hua-Rui Hao,Rui Bai,Yu-Fei Wang,LongYan,Liguo Gao,Zhi-Fang Zhang,Ya-Jun Ma,Xian-Yong Wei
The construction of three-dimensional (3D) Ni 2+ -Al 3+ -LDH / γ-Fe 2 O 3 - Cd 2+ -Ni 2+ -Fe 3+ -layered double hydroxide (LDH) structures (S1–S6) with magnetic properties and different (γ-Fe 2 O 3 - Cd 2+ -Ni 2+ -Fe 3+ -LDH)/(Ni 2+ -Al 3+ -LDH) ratios were successfully prepared. The effects of these ratios in these 3D LDH constructions on physicochemical properties were investigated using XRD, SEM, VSM, UV–vis, and BET analyses. The specific surface area and band gap of these materials decreased with increased ratio, while the saturation magnetization increased. The synergistic combination of saturation magnetization, adsorption characteristics, and band gap of six sample types were evaluated. S3 samples were used in a multistage recycling treatment study of dye wastewater and fluoride ion (F − )-containing wastewater, effectively degrading methyl orange (MO) due to its high photocatalytic activity. After this, the memory effect of the calcined product (S3, 300 °C) significantly enhanced the migration and diffusion of F − , resulting in a F − adsorption capacity of 49.25 mg/g. The recycling properties of this composite material for photocatalytic degradation and adsorption capabilities for F − removal were evaluated, showing a reduction in efficiency of only 1 % and 8.6 % for degradation of MO and F − removal respectively, with no significant loss of efficiency after 10 cycles. Adsorption experiments and subsequent sample characterization showed that the F − adsorption mechanism of S3 involved ion exchange mechanism and sorption sites (interlayer, basal, edges and junction sites). The existence of oxygen vacancies and formation of S-scheme heterojunction between γ-Fe 2 O 3 -Cd 2+ -Ni 2+ -Fe 3+ -LDH and Ni 2+ -Al 3+ -LDH, resulted in the improvement of the photocatalytic activity. The results obtained in this study demonstrated that Ni 2+ -Al 3+ -LDH/γ-Fe 2 O 3 - Cd 2+ -Ni 2+ -Fe 3+ -LDH composites were a promising adsorbent for degradation of MO and F − removal in practical multilevel utilization due to its simple synthesis, low-cost, recyclability, and high removal capability.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
IEEE SENSORS JOURNAL
·
2024
·
IF 4.3
Yadong Hu,Juan Liu,Bin Liu,Donghu Liu,Yingying Hu,Qiang Wu,Xingdao He
In this work, a novel micro/nanofiber sensor array with high sensitivity and good selectivity was demonstrated to simultaneously detect Cr
3+
and Ni
2+
. The high sensitivity was caused by the evanescent field around a microfiber taper waist region. The specific recognition was achieved using an ion-imprinted polymer coating. The experimental results demonstrated a high sensitivity of 0.01086 nm/nM for Cr
3+
, with a linear response in the range of 10-100 nM and a limit of detection (LOD) as low as 0.67174 nM. The sensor array was highly selective and able to distinguish Cr
3+
and Ni
2+
, even at a high concentration of interfering ions (1 μM). Additionally, the practicability of our proposed sensor array for the simultaneous detection of Cr
3+
and Ni
2+
in industrial wastewater samples was evaluated, and it achieved simultaneous ppb level detection for Cr
3+
and Ni
2+
in wastewater. This investigation will facilitate heavy metal ion (HMI) trace detection in the field of drinking water.
研究领域:
环境科学
·
材料科学
·
传感器技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Shuang Cao,Zhuoyi Zhang,Yunshuo Wu,Yuxin Sun,Zhe Li,Yanxia Gao,Haiqiang Wang,Xuanhao Wu,Zhongbiao Wu
Nitrous oxide (N 2 O) is a potent greenhouse gas with high global warming potential. It is urgent to develop active and stabile catalysts for N 2 O direct catalytic decomposition (deN 2 O) in industrial exhaust gas. In this study, a series of Eu-doped NiO catalysts were synthesized by co-precipitation method. The catalyst with an Eu to Ni molar ratio of 0.04 showed the highest deN 2 O ability, reaching 100 % conversion at 400 °C without generating NO x by-products. The catalyst also displayed resilience against O 2 and NO impurity gases, maintaining structural stability and achieving complete transformation of N 2 O at 440 °C. Eu was uniformly dispersed in NiO in the form of Eu 2 O 3 , which not only regulated the particle size and specific surface area of NiO, but also changed the surface chemistry of NiO by inducing more Ni 2+ active sites and more mobile O β species. Eu-doping altered the decomposition mechanism of N 2 O from L-H to E-R mechanism, reducing the energy barrier of O 2 desorption, which was the rate-determining step. During the reaction, Eu 0.04 Ni showed an activation behavior after cyclic use and long-term reaction and reduced T 100 to 320 °C after 14-hr experiment. These findings demonstrate the potential of the catalyst for practical application and provide new routes for the direct decomposition of N 2 O in industrial exhaust gas.
研究领域:
环境科学
·
催化化学
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Liang Shi,Xueying Wang,Rui Peng,Gang Wang,Cheng Liu,Xiaolei Shi,Dainan Zhang,Huaiwu Zhang
Ni 2+ modified MgTa 2 O 6 ceramics with a trirutile phase and space group P4 2 /mnm were obtained. The correlations between crystallographic characteristics and microwave dielectric performance of MgTa 2 O 6 ceramics were systematically studied based on the chemistry bond theory (PVL theory) for the first time. The results indicate that the introduction of Ni 2+ causes a change in polarizability and the Mg–O bond ionicity, which contributes to the variation of dielectric constant. Moreover, the lattice energy, and packing fraction, full width at half maximum of the Raman peak of Ta–O bond, as the quantitative characterization of crystallographic parameters, regulate the dielectric loss of MgTa 2 O 6 ceramics in GHz frequency band. In addition, the study of sintering behavior shows that the densification and micromorphology are the crucial factors affecting the microwave dielectric performance. Typically, Ni 2+ doping on the A-site of MgTa 2 O 6 can effectively promote the Q × f values to 173,000 GHz (at 7.43 GHz), which ensures its applicability in 5G communication technology.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）