OPTICAL MATERIALS
·
2023
·
IF 3.9
Xuehu Zhang,Xiao-Jun Wang,Fan Chen,Wen Hao,Changhua Zhang,Tongtong Xuan
Metal halide perovskites are attractive light-emitting materials due to their excellent optoelectronic properties. However, the traditional preparation methods are mostly complicated. Recently, we introduced a near room temperature synthesis strategy, named H 3 PO 4 -assisted precipitation method, which has advantages of thermal- and pressure-free, eco-friendly, as well as short reaction time. Here, we taken Cs 2 InBr 5 ·H 2 O as an example to study the impacts of H 3 PO 4 on synthesis and luminescence of metal halide perovskites . Upon adding H 3 PO 4 , Cs 2 InBr 5 ·H 2 O gives a bright red emission peaked at 630 nm. Various analytic techniques, including X-ray diffraction, FTIR spectra , X-ray photoelectron spectroscopy, Scanning electron microscope , Absorption spectra , and Photoluminescence spectra were employed to investigate the structure and luminescent properties of the prepared Cs 2 InBr 5 ·H 2 O perovskites. The results indicate that H 3 PO 4 significantly affects the crystallinity , morphology and STEs emission of Cs 2 InBr 5 ·H 2 O. Additionally, various ions doping (such as Sb 3+ : Cs 2 InBr 5 ·H 2 O) and other metal halide microcrystals (such as CsPbBr 3 and CsPb 2 Br 5 ) can also be obtained with the assistance of H 3 PO 4 , indicating H 3 PO 4 is a significant additive for synthesizing and enhancing the luminescence of metal halide perovskites.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Jingyi Liang,Chao Li,Shu Zhang,Shuang Wang,Xun Hu
Dual activators can be used together or in sequence to intensify pore development in activation of biomass. If used in sequence, arrangement of an activator in first- and second-round activation dictates overall reaction network in activation and pore characteristics of activated carbon (AC). Herein, activation of willow wood with single, mixed ZnCl 2 and H 3 PO 4 , or activators in sequence (activation firstly with ZnCl 2 or H 3 PO 4 at 350 °C and the other activator subsequently at 550 °C) were conducted. The results showed that the H 3 PO 4 →ZnCl 2 sequential activation (activating first with H 3 PO 4 then with ZnCl 2 ) destructed P-O-C bonds and created additional micropores, forming H 3 PO 4 →ZnCl 2 -AC of 1344.7 m 2 /g with superior capability for adsorption of phenol from phosphorus doping. Nonetheless, The ZnCl 2 →H 3 PO 4 sequential activation did not enhance pore development (998.5 vs. 991.8 m 2 /g for H 3 PO 4 -AC) and reduced AC yield to 27.8 %, due to deficient aliphatics for second-round activation with H 3 PO 4 . Co-activation with ZnCl 2 +H 3 PO 4 only enhanced percentage of micropore but not S BET . Activation with ZnCl 2 but not H 3 PO 4 transformed fibers into densified bulky particles. However, activator selected in first-round activation determined final morphology of ACs in sequential activation.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2022
·
IF 10.753
Pingping Wang,Junli Cao,Liangang Mao,Lizhen Zhu,Yanning Zhang,Lan Zhang,Hongyun Jiang,Yongquan Zheng,Xingang Liu
The application of chemically modified biochar is a promising strategy for the remediation of contaminated (e.g., pesticides) soil. In this study, H 3 PO 4 was used to modify peanut shell to improve the remediation performance of biochar. Surface area (980.19 m 2 /g), pore volume (0.12 cm 3 /g), and the functional groups ( OH, C O, and phosphorus-containing groups) on the biochar were increased by H 3 PO 4 treatment. The sorption experimental data were well fitted by Freundlich model, while the sorption affinity ( K f ) of H 3 PO 4 modified biochar (PBC) for atrazine was 128 times greater than that of the untreated biochar (BC) in the aquatic systems. The K f values of PBC-amended soil to atrazine were increased by 13.57 times than that of single soil. The strong sorption of PBC on atrazine delayed the degradation of atrazine in soil, and the residual percentage of atrazine in soil and soil-PBC mixture were 4.90% and 71.44% at the end of 60-day incubation, with the degradation half-life increased from 13.3 to 121.6 d. The analysis of high-throughput sequencing results showed that atrazine reduced the diversity of soil microbial community, but the abundance of microorganisms with degradation function increased and became dominant species. The addition of PBC in soil accelerated the microbial remediation of atrazine stress, which may promote the soil nitrogen cycle. Therefore, amendment of atrazine contaminated soil with PBC can reduce the environmental risk of atrazine and benefit the soil microbial ecology.
研究领域:
环境科学
·
土壤学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Wenju Zhu,Wei Peng,Dongxiang Li,Shuolong Wang,Shuang Xu,Kai Ma,Jiarui Liu,Bowen Cheng
The concept of homologous flame retardant of cottonseed meal to cotton fiber is reported. According to the chemical bond characteristics of the amide bond, ester bond, and glycosidic bond in crude protein, crude fiber, and crude fat cottonseed meal, we developed a new system of H 2 O 2 -H 3 PO 4 degradation of dissolved cottonseed meal to prepare flame retardant. The study focuses on preparing water-soluble flame retardant (H 2 O 2 -H 3 PO 4 degradation Cottonseed meal, HPCm) by one-pot degradation of cottonseed meal and achieving durable flame retardancy for cotton fiber. The controllable degradation and dissolution conditions were optimized by orthogonal experiment, achieving a degradation rate of cottonseed meal that reached 88.4 %. The LOI of flame retardant cotton fiber after washing 50 LCS was still maintained at 36.2 %, and the damage length was 55 mm when the concentration of flame retardant HPCm was 60 g/L. The results of X-ray photoelectron spectroscopy, scanning electron microscopy and cone calorimetry showed that HPCm exhibited a synergistic flame retardant mechanism dominated by condensed phase flame retardant and supplemented by gas phase flame retardant. This method successfully produced a durable flame retardant for cotton fiber.
研究领域:
材料科学
·
纺织工程
·
阻燃化学
·
农业化学
·
高分子化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2013
·
IF 2.853
Fan Yang,Jie Fu,Jing Mo,Xiuyang Lu
The mixed-acid systems of four Lewis acids (FeCl3, CrCl3, ZnCl2, and CuCl2) combining three Brønsted acids (H2SO4, HCl, and H3PO4) were evaluated for the decomposition of glucose to produce levulinic acid (LA). The CrCl3–H3PO4 system had a strong synergic catalytic activity for the decomposition of glucose to LA. The effects of the ratio of CrCl3 and H3PO4 on glucose, fructose, and 5-hydroxymethylfurfural (5-HMF) decompositions were investigated. The mixed-acid system showed the strongest synergic catalytic activity for glucose, fructose, and 5-HMF decompositions when the ratio of CrCl3 in the CrCl3–H3PO4 system was 0.4–0.5. To probe the synergic catalysis mechanism of the CrCl3–H3PO4 system, the synergic catalytic activities of CrCl3–phosphates (KH2PO4, K2HPO4, and K3PO4) systems on glucose decomposition were also evaluated. The possible synergic catalysis mechanisms were proposed. This study provides insights for the synergic catalysis mechanism of hexose conversion to yield LA.
研究领域:
化学工程
·
可再生能源
·
催化科学
✓ 已验证
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Ye Xiao,Xiaomin Zhu,Huihui Zheng,Qin Tang,Rongliang Qiu
Rice husk is a locally available biomass for preparation of adsorbents to deal with cadmium (Cd) contamination in paddy system. In this study, phosphorylation of rice husk using H 3 PO 4 and NH 4 H 2 PO 4 was carried out in the presence of urea at 165℃ to obtain APB-C and NPB-C, respectively. According to the material characterizations, phosphonyl groups were successfully grafted on the rice husk. Both APB-C and NPB-C had high performance for Cd(II) adsorption with the capacities of 146 and 129 mg/g, respectively. The main mechanism of Cd(II) adsorption was ion exchange with NH 4 + . The adsorption capacity was linearly corelated with phosphorus content (R 2 = 0.9997), while the Langmuir constant had high correlation efficient (R 2 = 0.996) with phosphonyl group percentage. Further quantum chemical calculation showed higher interaction energy between Cd(II) and phosphonyl group than other groups. These results indicated that phosphonyl group governed Cd(II) adsorption on phosphorylated biomass.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2011
·Vol. 198
·期 1
·1-5
·
IF 2.496
Sijia Yan,Songjun Zeng,Xiaolu Su,Huijun Yin,Yuanqin Xiong,Weijian Xu
The development of anhydrous proton exchange membrane is critical for the polymer electrolyte membrane fuel cell (PEMFC) operating at intermediate temperature (100–200 °C). In the present work, H 3 PO 4 -doped 1,2,4-triazole-polysiloxane proton conducting membrane is successfully prepared by sol–gel reaction. The molecular structure of the PGA-xH 3 PO 4 is confirmed via Fourier-transform infrared spectroscopy (FTIR). Thermogravimetry (TG) analysis shows that the samples were thermally stable up to approximately 250 °C. The fracture surface morphology of the materials is characterized by scanning electron microscopy (SEM). The temperature dependence of proton conductivity of all the membranes exhibits an Arrhenius behavior. The proton conductivities of these membranes increase with dopant concentration and the temperature. In an anhydrous state, the proton conductivity of PGA-1H 3 PO 4 , PGA-2H 3 PO 4 and PGA-3H 3 PO 4 is 1.48 × 10 − 3 , 1.07 × 10 − 2 ,1.43 × 10 − 2 S cm − 1 at 200 °C, respectively. According to FTIR results, the added H 3 PO 4 is presumed to break up the hydrogen-bonding network of pure PGA, facilitating ring-reorientation and thus Grotthus mechanism proton transport. In PGA-2H 3 PO 4 , the extra H 3 PO 4 may act as a bridge providing effective proton conduction. Therefore the proton conductivity of PGA-2H 3 PO 4 is greatly improved compared with PGA-1H 3 PO 4 .
研究领域:
材料科学
·
燃料电池
·
质子导电膜
·
高分子化学
·
能源材料
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2018
·
IF 5.116
Siwei Zhao,Ying Chen,Zhiyang Zhao,Longfei Jiang,Chi Zhang,Jianshou Kong,Xufei Zhu
Anodic TiO 2 nanotubes have been intensively studied for the application in supercapacitors , but the formation of nanograss is often avoided for the belief that it may retard capacitive performance. We fabricate TiO 2 nanotubes topped with nanograss by H 3 PO 4 solution soaking and hydrogenation doping, which in fact increases the capacitance of nanotubes in a fast and convenient way. The new structure exhibits an enhanced areal capacitance by up to 67.7% and by up to 23.5% after 2000 times of cycling. The capacitance generally increases with the nanotube length and reaches the maximum with an optimal nanograss length. The electric charge during hydrogenation doping is determined to quantify the general doping effect. Compared with ordinary nanotubes, nanograss has larger contact area with electrolyte during doping. Therefore, the grass-topped structure yields more electric charge and Ti 3+ during doping, which attributes to the improved capacitance.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
·
表面工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Fei Wang,Li Li,Chaohui Yang,Zhongxing Cai,Ziyi Guo,Siyu Hou,Xiaoya Xie,Yinghao Chen,Jing Huang,Long Zhang
A series of GdPO 4 :5%Eu 3+ micro/nanomaterials with different morphologies and crystal structures were successfully prepared by the one-step solvothermal method using only the gadolinium source, the phosphoric acid source and ethanol as solvents, without any surfactants or templates, without further calcination and by adjusting only the ratio of phosphoric acid and gadolinium sources. They all have good dispersion and homogeneity. The morphology of the products was mainly regulated by the ratio of H 3 PO 4 to Gd(NO 3 ) 3 · 6H 2 O, with ratios of 2:1, 8:1, 16:1, 24:1, 32:1, 40:1 and 48:1 mL/g resulting in the formation of square, pillow, star, carambola, hollow cylinder, drum and jujube shaped GdPO 4 :5%Eu 3+ micro/nanomaterials, respectively. Ratios of 2:1–24:1 and 32:1–48:1 allow for the direct solvothermal synthesis of monoclinic and hexagonal phase gadolinium phosphate, simultaneously. In addition to their crystal structure and morphology, chemical bonding, thermal stability and specific surface area, their luminescence properties and magnetic resonance imaging (MRI) tracing properties have also been studied in comparison. Interestingly, the GdPO 4 :5%Eu 3+ micro/nanoparticles in the carambola shape had a higher photoluminescence intensity and relaxation rate of 0.7709 mM −1 s −1 (r 1 ) among all the morphologies. The possible mechanisms by which various morphologies of GdPO 4 :5%Eu 3+ were prepared in different ratios were analyzed, and the reasons for their effects on the fluorescence and MRI tracer properties were further investigated. This study is of reference significance for the simple-regulated synthesis of rare earth inorganic gadolinium-containing micro/nanomaterials and provides a reliable guarantee for the expansion of their multifunctional applications in UV–Vis luminescence and MRI tracing for implants.
研究领域:
材料科学
·
医学影像学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Zhan Li,Yuzhou Zhu,Fengxiang Zhang,Kai Zhou,Haihui Jiang,Libin Liu,Ligang Gai
As a commercial electrode material , activated carbon (AC) has been widely used in electrochemical energy storage systems. However, the electrochemical performance of AC for supercapacitors has not been well developed due to the absence of an ideal electrolyte. In this paper, we report on the all-temperature impressive performance of AC‖AC symmetric supercapacitors with commercial loading level (>10 mg cm −2 ) empowered by H 3 PO 4 electrolyte. The physicochemical properties of H 3 PO 4 electrolytes with different weight ratios of H 3 PO 4 to H 2 O have been characterized. The H 3 PO 4 electrolyte with H 3 PO 4 /H 2 O weight ratio of 1 endows AC‖AC supercapacitors with enhanced performance at a wide temperature range of –45–55 °C, compared with the counterparts with H 3 PO 4 /H 2 O weight ratio being 0.5 and 2. The electrochemical performance of AC‖AC supercapacitors operating with the H 3 PO 4 electrolyte (H 3 PO 4 /H 2 O = 1:1, w/w) is increased as the temperature increases from −45 to 55 °C. The impressive performance of AC‖AC supercapacitors operating with H 3 PO 4 /H 2 O weight ratio of 1 is attributed to the high conductivity and reduced water activity of the electrolyte, as confirmed by instrumental analysis and molecular dynamic simulations .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Biochar
·
2025
·Vol. 7
·期 1
·1-18
·
IF 13.5
Gao Yajie,Gao Yuan,Li Aimin
Persistent free radicals (PFRs) in biochar have attracted wide attention due to their multifaceted roles in the environment. The regulation of PFRs in biochar is not only beneficial to broaden its application potential, but also eliminates its environmental risks. However, as a common biochar modification reagent, phosphoric acid (H 3 PO 4 ) has not been studied in the field of PFRs regulation. Herein, this study systematically investigated the effect of H 3 PO 4 on PFRs in biochar under various conditions. The results indicated that H 3 PO 4 promoted the formation of PFRs in biochar at low pyrolysis temperature (< 500 °C), owing to the positive effect of catalytic cross-linking on the degradation of biomass precursor. Yet, H 3 PO 4 reduced PFRs in biochar at high pyrolysis temperature (≥ 500 °C), since the capture of H∙ or HO∙ by PO∙ and the steric hindrance changed by H 3 PO 4 , which caused the rearrangement and polycondensation of carbon structure. H 3 PO 4 also favored carbon-centered PFRs as the dominant type. The ingredients of biomass precursor, including cellulose, Fe, Ti, protein, etc., contributed to different effects on PFRs under H 3 PO 4 modification. This study provided new insights into the roles of H 3 PO 4 on the formation and transformation of PFRs in biochar, coupled with regulation strategies in the practical application. Graphical
研究领域:
环境科学
·
材料化学
·
污染控制
·
热解技术
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2014
·
IF 3.916
Yunhui Xu,Xin Liu,Xuelan Liu,Jiulong Tan,Hongling Zhu
The bamboo pulp cellulose fiber was oxidized with HNO 3 /H 3 PO 4 –NaNO 2 mixture to obtain oxidized cellulose containing different levels of carboxyl content and with high yields. The effects of HNO 3 /H 3 PO 4 –NaNO 2 mediated oxidation on structure and properties of the fiber were investigated. The results showed that an increase in carboxyl content and weight loss of oxidized fibers appeared with increasing oxidation time. Compared with the original cellulose, the oxidized fibers had lower crystallinity (29–40%) and thermal stability. The patterns of 13 C NMR, X-ray diffraction and other testing methods revealed that the oxidation mostly occurred at C6 primary hydroxyl groups of cellulose. Moreover, an oxidized fiber with 94.14–98.59% of high yields and 1.13–3.56% of carboxyl content was obtained in the range of oxidation time from 15 to 60 min, while its mechanical properties did not change significantly. This work presented some detailed information about structure–property correlations of oxidized bamboo pulp cellulose fibers and was useful in planning applications of these products.
研究领域:
材料科学
·
高分子化学
·
纤维素化学
·
纤维技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）