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1. WO2020093517 - PHOTOCATALYTIC MATERIAL FOR EFFICIENT AND SELECTIVE REDUCTION AND REMOVAL OF NITRATE NITROGEN IN WATER, AND PREPARATION METHOD THEREOF

Publication Number WO/2020/093517
Publication Date 14.05.2020
International Application No. PCT/CN2018/120813
International Filing Date 13.12.2018
IPC
B01J 23/652 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
38of noble metals
54combined with metals, oxides or hydroxides provided for in groups B01J23/02-B01J23/36118
56Platinum group metals
64with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
652Chromium, molybdenum or tungsten
B01J 37/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
37Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
08Heat treatment
C02F 1/30 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
30by irradiation
C02F 1/70 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
70by reduction
C02F 101/16 2006.01
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
101Nature of the contaminant
10Inorganic compounds
16Nitrogen compounds, e.g. ammonia
CPC
B01J 23/6522
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
38of noble metals
54combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
56Platinum group metals
64with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
652Chromium, molybdenum or tungsten
6522Chromium
B01J 35/004
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35Catalysts, in general, characterised by their form or physical properties
002Catalysts characterised by their physical properties
004Photocatalysts
B01J 37/082
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
37Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
08Heat treatment
082Decomposition and pyrolysis
C02F 1/30
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
30by irradiation
C02F 1/70
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
1Treatment of water, waste water, or sewage
70by reduction
C02F 2101/16
CCHEMISTRY; METALLURGY
02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
2101Nature of the contaminant
10Inorganic compounds
16Nitrogen compounds, e.g. ammonia
Applicants
  • 南京大学 NANJING UNIVERSITY [CN]/[CN]
  • 南京大学盐城环保技术与工程研究院 NANJING UNIVERSITY&YANCHENG ACADEMY OF ENVIRONMENTAL PROTECTION TECHNOLOGY AND ENGINEERING [CN]/[CN]
Inventors
  • 王津南 WANG, Jinnan
  • 候志昂 HOU, Zhiang
  • 吴超越 WU, Chaoyue
Agents
  • 南京钟山专利代理有限公司 NANJING ZHONGSHAN PATENT AGENT CO., LTD.
Priority Data
201811311199.406.11.2018CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) PHOTOCATALYTIC MATERIAL FOR EFFICIENT AND SELECTIVE REDUCTION AND REMOVAL OF NITRATE NITROGEN IN WATER, AND PREPARATION METHOD THEREOF
(FR) MATÉRIAU PHOTOCATALYTIQUE POUR UNE RÉDUCTION ET UN RETRAIT EFFICACES ET SÉLECTIFS D'AZOTE DE NITRATE DANS DE L'EAU, ET SON PROCÉDÉ DE PRÉPARATION
(ZH) 一种高效选择性光催化还原水中硝态氮的光催化材料及其制备方法
Abstract
(EN)
Disclosed is a method for preparing a photocatalytic material for efficient and selective reduction and removal of nitrate nitrogen in water, comprising the following steps: mixing gadolinium nitrate nonahydrate, chromium trioxide and urea and placing the mixture into an alumina crucible, then adding absolute ethanol and stirring the mixture evenly; placing the crucible into a muffle furnace to conduct calcination; grinding the solid obtained after calcination in a mortar to obtain GdCrO3 powder; adding the obtained GdCrO3 powder to a palladium chloride solution, then adding methanoic acid and performing UV light irradiation, whereby palladium chloride is reduced to a palladium simple substance, which is deposited onto the surface of GdCrO3, affording Pd/GdCrO3; and finally, performing centrifuging, washing and drying.
(FR)
L'invention concerne un procédé de préparation d'un matériau photocatalytique pour une réduction et un retrait efficaces et sélectifs d'azote de nitrate dans de l'eau, comprenant les étapes suivantes : mélanger du nonahydrate de nitrate de gadolinium, du trioxyde de chrome et de l'urée et placer le mélange dans un creuset en alumine, puis ajouter de l'éthanol absolu et agiter le mélange de manière uniforme ; placer le creuset dans un four à moufle pour effectuer une calcination ; broyer le solide obtenu après calcination dans un mortier pour obtenir de la poudre de GdCrO3 ; ajouter la poudre de GdCrO3 obtenue à une solution de chlorure de palladium, puis ajouter de l'acide méthanoïque Et effectuer une irradiation par lumière UV, ce par quoi le chlorure de palladium est réduit à une substance simple de palladium, qui est déposée sur la surface de GdCrO3, obtenir Pd/GdCrO3 ; et enfin, réaliser une centrifugation, le lavage et le séchage.
(ZH)
一种高效选择性还原去除水中硝态氮的光催化材料制备方法,包括如下步骤:(1)将九水合硝酸钆、三氧化二铬和尿素混合放置于氧化铝坩埚中,加入无水乙醇搅拌均匀;(2)将坩埚置于马弗炉中煅烧;(3)将煅烧后所得的固体用研钵研磨得到GdCrO 3粉末;(4)制得的GdCrO 3粉末置于氯化钯溶液中,加入甲酸并进行紫外光照射,氯化钯还原为钯单质并沉积于GdCrO 3表面得到Pd/GdCrO 3,最后进行离心、洗涤、烘干。
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