CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xitong Yang,Guowei Liu,Ruifeng Zhou,Zhengzheng Xie,Yamin Cheng,Muhammad Shuaib Khan,Qiuye Li
Catalytic desorption can reduce the activation energy of the reaction and increase the desorption reaction rate, and is one of the most promising technologies to solve energy consumption problems of CO 2 capture technology for organic amine solutions. In order to further reduce desorption energy consumption, we propose a new method of utilizing the photothermal effect of catalysts to increase desorption temperature and accelerate reaction kinetics, and coupling the proton transfer ability of the catalyst itself to form multifunctional catalysis. In this work, we synthesized Ru x Mn 1-x OOH catalyst by introducing Ru atoms at the Mn vacancies on the MnOOH surface, grasping the advantages of the photothermal and proton transfer ability of Ru-dopants. The results showed that the CO 2 desorption capacity increased by 43.1% with adding MnOOH compared to without a catalyst. The Ru-doped catalyst demonstrated a 54.7% increase in CO 2 desorption efficiency, with an additional 98.2% surge attributed to the in-situ photothermal effect generated by the catalyst under light irradiation. Characterization and density functional theory (DFT) calculations revealed that Ru doping significantly enhanced the proton transfer ability while simultaneously weakens the adsorption capacity of monoethanolamine (MEA) on the catalyst surface. Moreover, the stronger photothermal effect introduced by Ru leads to an increase in the surface temperature of the catalyst, which is key to the faster and efficient desorption of CO 2 . This work provides a new approach to improve the proton transfer ability of catalysts and offers a novel photothermal coupled catalytic scheme for CO 2 desorption in organic amine carbon capture technology.
研究领域:
化学工程
·
催化材料
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 93
·90002-90009
·
IF 3.289
Zhifan Zhang,Wenhui Dang,Chengjun Dong,Gang Chen,Yude Wang,Hongtao Guan
Carbon nanotubes (CNTs)@MnOOH core–shell nanocomposites, in which the CNTs core is uniformly coated with a shell of MnOOH nanoflakes, were successfully synthesized using a facile hydrothermal method. The appearance of sodium dodecyl benzene sulfonate (SDBS) plays a key role in forming the unique CNTs@MnOOH core–shell. A high dielectric loss tangent value was observed for the samples with/without SDBS. Significantly, the CNTs@MnOOH core–shell nanocomposites exhibit an electromagnetic shielding effectiveness of 13–15 dB in the frequency range of 8–18 GHz, which can be attributed to the improved absorption loss, resulting from the increased electrical conductivity, and the improved impedance matching of the core–shell structure. Moreover, the increasing interfaces between the MnOOH and CNTs favor the electromagnetic attenuation performance. Our findings strongly confirm that the CNTs@MnOOH core–shell nanocomposites can be considered as a potential candidate for electromagnetic applications.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 70
·44523-44530
·
IF 3.108
Lichen Xia,Lujun Pan,Muhammad Asif,Dongmei Zhang,Muhammad Usman,Shuaitao Yang,Nan Zhou,Yunping Hu,Yuezhen Bin
Ternary composites as electrode materials have attracted extensive attention due to their excellent electrochemical performance in energy-storage technologies as compared to single or binary composites. Herein, we demonstrated a facile two-step method to construct a new hierarchical nanocomposite by combing buckypaper (BP) with γ-MnOOH nanorods and polyaniline. BP is used as a conductive substrate for the synthesis of free-standing hierarchical electrodes. The structural characterizations revealed the growth of a hierarchical porous structure of the ternary electrode. The synthesized polyaniline@γ-MnOOH–BP ternary composite electrode shows a maximum specific capacitance of 567.5 F g−1 at a current density of 0.5 A g−1 and a relatively high areal capacitance of 301.2 mF cm−2 at a current density of 0.27 mA cm−2. This intriguing result is ascribed to the good combination of BP, γ-MnOOH, and PANI. We believe that this ternary composite electrode has potential in portable, environmentally friendly, and wearable applications for next generation energy-storage devices.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xitong Yang,Ruifeng Zhou,Guowei Liu,Sajjad Hussain,Qiuye Li
Catalytic regeneration has become one of the most promising technologies to solve the high energy consumption problem of CO 2 capture in organic amine solutions. As the most mainstream type of catalyst, the instability of acidic catalysts in alkaline solutions attracts increasing attention from researchers. Herein, we proposed a composite catalyst of MnOOH loaded HZSM-5 to weaken the adsorption of alkaline substances and improve the catalytic stability of the catalytic material. The optimized catalytic effect is obtained when the mass ratio of MnOOH is 20% The CO 2 desorption efficiency is increased by 68.2%, and the energy consumption is reduced by 31.8% when the dosage of the catalyst is only dosage of 0.2 wt% amine solution. Through materials characterization and DFT calculations, it was found that the surface O and hydroxyl groups on MnOOH are the key factors for proton cycling, and HZSM-5 has an important impact on improving proton transfer rate. This work provides a valuable approach to solving the stability problem of acidic catalysts.
研究领域:
化学工程
·
催化材料科学
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Bo Peng,Fengxiang Du,Simin Dou,Yuying Yang,Min Zhou,Shengguo Zhao,Yanjun Fang
A ratiometric fluorescent probe was developed for the first time to quantitatively analyze propyl gallate (PG). The probe utilizes the fluorescence enhancement of Schiff base formed by PG and polyethyleneimine (PEI) catalyzed by MnOOH nanosheets, and the quenching effect of PG on quantum dots modified by β-cyclodextrin. Upon excitation at 350 nm, the fluorescence intensity of the dual-emission probe increased at 470 nm and decreased at 595 nm. The probe was successfully employed for the determination of PG in food samples in the concentration range of 0.1–35 μg/mL. The limit of detection (LOD) and the limit of quantitation (LOQ) were determined to be 0.023 μg/mL and 0.077 μg/mL, respectively. The recovery rate was found to range from 88.5 % to 103 % across three levels of spiked experiments. In conclusion, the present study provides a highly selective and sensitive analytical method for the detection of PG in real samples.
研究领域:
分析化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Lijuan Chen,Yaoyong Dong,Mengwei Han,Ting Song,Xuejun Zheng,Wenyuan He,Bei Long,Xiongwei Wu,Yong Pei,Xianyou Wang
MnOOH is regarded as a product of manganese-based materials after H + insertion. There is rare study on the Zn 2+ /H + storage capability of MnOOH. Herein, MnOOH nanofibers are prepared through a one-step hydrothermal method and developed as a promising cathode. The introduction of S doping changes the crystal structure of MnOOH and is conducive to its electronic/ionic transport and structural stability, proven by density functional theory calculations and various characterizations. The reduced Zn 2+ diffusion barrier of S-doped MnOOH leads to its increased Zn 2+ storage capability in the test of rate capability, especially at large current density. The Zn 2+ /H + insertion-type mechanism of MnOOH is revealed by ex situ XRD, Raman, XPS, and SEM tests. Therefore, this optimized material delivers a high reversible capacity of 178 mAh g −1 at 0.1 A g −1 , a good rate capability of 50 mAh g −1 at 3.0 A g −1 , and a long cyclic life with 108 mAh g −1 at 0.5 A g −1 over 500 cycles. Moreover, the electrode still shows satisfactory rate capability and cyclic life even at the high mass loadings of 10 and 15 mg cm −2 . This work proves the Zn 2+ /H + storage capability of MnOOH and its potential as a high-performance cathode in aqueous zinc ion battery.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2019
·
IF 6.393
Lunjie Huang,Da-Wen Sun,Hongbin Pu,Qingyi Wei,Linpin Luo,Jianlong Wang
Despite the tremendous achievements of existing sensing techniques, sensitive and portable sensing of organophosphorus pesticides (OPs) in a non-polluting manner remains a challenging issue. This work proposed a facile colorimetric paper sensor using γ-MnOOH nanowires (NWs) as a degradable nanozyme and 3,3′,5,5′-tetramethylbenzidine (TMB) as a chromogenic indicator for rapid and sensitive screening of OPs and acetylcholinesterase (AChE) activity. The sensing mechanism was based on the easy disintegration of the oxidase-like γ-MnOOH NWs into invalid Mn 2+ ions by the selective reaction with thiocholine (TCh) produced by AChE and acetylthiocholine iodide (ATCh), triggering a remarkable activity loss of MnOOH nanozymes towards TMB oxidation. The concentration of OPs, as an AChE inhibitor, was measured by the changes in absorbance at 652 nm or blue color of oxTMB products. Such detection platform in solution state achieved relatively low limits of detection (LODs) for AChE activity (0.007 mU mL −1 ), and for two typical OPs, i.e., omethoate (0.35 ng mL −1 ) and dichlorvos (0.14 ng mL −1 ), respectively. Further, the portable assembly of such AChE-nanozyme tandem reaction on test paper performed well, reaching LODs of 0.1 mU mL −1 for AChE, 10 ng mL −1 for omethoate, and 3 ng mL −1 for dichlorvos, respectively. Meanwhile, this sensing system showed great selectivity and anti-interfering capacity in both solution and solid states, and worked well in real serum and vegetable samples. The abovementioned results, along with evidence of its good ecological sustainability, demonstrated the superiority of this well-performing platform for application in the food, environmental, and medical fields.
研究领域:
分析化学
·
环境科学
·
食品科学
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Ling Yu,Hua Li,Wei Huang,Haili Yu,Yi He
Imaging the catalytic activity at the single-particle level can greatly promote the screening and rational design of highly efficient nanozymes, but conventional techniques are based on ensemble analysis. Here, we present a new absorption microscopy for in situ visualizing oxidase-mimicking activity of single MnOOH nanotubes. The particle with a size more than 700 nm roughly equally scatters all wavelengths of visible light via Mie scattering, and the scattering light is collected by dark-field optical microscopy. When the particles absorb a single color of the scattering light, each individual nanoparticle shows its complementary color, enabling a form of absorption microscopy that we name Mie scattering-based absorption microscopy. We find that MnOOH nanotubes can catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) to generate polyTMB nanowires at their tips. There are multiple active sites on the surface of the individual nanotube, and the nanozyme activity shows a large heterogeneity as well as pH-dependent characteristic.
研究领域:
纳米技术
·
催化
·
显微技术
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Chemistry Frontiers
·
2024
·
IF 6
Yuru Zhou,Jing Hu,Yinan Liu,Wenyu Fan,Panpan Tao,Rui Yang,Haitao Huang,Xun Cao,Haijin Li,Siwei Li
Designing noble metal-free electrocatalysts remains a challenge for the oxygen evolution reaction (OER) in alkaline solutions. In this study, we present a facile electrodeposition approach coupled with an in situ anodic oxidation method to synthesize NiOOH–MnS/NF on nickel foam (NF), successfully creating NiOOH–MnOOH/NF heterojunctions to boost OER performance under alkaline conditions. The heterojunction's synergistic effect significantly modulates the adsorption energy of the rate-determining step (RDS), thereby enhancing the intrinsic electrocatalytic activity of the NiOOH–MnOOH/NF electrocatalyst. Furthermore, the introduction of SO42− leads to a variable degree of electron loss in both Mn and Ni, reducing adsorption strength of the OER intermediates and thus optimizing reaction kinetics. The as-prepared NiOOH–MnOOH/NF electrocatalyst demonstrates exceptional OER performance in 1.0 M KOH, achieving a current density of 100 mA cm−2 with a Tafel slope of 52.3 mV dec−1 and a minimal overpotential of 391 mV. Utilizing NiOOH–MnOOH/NF as a bifunctional electrode for overall water splitting (OWS), the system operates at a low potential of 1.66 V at 10 mA cm−2, showcasing its excellent durability. This work offers novel insights and promising prospects for the advancement and practical application of non-precious metal electrocatalysts in the field of electrocatalytic water splitting.
研究领域:
电化学
·
材料科学
·
催化
·
能量转换与存储
✓ 已验证
产品关联
DOI
高影响因子
CORROSION SCIENCE
·
2021
·
IF 7.205
Dongdong Zhang,Feng Peng,Jiajun Qiu,Ji Tan,Xianming Zhang,Shuhan Chen,Shi Qian,Xuanyong Liu
Herein, a novel smart chemical strategy for regulating the corrosion reaction to reinforce the plasma electrolytic oxidation (PEO) coating on magnesium by amorphous MnOOH is proposed. The MnOOH film could provide PEO coating with both physical shielding and chemical active healing abilities. During corrosion process, MnOOH spontaneously reacts with the corrosion-produced Mg 2+ and OH – to form layered double hydroxides , resulting in high improvement of the long-term anti-corrosion of PEO coating. Moreover, the PEO/MnOOH coating presented a certain self-healing ability for scratches, and could be used for repairing corrosion defects on further coated films.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
·
2015
·
IF 3.615
Yang Li,Lin-Dong Liu,Lu Liu,Ying Liu,Hong-Wei Zhang,Xu Han
In this study, three trivalent Mn (oxyhydr)oxides, bixbyite (α-Mn 2 O 3 ), hausmannite (Mn 3 O 4 ) and manganite (γ-MnOOH) were synthesized and used as persulfate (PS) activators in phenol oxidation. Of these three Mn (oxyhydr)oxides, only γ-MnOOH shows a good catalytic activity in PS activation with more than 80% phenol oxidized within 360 min in the full pH range. With increasing concentrations of PS and γ-MnOOH, phenol removal efficiency increased. TOC results also suggest that phenol oxidation at pH 11 is more complete than those at pH 7 and 3. We further confirm that mechanism involved in phenol oxidation is pH dependent in γ-MnOOH/PS system. Although SO 4 − and OH were both found under acidic and alkaline conditions, they did not contribute equally under different pHs. At pH 11, SO 4 − and OH generated from PS activation efficiently oxidize phenol. At pH 3, the strong oxidation activity of γ-MnOOH and an oxidative intermediate formed between S 2 O 8 2− and γ-MnOOH primarily contribute to phenol oxidation. At pH 7, an oxidative intermediate formed between γ-MnOOH and S 2 O 8 2− is the predominant oxidative species in phenol oxidation.
研究领域:
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Shenglan Zhao,Meiling Zhou,Jiarui Ren,Yaping Zhang,Yufeng He,Rongmin Wang
Antibiotics are commonly present in the natural environment and pose a threat to human health due to their resistance to degradation or recycling. Therefore, finding an effective catalyst for antibiotic treatment remains a challenge. In this study, a fibrous inorganic nanocomposite , MnOOH-hydroxyapatite nanowires (MnO-HApNWs), was successfully synthesized by in-situ solvothermal method, and applied for removal of antibiotics. Tetracycline (TC), a widely used antibiotic, could be rapidly degraded with removal rates being 87.6% within 5 min, and 93.6% within 60 min, respectively. Based on nano-structure characterization, influence of key parameters, measurement of active species and analysis of degradation intermediates, the mechanism and degradation pathways of catalyze degradation was investigated. The high specific surface area and pore size of MnO-HApNWs facilitated the adsorption of TC onto its surface followed by catalytic degradation through the generation of reactive oxygen species . The scavenger experiments revealed that active radicals, such as •OH and O 2 • － , played a crucial role in the degradation of TC. Furthermore, MnO-HApNWs demonstrated cyclic stability and universality with over 85.1% efficiency even after 8 cycles of recycling. In summary, the prepared novel fibrous inorganic nanocomposites materials (MnO-HApNWs) exhibit exceptional catalytic performance with promising prospects for application in wastewater pollutant removal .
✓ 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）