DESALINATION
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2023
·
IF 9.9
Jiancong Zhang,Yang Zi,Wei Shan,Prayoon Songsiriritthigul,Min Luo,Than Zaw Oo,Mono Zaw,Nyein Wint Lwin,Su Htike Aung,Guangguo Ying,Fuming Chen
Nowadays, stable photoelectrochemical seawater desalination is a challenge. In this work, an environmentally friendly WO 3 /BiVO 4 photoanode is reported to achieve stable solar-driven redox desalination . The WO 3 /BiVO 4 photoanode was prepared by the hydrothermal method and drop-casting and the cathode is the activated carbon coated on graphite paper. Within the desalination system , the I − /I 3 − redox species are recycled between anode/cathode chambers. In the short-circuit state, with illumination as the driving force, the salt removal rate of 65.03 μg/(cm 2 ·min) is obtained without the electric consumption. During the desalination process, the energy output process can be implemented with a salt removal rate of 29.8 μg/(cm 2 ·min) with constant current discharge. Importantly, the solar desalination system based on WO 3 /BiVO 4 photoanode is quite stable. Within the five cycles, the variation of the salt removal rate is within 3.32 μg/(cm 2 ·min). As the practical application, the seawater is desalted to the freshwater standard using the current system, in which the conductivity decreases to 0.96 mS/cm from 53 mS/cm. This work provides a feasible approach to developing stable and efficient solar-driven seawater desalination for long-term usage.
研究领域:
环境科学
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材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2014
·
IF 1.552
Chunyu Zhao,Yantao Shi,Zhiyong Zhong,Tingli Ma
Counter electrodes (CEs) for dye-sensitized solar cells (DSCs) are important for collecting electrons and catalyzing the iodide/tri-iodide reaction. Pt CEs are commonly prepared by magnetron sputtering , which is expensive and requires vacuum conditions. Incorporating the low cost surfactant Span-85 improved the adhesion between the Pt particles and conductive substrate, and allowed Pt-based CEs to be screen-printed. The screen-printed CE was compared with those prepared by dip-coating and spin-coating. Photoelectric conversion efficiencies of 7.30%, 6.96% and 7.03% were achieved for DSCs containing screen-printed, dip-coated and spin-coated CEs, respectively. Optical transmittance measurements, scanning electron microscopy, and film adhesion tests results showed that the surfactant improved film adhesion and increased transmittance, and the screen-printed CEs exhibited comparable transmittance to the dip-coated CEs. Screen-printing resulted in Pt particles being more uniformly distributed on the substrate, when compared with dip-coating or spin-coating. Cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel-polarization curves showed that the catalytic activity of the screen-printed Pt-based CEs were higher than that of the other CEs. Screen-printing is suitable for realizing the low-cost large-scale production of large Pt-based CEs.
研究领域:
材料科学
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能源技术
✓ 已验证
DOI
高影响因子
Biosensors-Basel
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2023
·Vol. 13
·期 6
·585
·
IF 5.4
Yunping Lai,Beirong Yu,Tianran Lin,Li Hou
A multicolor visual method for the detection of hydrogen peroxide (H2O2) was reported based on the iodide-mediated surface etching of gold nanostar (AuNS). First, AuNS was prepared by a seed-mediated method in a HEPES buffer. AuNS shows two different LSPR absorbance bands at 736 nm and 550 nm, respectively. Multicolor was generated by iodide-mediated surface etching of AuNS in the presence of H2O2. Under the optimized conditions, the absorption peak Δλ had a good linear relationship with the concentration of H2O2with a linear range from 0.67~66.67 μmol L−1, and the detection limit is 0.44 μmol L−1. It can be used to detect residual H2O2in tap water samples. This method offered a promising visual method for point-of-care testing of H2O2-related biomarkers.Keywords:iodide;gold nanostar;H2O2
研究领域:
分析化学
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生物医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
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2016
·Vol. 6
·期 74
·70460-70467
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IF 3.289
Ye Zhang,Zhe Sun,Chengzhen Shi,Feng Yan
An imidazolium thiopropionate-based redox couple is introduced as an improved organic alternative to iodide/triiodide (I−/I3−) couples for dye-sensitized solar cells (DSSCs). The synthesized thiolate/disulfide (BMIT/BMIDT) redox couple shows negligible absorption in the visible spectral range, and higher redox potential (+0.72 V vs. NHE) compared with that of I−/I3−. With the optimized redox couple (such as 0.1 M/0.1 M)/dye N719 formulation, the fabricated DSSCs exhibit an average overall power conversion efficiency (PCE) of 6.8% and 8.1% under the simulated air mass 1.5 solar spectrum illumination at 100 and 50 mW cm−2, respectively. However, a higher concentration of the BMIT/BMIDT redox couple (such as 0.4 M/0.4 M) decreases the PCE of the devices, due to the desorption of dye molecules from the TiO2 photoelectrode surface.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Analytical Methods
·
2012
·Vol. 4
·期 10
·3471-3477
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IF 1.547
Xu Han,Lianghui Cao,Heyong Cheng,Jinhua Liu,Zigang Xu
Ion-pair reversed phase high performance liquid chromatography coupled to inductively coupled plasma mass spectrometry (RP-HPLC-ICP-MS) has been used to determine two inorganic iodine species (I− and IO3−) and two organic iodinated amino acids (MIT and DIT) in seaweed and seawater samples within 5 min. The mobile phase used for a reversed phase C18 column was as follows: 2.0 mM tetraethylammonium hydroxide, 10 mM L-phenylalanine and 1% methanol (pH 8.9). Values of 1.5 mL min−1 for the flow rate of the mobile phase and 25 °C for the column temperature were selected for rapid separation of iodine species. The detection limits for IO3−, I−, MIT and DIT were 0.061, 0.052, 0.079 and 0.24 μg L−1, each, and the repeatabilities of peak height and peak area (20 μg L−1 for iodide and iodate, 40 μg L−1 for MIT, 100 μg L−1 for DIT) were all lower than 4%. Under the optimized conditions, the proposed method was successfully applied for the speciation analysis of iodine in seaweed and seawater samples. Recoveries of IO3−, I−, MIT and DIT in seaweed and seawater samples were between 90 and 110%. All results prove its advantages including high sensitivity, environmentally friendly, low time consumption, which are beneficial for routine analysis of iodine speciation in environmental and food fields.
研究领域:
分析化学
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环境科学
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食品科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
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2014
·
IF 5.211
Guiqiang Wang,Juan Zhang,Shuai Kuang,Shaomin Liu,Shuping Zhuo
Cobalt sulfide (CoS)/graphene composites are prepared by a facile one-pot hydrothermal method in the presence of graphene oxide and used as a low-cost substitute for Pt to fabricate the counter electrode in dye-sensitized solar cells. TEM , SEM and AFM characterizations show that CoS nanoparticles are highly dispersed on the surface of graphene nanosheets . This unique nanostructure affords a promising synergistic effect on electrocatalytic performance for the iodide/triiodide redox reaction . Electrochemical impedance spectroscopy and Tafel polarization analyses confirm that the CoS/graphene composite indeed provides simultaneously superior electrocatalytic activity and enhanced electrical conductivity as the counter electrode for dye-sensitized solar cells. Under an illumination of AM 1.5 simulated solar light (100 mW cm −2 ), the dye-sensitized solar cell based on the CoS/graphene composite counter electrode achieves a conversion efficiency of 7.08%, which is comparable to that of the cell based on Pt electrode and much higher than those of the devices with CoS and graphene electrodes.
研究领域:
材料科学
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能源技术
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纳米技术
✓ 已验证
DOI
高影响因子
MICROCHIMICA ACTA
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2013
·Vol. 180
·期 5
·453-460
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IF 3.434
Du Fangkai,Zeng Fang,Ming Yunhao,Wu Shuizhu
We report on a simple method for the determination of iodide in aqueous solution by exploiting the fluorescence enhancement that is observed if the complex formed between carbon dots and mercury ion is exposed to iodide. Fluorescent carbon dots (C-dots) were treated with Hg(II) ion which causes quenching of the emission of the C-dots. On addition of iodide, the Hg(II) ions are removed from the complex due to the strong interaction between Hg(II) and iodide. This causes the fluorescence to be restored and enables iodide to be determined in the 0.5 to 20 μM concentration range and with a detection limit of ~430 nM. The test is highly selective for iodide (over common other anions) and was used for the determination of iodide in urine.
A“turn-on” fluorescent probe based on carbon dots was obtained and using it to determine the concentration of iodide according to the fluorescent enhancement in aqueous solution
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
高影响因子
Crystals
·
2021
·Vol. 11
·期 6
·594
·
IF 2.589
Bing Lei,Xin Wu,Wei Liu
A new organic-inorganic hybrid structure based on copper (I) iodide staircase chain 1D-Cu2I2(5-chloropyrimidine)2(1) has been synthesized by a slow-diffusion method. It emits red emission peaking at 620 nm. The internal quantum yield (IQY) measured for this compound is 6.5% under 360 nm excitation. This compound exhibits potential as a non-rare-earth light-emitting phosphor alternative.Keywords:copper iodide;organic-inorganic hybrid;phosphor
研究领域:
材料科学
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光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
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2023
·Vol. 332
·期 4
·1193-1202
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IF 1.6
Zhao Yuting,Li Jie,Chen Long,Guo Qi,Li Lingyi,Chai Zhifang,Wang Shuao
Efficient removal of iodide (I − ) and iodate (IO 3 − ) from aqueous solution is highly desirable for waste disposal and remediation of radioiodine contamination. We report here a bifunctional anion exchange resin Purolite A530E for the effective I − /IO 3 − adsorption, which shows a priority anion-exchange affinity for I − (99%) over IO 3 − (9.7%). The maximum adsorption capacity for I − is 275.16 mg·g −1 fitted by the Langmuir isotherm model, much higher than most adsorbents. Furthermore, Purolite A530E exhibits great selectivity for I − over competing anions, which endows the resin with promising I − remediation that over 99% I − can be removed from simulated Hanford groundwater (HGW).
研究领域:
环境科学
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放射化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Fei Rao,Gangqiang Zhu,Mirabbos Hojamberdiev,Weibin Zhang,Shiping Li,Jianzhi Gao,Fuchun Zhang,Yuhong Huang,Yu Huang
Highly exposed active facets and surface oxygen vacancies (OVs) are beneficial for the photocatalytic removal of various harmful organic compounds. In this study, uniform Zn2+-doped BiOI microspheres, assembled by ultrathin nanosheets with highly exposed {001} facets, with OVs were successfully synthesized for NO removal under visible light irradiation. The phase structure and chemical states are analyzed by means of X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The transmission electron microscopy observations reveal that replacing Bi3+ with Zn2+ can lead to the increased exposure of the {001} facets. X-ray photoelectron and electron paramagnetic resonance spectroscopy results confirm that low-state Zn2+ increases the number of OVs, indicating that an increased number of OVs and a reduced thickness of the nanosheets can enhance the photocatalytic activity for the removal of NO. The photo-oxidative removal efficiency of NO over 3%Zn-BiOI reaches 53.6% and remains highly stable (52.9%) for up to 210 min under visible light irradiation. The calculation of interface adsorption confirms that OVs and Zn2+ can not only offer a donor energy level to extend the solar response range but also act as adsorption sites for low concentration of NO and O2 to optimize the transmission capacity of surface charge carriers. Moreover, this work systematically explains the function of OVs and Zn2+ in the adsorption process of NO. The in situ Fourier transform infrared spectroscopy supports understanding of the photo-oxidative removal mechanisms of NO over Zn-BiOI: (i) the byproducts were bidentate nitrites (bi-NO2–), chelate nitrites (ch-NO2–), and bridging nitrites (br-NO3–) in the dark condition and (ii) the final products were bridging nitrites and bidentate nitrites (bi-NO3–) under visible light irradiation. OVs are found to play an important role both in the dark adsorption and photo-oxidative removal of NO by the 3%Zn-BiOI sample.
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
SYNTHESIS-STUTTGART
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2013
·Vol. 45
·期 16
·2234-2240
·
IF 2.5
Wenbin Lu,Zhuye Liang,Yuwei Zhang,Fan Wu,Qun Qian,Hegui Gong
Alkyl aryl ketones were prepared on a gram scale by the nickel-catalyzed reductive coupling of alkyl iodides with aroyl chlorides. When scaled up 30-fold, this reaction shows a comparable coupling efficiency to the previously reported reaction performed under small-scale conditions. The mild and convenient reaction conditions show excellent tolerance to a range of functional groups and provide the ketones in good to excellent yields.
研究领域:
有机化学
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合成化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Zhao Li,Lei Wu,Min Chen,Qiwu Zhang,Shujuan Dai,Tonglin Zhao
Bismuth oxyiodide is one of the bismuth-based semiconductors which exhibits narrow band gaps and excellent visible light response, however modification strategies are usually desired for improving its photocatalytic reactivity. In this context, introduction of valuable components into the interlayer of BiOI is expected to work, considering its typical layered structure. In this case, mechanochemical synthesis of BiOI, with simultaneous introduction of lanthanum into its interlayer to form Bi 1-x La x OI, was conducted for the first time, and arsenic (As(III)) was selected to evaluate the photocatalytic reactivity, demonstrating excellent reaction efficiency for arsenic oxidation under a mild condition. Characterizations confirmed the incorporation of La and the presented well crystalline structure of Bi 1-x La x OI, and revealed its better visible light absorption capacity than raw BiOI. Besides the excellent electronic conductivity of Bi 0.9 La 0.1 OI, photogenerated holes (h + ) and superoxide radical species (· O 2 - ) were characterized by electron spin resonance (ESR) test, to act as predominant reactive groups during the photo-induced oxidation reaction. These findings provided a novel concept for the interlayer decoration of BiOI, and offered an alternative approach to develop its potential application for the removal of hazardous arsenic pollutants.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
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