Journal of Industrial Textiles
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2022
·
IF 2.926
Jing Han,Hai-Tao Ren,Ting-Ting Li,Bing-Chiuan Shiu,Yong-Gui Li,Jia-Horng Lin,Ching-Wen Lou
Visible light response PAN@Ag-Ag2O/Sch (PAN@AS, schwertmannite and polyacrylonitrile abbreviated as Sch and PAN) nanofibers with different mass ratios were synthesized by electrospinning technology and pH-induced precipitation reaction. X-Ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy analysis showed that the formation of Ag-Ag2O/Sch heterojunction and Ag-Ag2O nanoparticles were evenly distributed on the surface of Sch. The prepared nanofibers have high oxidative removal performance for As(III) under visible light. In the PAN@AS0.10 system, the total As removal percent can reach 90.96% after 120 min irradiation at pH 4.0. The scavenger experiments confirmed that the main active substances of the PAN@AS0.10 system were h+ and •OH. The high oxidation and removal performance of the PAN@AS0.10 composite for As(III) was attributed to the effective separation of photogenerated electron-hole pairs and high adsorption capacity of Sch for As under acidic conditions. This research provides a new material for the oxidation and removal of pollutants in water [such as As(III)] and also provides a research basis for the preparation of recyclable photocatalysts.
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JOURNAL OF MATERIALS RESEARCH
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2022
·Vol. 37
·期 5
·1070-1082
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IF 2.909
Wang Bo-Yuan,Li En-Di,Zong Yi-Chao,Wang Xiao-Bo,Yuan Jun,Zhang Fu-Qing
A well-defined structure is greatly helpful to enhance the performance of photocatalysis. Herein, we plan to fabricate multi-shell CeO 2 photocatalyst with hollow structure characters for enhanced photodegradation RhB efficiency. The SEM showed that the samples were the regular micro-spheres with a diameter of 1.5–2 μm, and the TEM image displayed these microspheres having multi-shell hollow structures with core–shell morphology. The RhB was degraded (83%) under visible light irradiation within 150 min. This multi-shell hollow CeO 2 (MSH-CeO 2 ) has a larger surface area and more oxygen vacancies (OVs), the catalytic performance is mainly improved by enhancing the light absorption properties and facilitating the separation efficiency of the electron-holes. This work introduces the effecting of morphology on the performance of the catalyst, which will provide a new idea for the construction of efficient photocatalysts. Graphical abstract
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ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
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2022
·Vol. 648
·期 7
·e202100284
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IF 1.414
Li-Juan Feng,Yan-Yu Zhao,Ru-Yang Song,Cheng-Yang Yue
By using the same saturated organic cations as structural templates, we synthesized and characterized a series of organic-inorganic hybrid lead iodides with different structural types, namely as, 1D [(Me) 4 -Pipz]Pb 2 I 6 ( 1 ), 1D [(Me) 4 -Pipz]PbI 4 ( 2 ) and 2D [(Me) 4 -Pipz] 2 Pb 5 I 14 ( 3 ), in different organic solutions. Remarkably, these hybrid lead iodides display tunable broadband light emissions from yellow (578 nm) to red (680 nm) spectral range, which can be ascribed to self-trapped excitons based on systematic spectroscopy characterizations. This work affords one structural design strategy to realize tunable structural skeletons and broadband low-energy photoluminescence emissions in hybrid lead iodides.
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ACS Applied Materials & Interfaces
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2022
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IF 10.383
Xiao Lin,Hui Deng,Yi Jia,Zhixu Wu,Yong Xia,Xingjian Wang,Siwei Chen,Yingshun Cheng,Qiao Zheng,Yunfeng Lai,Shuying Cheng
Photodetectors (PDs) for weak light signal detection have wide applications for optical communication and imaging. Antimony sulfide (Sb2S3) as a nontoxic and stable light-sensitive material becomes a promising candidate for weak light PDs, which are developing in the direction of high response, high speed, and low cost. Herein, a self-powered Sb2S3 PD with the structure of FTO/TiO2/Sb2S3/Au is developed to achieve weak light detection for 300–750 nm visible light. We control the Sb2S3 thickness with about 460 nm to match depletion region width (438 nm) and obtain an excellent photoresponsivity and 3 dB bandwidth. Furtherly, we prepare pyramid structure polydimethylsiloxane (PDMS) on the illuminating surface to enhance the performance of weak light detection by light-trapping effects. The photocurrent of Sb2S3 PD with 20 μm-sized PDMS texture achieves 13.6% improvement compared with the control one. Under weak 530 nm light illumination of 1 μW cm–2, the self-powered Sb2S3 PD with PDMS achieves high responsivity (3.41 A W–1), large detectivity (2.84 × 1013 Jones), and ultrafast speed (15 μs). The present Sb2S3 PD and light-trapping strategy are expected to provide an alternative to future commercial weak light detection applications.
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Analytical Methods
·
2022
·Vol. 14
·期 12
·1254-1260
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IF 3.532
Yamin Si,Feng Jiang,Liang Qiang,Xiaotong Teng,Chengbin Gong,Qian Tang
Dibenzothiophene and its derivatives in gasoline and diesel would release sulfur oxides during combustion, and this is harmful to human health and the environment. This paper reports a method based on a visible-light-responsive molecularly imprinted polyurethane (VMIPU) to monitor trace dibenzothiophene in gasoline. The VMIPU was prepared by a polyaddition reaction using N,N-bis-(2-hydroxyethyl)-4-phenylazoaniline as the functional monomer, dibenzothiophene as the template molecule, diphenylmethane diisocyanate as the crosslinker and castor oil as the chain extender. The VMIPU showed good visible-light-response and specific adsorption for dibenzothiophene. The trans → cis photoisomerization rate constant of azobenzene chromophores in the VMIPU shows a linear relationship with the dibenzothiophene concentration in the range of 0–20 μmol L−1. This was used to estimate trace dibenzothiophene in spiked gasoline with recoveries of 95.7–101.0% and relative standard deviations of 7.0–12.7%.
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CHEMICAL ENGINEERING JOURNAL
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2022
·
IF 16.744
Peilan Luo,Menglin Ye,Wenli Zhou,Pingping Wan,Zhongyun Ma,Zhongxian Qiu,Jilin Zhang,Ru-Shi Liu,Shixun Lian
The traditional strategy to improve material stability is to cover the surface with a shell to resist adverse environmental factors. For the red-emitting fluoride materials with easily hydrolyzed Mn 4+ on the surface, many strategies have been reported with limited effectiveness. In this work, simultaneous construction of an impermeable dual-shell on Mn 4+ -doped fluoride is proposed to solve the instability problem by a simple pyruvic acid (PA) treatment. The internal quantum efficiency of the K 2 SiF 6 :Mn 4+ with dual-shell can be optimized up to 99.71%, the photoluminescence intensity can maintain 88.5% of the original intensity after soaking in water for 360 h, and the body color is not changed even in boiling. The reduction effect of the PA solution builds a hard fluoride shell by removal of the surface Mn 4+ , and the hydrogen bonding effect of PA molecular leads to the formation of a soft organic shell. The dual-shell can effectively block the damage of fluoride by external water molecules and achieve a significant improvement in water stability. The dual effect of PA is derived from its special molecular structure containing α -ketone carbonyl and carboxyl groups. This hypothesis is supported by the results of the moisture resistance of fluoride-treated with a variety of solvents similar in molecular structure to PA. In addition, DFT calculations simulated various hydrogen bond structures that may be formed between PA molecules and fluoride surface atoms.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Hongfei Yin,Chunyu Yuan,Huijun Lv,Kaiyue Zhang,Xue Chen,Yongzheng Zhang
Environmental crisis aroused from the Cr(VI)-containing wastewater has received much attention, due to the cancer-causing and mutagenic feature of Cr(VI). Photocatalytic technology has been considered to be a favorable contestant for coping with Cr(VI)-containing effluent. In this study, Ti 3 C 2 MXene/Zn 3 In 2 S 6 Schottky junctions with different content of Ti 3 C 2 MXene were prepared for Cr(VI) photoreduction. The inherent physical and photoelectrochemical characters of the obtained Ti 3 C 2 MXene/Zn 3 In 2 S 6 Schottky junctions were fully characterized. Compared with the pure Zn 3 In 2 S 6 , all the nanocomposites showed enhanced photocatalytic performance, the apparent kinetic constant of the optimized sample was 3.17 times the height of the Zn 3 In 2 S 6 . The improved photoreduction performance largely originated from the effectual separation and transfer of the photoexcited charge carriers. In the meantime, the deleterious role of superoxide radicals for Cr(VI) photoreduction was confirmed. It is anticipated this research can deliver a new-fangled vision for constructing efficient photocatalyst for Cr(VI) photoreduction.
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Journal of Asian Ceramic Societies
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2022
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IF 2.546
Ping Yang,Zhenfei Sun,Shengwu Huang,Jun Ou,Qiangguo Jiang,Dichen Li,Shanghua Wu
Due to high light absorption and high refractive index of silicon nitride (Si3N4) ceramic, it is difficult to prepare Si3N4 slurry with favorable curing ability, high solid loading and low viscosity at the same time, and thus the high-quality Si3N4 parts are hard to fabricate via Digital Light Processing (DLP). In this paper, the oxidation process was used to enhance the curing behavior of Si3N4 slurry, and then silane coupling agent (KH560) was used to improve the rheological properties of the oxidized Si3N4 slurry. The effect of Si3N4 slurry with oxidation and modification on its rheological behavior, light absorption, curing ability and stability have been systematically investigated. A Si3N4 slurry with abundant photocuring ability, high solid loading, low viscosity and reliable stability was fabricated by the oxidized (1 h) and KH560 (1 wt.%) modified Si3N4 powders, and the dense Si3N4 ceramic parts were produced by this slurry via DLP 3D printing. Subsequently, the influence of oxidation and modification on microstructure, mechanical properties and thermal conductivity have been investigated. Finally, the microstructure and performances of Si3N4 ceramic were compared between different forming processes (including: DLP and cool isostatic pressing).
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Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 25
·8533-8540
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IF 6.4
Xiao Zhao,Shimao Wang,Fuwei Zhuge,Nengwei Zhu,Yanan Song,Mengyu Fu,Zanhong Deng,Xiaodong Fang,Gang Meng
All-inorganic perovskite CsPbBr3 single crystals (SCs) possessing both excellent photoelectric properties and environmental stability have become promising photoelectric materials. However, it remains challenging to prepare high-quality CsPbBr3 SCs with regular shape using a solution growth method due to the difference in growth rates along different crystal orientations and the difficulty in controlling the number of nucleation seeds. In this work, a solution refinement strategy has been introduced into the choline bromide assisted inverse temperature crystallization method for achieving high-quality cuboid-shaped CsPbBr3 SCs. The acquired CsPbBr3 SCs exhibit a relatively low trap density of 4.02 × 109 cm−3 and a relatively high carrier mobility of 89.72 cm2 V−1 s−1. Furthermore, the as-grown CsPbBr3 SC based photodetector exhibits high photodetection performance, especially ultrasensitive weak light detection performance. Under 530 nm light irradiation with a low light power density of 0.11 μW cm−2, the responsivity and external quantum efficiency of the CsPbBr3 SC based photodetector at a bias of 10 V could reach 36.4 A W−1 and 8520%, respectively, and a fast response speed with a rise time of 2.84 μs and a fall time of 6.38 μs has been achieved. It is worth noting that the photodetector exhibits an extremely low detection limit of 2.25 nW cm−2, indicating its great potential for weak light detection.
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MOLECULES
·
2023
·Vol. 28
·期 11
·4520
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IF 4.6
Xiangrui Feng,Hongji Chen,Hongfei Yin,Chunyu Yuan,Huijun Lv,Qian Fei,Yujin Zhang,Qiuyu Zhao,Mengmeng Zheng,Yongzheng Zhang
ZnIn2S4(ZIS) is widely used in the field of photocatalytic hydrogen production due to its unique photoelectric properties. Nonetheless, the photocatalytic performance of ZIS usually faces problems of poor conductivity and rapid recombination of charge carriers. Heteroatom doping is often regarded as one of the effective strategies for improving the catalytic activity of photocatalysts. Herein, phosphorus (P)-doped ZIS was prepared by hydrothermal method, whose photocatalytic hydrogen production performance and energy band structure were fully studied. The band gap of P-doped ZIS is about 2.51 eV, which is slightly smaller than that of pure ZIS. Moreover, due to the upward shift of its energy band, the reduction ability of P-doped ZIS is enhanced, and P-doped ZIS also exhibits stronger catalytic activity than pure ZIS. The optimized P-doped ZIS exhibits a hydrogen production rate of 1566.6 μmol g−1h−1, which is 3.8 times that of the pristine ZIS (411.1 μmol g−1h−1). This work provides a broad platform for the design and synthesis of phosphorus-doped sulfide-based photocatalysts for hydrogen evolution.Keywords:ZnIn2S4;phosphorus doping;photocatalytic;hydrogen generation
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ChemistrySelect
·
2023
·Vol. 8
·期 20
·e202300434
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IF 2.1
Lixin Zhang,Chumin Yan,Xiaoli Dong,Yu Wang,Nan Zheng,Hongchao Ma,Xiufang Zhang
Graphical In this work, the photocatalytic activity of TiO 2 with narrow band gap was successfully improved by a simple solvothermal method. Under visible-light illumination, TiO 2 sample after solvothermal treatment at 180 °C for 24 h (defined as TiO 2 -180-24) can be excited to produce photogenerated electrons and holes. Part of the electrons from the CB move to the catalyst surface and react with dissolved O 2 in solution to form ⋅O 2 − for the degradation of tetracycline (TC). Meanwhile, part of the holes from VB can also move to the catalyst surface and be directly used for the degradation of TC. In addition, the VB potential of TiO 2 -180-24 (E VB =0.56 V vs. NHE) is less positive than the oxidation potential of ⋅OH/OH − (2.38 V vs. NHE), indicating that photogenerated holes cannot oxidize OH − to generate ⋅OH. However, the results of radical capture experiments and ESR measurements indicated the presence of ⋅OH during photocatalytic degradation. Therefore, the further reduction of ⋅O 2 − can be considered as the source of ⋅OH in the photocatalytic degradation process. The generated ⋅O 2 − and ⋅OH together with h + as strong oxidants can react with TC, and finally oxidize TC into small molecular compounds such as CO 2 and H 2 O. Photocatalytic degradation of organic pollutants driven by visible-light is considered as a promising and effective water purification strategy. In this work, solvothermal treatment was carried out on visible-light-responsive TiO 2 samples in isopropyl alcohol to improve the photocatalytic degradation performance. The effects of solvothermal treatment on the microstructure, band structure, optical properties, photoelectrochemical properties and photocatalytic activity of the obtained TiO 2 samples were systematically investigated. The experimental results showed that the photocatalytic degradation performance of the treated TiO 2 samples was significantly improved. The TiO 2 sample treated for 24 h at 180 °C showed the optimal kinetic constant of photocatalytic degradation of tetracycline, which is 4.7 times that of pristine TiO 2 . This work provides some insight into the effect of solvothermal treatment on the photocatalytic properties of semiconductor photocatalysts.
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JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2023
·Vol. 70
·期 9
·1784-1795
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IF 1.8
Hong-jian Zhao,Yan Zhou,Ren-Jang Wu,Zhe Yu,Zhi-qiang Wu,Xu Li,Zheng-bing Han
Objective A highly active and stable composite photocatalyst which can be used in practical environmental remediation was developed. Methods g-C 3 N 4 /SnO 2 /BiPO 4 ternary composites (CN/SO/BPO) were synthesised via simple impregnation, and their texture structure, morphology, and surface composition were deeply characterized. Results In just 25 min under visible-light radiation, CN/SO/BPO almost eliminated rhodamine B, and the observed rate constant for the reaction was almost 36 and 3 times higher in comparison to that of CN/BPO and SO/BPO, respectively. Conclusions On the basis of experimental outcomes and DFT calculation, the direct Z-type structure of CN/SO/BPO lead to the improved photogenerated charge separation efficiency, as confirmed by surface photovoltage spectroscopy, electrochemical impedance spectroscopy, and transient photocurrent responses.
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