JOURNAL OF HAZARDOUS MATERIALS
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2021
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IF 10.588
Tao Huang,Dongping Song,Lulu Zhou,Hui Tao,Aiyin Li,Shu-wen Zhang,Long-fei Liu
The natural ecosystem will continually deteriorate for decades by the leakage of Cs and Sr isotopes. The exploration of the new materials or techniques for the efficient treatment of radioactive wastewater is critically important. In this study, a dielectric barrier discharge (DBD) configuration was constructed to operate the non-thermal plasma (NTP). The NTP was incorporated into the synthesis of polyaluminum chloride (PAC) in two different procedures to intensify the synthesis of PAC (NTP-PAC) and enhance the further removal of Cs and Sr from wastewater. The employment of NTP in two procedures both had significantly changed the physicochemical characteristics of PAC materials, which facilitated the further adsorption application of NTP-PAC on the treatment of Cs + and Sr 2+ . Different molecular, morphological, and adsorption characteristics were confirmed to the NTP-PAC materials. The heterogeneous adsorption of the NTP-PAC can be appropriately fitted by both the pseudo-first-order kinetic model and the Elovich model. Both physisorption and chemisorption reaction mechanisms were ensured for the heterogeneous adsorption of the NTP-PAC material towards Cs + and Sr 2+ , which guaranteed the excellent adsorption performance of NTP-PAC materials compared to PAC. The electron collisions caused by NTP with alum pulp created highly reactive growth precursors and intensified the nucleation and hydrolysis polymerization of PAC. The employment of NTP explicitly broadens the reaction pathways between PAC and cationic contaminants in the aqueous environment, which expands the application area of PAC materials in environmental sustainability.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
FUEL
·
2021
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IF 6.609
Zhonghui Zhang,Changlei Qin,Zhiliang Ou,Hongqiang Xia,Jingyu Ran,Chunfei Wu
It is known that a considerable amount of tar is usually generated in the biomass gasification process, and catalytic steam reforming is an effective method to remove this by-product. The coupling of in-situ CO 2 capture in the process can further shift the forward reforming reaction and produce hydrogen with a high purity. In this work, sorption enhanced steam reforming (SESR) of toluene (as a model compound of biomass tar) was investigated thermodynamically and experimentally using the mechanically mixed Ni/perovskite catalyst and CaO sorbent. It is verified that the appropriate temperature is 650 °C under stoichiometric reaction (S/C = 2), and around 75% average H 2 yield with a maximum H 2 purity over 95% could be obtained. Moreover, the cyclic SESR-regeneration and characterization including XRD, SEM/EDS, TEM and XPS were carried out, and it shows a stable catalytic performance and compatibility of the Ni/perovskite catalyst in the SESR process for high-purity hydrogen production.
研究领域:
化学工程
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能源科学
✓ 已验证
DOI
高影响因子
Catalysts
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2022
·Vol. 12
·期 11
·1334
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IF 4.501
Fujian Lv,Yingchun Miao,Didi Yang,Bing Mao,Zhenfeng Bian,Fengxia Zhu
The adsorption-enhancing TiO2-SBA-15 photocatalyst has been synthesized by an in situ etching displacement method, which possesses unique regular hexagonal pores and large specific surface area. The as-prepared TiO2-SBA-15 can effectively adsorb and increase the concentration of pollutants in the photocatalyst and collision likelihood with the photogenerated radicals, thus improving the efficiency of photocatalytic organic degradation. The structure and morphology have been characterized by N2adsorption isotherms, X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), and scanning electron microscopy (SEM). These characterizations confirm that TiF4alcohol solution prefers to react with the internal surface of SBA-15 because of the Siphon effect. Fourier transform infrared (FTIR) spectra demonstrate that a Ti-O-Si bond formed after the reaction of TiF4with SBA-15, which reveals a wonderful combination of TiO2and SiO2even at low temperatures. Through this function, the nanocomposite TiO2-SBA-15 could obviously improve the efficiency of photocatalytical removal of toluene in the gas phase.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
ChemNanoMat
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2018
·Vol. 4
·期 11
·1133-1139
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IF 3.173
Yiwei Hu,Tao Ding,Kailong Zhang,Biao Li,Baichuan Zhu,Kaibin Tang
Graphical At the interface : Component tunable rutile-anatase TiO 2 /RGO nanostructure shows excellent oxygen evolution reaction performance which is superior to reported TiO 2 -based materials, resulting from the enhancement of adsorption due to the electron transfer mechanism between rutile and anatase, as well as TiO 2 and RGO. As an earth-abundant and environment-friendly material, the potential of TiO 2 in many field, including oxygen evolution reaction (OER), has not yet been fully developed. Here, we fabricate component tunable rutile-anatase TiO 2 /reduced graphene oxide (RGO) nanocomposites with high OER activity which exhibit a current density of 10 mA cm −2 at an overpotential of 283 mV. The performance is superior to the previous reported TiO 2 (600 mV) and comparable with the leading results of other active materials. The catalytic mechanism is suggested according to our experimental results that the interactions between rutile and anatase, as well as RGO and TiO 2 result in the enhancement of adsorption of hydroxyl. Such an adsorption is advantageous to provide a surface reaction environment and reduce the activation energy of the electrochemical process, resulting in the best OER performance. This work should stimulate the design of more materials for the improvement of OER activity.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
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IF 7.392
Ruiming Fang,Zhongqing Yang,Zukhra C. Kadirova,Ziqiang He,Ziqi Wang,Jingyu Ran,Li Zhang
The visible-light photocatalytic reduction of CO 2 becomes a vital breakthrough to alleviate the greenhouse effect and achieve carbon neutrality. In this paper, ultrathin g-C 3 N 4 nanosheets of 1.74 nm were constructed, and K + was successfully doped between layers. The yields of CO and CH 4 are 1.65 μmol·g −1 ·h −1 and 0.15 μmol·g −1 ·h −1 , which are 4.70 and 7.27 times higher than the original g-C 3 N 4 , respectively. The ultra-thin nano-lamellar structure shortens the carrier transmission distance, and the intercalation of K + not only promotes the electron transport between g-C 3 N 4 layers but also changes the original hybrid mode of the catalytic system, thus shortening the band gap and adjusting the energy band structure. In addition, the CO 2 adsorption center of the K + intercalated g-C 3 N 4 is transferred from the coordinated carbon atom to the center of the triazine unit, and the binding energy is obviously increased, which strengthens the CO 2 adsorption. Finally, through in-situ DRIFT characterization, it is speculated that the reaction enhancement mechanism is that the modified catalyst promotes the adsorption and activation of CO 2 , resulting in the production of more intermediates, especially more hydrocarbon intermediates, which is more conducive to the photocatalytic reduction of CO 2 .
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
DOI
高影响因子
Nanoscale Research Letters
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2018
·Vol. 13
·期 1
·1-7
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IF 3.125
Wang Jie,Li Meisheng,Qian Ming,Zhou Shouyong,Xue Ailian,Zhang Lili,Zhao Yijiang,Xing Weihong
Abstract TMC-incorporated carbon nitride (CN) with hexagonal and quadrangle honeycomb-like structure and having periodic lattice defects linked by –CONH– bond was synthesized through combining the high calcination with the chemical condensation of melamine and 1,3,5-benzenetricarbonyl trichloride. The obtained CN has a tri-s-triazine ring and benzene ring skeleton, which makes it have excellent mechanical and thermal stability. The BET specific surface area was enhanced to about 125.6 m 2 /g, and the mean pore size is about 3.43 nm. This CN exhibited an excellent adsorption-enhanced photocatalytic performance. Graphical abstract
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
·
IF 4.326
Jun Xiao,Mengmeng Wang,Yaru Wang,Xunxun Li,Jiaqin He,Yunchong Liu,Qingfeng Xu,Hua Li,Najun Li,Dongyun Chen,Jianmei Lu
Catalytic oxidation is one of the most promising methods to remove toluene; manganese-cerium catalysts have high activity in the catalytic oxidation of toluene. Herein, nano-sized ZSM-5 was synthesized using a simple hydrothermal method, and catalysts with different Mn and Ce contents were prepared via alcohol-induced redox precipitation at room temperature. In addition, zeolite provides sufficient surface area for the dispersion of manganese cerium catalysts and plays a role in concentration and enrichment in the catalytic conversion of toluene. Based on the experimental characterization results, the 20Ce/M1Z1 catalyst exhibited the best catalytic activity, achieving 90% toluene conversion at 215 °C. Moreover, the catalyst still has excellent catalytic activity in humid environments. This work provides a new strategy to expose more active sites and enhance toluene adsorption, which provides a reference for the development of more efficient catalysts in the future.
研究领域:
环境科学
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催化材料
✓ 已验证
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
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2017
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IF 6.198
Junlang Qiu,Fuxin Wang,Tianlang Zhang,Le Chen,Yuan Liu,Fang Zhu,Gangfeng Ouyang
Decreasing the tedious sample preparation duration is one of the most important concerns for the environmental analytical chemistry especially for in vivo experiments. However, due to the slow mass diffusion paths for most of the conventional methods, ultrafast in vivo sampling remains challenging. Herein, for the first time, we report an ultrafast in vivo solid-phase microextraction (SPME) device based on electrosorption enhancement and a novel custom-made CNT@PPY@pNE fiber for in vivo sampling of ionized acidic pharmaceuticals in fish. This sampling device exhibited an excellent robustness, reproducibility, matrix effect-resistant capacity, and quantitative ability. Importantly, the extraction kinetics of the targeted ionized pharmaceuticals were significantly accelerated using the device, which significantly improved the sensitivity of the SPME in vivo sampling method (limits of detection ranged from 0.12 ng·g–1 to 0.25 ng·g–1) and shorten the sampling time (only 1 min). The proposed approach was successfully applied to monitor the concentrations of ionized pharmaceuticals in living fish, which demonstrated that the device and fiber were suitable for ultrafast in vivo sampling and continuous monitoring. In addition, the bioconcentration factor (BCF) values of the pharmaceuticals were derived in tilapia (Oreochromis mossambicus) for the first time, based on the data of ultrafast in vivo sampling. Therefore, we developed and validated an effective and ultrafast SPME sampling device for in vivo sampling of ionized analytes in living organisms and this state-of-the-art method provides an alternative technique for future in vivo studies.
研究领域:
环境分析化学
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生物分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Cleaner Production
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2022
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IF 11.072
Qiangshun Wu,Muhammad Saboor Siddique,Yuankun Yang,Mi Wu,Li Kang,Hanpei Yang
Fe-based metal organic frameworks (Fe-MOFs) being a newly developed photo-Fenton catalyst, have gained ever-increasing attention for environmental remediation, but have been limited by high synthesis cost (high energy-consumption and low yield). In this work, economical and scalable synthesis of Fe-BDC 1 (BDC denotes as terephthalic acid) was achieved via facile stirring under ambient condition, and its adsorptive, photocatalytic, Fenton-like and photo-Fenton performances were comprehensively explored against contaminants removal . In comparison, synthesized Fe-BDC 2 with the common solvothermal method, the yield of Fe-BDC 1 increased 3.4 times. Also, its adsorption capacity towards Rhodamine B (Rh. B) increased about 5.85 times. Moreover, the significantly improved degradation of Rh. B was observed in the Fenton-like and photo-Fenton systems with the increased reaction rate constants up to 4.90 and 2.33 times, respectively. This enhanced catalytic performance of Fe-BDC 1 was mainly attributed to the enlarged specific surface area (SSA) and favorable electron separation and migration, resulting into the accelerated ≡Fe(II)/≡Fe(III) cycle and increased yield of reactive oxidative species (ROSs). Additionally, the unique light-induced adsorption enhancement further strengthened the contaminants removal. Fe-BDC 1 as photo-Fenton catalyst was found superior over conventional catalysts in terms of advantages including: low dose requirement of catalysts (decrease in an order of magnitude) and H 2 O 2 , wide pH working range (3.0–9.0), excellent reusability and stability, universal removal behavior against all organic pollutants, and remarkable synergism between photocatalysis and Fenton-like process with synergistic factor of 77.23%. Moreover, the Fe coordinative unsaturated sites (Fe CUSs) and ·OH were determined as the active sites and the main ROSs, respectively, responsible for highly efficient pollutant degradation . This work gives a feasible solution for the preparation of Fe-MOFs with low synthesis cost and high yield, paving ways for their practical mass application in heterogeneous photo-Fenton oxidation .
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2019
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IF 2.781
Dongmei Zeng,Zhenhua Dan,Fengxiang Qin,Hui Chang
Cobalt alloying for Fe 83.3 Si 4 B 8 P 4 Cu 0.7 amorphous alloy can enhance the decolorization performances of azo dye wastewater. Co substitutions in amorphous Fe 83.3-x Co x Si 4 B 8 P 4 Cu 0.7 ( x = 0, 10, 20 and 40 at.%) alloys play a positive role in improving the decolarization efficiencies of methyl orange azo dyes (MO). Amorphous Fe 73.3 Co 10 Si 4 B 8 P 4 Cu 0.7 alloy has better abilities to break –N=N– bonds of MO than Fe 83.3 Si 4 B 8 P 4 Cu 0.7 , Fe 63.3 Co 20 Si 4 B 8 P 4 Cu 0.7 and Fe 43.3 Co 40 Si 4 B 8 P 4 Cu 0.7 alloys, and is able to degrade MO to mainly form sulfanilic acid anions with trace amounts of intermediate products with higher complete degrees. The rate determining step of MO degradation is the surface adsorption on amorphous Fe 43.3 Co 40 Si 4 B 8 P 4 Cu 0.7 alloy, and the intermediate degradation products with –N=N– bonds are dominantly formed with small amount of sulfanilic acid anions. The highest surface-area normalized rate constant ( k SA ) of MO degraded by Fe 73.3 Co 10 Si 4 B 8 P 4 Cu 0.7 ribbons is confirmed to be 0.69, 3 times higher than that of zero-valent Fe powders and Fe 83.3 Si 4 B 8 P 4 Cu 0.7 ribbons. The degradation pathways of MO by amorphous Fe 73.3 Co 10 Si 4 B 8 P 4 Cu 0.7 alloy different from those by Fe 83.3 Si 4 B 8 P 4 Cu 0.7 and Fe 43.3 Co 40 Si 4 B 8 P 4 Cu 0.7 alloys have been clarified on basis of the UV–Vis and HPLC-MS data. The experimental results manifest that the degradation performances are enhanced by Co substitutions due to the sharp decrease of reaction activation energies and the improvements of adsorption performances. The mechanism changes from reduction degradation to adsorption-determined degradation modes with increases of Co concentrations. MO degradations on amorphous Fe 73.3 Co 10 Si 4 B 8 P 4 Cu 0.7 alloy are governed by adsorption-enhanced reductive degradation mechanism.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Junpu An,Hongchen Liu,Fan Yang,Kexin Wei,Chunhui Yu,Siyuan Sun,Yang Sun,Qing Guo,Jianfeng Wang,Chenlin Wang,Jiahui Liu,Kuobo Wang,Yongfeng Li
Nickel-based catalysts show great potential as promising candidates for the electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF). However, the limited adsorption capacity of nickel-based catalysts for OH – and HMF limits their further development. In this study, amorphous Fe/NiOOH-SO x was generated from nanosheets (Fe/NiOOH-Ni 3 S 2 ), which was pre-fabricated on nickel foam via pre-reconstruction and anionic regulation strategy. The optimized catalyst Fe/NiOOH-Ni 3 S 2 demonstrated exceptional activity in the HMF oxidation reaction (HMFOR) with a current density of 10 mA cm −2 at 1.32 V vs RHE, accompanying with the 98.9 % HMF conversion, 97.8 % 2,5-Furandicarboxylic acid (FDCA) selectivity, 96.8 % Faraday efficiency, and stability for ten cycles. The incorporating amorphous FeOOH reduces the electron density around Ni, promoting the formation of high-valent Ni spices. Meanwhile, the SO x combined with amorphous hydroxy nickel oxide provides unsaturated sites, which enhances the adsorption capacity of HMF. Density functional theory (DFT) computations reveal that the designed amorphous Fe/NiOOH and surface-adsorbed SO x collectively modulate the electronic structure of the catalyst, causing an upwards shift of the NiOOH d-band center and enhancing adsorption capacities for both HMF and OH – . This study proposes the adsorption enhancement mechanism of regulating electronic structure and offers a rational strategy for HMFOR electrocatalysts.
研究领域:
催化化学
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材料科学
·
可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Zhao Sun,Tingwei Wang,Rongjun Zhang,Hongwei Li,Yu Wu,Sam Toan,Zhiqiang Sun
Gasification is one of the most promising approaches to accomplishing efficient utilization of biomass, nevertheless, it shows severe problems of low efficiency and syngas quality, which deserves further improvements. In this regard, deoxygenation-sorption-enhanced biomass gasification is proposed and experimentally explored using deoxidizer-decarbonizer materials ( x CaO-Fe) for intensified hydrogen production . The materials follow the deoxygenated looping of Fe 0 -3e − ↔Fe 3+ as an electron donor and the decarbonized looping of CaO + CO 2 ↔ CaCO 3 as a CO 2 sorbent. Specifically, the H 2 yield and CO 2 concentration reach 7.9 mmol·g −1 biomass and 10.5 vol%, which increases by 311% and decreases by 75%, respectively, compared with conventional gasification, confirming the promotion effect of deoxygenation-sorption enhancement. Fe embedded within the CaO phase is successfully constructed with the formation of functionalized interface structure, affirming the strong interaction between CaO and Fe. This study brings in a new concept for biomass utilization via synergistic deoxygenation and decarbonization, which will substantially boost high-quality renewable hydrogen production .
研究领域:
能源与环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）