JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2017
·Vol. 29
·期 6
·4441-4448
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IF 2.019
Liu Shuhua,Huang Zongyu,Ren Xiaohui,Chen Xinhang,Qiao Hui,Tang Pinghua,Qi Xiang
A novel P25/Black phosphorus/Graphene hybrid has been successfully prepared by loading two components [P25 and Black phosphorus (BP)] on graphene nanosheets via a simple one-step hydrothermal method. The P25/BP/Graphene hybrids are characterized by scanning electron microscopy (SEM),Raman spectra and X-ray diffraction patterns, which confirm a good crystallized P25 and BP hybridization with graphene. Photoelectrochemical tests verify that the photocurrent density of as-prepared P25/BP/Graphene ternary hybrid (9.32 μA/cm 2 ) is greatly improved at 1 V, which is nearly 34 times higher than that of sole P25 and 4.8 times as much as that of P25/Graphene. The improved photocatalytic activity is proposed to be benefited from the higher carrier mobility and additional accessible sites derive from the special configurations of ternary hybrid, as well as the introduction of the visible and near-infrared-activated BP photocatalyst. More importantly, this work demonstrates that the as-prepared P25/BP/Graphene hybrid would be an attractive candidate as high-performance photocatalyst, and provide positive proof of concept for developing the practical applications of graphene and black phosphorus based composites.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Frontiers of Environmental Science & Engineering
·
2020
·Vol. 15
·期 5
·1-12
·
IF 4.053
Li Xinzheng,Li Zhiming,Xing Zhihui,Song Zhimin,Ye Bei,Wang Zhengming,Wu Qianyuan
In this work, LED-based photocatalysis using mixed rutile and anatase phase TiO 2 (P25) as the photocatalyst could effectively remove 5-chloro-2-methyl-4-isothiazolin-3-one (CMIT) and methylisothiazolone (MIT) simultaneously, with removal efficiencies above 80% within 20 min. The photocatalytic degradation of both CMIT and MIT could be modeled using a pseudo-first-order rate equation. The photocatalytic degradation rates of CMIT and MIT under LED280 illumination were higher than under LED310 or LED360 illumination. At concentrations below 100 mg/L, the degradation rate of CMIT and MIT under LED illumination significantly increased with increasing catalyst dosage. Additionally, the effects of the chloride ion concentration, alkalinity and dissolved organic matter on the photocatalytic degradation reaction were also investigated. The ·OH free radicals were determined to play the primary role in the photocatalytic degradation reaction, with a degradation contribution of >95%. The photocatalytic degradation of CMIT and MIT mainly occurred via oxidation, hydrolysis, and chain growth reactions. Finally, the possible photocatalytic degradation pathways of CMIT and MIT over LED/P25 are proposed.
研究领域:
环境科学
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化学工程
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生物学
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DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Jia-qi Bai,Jiahui Xu,Mei Ma,Zhengan Miao,Jiawen Yu,Huangfei Liu,Zhangkai Qian,Mengdie Cai,Qin Cheng,Yong Jiang,Song Sun
As haloanilines (HANs) are important organic intermediates and fine chemicals, their preparation over non-noble-metal-based catalysts by catalytic hydrogenation has attracted wide attention. However, the reaction suffers from relatively harsh conditions. Herein, we found that a 3.5%Ni/P25 catalyst exhibited superior photo-thermal catalytic activity with a TOFs of 5207 h–1 for hydrogenation of p-chloronitrobenzene (p-CNB) to p-chloroaniline under a 300 W full spectrum, which was much higher than that of photo- and thermal catalysis alone. Moreover, the 3.5%Ni/P25 catalyst could be recycled 4 times and was effective for the hydrogenation of various halonitrobenzenes (HNBs) with superior selectivity. Furthermore, the kinetic research showed that the excellent catalytic performance could be attributed to the better activation and dissociation of H2 by photo-thermal catalysis and the hydrogenation of p-CNB obeyed the condensation routine by ionic hydrogenation over 3.5%Ni/P25.
研究领域:
化学工程
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催化科学
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产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2022
·Vol. 68
·期 12
·e17852
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IF 4.167
Yang Zhao,Xinyi Zhang,Jiarui Yang,Mingyu Gao,Pengfei Yang,Qian Wang,Dianqing Li,Junting Feng
In this work, a commercial P25 (TiO 2 ) with phase junctions between (101) and (110) faces supported Pt catalyst was prepared for glycerol selective oxidation, giving a decent 76.8% glyceric acid (GLYA) yield, and good stability. The kinetic experiments calculated apparent activation energy, turnover frequency (TOF), and reaction rates, demonstrating Pt/P25 could facilitate glyceraldehyde (GLYAD) formation and inhibit GLYA over-oxidation. Series of structural techniques confirmed the 101/110 junctions in P25 contributed electronic effect on Pt through metal-support interface, which improved the oxygen activation ability and optimized the GLYAD/GLYA adsorption modes. Furthermore, progressive scale-up reactions were tested and the mass transfer limitations under different conditions were thoroughly studied. The obtained mass transfer factors suggested the gas–liquid and liquid–solid mass transfer were severely limited. Finally, through optimizing the conditions, Pt/P25 catalyst achieved 75.8% GLYA yield at 300 ml-scale reaction, realizing equivalent magnification with the 5 ml-scale experiment.
研究领域:
催化化学
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材料科学
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反应动力学
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产品关联
DOI
高影响因子
WATER ENVIRONMENT RESEARCH
·
2023
·Vol. 95
·期 6
·e10898
·
IF 3.1
Qiang Ren,Juming Liu,Zhilin Yang,Qi Yang
TiO 2 (P25) could significantly accelerate the degradation of carbon tetrachloride (CT) in the UV/K 2 S 2 O 8 system by about 4 times, and 88.5% of the CT was dechlorinated. The presence of dissolved oxygen (DO) could delay the degradation process. The addition of P25 produced •O 2 − through the transformation of DO, so as to prevent the inhibitory effect. In this work, it was proved that P25 could not enhance the persulfate (PS) activation. The presence of P25 delayed the CT degradation in the absence of DO. Furthermore, the results of electron paramagnetic resonance (EPR) and quenching experiments demonstrated that the presence of P25 could produce •O 2 − , which could remove CT. Therefore, this work highlights the function of •O 2 − during the reaction and excludes the possibility that the presence of P25 could activate PS under the UV illumination. Then, the pathway of the CT degradation is discussed. Heterogeneous photocatalysis could provide a new method to deal with the problems caused by DO. Practitioner Points The main reason of the improvement in P25-PS-UV-EtOH system is transformation of dissolved oxygen into superoxide radical in presence of P25. The addition of P25 could not accelerate PS activation in P25-PS-UV-EtOH system. Photo-induced electron, superoxide radical, alcohol radical and •SO 4 − could all contribute to CT degradation, and the pathway is discussed.
研究领域:
环境科学
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光催化
✓ 已验证
DOI
PubMed
高影响因子
Nuclear Materials and Energy
·
2022
·
IF 3.037
Yichao Gong,Yuefei Wang,Junjie Li,Fei Han,Mao Deng,Qingze Na,Yijiang Yang,Zhanwen Liu,Mingxiang Tang,Chao Dang,Guojun Zhang
For solid tritium breeding materials, a high sintering temperature is essential to achieve satisfactory density, high crushing load, favorable physical and chemical properties, while lithium volatilization and grain coarsening occur at higher sintering temperature, which are not conducive to tritium production and release. Therefore, low temperature sintering of lithium containing ceramics needs to be studied. In this work, P25 titanium dioxide was hydrothermally treated in alkaline solution, and then used as titanium source to prepare Li 2 TiO 3 ceramics. The prepared Li 2 TiO 3 ceramics exhibit uniform and dense microstructure and extremely high crushing load (a.v. 78.93 ∼ 83.98 N) at a relative low sintering temperature (750 ∼ 800 °C). The thermal conductivity of Li 2 TiO 3 ceramic sintered at 800 °C is calculated to be 3.48 W/m•K at room temperature, retaining 2.50 W/m•K at 773 K, which is comparable to the values in literatures. The results suggest the sintering activity of Li 2 TiO 3 is greatly enhanced when alkaline hydrothermally treated P25 is used as titanium source.
研究领域:
材料科学
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核能工程
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DOI
高影响因子
CHEMOSPHERE
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2022
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IF 8.943
Fengjie Chen,Wanchao Yu,Yarui Wang,Silong Wang,Ying Liang,Ling Wang,Yong Liang,Lixia Zhao,Yawei Wang
Photodegradation is a new approach for the removal of pentachlorophenol (PCP). Photooxidation degradation (using hydroxyl radicals) exhibits better performance to remove PCP than photoreduction degradation, but the former will lead to an increase in the production of toxic by-products such as tetrachloro-1,4-benzoquinone (TCBQ). Thus, a new strategy is required to enhance PCP photodegradation and simultaneously inhibit toxic intermediates production. Herein, TiO 2 (P25)/polydopamine (PDA)/BiOBr was synthesized and used to photodegrade PCP. Based on the relative position of the CB and VB of P25 and BiOBr, and PDA as an electron transfer mediator, a high number of holes, electrons, and superoxide anions were produced instead of hydroxyl radicals . The photocatalytic activity of P25/PDA/BiOBr exhibited the best performance among as-prepared samples, reaching a k (pcp) value of 0.4 min −1 (20 μM PCP) under UV light irradiation within 10 min. According to chemiluminescence and acute toxicity assays, relative to P25, the toxic intermediates of TCBQ and trichlorohydroxy-1,4-benzoquinone (OH-TrCBQ) generation was greatly reduced over P25/PDA/BiOBr, with a lack of toxic product generation during PCP photodegradation process. These findings provide an alternative strategy to achieve greener and more efficient organic pollutant photodegradation.
研究领域:
环境科学
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光催化材料
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产品关联
DOI
PubMed
高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
·
2021
·Vol. 47
·期 6
·2331-2338
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IF 2.914
Gong Jianqiu,He Chun,Zhang Jinlong,Wang Lingzhi
Photocatalytic treatment of water pollutants has attracted extensive attention due to its low energy consumption, low cost and the avoidance of secondary environmental pollution. However, most photocatalysts are in powder form, which makes it difficult to separate from the water system after the reaction. Especially in practical applications, the recycling of the catalyst is an important part. Based on the characteristics that sodium alginate (SA) is easy to form gels under mild conditions, GO-P25@SA gel beads were prepared. The catalyst can be separated from the water system by simple filtration, which greatly saves the recycle cost. Besides, the light response of TiO 2 (P25) and excellent conductivity of graphene oxide (GO) make GO-P25@SA have excellent photocatalytic degradation and cyclic stability for rhodamine B (RhB). In this work, the unique merits of GO and sodium alginate (SA) in developing functionalized photocatalyst were demonstrated, providing a low-cost and easy recycle treatment strategy for rhodamine B degradation.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
PLoS One
·
2017
·Vol. 12
·期 3
·e0172747
·
IF 2.806
Xinying Zhang,Yan Wu,Gao Xiao,Zhenping Tang,Meiyin Wang,Fuchang Liu,Xuefeng Zhu
Azo dyes are very resistant to light-induced fading and biodegradation. Existing advanced oxidative pre-treatment methods based on the generation of non-selective radicals cannot efficiently remove these dyes from wastewater streams, and post-treatment oxidative dye removal is problematic because it may leave many byproducts with unknown toxicity profiles in the outgoing water, or cause expensive complete mineralization. These problems could potentially be overcome by combining photocatalysis and biodegradation. A novel visible-light-responsive hybrid dye removal agent featuring both photocatalysts (g-C 3 N 4 -P 25 ) and photosynthetic bacteria encapsulated in calcium alginate beads was prepared by self-assembly. This system achieved a removal efficiency of 94% for the dye reactive brilliant red X-3b and also reduced the COD of synthetic wastewater samples by 84.7%, successfully decolorized synthetic dye-contaminated wastewater and reduced its COD, demonstrating the advantages of combining photocatalysis and biocatalysis for wastewater purification. The composite apparently degrades X-3b by initially converting the dye into aniline and phenol derivatives whose aryl moieties are then attacked by free radicals to form alkyl derivatives, preventing the accumulation of aromatic hydrocarbons that might suppress microbial activity. These alkyl intermediates are finally degraded by the photosynthetic bacteria.
研究领域:
环境科学
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微生物学
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光催化技术
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Lei Wang,Zhiting Zhang,Qi Han,Ying Liu,Junbo Zhong,Jiufu Chen,Jingwei Huang,Houde She,Qizhao Wang
Commercial TiO 2 (P25) is a potentially promising catalyst for photocatalytic CO 2 reduction. Nonetheless, the inefficient light capture ability and egregious charge recombination restrict its further utilization. In this work, CdS and P25 are incorporated to form the composite CdS-P25, which is further immobilized on the surface of a copper-based organic metal framework (MOF), ZIF-67, so as to establish a ternary hybrid CdS-P25/ZIF-67 via a facile hydrothermal method. On the basis of the enhancement in light absorption resulted from the formation of CdS-P25, the incorporation of ZIF-67 further prolongs the light absorption edge of CdS-P25/ZIF-67, up to 552 nm. In addition, the introduction of ZIF-67 with the dual Z-Scheme system constructed could significantly suppress the charge recombination, as revealed by the transient photocurrent value of CdS-P25/ZIF-67, which is 3.47 μA cm −2 , about 20.4 times than that of CdS-P25. Accordingly, the photocatalytic assessment of CdS-P25/ZIF-67 also presents a significantly amelioration in CO 2 reduction reaction (CO 2 RR) in comparison with either CdS-P25 or ZIF-67, giving 1.58 μmol h −1 CH 4 and 1.49 μmol h −1 CO production. Our work sheds light on the investigation of efficacious construction of P25 based hybrids for light-driven photocatalysis.
研究领域:
材料科学
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环境科学
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化学工程
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光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2019
·
IF 3.261
Yuan Liao,Jiannan Lin,Baihua Cui,Gang Xie,Shi Hu
Photocatalytic nitrogen fixation has been burgeoning since the 20th century because the conventional Haber–Bosch process is quite energy-intensive, so other sustainable alternatives are highly required. This work uses a facile way to synthesize ultrasmall metal ruthenium on TiO 2 (P25) for photocatalytic nitrogen fixation at ambient temperature and pressure. The metal ruthenium is 2–3 nm in size and evenly dispersed over TiO 2 (P25). Both Indophenol method and ion chromatography are used to detect the ammonia yield, and possible mechanism is also proposed.
研究领域:
化学
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材料科学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Shuo Chen,Ting-Ting Qian,Ren Zhu,Hong Jiang
The apparent rate constant k of the photocatalytic reaction of typical aromatic pollutants, i.e., dyestuff (rhodamine B [RhB]), phenol (bisphenol A [BPA]), organic chloride (4-chlorophenol [4-CP]), drug (carbamazepine [CBZ]), antibiotics (tetracycline [TC]), and endocrine contaminants (dimethyl phthalate [DMP]), with TiO 2 at different ratios of rutile (W R ) was experimentally obtained. The modelling results between k and W R show that the optimal W R of the six pollutants were in a narrow interval of [0.347, 0.384] by LogNormal model. The two-factor interaction (2FI) and Linear model between the kinetic k value and the photocatalytic performance parameters were established. The Pareto analysis results show that Brunauer–Emmett–Teller (BET) specific surface (A) has little effect on the photocatalytic system, and the most important parameter is the interaction between Energy gap (Eg) and Photoluminescence (PL) intensity (B-C) that has a positive effect on photocatalytic reaction kinetics. The single-factor Eg (B) and PL intensity (C) have negative effects on UV photocatalytic reaction kinetics. This work can help narrow the range of the optimal W R of P25-TiO 2 for emerging organic pollutants.
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
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